Abstract:
Devices for aiding installation of control lines in suspended ceiling systems; each comprising a flat base portion, a squared side having a paralleled horizontal groove formed therein to receive a portion of wall angle molding used with grids at 90° angles in relation to walls, an angled side having a paralleled horizontal groove formed therein to receive a portion of wall angle molding used with grids at 45° angles in relation to walls, threaded holes formed through top portion, first and second means for temporarily attaching devices onto wall angle moldings, means for restricting movement of main tees and cross tees which together allow a control line be wrapped around horizontal grooves, pulled taut, and wrapped around first or second means for temporarily attaching said devices onto wall angle moldings to lock said control line taut.

Description:
This application claims the benefit of provisional patent application Ser. No. 61/192,058, filed on Sep. 13, 2008 by the present inventor. 
    
    
     FEDERALLY SPONSORED RESEARCH 
     Not Applicable 
     SEQUENCE LISTING OR PROGRAM 
     Not Applicable 
     BACKGROUND 
     1. Field 
     This application relates to hand tools, specifically to improved wall angle molding attachable-detachable devices, which are used to set or install control lines, reference strings or guide strings for suspended-ceiling grids, and to temporarily restrict the movement of grid components such as main tees and cross tees. 
     2. Prior Art 
     Acoustical ceiling, Suspended ceiling, or Dropped ceiling systems are well known and are the most common ceiling systems used in stores, hospitals, libraries, office complexes and residential basement improvements or renovations. A suspended ceiling grid system comprises wall angle moldings 23.81 mm. by 23.81 mm. and 14.29 mm. by 23.81 mm. which are fastened to walls at any prescribed height, main grid members bottom face 23.81 mm. or 14.29 mm. (main tees or main runners) running in one direction of the ceiling with cross members bottom face 23.81 mm. or 14.29 mm. (cross tees) connected to adjacent main grid members to form the grid pattern. The main-tees are suspended by hanger wires looped through factory provided holes together with the wall angle molding which is secured to the wall, which together support the cross-tees and all other finish components. 
     The most common grid patterns are ninety degree angle in relation to the walls or forty-five degree angle in relation to the walls. 
     It is not common for a room to be perfectly square. So from any corner of the room, two control lines, guide lines or reference strings, are pulled taut along both walls at the distance calculated for the border panels. Originally, the strings are being positioned to the bottom of the wall angle molding by using leveling clips such those in U.S. Pat. No. 5,519,976 to Gee, 1996 May 28, and by also using grid squaring devices such those in U.S. Pat. No. 7,207,144 to Shepard, 2007 Apr. 24, grid leveling clamps, pop-rivet pins, nails, or a small perforated piece of wall angle molding, and aligned so they intersect at a ninety degree angle. This insures that the grid pattern is square. One control line is the guide for the first row of main tees and the other control line for the first row of cross tees. But these tools or methods to set or install control lines have had and still have significant problems. 
     Leveling Clips from U.S. Pat. No. 5,519,976  FIGS. 1-3 : 
     Although these leveling clips  1  are made from a thin material it is still hard to insert them between the wall (not shown) and wall angle molding  11 , because the space between the wall and wall angle molding is usually too tight, also these leveling clips can damage the finished painted walls as well as the bottom of the wall angle molding when they have to be slid to a different place, furthermore, the leveling lines  15  have to be tied and untied and then tied again through aperture  9  when the grid framer he or she encounters a longer or shorter span between the walls, these leveling clips are also not design to hold guide lines and control the straightness of the main tees and cross tees on grids framed at forty-five degree angles in relation to the walls, they have to also be pried down and out from between the wall and the wall angle molding, the grid framer, she or he also needs two different sizes of these leveling clips for the two sizes of wall angle molding which are 23.81 mm. by 23.81 mm. and 14.29 mm. by 23.81 mm. 
     Devices from U.S. Pat. No. 7,207,144  FIG. 4 : 
     In order for a grid framer to frictionally attach these devices  10  onto the main tees and control the straightness of the main tees and cross tees with guide lines He or She has to frame most of the grid, guide lines must be tied and untied and then tied again into eyelet  30  of these devices every time grid framers reposition these devices to a different place; Grid framers need to have different sizes of these devices in order to be able to work with the two width sizes of the bottom face of main tees and cross tees which are 23.81 mm. and 14.29 mm. 
     Grid Leveling Clamps  FIG. 5 : 
     These leveling clamps  1 A, when in use, do not provide enough anchoring force onto the wall angle molding (not shown) by the clamping actuator  3  and the rubber pads  2 , they come off the wall angle molding when a leveling line  15  must be pulled taut, also their structure provides no accuracy reference when setting guide lines to control the straightness of the main tees and cross tees and they are also not design to control the straightness of main tees and cross tees on grids framed at forty-five degree angles in relation to the walls. 
     Pop-Rivet Pins or Nails  FIG. 6  and  FIG. 7 : 
     By using pop-rivets  4  or nails  5  the grid framer has to first tie the control line  15  to the pop-rivet or nail, then insert the pop-rivet or nail between the wall (not shown) and the wall angle molding (not shown) underneath the mark where the main runner or cross tee is laid out to go, next, the framer, He or She has to go to the opposite mark, calculate how much line will be needed, cut the line, tie the line to the pop-rivet or nail and then pull and insert the pop-rivet or nail between the wall and the wall angle molding underneath the mark where the main runner or cross tee is laid out to go. This method is both time consuming and impractical for the wall could be damaged by the pop rivet or nail and it is not easy adjusting the control lines. 
     Small Pieces of Wall Angle Molding with a Punched Out Hole in the Middle and the Folded Extremities Cut.  FIGS. 8 and 9 : 
     This other method or tool consists of cutting small pieces of wall angle molding  1 , about one inch long, punching out a hole  9  in the middle of each piece, then cutting the extremities that are folded  1 A and  1 B; Next, the grid framer has to tie the control line  15  to the piece of wall angle molding in the previously punched out hole, then position the small piece of wall angle molding between the wall (not shown) and the wall angle molding (not shown) underneath the mark where the main runner or cross tee is to go. The grid framer, once He or She has accomplished this step, has to go to the opposite mark, calculate how much line She or He will need, cut the line, tie the line to the small piece of wall angle molding, and then pull on the line and insert the piece of wall angle molding between the wall and wall angle molding underneath the mark where the main runner or the cross tee is laid out to go. This other method or tool also lacks a practical system for installing and adjusting the control lines because it takes time to make all the small pieces, and it is also not an easy task adjusting the control lines and the walls can be easily damaged. 
     There thus remains a need to improve the method and device for installing control lines, guide lines or reference strings for controlling the straightness and squareness of main tees and cross tees in suspended ceiling systems and for temporarily holding main tees and cross tees onto wall angle moldings. 
     SUMMARY 
     I have conceived of and designed certain new and useful control line holders which are geometrically designed to work with and use the physical structure of wall angle moldings, main tees and cross tees, that also can temporarily restrict the movement of main tees and cross tees onto wall angle moldings, they facilitate and expedite the setting and the adjustment if it is needed of the control lines to control the straightness and squareness of the main tees and cross tees in suspended-ceiling grids. These control line holders can easily, speedily and accurately be attached to, and detached from a wall angle molding without damaging the wall or the wall angle molding. They enable the grid framer to work with the two different sizes of wall angle moldings which are 23.81 mm. by 23.81 mm. and 14.29 mm. by 23.81 mm. and I have also designed these tools so that they can be used with grids at forty-five degree angles as well as grids framed at ninety degree angles in relation to the walls. 
     Another feature of my tools is that they allow the grid framer to pull the control lines as taut as needed. My tools also comprise such other advantages and capabilities as will later more fully appear, and which are inherently possessed by my tools. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  Prior Art 
         FIG. 2  Prior Art 
         FIG. 3  Prior Art 
         FIG. 4  Prior Art 
         FIG. 5  Prior Art 
         FIG. 6  Prior Art 
         FIG. 7  Prior Art 
         FIG. 8  Prior Art 
         FIG. 9  Prior Art 
         FIG. 10  is a top orthogonal view of a first embodiment L 40  of my tools. 
         FIG. 11  is a top mirrored orthogonal view of  FIG. 10  that complements the first embodiment of my tools designated as R 40 . 
         FIG. 12  is a perspective view of a thumb screw  11 A seen slightly from the top. 
         FIG. 13  is a top orthogonal view of embodiment L 40  of my tools. 
         FIG. 14  is a top mirrored orthogonal view of  FIG. 13  that complements the first embodiment of my tools designated as R 40 . 
         FIG. 15  is a top orthogonal view of embodiment L 40  of my tools. 
         FIG. 16  is a top mirrored orthogonal view of  FIG. 15  that complements the first embodiment of my tools designated as R 40 . 
         FIG. 17  is a top orthogonal view of embodiment L 40  of my tools. 
         FIG. 18  is a top mirrored orthogonal view of  FIG. 17  that complements the first embodiment of my tools designated as R 40 . 
         FIG. 19  is an orthogonal side view of embodiment L 40  seen from the right. 
         FIG. 20  is an orthogonal side view of embodiment R 40  seen from the left. 
         FIG. 21  is an orthogonal side view of embodiment L 40  seen from the left. 
         FIG. 22  is an orthogonal side view of embodiment R 40  seen from the right. 
         FIG. 23  is a perspective view of embodiment L 40  and R 40  with one screw each seen slightly from the top for use with grids at ninety degree angles in relation to the walls. 
         FIG. 24  is a perspective view of embodiment L 40  and R 40  with one screw each seen slightly from the bottom for use with grids at ninety degree angles in relation to the walls. 
         FIG. 25  is a perspective view of embodiment L 40  and R 40  with one screw each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 26  is a perspective view of embodiment L 40  and R 40  with one screw each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 27  is a perspective side view of embodiment L 40  and R 40  with one screw each seen slightly from the top. 
         FIG. 28  is a perspective side view of embodiment L 40  and R 40  with one screw each seen slightly from the bottom. 
         FIG. 29  is a perspective side view of embodiment L 40  and R 40  with one screw each seen slightly from the top. 
         FIG. 30  is a perspective side view of embodiment L 40  and R 40  with one screw each seen slightly from the bottom. 
         FIG. 31  is a perspective top view of embodiment R 40 , L 40 , additional L 40 , and additional R 40  in use for grids at ninety degree angles in relation to the walls. 
         FIG. 32  is a perspective side view of embodiment R 40  in use with grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 33  is a perspective side view of embodiment L 40  in use with grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 34  is a perspective side view of additional embodiment L 40  in use with grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 35  is a perspective side view of additional embodiment R 40  in use with grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 36  is a perspective top view of embodiment L 40 , R 40 , additional R 40  and additional L 40  in use with grids at forty-five degree angles in relation to the walls. 
         FIG. 37  is a perspective side view of embodiment L 40  in use with grids at forty-five degree angles in relation to the walls seen slightly from the top. 
         FIG. 38  is a perspective side view of embodiment R 40  in use with grids at forty-five degree angles in relation to the walls seen slightly from the top. 
         FIG. 39  is a perspective side view of additional embodiment R 40  in use with grids at forty-five degree angles in relation to the walls seen slightly from the top. 
         FIG. 40  is a perspective side view of additional embodiment L 40  in use with grids at forty-five degree angles in relation to the walls seen slightly from the top. 
         FIG. 41  is a perspective view of a second embodiment L 50  and R 50  with one screw each seen slightly from the top for use with grids at ninety degree angles in relation to the walls. 
         FIG. 42  is a perspective view of the second embodiment L 50  and R 50  with one screw each seen slightly from the bottom for use with grids at ninety degree angles in relation to the walls. 
         FIG. 43  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the top for use with grids at ninety degree angles in relation to the walls. 
         FIG. 44  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the bottom for use with grids at ninety degree angles in relation to the walls. 
         FIG. 45  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 46  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 47  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 48  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 49  is a perspective top view of embodiment R 50 , L 50 , additional L 50 , and additional R 50  in use for grids at ninety degree angles in relation to the walls. 
         FIG. 50  is a perspective side view of embodiment R 50  in use with grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 51  is a perspective side view of embodiment L 50  in use with grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 52  is a perspective side view of additional embodiment L 50  in use with grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 53  is a perspective side view of additional embodiment R 50  in use with grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 54  is a perspective top view of embodiment L 50 , R 50 , additional R 50  and additional L 50  in use with grids at forty-five degree angles in relation to the walls. 
         FIG. 55  is a perspective side view of the second embodiment L 50  in use with one screw seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 56  is a perspective side view of the second embodiment R 50  in use with one screw seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 57  is a perspective side view of additional embodiment R 50  in use with one screw seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 58  is a perspective side view of additional embodiment L 50  in use with one screw seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 59  is a perspective view of a third embodiment L 60  and R 60  with two screws each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 60  is a perspective view of the third embodiment L 60  and R 60  with two screws (not fully seen) each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 61  is a perspective view of the third embodiment L 60  and R 60  with two screws each seen slightly from the top for use with grids at ninety degree angles in relation to the walls. 
         FIG. 62  is a perspective view of the third embodiment L 60  and R 60  with two screws (not fully seen) each seen slightly from the bottom for use with grids at ninety degree angles in relation to the walls. 
         FIG. 63  is a perspective side view of the third embodiment L 60  and R 60  with two screws each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 64  is a perspective side view of the third embodiment L 60  and R 60  with two screws each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 65  is an exploded perspective side view of the third embodiment L 60  and R 60  with two screws each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 66  is an exploded perspective side view of the third embodiment L 60  and R 60  with two screws each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 67  is a perspective top view of the third embodiment R 60 , L 60 , additional L 60 , and additional R 60  in use for grids at ninety degree angles in relation to the walls. 
         FIG. 68  is a perspective side view of the third embodiment R 60  in use with two screws (one screw is not fully seen) seen slightly from the top for use with grids at ninety degree angles in relation to the walls. 
         FIG. 69  is a perspective side view of the third embodiment L 60  in use with two screws (one screw is not fully seen) seen slightly from the top for use with grids at ninety degree angles in relation to the walls. 
         FIG. 70  is a perspective side view of additional third embodiment L 60  in use with two screws (one screw is not fully seen) seen slightly from the top for use with grids at ninety degree angles in relation to the walls. 
         FIG. 71  is a perspective side view of additional third embodiment R 60  in use with two screws (one screw is not fully seen) seen slightly from the top for use with grids at ninety degree angles in relation to the walls. 
         FIG. 72  is a perspective top view of the third embodiment L 60 , R 60 , additional R 60  and additional L 60  in use with grids at forty-five degree angles in relation to the walls. 
         FIG. 73  is a perspective side view of the third embodiment L 60  in use with two screws seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 74  is a perspective side view of the third embodiment R 60  in use with two screws seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 75  is a perspective side view of additional third embodiment R 60  in use with two screws seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 76  is a perspective side view of additional third embodiment L 60  in use with two screws seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 77  is an exploded perspective view of a fourth embodiment L 70  and R 70  for use with grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 78  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the top. 
         FIG. 79  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the top. 
         FIG. 80  is an exploded perspective view of the fourth embodiment L 70  and R 70  for use with grids at ninety degree angles in relation to the walls seen slightly from the bottom. 
         FIG. 81  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the bottom. 
         FIG. 82  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the bottom. 
         FIG. 83  is an exploded perspective view of the fourth embodiment L 70  and R 70  for use with grids at forty-five degree angles in relation to the walls seen slightly from the top. 
         FIG. 84  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the top. 
         FIG. 85  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the top. 
         FIG. 86  is an exploded perspective view of the fourth embodiment L 70  and R 70  for use with grids at forty-five degree angles in relation to the walls seen slightly from the bottom. 
         FIG. 87  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the bottom. 
         FIG. 88  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the bottom. 
         FIG. 89  is an exploded perspective side view of the fourth embodiment L 70  and R 70  for use with grids at forty-five degree angles in relation to the walls seen slightly from the top. 
         FIG. 90  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the top. 
         FIG. 91  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the top. 
         FIG. 92  is an exploded perspective side view of the fourth embodiment L 70  and R 70  for use with grids at forty-five degree angles in relation to the walls seen slightly from the bottom. 
         FIG. 93  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the bottom. 
         FIG. 94  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the bottom. 
         FIG. 95  is an exploded perspective side view of the fourth embodiment L 70  and R 70  for use with grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 96  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the top. 
         FIG. 97  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the top. 
         FIG. 98  is an exploded perspective side view of the fourth embodiment L 70  and R 70  for use with grids at ninety degree angles in relation to the walls seen slightly from the bottom. 
         FIG. 99  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the bottom. 
         FIG. 100  is a perspective view of a three times enlarged attaching-detaching locking bar seen slightly from the bottom. 
         FIG. 101  is a perspective top view of embodiment R 70 , L 70 , additional L 70 , and additional R 70  in use for grids at ninety degree angles in relation to the walls. 
         FIG. 102  is a perspective side view of the fourth embodiment R 70  in use for grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 103  is a perspective side view of the fourth embodiment L 70  in use for grids at ninety degree angles in relation to the walls seen slightly from the top. 
         FIG. 104  is a perspective side view of additional embodiment L 70  in use seen slightly from the top for use with grids at ninety degree angles in relation to the walls. 
         FIG. 105  is a perspective side view of additional embodiment R 70  in use seen slightly from the top for use with grids at ninety degree angles in relation to the walls. 
         FIG. 106  is a perspective top view of embodiment L 70 , R 70 , additional R 70 , and additional L 70  in use for grids at forty-five degree angles in relation to the walls. 
         FIG. 107  is a perspective side view of the fourth embodiment L 70  in use for grids at forty-five degree angles in relation to the walls seen slightly from the top. 
         FIG. 108  is a perspective side view of the fourth embodiment R 70  in use for grids at forty-five degree angles in relation to the walls seen slightly from the top. 
         FIG. 109  is a perspective side view of additional embodiment R 70  in use seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
         FIG. 110  is a perspective side view of additional embodiment L 70  in use seen slightly from the top for use with grids at forty-five degree angles in relation to the walls. 
     
    
    
     DETAILED DESCRIPTION 
     FIGS.  10  Through  36 —First Embodiment 
     One embodiment of the control line holders is illustrated in  FIG. 10  (top orthogonal view) designated as L 40  and  FIG. 11  (mirrored top orthogonal view of  FIG. 10 ) designated as R 40  that complements this first embodiment. 
       FIG. 10  control line holder L 40  comprises a squared side L 40 A, a groove  16  formed within the squared side L 40 A (reference number and dimension not shown in this view), an angled side L 40 B, an angled groove  17  formed within angled side L 40 B (reference number and dimension not shown in this view), a group of three rounded inside corners  15 A,  15 B, and  15 C formed by grooves  16  and  17  (reference numbers and dimensions not shown in this view), a right side L 40 C, a top L 40 D, an aligning side L 40 E, a bottom side L 40 F (not seen in this view), and two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , the squared side L 40 A can have a width dimension of 25.40 mm. and the aligning side L 40 E can have a longitudinal dimension of 53.97 mm., the aligning side L 40 E and the angled side L 40 B can form a forty-five degree angle and the threaded holes  14 A and  14 B can be threaded to receive a 5 mm. by 0.80 mm. pitch threaded thumb screw  11 A. 
       FIG. 11  control line holder R 40  comprises a squared side R 40 A, a groove  16  formed within the squared side R 40 A (reference number and dimension not shown in this view), an angled side R 40 B, an angled groove  17  formed within angled side R 40 B (reference number and dimension not shown in this view), a group of three rounded inside corners  15 A,  15 B, and  15 C formed by grooves  16  and  17  (reference numbers and dimensions not shown in this view), a left side R 40 C, a top R 40 D, an aligning side R 40 E, a bottom side R 40 F (not seen in this view), and two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , the squared side R 40 A can have a width dimension of 25.40 mm., the aligning side R 40 E can have a longitudinal dimension of 53.97 mm., the aligning side R 40 E and the angled side R 40 B can form a forty-five degree angle and the threaded holes  14 A and  14 B can be threaded to receive the 5 mm. by 0.80 mm. pitch threaded thumb screw  11 A. 
       FIG. 12  shows a perspective view of the thumb screw  11 A seen slightly from the top which can be manufactured with the following dimensions: shank length at 14 mm., head diameter at 10.14 mm., head width at 4.76 mm., and the shank threaded at 5 mm. by 0.80 mm. pitch tread size. 
       FIG. 13  shows another top orthogonal view of the first embodiment L 40  with more dimensions assigned to the parts, the groove  16  formed within the squared side L 40 A can have a depth of 11.18 mm., the groove  17  formed within the angled side L 40 B can have a depth of 11.18 mm. the right side L 40 C can have a longitudinal dimension of 28.58 mm., and the center for the threaded holes is taken from the aligning side L 40 E and can be 9.52 mm. 
       FIG. 14  shows another mirrored top orthogonal view of  FIG. 13  designated as R 40  that complements this first embodiment with more dimensions assigned to the parts, the groove  16  formed within the squared side R 40 A can have a depth of 11.18 mm., the groove  17  formed within the angled side R 40 B can have a depth of 11.18 mm., the left side R 40 C can have a longitudinal dimension of 28.58 mm., and the center for the threaded holes is taken from the aligning side R 40 E and can be 9.52 mm. 
       FIG. 15  shows another top orthogonal view of the first embodiment L 40  with more dimensions assigned to the parts, the rounded corner  15 C formed by groove  17  can have a radius of 1.27 mm., and the longitudinal dimension center for the rounded corner  15 C can be 35.00 mm., and it is taken from the squared side L 40 A. 
       FIG. 16  shows another mirrored top orthogonal view of  FIG. 15  designated as R 40  that complements this first embodiment with more dimensions assigned to the parts, the rounded corner  15 C formed by groove  17  can have a radius of 1.27 mm., and the longitudinal dimension center for the rounded corner  15 C can be 35.00 mm., and it is taken from the squared side R 40 A. 
       FIG. 17  shows another top orthogonal view of the first embodiment L 40  with more dimensions assigned to the parts, the rounded corners  15 A,  15 B, and  15 C formed by grooves  16  and  17  can all have a radius of 1.27 mm. 
       FIG. 18  shows another mirrored top orthogonal view of  FIG. 17  designated as R 40  that complements this first embodiment with more dimensions assigned to the parts, the rounded corners  15 A,  15 B, and  15 C formed by grooves  16  and  17  can all have a radius of 1.27 mm. 
       FIG. 19  shows a side orthogonal view of the first embodiment L 40  seen from the right with more dimensions assigned to the parts, the groove  16  formed within the squared side L 40 A can have a height of 4.75 mm., the groove  17  formed within the angled side L 40 B can have a height of 4.75 mm. (reference number not shown in this view), the height of the top L 40 D can be 6.05 mm., and the longitudinal dimension center for the threaded hole  14 B can be 36.53 mm., and it is taken from the squared side L 40 A. 
       FIG. 20  shows a mirrored side orthogonal view of  FIG. 19  designated as R 40  seen from the left that complements this first embodiment with more dimensions assigned to the parts, the groove  16  formed within the squared side R 40 A can have a height of 4.75 mm., the groove  17  formed within the angled side R 40 B can have a height of 4.75 mm. (reference number not shown in this view), the height of the top R 40 D can be 6.05 mm., and the longitudinal dimension center for the threaded hole  14 B can be 36.53 mm., and it is taken from the squared side R 40 A. 
       FIG. 21  shows a side orthogonal view of the first embodiment L 40  seen from the left with more dimensions assigned to the parts, the height of embodiment L 40  can be 15.87 mm., the height of the bottom L 40 F can be 5.08 mm., and the longitudinal dimension center for the threaded hole  14 A can be 5.53 mm., and it is taken from the squared side L 40 A. 
       FIG. 22  shows a mirrored side orthogonal view of  FIG. 21  designated as R 40  seen from the right that complements this first embodiment with more dimensions assigned to the parts, the height of embodiment R 40  can be 15.87 mm., the height of the bottom R 40 F can be 5.08 mm., and the longitudinal dimension center for the threaded hole  14 A can be 5.53 mm. and it is taken from the squared side R 40 A. 
       FIG. 23  is a perspective view of embodiment L 40  and R 40  with one thumb screw  11 A each seen slightly from the top for use with grids at ninety degree angles in relation to the walls, control line holder L 40  comprises a squared side L 40 A, a groove  16  formed within the squared side L 40 A, an angled side L 40 B, an angled groove  17  (not seen) formed within angled side L 40 B, a group of three rounded inside corners  15 A,  15 B, and  15 C formed by grooves  16  and  17  (rounded corner  15 C not seen), a right side L 40 C, a top L 40 D, an aligning side L 40 E, a bottom side L 40 F (not seen), and two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 A, control line holder R 40  comprises a squared side R 40 A, a groove  16  formed within the squared side R 40 A, an angled side R 40 B, an angled groove  17  formed within angled side R 40 B (not seen), a group of three rounded inside corners  15 A,  15 B, and  15 C formed by grooves  16  and  17  (rounded corner  15 C not seen), a left side R 40 C, a top R 40 D, an aligning side R 40 E, a bottom side R 40 F (not seen), two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 A. 
       FIG. 24  is a perspective view of control line holders embodiment L 40  and R 40  with one thumb screw  11 A each seen slightly from the bottom for use with grids at ninety degree angles in relation to the walls, control line holder L 40  comprises a squared side L 40 A, a groove  16  formed within the squared side L 40 A, an angled side L 40 B, an angled groove  17  (not seen) formed within angled side L 40 B, a group of three rounded inside corners  15 A,  15 B and  15 C formed by grooves  16  and  17  (rounded corner  15 C not seen), a right side L 40 C, a top L 40 D, an aligning side L 40 E, a bottom side L 40 F, and two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 A, control line holder R 40  comprises a squared side R 40 A, a groove  16  formed within the squared side R 40 A, an angled side R 40 B, an angled groove  17  formed within angled side R 40 B (not seen), a group of three rounded inside corners  15 A,  15 B and  15 C formed by grooves  16  and  17  (rounded corner  15 C not seen), a left side R 40 C, a top R 40 D, an aligning side R 40 E, a bottom side R 40 F, two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 A. 
       FIG. 25  is a perspective view of control line holders embodiment L 40  and R 40  with one thumb screw  11 A each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls, control line holder L 40  comprises a squared side L 40 A (not fully seen), a groove  16  formed within the squared side L 40 A (not seen), an angled side L 40 B, an angled groove  17  formed within angled side L 40 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by grooves  16  and  17 , a right side L 40 C, a top L 40 D, an aligning side L 40 E, a bottom side L 40 F (not seen), and two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 B, control line holder R 40  comprises a squared side R 40 A (not fully seen), a groove  16  formed within the squared side R 40 A (not seen), an angled side R 40 B, an angled groove  17  formed within angled side R 40 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by grooves  16  and  17 , a left side R 40 C, a top R 40 D, an aligning side R 40 E, a bottom side R 40 F (not seen), two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 B. 
       FIG. 26  is a perspective view of control line holders embodiment L 40  and R 40  with one thumb screw  11 A each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls, control line holder L 40  comprises a squared side L 40 A (not fully seen), a groove  16  formed within the squared side L 40 A (not seen), an angled side L 40 B, an angled groove  17  formed within angled side L 40 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by grooves  16  and  17 , a right side L 40 C, a top L 40 D, an aligning side L 40 E, a bottom side L 40 F, and two threaded holes  14 A (not seen) and  14 B formed through top L 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 B, control line holder R 40  comprises a squared side R 40 A (not fully seen), a groove  16  formed within the squared side R 40 A (not seen), an angled side R 40 B, an angled groove  17  formed within angled side R 40 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by grooves  16  and  17 , a left side R 40 C, a top R 40 D, an aligning side R 40 E, a bottom side R 40 F, two threaded holes  14 A (not seen) and  14 B formed through top R 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 B. 
       FIG. 27  is a perspective side view of aligning sides L 40 E, R 40 E of control line holders embodiment L 40  and R 40  with one thumb screw  11 A each seen slightly from the top for use with grids at ninety degree angles in relation to the walls, control line holder L 40  comprises a squared side L 40 A, a groove  16  formed within the squared side L 40 A, an angled side L 40 B, an angled groove  17  formed within angled side L 40 B, a group of three rounded inside corners  15 A (not seen),  15 B, and  15 C formed by grooves  16  and  17 , a right side L 40 C, a top L 40 D, an aligning side L 40 E, a bottom side L 40 F (not seen), and two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 A, control line holder R 40  comprises a squared side R 40 A, a groove  16  formed within the squared side R 40 A, an angled side R 40 B, an angled groove  17  formed within angled side R 40 B, a group of three rounded inside corners  15 A (not seen),  15 B, and  15 C formed by grooves  16  and  17 , a left side R 40 C, a top R 40 D, an aligning side R 40 E, a bottom side R 40 F (not seen), two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 A. 
       FIG. 28  is a perspective side view of aligning sides L 40 E, R 40 E of control line holders embodiment L 40  and R 40  with one thumb screw  11 A each seen slightly from the bottom for use with grids at ninety degree angles in relation to the walls, control line holder L 40  comprises a squared side L 40 A, a groove  16  formed within the squared side L 40 A, an angled side L 40 B, an angled groove  17  formed within angled side L 40 B, a group of three rounded inside corners  15 A (not seen),  15 B, and  15 C formed by grooves  16  and  17 , a right side L 40 C, a top L 40 D, an aligning side L 40 E, a bottom side L 40 F, and two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 A, control line holder R 40  comprises a squared side R 40 A, a groove  16  formed within the squared side R 40 A, an angled side R 40 B, an angled groove  17  formed within angled side R 40 B, a group of three rounded inside corners  15 A (not seen),  15 B, and  15 C formed by grooves  16  and  17 , a left side R 40 C, a top R 40 D, an aligning side R 40 E, a bottom side R 40 F, two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 A. 
       FIG. 29  is a perspective left side L 40 C and right side R 40 C view of control line holders embodiment L 40  and R 40  with one thumb screw  11 A each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls, control line holder L 40  comprises a squared side L 40 A, a groove  16  formed within the squared side L 40 A, an angled side L 40 B, an angled groove  17  formed within angled side L 40 B, a group of three rounded inside corners  15 A,  15 B (not seen), and  15 C (not seen) formed by grooves  16  and  17 , a right side L 40 C, a top L 40 D, an aligning side L 40 E, a bottom side L 40 F (not seen), and two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 B, control line holder R 40  comprises a squared side R 40 A, a groove  16  formed within the squared side R 40 A, an angled side R 40 B, an angled groove  17  formed within angled side R 40 B, a group of three rounded inside corners  15 A,  15 B (not seen), and  15 C (not seen) formed by grooves  16  and  17 , a left side R 40 C, a top R 40 D, an aligning side R 40 E, a bottom side R 40 F (not seen), two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 B. 
       FIG. 30  is a perspective left side L 40 C and right side R 40 C view of control line holders embodiment L 40  and R 40  with one thumb screw  11 A each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls, control line holder L 40  comprises a squared side L 40 A, a groove  16  formed within the squared side L 40 A, an angled side L 40 B, an angled groove  17  formed within angled side L 40 B, a group of three rounded inside corners  15 A,  15 B (not seen), and  15 C (not seen) formed by grooves  16  and  17 , a right side L 40 C, a top L 40 D, an aligning side L 40 E, a bottom side L 40 F, and two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , and the thumb screw  11 A screwed into threaded hole  14 B, control line holder R 40  comprises a squared side R 40 A, a groove  16  formed within the squared side R 40 A, an angled side R 40 B, an angled groove  17  formed within angled side R 40 B, a group of three rounded inside corners  15 A,  15 B (not seen), and  15 C (not seen) formed by grooves  16  and  17 , a left side R 40 C, a top R 40 D, an aligning side R 40 E, a bottom side R 40 F, two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , and the thumb screw  11 A crewed into threaded hole  14 B. 
       FIG. 31  is a perspective top view of control line holders embodiment R 40 , L 40 , additional L 40 , and additional R 40  in use for grids at ninety degree angles in relation to the walls and comprises control line holder R 40  attached to the right and next to a main tee  82 A (not shown in this view) laid out mark or point one inscribed onto wall angle molding  28 A, control line  80 A pulled and held taut by control line holder L 40  attached to the left and next to a main tee  82 A (not shown in this view) laid out mark or point two inscribed onto wall angle molding  28 B, additional control line holder L 40  attached to the left and next to a cross tee  82 B (not shown in this view) laid out mark or point three inscribed onto wall angle molding  28 C, control line  80 B pulled and held taut by additional control line holder R 40  attached to the right and next to a cross tee  82 B (not shown in this view) laid out mark or point four inscribed onto wall angle molding  28 D. 
       FIG. 32  is a perspective side view of control line holder embodiment R 40  in use with grids at ninety degree angles in relation to the walls seen slightly from the top and comprises a squared side R 40 A, a groove  16  formed within the squared side R 40 A, an angled side R 40 B, a groove  17  formed within the angled side R 40 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a left side R 40 C, a top R 40 D, an aligning side R 40 E aligned to the right and next to a main tee  82 A (not shown in this view) laid out mark or point one which is inscribed onto wall angle molding  28 A, a bottom side R 40 F (not seen), two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , a thumb screw  11 A screwed into threaded hole  14 A that is applying a clamping force onto a piece of wall angle molding  28 A against the bottom of groove  16 , a loop  79  about 31.75 mm. in diameter tied from a roll of control line  80 A which is hooked from groove  17  and the top R 40 D, control line  80 A which is wrapped around counter clock wise left side R 40 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  16 , rounded corner  15 B, aligning side R 40 E, rounded corner  15 C, groove  17 , rounded corner  15 A (not seen in this view), groove  16 , rounded corner  15 B, and ending running along aligning side R 40 E. 
       FIG. 33  is a perspective side view of control line holder embodiment L 40  in use with grids at ninety degree angles in relation to the walls seen slightly from the top and comprises a squared side L 40 A, a groove  16  formed within the squared side L 40 A, an angled side L 40 B, a groove  17  formed within the angled side L 40 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a right side L 40 C (not fully seen in this view), a top L 40 D, an aligning side L 40 E aligned to the left and next to a main tee  82 A (not shown in this view) laid out mark or point two which is inscribed onto wall angle molding  28 B, a bottom side L 40 F (not seen), two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , a thumb screw  11 A screwed into threaded hole  14 A that is applying a clamping force onto a piece of wall angle molding  28 B against the bottom of groove  16 , control line  80 A which is wrapped around counter clock wise aligning side L 40 E, rounded corner  15 B, groove  16  formed within the squared side L 40 A, rounded corner  15 A (not seen in this view), right side L 40 C (not fully seen in this view), groove  17  formed within the angled side L 40 B, rounded corner  15 C, aligning side L 40 E, rounded corner  15 B, groove  16  formed within the squared side L 40 A, right side L 40 C (not fully seen in this view), pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 A, returned and let hung next to right side L 40 C (not fully seen in this view). 
       FIG. 34  is a perspective side view of additional embodiment L 40  in use with grids at ninety degree angles in relation to the walls seen slightly from the top and comprises a squared side L 40 A, a groove  16  formed within the squared side L 40 A, an angled side L 40 B, a groove  17  formed within the angled side L 40 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a right side L 40 C (not fully seen in this view), a top L 40 D, an aligning side L 40 E aligned to the left and next to a cross tee  82 B (not shown in this view) laid out mark or point three which is inscribed onto wall angle molding  28 C, a bottom side L 40 F (not seen), two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , a thumb screw  11 A screwed into threaded hole  14 A that is applying a clamping force onto a piece of wall angle molding  28 C against the bottom of groove  16 , a loop  79  about 31.75 mm. in diameter tied from control line  80 B which is hooked from groove  17  and the top L 40 D, control line  80 B which is wrapped around clock wise right side L 40 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  16  formed within the squared side L 40 A, rounded corner  15 B, aligning side L 40 E, rounded corner  15 C, groove  17  formed within the angled side L 40 B, right side L 40 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  16  formed within the squared side L 40 A, rounded corner  15 B, and ending running along aligning side L 40 E. 
       FIG. 35  is a perspective side view of additional embodiment R 40  in use with grids at ninety degree angles in relation to the walls seen slightly from the top and comprises a squared side R 40 A, a groove  16  formed within the squared side R 40 A, an angled side R 40 B, a groove  17  formed within the angled side R 40 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a left side R 40 C (not fully seen in this view), a top R 40 D, an aligning side R 40 E aligned to the right and next to a cross tee  82 B (not shown in this view) laid out mark or point four which is inscribed onto wall angle molding  28 D, a bottom side L 40 F (not seen), two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , a thumb screw  11 A screwed into threaded hole  14 A that is applying a clamping force onto a piece of wall angle molding  28 D against the bottom of groove  16 , control line  80 B which is wrapped around clock wise aligning side R 40 E, rounded corner  15 B, groove  16  formed within the squared side R 40 A, rounded corner  15 A (not seen in this view), left side R 40 C (not fully seen in this view), groove  17  formed within the angled side R 40 B, rounded corner  15 C, aligning side R 40 E, rounded corner  15 B, groove  16  formed within the squared side R 40 A, left side R 40 C (not fully seen in this view), pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 A, returned and let hung next to left side R 40 C (not fully seen in this view). 
       FIG. 36  is a perspective top view of control line holders embodiment L 40 , R 40 , additional L 40  and additional R 40  in use for grids at forty-five degree angles in relation to the walls (not shown) and comprises a chalk line  90 A snapped on the floor in the middle of the room, a chalk line  90 B snapped on the floor in the center of and perpendicular to chalk line  90 A, graduations marked in one direction on chalk line  90 A starting from where chalk line  90 A and chalk line  90 B intersect are 431.80 mm. followed by three times graduations of 863.60 mm., graduations marked in opposite directions on chalk line  90 B starting from where chalk line  90 B and  90 A intersect are 431.80 mm. followed by three times graduations of 863.60 mm., chalk line  90 C snapped on the floor and joining the last marked graduation of 863.60 mm. on chalk line  90 A and one last marked graduation of 863.60 mm. on chalk line  90 B and extending to wall angle moldings  28 B and  28 C thus creating mark  1  transferred from the floor onto wall angle molding  28 B and mark  2  transferred from the floor onto wall angle molding  28 C, chalk line  90 D snapped on the floor and joining the last marked graduation of 863.60 mm. on chalk line  90 A and one opposite last marked graduation of 863.60 mm. on chalk line  90 B and extending to wall angle moldings  28 A and  28 C thus creating mark  3  transferred from the floor onto wall angle molding  28 A and mark  4  transferred from the floor onto wall angle molding  28 C, control line holder L 40  attached to the right and next to a main tee  82 A (not shown in this view) laid out mark or point one inscribed onto wall angle molding  28 B, control line  80 A pulled and held taut by control line holder R 40  attached to the left and next to a main tee  82 A (not shown in this view) laid out mark or point two inscribed onto wall angle molding  28 C, additional control line holder R 40  attached to the left and next to a cross tee  82 B (not shown in this view) laid out mark or point three inscribed onto wall angle molding  28 A, control line  80 B pulled and held taut by additional control line holder L 40  attached to the right and next to a cross tee  82 B (not shown in this view) laid out mark or point four inscribed onto wall angle molding  28 C. 
       FIG. 37  is a perspective side view of control line holder embodiment L 40  in use with grids at forty-five degree angles in relation to the walls seen slightly from the top and comprises a squared side L 40 A, a groove  16  formed within the squared side L 40 A, an angled side L 40 B, a groove  17  formed within the angled side L 40 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a right side L 40 C, a top L 40 D, an aligning side L 40 E aligned to the right and next to a main tee  82 A (not shown in this view) laid out mark or point one which is inscribed onto wall angle molding  28 B, a bottom side L 40 F (not fully seen in this view), two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , a thumb screw  11 A screwed into threaded hole  14 B that is applying a clamping force onto a piece of wall angle molding  28 B against the bottom of groove  17 , a loop  79  about 31.75 mm. in diameter tied from control line  80 A which is hooked from groove  16  and the top L 40 D, control line  80 A which is wrapped around counter clock wise right side L 40 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  17 , rounded corner  15 C, aligning side L 40 E, rounded corner  15 B, groove  16 , rounded corner  15 A (not seen in this view), groove  17 , rounded corner  15 C, and ending running along aligning side L 40 E. 
       FIG. 38  is a perspective side view of embodiment R 40  in use with grids at forty-five degree angles in relation to the walls seen slightly from the top and comprises a squared side R 40 A, a groove  16  formed within the squared side R 40 A, an angled side R 40 B, a groove  17  formed within the angled side R 40 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a left side R 40 C (not fully seen in this view), a top R 40 D, an aligning side R 40 E aligned to the left and next to a main tee  82 A (not shown in this view) laid out mark or point two which is inscribed onto a piece of wall angle molding  28 C, a bottom side R 40 F (not fully seen in this view), two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , a thumb screw  11 A screwed into threaded hole  14 B that is applying a clamping force onto a piece of wall angle molding  28 C against the bottom of groove  17 , control line  80 A which is wrapped around counter clock wise aligning side R 40 E, rounded corner  15 C, groove  17  formed within the angled side R 40 B, rounded corner  15 A (not seen in this view), left side R 40 C (not fully seen in this view), groove  16  formed within the squared side R 40 A, rounded corner  15 B, aligning side R 40 E, rounded corner  15 C, groove  17  formed within the angled side R 40 B, left side R 40 C (not fully seen in this view), pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 A, returned and let hung next to left side R 40 C (not fully seen in this view). 
       FIG. 39  is a perspective side view of additional embodiment R 40  in use with grids at forty-five degree angles in relation to the walls seen slightly from the top and comprises a squared side R 40 A, a groove  16  formed within the squared side R 40 A, an angled side R 4013 , a groove  17  formed within the angled side R 40 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a left side R 40 C (not fully seen in this view), a top R 40 D, an aligning side R 40 E aligned to the left and next to a cross tee  82 B (not shown in this view) laid out mark or point three which is inscribed onto a piece of wall angle molding  28 A, a bottom side R 40 F (not seen), two threaded holes  14 A and  14 B formed through top R 40 D to grooves  16  and  17 , a thumb screw  11 A screwed into threaded hole  14 B that is applying a clamping force onto a piece of wall angle molding  28 A against the bottom of groove  17 , a loop  79  about 31.75 mm. in diameter tied from control line  80 B which is hooked from groove  16  and the top R 40 D, control line  80 B which is wrapped around clock wise left side R 40 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  17  formed within the angled side R 40 B, rounded corner  15 C, aligning side R 40 E, rounded corner  15 B, groove  16  formed within the squared side R 40 A, rounded corner  15 A (not seen in this view), left side R 40 C (not fully seen in this view), groove  17  formed within the angled side R 40 B, rounded corner  15 C, and ending running along aligning side R 40 E. 
       FIG. 40  is a perspective side view of additional embodiment L 40  in use with grids at forty-five degree angles in relation to the walls seen slightly from the top and comprises a squared side L 40 A, a groove  16  formed within the squared side L 40 A, an angled side L 40 B, a groove  17  formed within the angled side L 40 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a right side L 40 C (not fully seen in this view), a top L 40 D, an aligning side L 40 E aligned to the right and next to a cross tee  82 B (not shown in this view) laid out mark or point four which is inscribed onto a piece of wall angle molding  28 C, a bottom side L 40 F (not fully seen in this view), two threaded holes  14 A and  14 B formed through top L 40 D to grooves  16  and  17 , a thumb screw  11 A screwed into threaded hole  14 B that is applying a clamping force onto a piece of wall angle molding  28 C against the bottom of groove  17 , control line  80 B which is wrapped around clock wise aligning side L 40 E, rounded corner  15 C, groove  17  formed within the angled side L 40 B, rounded corner  15 A (not seen in this view), right side L 40 C (not fully seen in this view), groove  16  formed within the squared side L 40 A, rounded corner  15 B, aligning side L 40 E, rounded corner  15 C, groove  17  formed within the angled side L 40 B, right side L 40 C (not fully seen in this view) pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 A, returned and let hung next to right side L 40 C (not fully seen in this view). 
     Referring to  FIGS. 10 through 22  and by using the dimensions contained therein a person skilled in the art can use flat stock  6061  extruded aluminum and round stock  303  stainless steel material to manufacture with milling machines control line holders L 40 , R 40 , and thumb screw  11 A, then, the control line holders L 40  and R 40  can be heat treated to a T 6  condition, bright dipped and dye anodized with a nickel acetate seal. 
     There are different machines or methods for manufacturing said control line holders and said thumb screw, four of which are: 
     1. CNC (Computerized Numerical Controls) milling machines. 
     2. Manual milling machines. 
     3. CNC (Computerized Numerical Controls) plastic injection machines. 
     4. Casting. 
     Using a CNC milling machine has many advantages over the manual milling machine because an experienced CNC milling machine machinist can program said machine to perform many consecutive operations without having to change the setup and she or he can also program the machine to use a variety of milling tools such as: key seat cut milling tools, rough milling end mills, finish or fine texture milling end mills, corner rounding end mills for breaking sharp corners, insert-supplied end mills, rough milling inserts, finish or fine texture milling inserts, solid threading tools, threading-insert supplied turning tools, drill bits, dies, and roll form-plug style taps. To achieve the successful manufacture of said control line holder tools L 40 , R 40  and the thumb screw  11 A any or all of the milling tools that I have mentioned may be used. 
     Referring to  FIGS. 10 through 22  and by using the dimensions contained therein a person skilled in the art can make molds to be used with CNC plastic injection machines or to do castings of control line holders L 40 , R 40  and thumb screw  11 A. 
     To enable those skilled in the art to fully understand and practice my new and improved method of installing or setting the control lines, I will proceed to give an example as to how a suspended grid framer can use the control line holders R 40 , L 40 , additional L 40 , and additional R 40  to frame a 609.6 mm.×1219.2 mm. or 2′×4′ 90 degree angle suspended grid:
     1. Referring to  FIGS. 31 through 35  and if you are using either 23.81 mm.×23.81 mm. or 14.29 mm.×23.81 mm. wall angle moldings  28 A,  28 B,  28 C, and  28 D snap chalk lines 25.4 mm. above given finished ceiling height, by doing this you will keep all chalk line marks out of the finished ceiling&#39;s view.   2. Install wall angle moldings  28 A,  28 B,  28 C, and  28 D at prescribed height and label them as such.   3. Layout location of control lines  80 A and  80 B on wall angle moldings  28 A,  28 B,  28 C, and  28 D making sure all the marks are above the finished ceiling so no one will be able to see them.   4. The location of the control line  80 A that runs parallel to the main tee is determined by adding the border dimension plus ½ the thickness of the main tee.   5. Make sure the thumb screws  11 A are threaded into holes  14 A but not into squared grooves  16 .   6. See  FIG. 32 , control line for main tee  82 A (not shown): Grab a roll of control line  80 A and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take control line holder R 40  with the thumb screw  11 A facing up, next, hook the loop  79  from groove  17  and the top R 40 D wrap control line  80 A around counter clock wise left side R 40 C (not fully seen), rounded corner  15 A (not seen), groove  16 , rounded corner  15 B, aligning side R 40 E, rounded corner  15 C, groove  17 , rounded corner  15 A (not seen), groove  16 , rounded corner  15 B, and ending running along aligning side R 40 E.   7. See  FIG. 32 , go to main tee  82 A (not shown) laid out mark or point  1  and as you face this laid out mark attach control line holder R 40  to your right of this laid out mark or point  1  by first inserting the wall angle molding  28 A into the groove  16  formed within the squared side R 40 A, aligning side R 40 E to your right of point  1 , followed by firmly tightening the thumb screw  11 A.   8. See  FIG. 33 , roll out control line  80 A and go to the other laid out mark or point  2  for the main tee  82 A (not shown) inscribed onto wall angle molding  28 B, take control line holder L 40 , wrap the control line  80 A around counter clock wise aligning side L 40 E, rounded corner  15 B, groove  16  formed within the squared side L 40 A, rounded corner  15 A (not seen), right side L 40 C (not fully seen in this view), groove  17  formed within the angled side L 40 B, rounded corner  15 C, aligning side L 40 E, rounded corner  15 B, groove  16  formed within the squared side L 40 A, right side L 40 C (not fully seen in this view).   9. See  FIG. 33 , as you face the laid out mark or point  2  for the main tee  82 A (not shown), attach control line holder L 40  to your left of this laid out mark or point  2  by first inserting the wall angle molding  28 B into the groove  16  formed within the squared side L 40 A, aligning side L 40 E to your left of point  2 , followed by firmly tightening the thumb screw  11 A.   10. See  FIG. 33 , the control line  80 A must not be trapped against the groove  16  by the wall angle molding  28 B.   11. See  FIG. 33 , next, with your right hand grab the control line  80 A coming from holder R 40  and pull on it while at the same time with your left hand you pull at the previously wrapped control line  80 A on the holder L 40 , do this until you are satisfied with the tautness of the control line, finally, with the line that is on your left hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 A, return the line and let it hang next to right side L 40 C (not fully seen), by using the control line&#39;s  80 A pulling force and wrapping the control line  80 A counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 A and prevents it from becoming loose.   12. To adjust this control line  80 A, first, the line must be unwrapped from the screw  11 A to relieve the pulling pressure from the taut control line, second, unscrew the thumb screw  11 A four turns, then move the control line holder L 40  to either side and firmly tighten the screw back, repeat step 11 over again.   13. The location of the control line  80 B that runs perpendicular to the main tee is determined by adding the border dimension plus ½ the thickness of the cross tee.   14. See  FIG. 34 , control line for cross tee  82 B (not shown): Grab a roll of control line  80 B and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take additional control line holder L 40  with the thumb screw  11 A facing up, next, hook the loop  79  from groove  17  and the top L 40 D, wrap control line  80 B around clock wise right side L 40 C (not fully seen), rounded corner  15 A (not seen), groove  16 , rounded corner  15 B, aligning side L 40 E, rounded corner  15 C, groove  17 , right side L 40 C (not fully seen), rounded corner  15 A (not seen), groove  16 , rounded corner  15 B, and ending running along aligning side L 40 E.   15. See  FIG. 34 , go to cross tee  82 B (not shown) laid out mark or point  3  and as you face this laid out mark attach additional control line holder L 40  to your left of this laid out mark or point  3  by first inserting the wall angle molding  28 C into the groove  16  formed within the squared side L 40 A, aligning side L 40 E to your left of point  3 , followed by firmly tightening the thumb screw  11 A.   16. See  FIG. 35 , roll out control line  80 B and go to the other laid out mark or point  4  for the cross tee  82 B (not shown) inscribed onto wall angle molding  28 D, take additional control line holder R 40 , wrap the control line  80 B around clock wise aligning side R 40 E, rounded corner  15 B, groove  16  formed within the squared side R 40 A, rounded corner  15 A (not seen), left side R 40 C (not fully seen in this view), groove  17  formed within the angled side R 40 B, rounded corner  15 C, aligning side R 40 E, rounded corner  15 B, groove  16  formed within the squared side R 40 A, left side R 40 C (not fully seen in this view).   17. See  FIG. 35 , as you face the laid out mark or point  4  for the cross tee  82 B (not shown), attach control line holder R 40  to your right of this laid out mark or point  4  by first inserting the wall angle molding  28 D into the groove  16  formed within the squared side R 40 A, aligning side R 40 E to your right of point  4 , followed by firmly tightening the thumb screw  11 A.   18. See  FIG. 35 , the control line  80 B must not be trapped against the groove  16  by the wall angle molding  28 D.   19. See  FIG. 35 , next, with your left hand grab the control line  80 B coming from additional holder L 40  and pull on it while at the same time with your right hand you pull at the previously wrapped control line  80 B on the additional holder R 40 , do this until you are satisfied with the tautness of the control line, finally, with the line that is on your right hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 A, return the line and let it hang next to left side R 40 C (not fully seen), by using the control line&#39;s  80 B pulling force and wrapping the control line  80 B counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 B and prevents it from becoming loose.   20. To adjust this control line  80 B unwrap the line from the screw  11 A to relieve the pulling pressure from the taut control line  80 B, unscrew the thumb screw  11 A four turns then move the additional control line holder R 40  to either side and firmly tighten the screw back, repeat step 19 over again.   21. You have successfully installed, or set the control lines for a 90 degree angle grid.   

     Using control line holders L 40 , R 40 , additional R 40 , and additional L 40  for 609.6 mm.×609.6 mm. or 2′×2′ suspended-ceiling grids at 45 degree angles:
     1. Referring to  FIGS. 36 through 40  and if you are using either 23.81 mm.×23.81 mm. or 14.29 mm.×23.81 mm. wall angle moldings  28 A,  28 B,  28 C, and  28 D snap chalk lines 25.4 mm. above given finished ceiling height, by doing this you will keep all chalk line marks out of the finished ceiling&#39;s view.   2. Install wall angle moldings  28 A,  28 B,  28 C, and  28 D at prescribed ceiling&#39;s height and label them as such.   3. On the floor of the room establish and snap a chalk line  90 A in the middle, at the center of this line  90 A establish and snap a perpendicular chalk line  90 B making sure it is a perfect 90 degree angle.   4. From this center point where chalk line  90 A and chalk line  90 B intersect mark graduations of 431.8 mm. in three directions, then, from the marked graduations of 431.8 mm. measure and mark graduations of 863.6 mm. three times.   5. Snap a third chalk line  90 C on the floor joining the last marked graduation of 863.60 mm. on chalk line  90 A and one last marked graduation of 863.60 mm. on chalk line  90 B extending to wall angle moldings  28 B and  28 C.   6. Snap a fourth chalk line  90 D on the floor joining the last marked graduation of 863.60 mm. on chalk line  90 A and one opposite last marked graduation of 863.60 mm. on chalk line  90 B extending to wall angle moldings  28 A and  28 C.   7. You have created 4 new marks, mark  1 , mark  2 , mark  3 , and mark  4 , transfer these 4 marks from the floor up to the wall angle moldings  28 B,  28 C,  28 A, and  28 C.   8. Layout location of control lines  80 A and  80 B on wall moldings  28 B,  28 C,  28 A, and  28 C making sure all the marks are above the finished ceiling so no one will be able to see them.   9. The location of the control line  80 A that runs parallel to the main tee  82 A (not shown) is determined by inscribing ½ the thickness of the main tee parallel and to the right of mark  1  transferred from the floor onto wall angle molding  28 B thus creating point  1 , and parallel and to the left of mark  2  transferred from the floor onto wall angle molding  28 C thus creating point  2 .   10. The location of the control line  80 B that runs parallel to the cross tee  82 B (not shown) is determined by inscribing ½ the thickness of the cross tee parallel and to the left of mark  3  transferred from the floor onto wall angle molding  28 A thus creating point  3 , and parallel and to the right of mark  4  transferred from the floor onto wall angle molding  28 C thus creating point  4 .   11. Make sure the thumb screws  11 A are threaded into holes  14 B but not into angled groove  17 .   12. See  FIG. 37 , take a roll of control line  80 A and tie a loop  79  at the end, about 31.75 mm. in diameter, take control line holder L 40  and hook the loop  79  from groove  16  and the top L 40 D, wrap control line  80 A around counter clock wise right side L 40 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  17 , rounded corner  15 C, aligning side L 40 E, rounded corner  15 B, groove  16 , rounded corner  15 A (not seen in this view), groove  17 , rounded corner  15 C, and ending running along aligning side L 40 E.   13. See  FIG. 37 , go to point  1  inscribed onto wall angle molding  28 B and as you face this main tee  82 A (not shown) laid out mark or point  1  attach control line holder L 40  to your right of this point  1  by first inserting the wall angle molding  28 B into groove  17  formed within angled side L 40 B, aligning side L 40 E to your right of point  1 , followed by firmly tightening the thumb screw  11 A.   14. See  FIG. 38 , roll out control line  80 A and go to point  2 , take control line holder R 40 , wrap the control line  80 A around counter clock wise aligning side R 40 E, rounded corner  15 C, groove  17  formed within the angled side R 40 B, rounded corner  15 A (not seen), left side R 40 C (not fully seen in this view), groove  16  formed within the squared side R 40 A, rounded corner  15 B, aligning side R 40 E, rounded corner  15 C, groove  17  formed within the angled side R 40 B, left side R 40 C (not fully seen in this view).   15. See  FIG. 38 , as you face this main tee  82 A (not shown) laid out mark or point  2  attach control line holder R 40  to your left of this point  2  by first inserting the wall angle molding  28 C into groove  17 , aligning side R 40 E to your left of point  2 , followed by firmly tightening the thumb screw  11 A.   16. See  FIG. 38 , the control line must not be trapped against the groove  17  by the wall angle molding  28 C.   17. See  FIG. 38 , next, with your right hand grab the control line  80 A coming from holder L 40  and pull on it while at the same time with your left hand you pull at the previously wrapped control line on holder R 40 , do this until you are satisfied with the tautness of the line, finally with the line that is on your left hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 A, return the line and let it hang next to left side R 40 C (not fully seen), by using the control line&#39;s  80 A pulling force and wrapping the control line  80 A counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 A and prevents it from becoming loose.   18. See  FIG. 39 , control line for cross tee  82 B (not shown), Grab a roll of control line  80 B and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take additional control line holder R 40  with the thumb screw  11 A facing up, next, hook the loop  79  from groove  16  and the top R 40 D, wrap control line  80 B around clock wise left side R 40 C (not fully seen), rounded corner  15 A (not seen), groove  17 , rounded corner  15 C, aligning side R 40 E, rounded corner  15 B, groove  16 , rounded corner  15 A (not seen), left side R 40 C (not fully seen), groove  17 , rounded corner  15 C, and ending running along aligning side R 40 E.   19. See  FIG. 39 , take additional holder R 40  and go to point  3 , and as you face point  3 , attach control line holder R 40  to your left of this point  3  by first inserting the wall angle molding  28 A into groove  17 , aligning side R 40 E to your left of point  3 , followed by firmly tightening the thumb screw  11 A.   20. See  FIG. 40 , roll out control line  80 B and go to point  4 , take additional control line holder L 40  and wrap control line  80 B clock wise aligning side L 40 E, rounded corner  15 C, groove  17  formed within the angled side L 40 B, rounded corner  15 A (not seen), right side L 40 C (not fully seen in this view), groove  16  formed within the squared side L 40 A, rounded corner  15 B, aligning side L 40 E, rounded corner  15 C, groove  17  formed within the angled side L 40 B, right side L 40 C (not fully seen in this view).   21. See  FIG. 40 , as you face this cross tee  828  (not shown) laid out mark or point  4  attach control line holder L 40  to your right of this point  4  by first inserting the wall angle molding  28 C into the groove  17 , aligning side L 40 E to your right of point  4 , followed by firmly tightening the thumb screw  11 A.   22. See  FIG. 40 , the control line  80 B must not be trapped against the groove  17  by the wall angle molding  28 C.   23. See  FIG. 40 , next, with your left hand grab the control line  80 B coming from holder R 40  and pull on it while at the same time with your right hand you pull at the previously wrapped control line on holder L 40 , do this until you are satisfied with the tautness of the line, finally, with the line that is on your right hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 A, return the line and let it hang next to right side L 40 C (not fully seen), by using the control line&#39;s  80 B pulling force and wrapping the control line  80 B counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 B and prevents it from becoming loose.   24. You have set, or installed the control lines for a 45 degree angle grid.   

     DETAILED DESCRIPTION 
     FIGS.  41  Through  58 —Second Embodiment 
       FIG. 41  is a perspective view of a second embodiment L 50  and R 50  with one screw  11 A each seen slightly from the top for use with grids at ninety degree angles in relation to the walls, control line holder L 50  comprises a squared side L 50 A, a groove  16  formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B, a group of three rounded corners  15 A,  15 B formed by groove  16  and  15 C (rounded corner  15 C not seen), a side L 50 C, a top L 50 D, a 90 degree angle grid aligning side L 50 E, a bottom side L 50 F (not seen), and two threaded holes  14 A and  14 B formed through top L 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 A, control line holder R 50  comprises a squared side R 50 A, a groove  16  formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B, a group of three rounded corners  15 A,  15 B formed by groove  16  and  15 C (rounded corner  15 C not seen), a side R 50 C, a top R 50 D, a 90 degree angle grid aligning side R 50 E, a bottom side R 50 F (not seen), two threaded holes  14 A and  14 B formed through top R 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 A. 
       FIG. 42  is a perspective view of the second embodiment L 50  and R 50  with one screw each seen slightly from the bottom for use with grids at ninety degree angles in relation to the walls, control line holder L 50  comprises a squared side L 50 A, a groove  16  formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B, a group of three rounded corners  15 A,  15 B formed by groove  16  and  15 C (rounded corner  15 C not seen), a side L 50 C, a top L 50 D (not fully seen), a 90 degree angle grid aligning side L 50 E, a bottom side L 50 F, and two threaded holes  14 A and  14 B formed through top L 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 A, control line holder R 50  comprises a squared side R 50 A, a groove  16  formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B, a group of three rounded corners  15 A,  15 B formed by groove  16  and  15 C (rounded corner  15 C not seen), a side R 50 C, a top R 50 D (not fully seen), a 90 degree angle grid aligning side R 50 E, a bottom side R 50 F, two threaded holes  14 A and  14 B formed through top R 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 A. 
       FIG. 43  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the top for use with grids at ninety degree angles in relation to the walls, control line holder L 50  comprises a squared side L 50 A, a groove  16  formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B, a group of three rounded corners  15 A (rounded corner  15 A not seen),  15 B formed by groove  16  and  15 C, a side L 50 C, a top L 50 D, a 90 degree angle grid aligning side L 50 E, a bottom side L 50 F (not seen), and two threaded holes  14 A and  14 B formed through top L 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 A, control line holder R 50  comprises a squared side R 50 A, a groove  16  formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B, a group of three rounded corners  15 A (rounded corner  15 A not seen),  15 B formed by groove  16  and  15 C, a side R 50 C, a top R 50 D, a 90 degree angle grid aligning side R 50 E, a bottom side R 50 F (not seen), two threaded holes  14 A and  14 B formed through top R 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 A. 
       FIG. 44  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the bottom for use with grids at ninety degree angles in relation to the walls, control line holder L 50  comprises a squared side L 50 A, a groove  16  formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B, a group of three rounded corners  15 A (rounded corner  15 A not seen),  15 B formed by groove  16  and  15 C, a side L 50 C, a top L 50 D (not fully seen), a 90 degree angle grid aligning side L 50 E, a bottom side L 50 F, and two threaded holes  14 A and  14 B (not seen) formed through top L 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 A, control line holder R 50  comprises a squared side R 50 A, a groove  16  formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B, a group of three rounded corners  15 A (rounded corner  15 A not seen),  15 B formed by groove  16  and  15 C, a side R 50 C, a top R 50 D (not fully seen), a 90 degree angle grid aligning side R 50 E, a bottom side R 50 F, two threaded holes  14 A and  14 B (not seen) formed through top R 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 A. 
       FIG. 45  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls, control line holder L 50  comprises a squared side L 50 A, a groove  16  formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B, a group of three rounded corners  15 A,  15 B (not seen), formed by groove  16  and  15 C, a top L 50 D, a 90 degree angle grid aligning side L 50 E, a bottom side L 50 F (not seen), and two threaded holes  14 A and  14 B formed through top L 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 B, control line holder R 50  comprises a squared side R 50 A, a groove  16  formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B, a group of three rounded corners  15 A,  15 B (not seen) formed by groove  16  and  15 C, a side R 50 C, a top R 500 , a 90 degree angle grid aligning side R 50 E, a bottom side R 50 F (not seen), two threaded holes  14 A and  14 B formed though top R 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 B. 
       FIG. 46  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls, control line holder L 50  comprises a squared side L 50 A, a groove  16  formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B, a group of three rounded corners  15 A,  15 B (not seen), formed by groove  16  and  15 C, a top L 50 D (not fully seen), a 90 degree angle grid aligning side L 50 E, a bottom side L 50 F, and two threaded holes  14 A (not seen) and  14 B formed through top L 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 B, control line holder R 50  comprises a squared side R 50 A, a groove  16  formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B, a group of three rounded corners  15 A,  15 B (not seen) formed by groove  16  and  15 C, a side R 50 C, a top R 50 D (not fully seen), a 90 degree angle grid aligning side R 50 E, a bottom side R 50 F, two threaded holes  14 A (not seen) and  14 B formed through top R 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 B. 
       FIG. 47  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls, control line holder L 50  comprises a squared side L 50 A (not fully seen), a groove  16  (not fully seen) formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B, a group of three rounded corners  15 A (not seen),  15 B (not seen) formed by groove  16  and  15 C, a top L 50 D, a 90 degree angle grid aligning side L 50 E, a bottom side L 50 F (not seen), and two threaded holes  14 A and  14 B formed through top L 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 B, control line holder R 50  comprises a squared side R 50 A (not fully seen), a groove  16  (not fully seen) formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B, a group of three rounded corners  15 A (not seen),  15 B (not seen) formed by groove  16  and  15 C, a side R 50 C, a top R 50 D, a 90 degree angle grid aligning side R 50 E, a bottom side R 50 F (not seen), two threaded holes  14 A and  14 B formed through top R 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 B. 
       FIG. 48  is a perspective side view of the second embodiment L 50  and R 50  with one screw each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls, control line holder L 50  comprises a squared side L 50 A (not fully seen), a groove  16  (not fully seen) formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B, a group of three rounded corners  15 A (not seen),  15 B (not seen) formed by groove  16  and  15 C, a top L 50 D (not fully seen), a 90 degree angle grid aligning side L 50 E, a bottom side L 50 F, and two threaded holes  14 A (not seen) and  14 B formed through top L 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 B, control line holder R 50  comprises a squared side R 50 A (not fully seen), a groove  16  (not fully seen) formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B, a group of three rounded corners  15 A (not seen),  15 B (not seen) formed by groove  16  and  15 C, a side R 50 C, a top R 50 D (not fully seen), a 90 degree angle grid aligning side R 50 E, a bottom side R 50 F, two threaded holes  14 A (not seen) and  14 B formed through top R 50 D to groove  16 , and the thumb screw  11 A screwed into threaded hole  14 B. 
       FIG. 49  is a perspective top view of embodiment R 50 , L 50 , additional L 50 , and additional R 50  in use for grids at ninety degree angles in relation to the walls and comprises control line holder R 50  attached to the right and next to a main tee  82 A (not shown in this view) laid out mark or point one inscribed onto wall angle molding  28 A, control line  80 A pulled and held taut by control line holder L 50  attached to the left and next to a main tee  82 A (not shown in this view) laid out mark or point two inscribed onto wall angle molding  28 B, additional control line holder L 50  attached to the left and next to a cross tee  82 B (not shown in this view) laid out mark or point three inscribed onto wall angle molding  28 C, control line  80 B pulled and held taut by additional control line holder R 50  attached to the right and next to a cross tee  82 B (not shown in this view) laid out mark or point four inscribed onto wall angle molding  28 D. 
       FIG. 50  is a perspective side view of embodiment R 50  in use with grids at ninety degree angles in relation to the walls seen slightly from the top and comprises a squared side R 50 A, a groove  16  formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B, a group of three rounded corners  15 A (not seen),  15 B formed by groove  16  and  15 C, a side R 50 C, a top R 50 D, a 90 degree angle grid aligning side R 50 E aligned to the right of point  1  which is inscribed onto wall angle molding  28 A, a bottom side R 50 F (not seen), two threaded holes  14 A and  14 B formed through top R 50 D to groove  16 , a thumb screw  11 A screwed into threaded hole  14 A that is applying a clamping force onto a piece of wall angle molding  28 A against the bottom of groove  16 , a loop  79  about 31.75 mm. in diameter tied from a roll of control line  80 A which is hooked from groove  16  and the top R 50 D, control line  80 A which is wrapped around counter clock wise groove  16 , rounded corner  15 B, side R 50 C, rounded corner  15 C, 45 degree angle grid aligning side R 50 B, rounded corner  15 A (not seen in this view), groove  16 , rounded corner  15 B and directed towards point  2 . 
       FIG. 51  is a perspective side view of embodiment L 50  in use with grids at ninety degree angles in relation to the walls seen slightly from the top and comprises a squared side L 50 A, a groove  16  formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B, a group of three rounded corners  15 A (not seen),  15 B formed by groove  16  and  15 C, a side L 50 C, a top L 50 D, a 90 degree angle grid aligning side L 50 E aligned to the left of point  2  which is inscribed onto wall angle molding  28 B, a bottom side L 50 F (not seen), two threaded holes  14 A and  14 B formed through top L 50 D to groove  16 , a thumb screw  11 A screwed into threaded hole  14 A that is applying a clamping force onto a piece of wall angle molding  28 B against the bottom of groove  16 , control line  80 A which is wrapped around counter clock wise rounded corner  15 B, groove  16  formed within the squared side L 50 A, rounded corner  15 A (not seen in this view), 45 degree angle grid aligning side L 50 B, rounded corner  15 C, side L 50 C, rounded corner  15 B, groove  16  formed within the squared side L 50 A, 45 degree angle grid aligning side L 50 B, pulled taut and wrapped around counter clock wise three times the remainder top section of the thumb screw  11 A, returned and let hung next to 45 degree angle grid aligning side L 50 B. 
       FIG. 52  is a perspective side view of additional embodiment L 50  in use with grids at ninety degree angles in relation to the walls seen slightly from the top and comprises a squared side L 50 A, a groove  16  formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B, a group of three rounded corners  15 A (not seen),  15 B formed by groove  16  and  15 C, a side L 50 C, a top L 50 D, a 90 degree angle grid aligning side L 50 E aligned to the left of point  3  which is inscribed onto wall angle molding  28 C, a bottom side L 50 F (not seen), two threaded holes  14 A and  14 B formed through top L 50 D to groove  16 , a thumb screw  11 A screwed into threaded hole  14 A that is applying a clamping force onto a piece of wall angle molding  28 C against the bottom of groove  16 , a loop  79  about 31.75 mm. in diameter tied from a roll of control line  80 B which is hooked from groove  16  and the top L 50 D, control line  80 B which is wrapped around clock wise groove  16 , rounded corner  15 B, side L 50 C, rounded corner  15 C, 45 degree angle grid aligning side R 50 B, rounded corner  15 A (not seen in this view), groove  16 , rounded corner  15 B and directed towards point  4 . 
       FIG. 53  is a perspective side view of additional embodiment R 50  in use with grids at ninety degree angles in relation to the walls seen slightly from the top and comprises a squared side R 50 A, a groove  16  formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B, a group of three rounded corners  15 A (not seen),  15 B formed by groove  16  and  15 C, a side R 50 C, a top R 50 D, a 90 degree angle grid aligning side R 50 E aligned to the right of point  4  which is inscribed onto wall angle molding  28 D, a bottom side R 50 F (not seen), two threaded holes  14 A and  14 B formed through top R 50 D to groove  16 , a thumb screw  11 A screwed into threaded hole  14 A that is applying a clamping force onto a piece of wall angle molding  28 D against the bottom of groove  16 , control line  80 B which is wrapped around clock wise rounded corner  15 B, groove  16  formed within the squared side R 50 A, rounded corner  15 A (not seen in this view), 45 degree angle grid aligning side R 50 B, rounded corner  15 C, side R 50 C, rounded corner  15 B, groove  16  formed within the squared side R 50 A, 45 degree angle grid aligning side R 50 B, pulled taut and wrapped around counter clock wise three times the remainder top section of the thumb screw  11 A, returned and let hung next to 45 degree angle grid aligning side L 50 B. 
       FIG. 54  is a perspective top view of embodiment L 50 , R 50 , additional R 50  and additional L 50  in use with grids at forty-five degree angles in relation to the walls (not shown) and comprises a chalk line  90 A snapped on the floor in the middle of the room, a chalk line  90 B snapped on the floor in the center of and perpendicular to chalk line  90 A, graduations marked in one direction on chalk line  90 A starting from where chalk line  90 A and chalk line  90 B intersect are 431.80 mm. followed by three times graduations of 863.60 mm., graduations marked in opposite directions on chalk line  90 B starting from where chalk line  90 B and  90 A intersect are 431.80 mm. followed by three times graduations of 863.60 mm., chalk line  90 C snapped on the floor and joining the last marked graduation of 863.60 mm. on chalk line  90 A and one last marked graduation of 863.60 mm. on chalk line  90 B and extending to wall angle moldings  28 B and  28 C thus creating mark  1  transferred from the floor onto wall angle molding  28 B and mark  2  transferred from the floor onto wall angle molding  28 C, chalk line  90 D snapped on the floor and joining the last marked graduation of 863.60 mm. on chalk line  90 A and one opposite last marked graduation of 863.60 mm. on chalk line  90 B and extending to wall angle moldings  28 A and  28 C thus creating mark  3  transferred from the floor onto wall angle molding  28 A and mark  4  transferred from the floor onto wall angle molding  28 C, control line holder L 50  attached to the right and next to a main tee  82 A (not shown in this view) laid out mark or point one inscribed onto wall angle molding  28 B, control line  80 A pulled and held taut by control line holder R 50  attached to the left and next to a main tee  82 A (not shown in this view) laid out mark or point two inscribed onto wall angle molding  28 C, additional control line holder R 50  attached to the left and next to a cross tee  82 B (not shown in this view) laid out mark or point three inscribed onto wall angle molding  28 A, control line  80 B pulled and held taut by control line holder L 50  attached to the right and next to a cross tee  82 B (not shown in this view) laid out mark or point four inscribed onto wall angle molding  28 C. 
       FIG. 55  is a perspective side view of the second embodiment L 50  in use with one screw  11 A seen slightly from the top for use with grids at forty-five degree angles in relation to the walls and comprises a squared side L 50 A, a groove  16  formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B aligned to the right of point  1  which is inscribed onto wall angle molding  28 B, a group of three rounded corners  15 A,  15 B (not seen) formed by groove  16  and  15 C, a side L 50 C, a top L 50 D, a 90 degree angle grid aligning side L 50 E, a bottom side L 50 F (not fully seen in this view), two threaded holes  14 A and  14 B formed through top L 50 D to groove  16 , the thumb screw  11 A screwed into threaded hole  14 B that is applying a clamping force onto a piece of wall angle molding  28 B against the bottom of groove  16 , a loop  79  about 31.75 mm. in diameter tied from control line  80 A which is hooked from groove  16  and the top L 50 D, control line  80 A which is wrapped around counter clock wise groove  16 , rounded corner  15 A, 45 degree angle grid aligning side L 50 B, rounded corner  15 C, side L 50 C, rounded corner  15 B (not seen), groove  16 , rounded corner  15 A and ending running along the 45 degree angle grid aligning side L 50 B and directed towards point  2 . 
       FIG. 56  is a perspective side view of the second embodiment R 50  in use with one screw  11 A seen slightly from the top for use with grids at forty-five degree angles in relation to the walls and comprises a squared side R 50 A, a groove  16  formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B aligned to the left of point  2  which is inscribed onto wall angle molding  28 C, a group of three rounded corners  15 A,  15 B (not seen) formed by groove  16  and  15 C, a side R 50 C, a top R 50 D, a 90 degree angle grid aligning side R 50 E, a bottom side R 50 F (not seen), two threaded holes  14 A and  14 B formed through top R 50 D to groove  16 , the thumb screw  11 A screwed into threaded hole  14 B that is applying a clamping force onto a piece of wall angle molding  28 C against the bottom of groove  16 , line  80 A which is wrapped around counter clock wise 45 degree angle grid aligning side R 50 B, rounded corner  15 A, groove  16  formed within the squared side R 50 A, rounded corner  15 B (not seen), side R 50 C (not fully seen), rounded corner  15 C, 45 degree angle grid aligning side R 50 B, groove  16  formed within the squared side R 50 A, 90 degree angle grid aligning side R 50 E, pulled taut and wrapped around counter clock wise three times the remainder top section of the thumb screw  11 A, returned and let hung next to side R 50 C (not fully seen). 
       FIG. 57  is a perspective side view of additional embodiment R 50  in use with one screw  11 A seen slightly from the top for use with grids at forty-five degree angles in relation to the walls and comprises a squared side R 50 A, a groove  16  formed within the squared side R 50 A, a 45 degree angle grid aligning side R 50 B aligned to the left of point  3  which is inscribed onto wall angle molding  28 A, a group of three rounded corners  15 A,  15 B (not seen) formed by groove  16  and  15 C, a side R 50 C (not fully seen), a top R 50 D, a 90 degree angle grid aligning side R 50 E (not fully seen), a bottom side R 50 F (not seen), two threaded holes  14 A and  14 B formed through top R 50 D to groove  16 , the thumb screw  11 A screwed into threaded hole  14 B that is applying a clamping force onto a piece of wall angle molding  28 A against the bottom of groove  16 , a loop  79  about 31.75 mm. in diameter tied from a roll of control line  80 B which is hooked from groove  16  and the top R 500 , control line  80 B which is wrapped around clock wise groove  16 , rounded corner  15 A, 45 degree angle grid aligning side R 50 B, rounded corner  15 C, side R 50 C (not fully seen), rounded corner  15 B (not seen), groove  16 , rounded corner  15 A and ending running along the 45 degree angle grid aligning side R 50 B and directed towards point  4 . 
       FIG. 58  is a perspective side view of additional embodiment L 50  in use with one screw  11 A seen slightly from the top for use with grids at forty-five degree angles in relation to the walls and comprises a squared side L 50 A, a groove  16  formed within the squared side L 50 A, a 45 degree angle grid aligning side L 50 B aligned to the right of point  4  which is inscribed onto wall angle molding  28 C, a group of three rounded corners  15 A,  15 B (not seen) formed by groove  16  and  15 C, a side L 50 C (not fully seen), a top L 50 D, a 90 degree angle grid aligning side L 50 E (not fully seen), a bottom side L 50 F (not seen), two threaded holes  14 A and  14 B formed through top L 50 D to groove  16 , the thumb screw  11 A screwed into threaded hole  14 B that is applying a clamping force onto a piece of wall angle molding  28 C against the bottom of groove  16 , control line  80 B which is wrapped around clock wise 45 degree angle grid aligning side L 50 B, rounded corner  15 A, groove  16  formed within the squared side L 50 A, rounded corner  15 B (not seen in this view), side L 50 C (not fully seen), rounded corner  15 C, 45 degree angle grid aligning side L 50 B, rounded corner  15 A, groove  16  formed within the squared side L 50 A, 90 degree angle grid aligning side L 50 E, pulled taut and wrapped around counter clock wise three times the remainder top section of the thumb screw  11 A, returned and let hung next to side L 50 C. 
     To enable those skilled in the art to fully understand and practice my new and improved method of installing or setting the control lines, I will proceed to give an example as to how a suspended grid framer can use the control line holders R 50 , L 50 , additional L 50 , and additional R 50  to frame a 609.6 mm.×1219.2 mm. or 2′×4′ 90 degree angle suspended grid:
     1. Referring to  FIGS. 49 through 53  and if you are using either 23.81 mm.×23.81 mm. or 14.29 mm.×23.81 mm. wall angle moldings  28 A,  28 B,  28 C, and  28 D snap chalk lines 25.4 mm. above given finished ceiling height, by doing this you will keep all chalk line marks out of the finished ceiling&#39;s view.   2. Install wall angle moldings  28 A,  28 B,  28 C, and  28 D at prescribed height and label them as such.   3. Layout location of control lines  80 A and  80 B on wall angle moldings  28 A,  28 B,  28 C, and  28 D making sure all the marks are above the finished ceiling so no one will be able to see them.   4. The location of the control line  80 A that runs parallel to the main tee is determined by adding the border dimension plus ½ the thickness of the main tee.   5. Make sure the thumb screws  11 A are threaded into holes  14 A but not into squared groove  16 .   6. See  FIG. 50 , control line for main tee  82 A (not shown): Grab a roll of control line  80 A and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take control line holder R 50  with the thumb screw  11 A facing up, next, hook the loop  79  from groove  16  and the top R 50 D wrap control line  80 A around counter clock wise groove  16 , rounded corner  15 B, side R 50 C, rounded corner  15 C, 45 degree angle grid aligning side R 50 B, rounded corner  15 A (not seen in this view), groove  16 , and rounded corner  15 B.   7. See  FIG. 50 , go to main tee  82 A (not shown) laid out mark or point  1  and as you face this laid out mark or point  1  attach control line holder R 50  to your right of this laid out mark or point  1  by first inserting the wall angle molding  28 A into the groove  16  formed within the squared side R 50 A, aligning 90 degree angle grid aligning side R 50 E to your right of point  1 , followed by firmly tightening the thumb screw  11 A.   8. See  FIG. 51 , roll out control line  80 A and go to the other laid out mark or point  2  for the main tee  82 A (not shown) inscribed onto wall angle molding  28 B, take control line holder L 50 , wrap the control line  80 A around counter clock wise rounded corner  15 B, groove  16  formed within the squared side L 50 A, rounded corner  15 A (not seen in this view), 45 degree angle grid aligning side L 50 B, rounded corner  15 C, side L 50 C, rounded corner  15 B, groove  16  formed within the squared side L 50 A, 45 degree angle grid aligning side L 50 B.   9. See  FIG. 51 , as you face the laid out mark or point  2  for the main tee  82 A (not shown), attach control line holder L 50  to your left of this laid out mark or point  2  by first inserting the wall angle molding  28 B into the groove  16  formed within the squared side L 50 A, aligning 90 degree angle grid aligning side L 50 E to your left of point  2 , followed by firmly tightening the thumb screw  11 A.   10. See  FIG. 51 , the control line  80 A must not be trapped against the groove  16  by the wall angle molding  28 B.   11. See  FIG. 51 , next, with your right hand grab the control line  80 A coming from holder R 50  and pull on it while at the same time with your left hand you pull at the previously wrapped control line  80 A on the holder L 50 , do this until you are satisfied with the tautness of the line, finally with the line that is on your left hand wrap it around counter clock wise three times the remainder top section of the thumb screw  11 A, return the line and let it hang next to aligning side L 50 B, by using the control line&#39;s  80 A pulling force and wrapping the control line  80 A counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 A and prevents it from becoming loose.   12. To adjust this control line  80 A, first the line must be unwrapped from the screw  11 A to relieve the pulling pressure from the taut control line, second, unscrew the thumb screw  11 A four turns, then move the control line holder L 50  to either side and firmly tighten the screw back, repeat step 11 over again.   13. The location of the control line  80 B that runs perpendicular to the main tee is determined by adding the border dimension plus ½ the thickness of the cross tee.   14. See  FIG. 52 , control line for cross tee  82 B (not shown): Grab a roll of control line  80 B and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take additional control line holder L 50  with the thumb screw  11 A facing up, next, hook the loop  79  from groove  16  and the top L 50 D, wrap control line  80 B around clock wise groove  16 , rounded corner  15 B, side L 50 C, rounded corner  15 C, 45 degree angle grid aligning side R 50 B, rounded corner  15 A (not seen), groove  16 , rounded corner  15 B.   15. See  FIG. 52 , go to cross tee  82 B (not shown) laid out mark or point  3  and as you face this laid out mark attach additional control line holder L 50  to your left of this laid out mark or point  3  by first inserting the wall angle molding  28 C into the groove  16  formed within the squared side L 50 A, aligning 90 degree angle grid aligning side L 50 E to your left of point  3 , followed by firmly tightening the thumb screw  11 A.   16. See  FIG. 53 , roll out control line  80 B and go to the other laid out mark or point  4  for the cross tee  82 B (not shown) inscribed onto wall angle molding  28 D, take additional control line holder R 50 , wrap the control line  80 B around clock wise rounded corner  15 B, groove  16  formed within the squared side R 50 A, rounded corner  15 A (not seen in this view), 45 degree angle grid aligning side R 50 B, rounded corner  15 C, side R 50 C, rounded corner  15 B, groove  16  formed within the squared side R 50 A, 45 degree angle grid aligning side R 50 B.   17. See  FIG. 53 , as you face the laid out mark or point  4  for the cross tee  82 B (not shown), attach control line holder R 50  to your right of this laid out mark or point  4  by first inserting the wall angle molding  28 D into the groove  16  formed within the squared side R 50 A, aligning 90 degree angle grid aligning side R 50 E to your right of point  4 , followed by firmly tightening the thumb screw  11 A.   18. See  FIG. 53 , the control line  80 B must not be trapped against the groove  16  by the wall angle molding  28 D.   19. See  FIG. 53 , next, with your left hand grab the control line  80 B coming from additional holder L 50  and pull on it while at the same time with your right hand you pull at the previously wrapped control line  80 B on the additional holder R 50 , do this until you are satisfied with the tautness of the line, finally, with the line that is on your right hand wrap it around counter clock wise three times the remainder top section of the thumb screw  11 A, return the line and let it hang next to the 45 degree angle grid aligning side R 50 B, by using the control line&#39;s  80 B pulling force and wrapping the control line  80 B counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 B and prevents it from becoming loose.   20. To adjust this control line  80 B unwrap the line from the screw  11 A to relieve the pulling pressure from the taut control line  80 B, unscrew the thumb screw  11 A four turns then move the additional control line holder R 50  to either side and firmly tighten the screw back, repeat step 19 over again.   21. You have successfully installed, or set the control lines for a 90 degree angle grid.   

     Using control line holders L 50 , R 50 , additional R 50 , and additional L 50  for 609.6 mm.×609.6 mm. or 2′×2′ suspended-ceiling grids at 45 degree angle:
     1. Referring to  FIGS. 54 through 58  and if you are using either 23.81 mm.×23.81 mm. or 14.29 mm.×23.81 mm. wall angle moldings  28 A,  28 B,  28 C, and  28 D snap chalk lines 25.4 mm. above given finished ceiling height, by doing this you will keep all chalk line marks out of the finished ceiling&#39;s view.   2. Install wall angle moldings  28 A,  28 B,  28 C, and  28 D at prescribed ceiling&#39;s height and label them as such.   3. On the floor of the room establish and snap a chalk line  90 A in the middle of the room, at the center of this line  90 A establish and snap a perpendicular chalk line  90 B making sure it is a perfect 90 degree angle.   4. From this center point where chalk lines  90 A and chalk line  90 B intersect mark graduations of 431.8 mm. in three directions, then, from the marked graduations of 431.8 mm. measure and mark graduations of 863.6 mm. three times.   5. Snap a third chalk line  90 C on the floor joining the last marked graduation of 863.60 mm. on chalk line  90 A and one last marked graduation of 863.60 mm. on chalk line  90 B extending to wall angle moldings  28 B and  28 C.   6. Snap a fourth chalk line  90 D on the floor joining the last marked graduation of 863.60 mm. on chalk line  90 A and one opposite last marked graduation of 863.60 mm. on chalk line  90 B extending to wall angle moldings  28 A and  28 C.   7. You have created 4 new marks, mark  1 , mark  2 , mark  3 , and mark  4 , transfer these 4 marks from the floor up to the wall moldings  28 B,  28 C,  28 A, and  28 C.   8. Layout location of control lines  80 A and  80 B on wall moldings  28 B,  28 C,  28 A, and  28 C making sure all the marks are above the finished ceiling so no one will be able to see them.   9. The location of the control line  80 A that runs parallel to the main tee  82 A (not shown) is determined by inscribing ½ the thickness of the main tee parallel and to the right of mark  1  transferred from the floor onto wall angle molding  28 B thus creating point  1 , and parallel and to the left of mark  2  transferred from the floor onto wall angle molding  28 C thus creating point  2 .   10. The location of the control line  80 B that runs parallel to the cross tee  82 B (not shown) is determined by inscribing ½ the thickness of the cross tee parallel and to the left of mark  3  transferred from the floor onto wall angle molding  28 A thus creating point  3 , and parallel and to the right of mark  4  transferred from the floor onto wall angle molding  28 C thus creating point  4 .   11. Make sure the thumb screws  11 A are threaded into holes  14 B but not into groove  16 .   12. See  FIG. 55 , take a roll of control line  80 A and tie a loop  79  at the end, about 31.75 mm. in diameter, take control line holder L 50  and hook the loop  79  from groove  16  and the top L 50 D, wrap control line  80 A around counter clock wise groove  16 , rounded corner  15 A, 45 degree angle grid aligning side L 50 B, rounded corner  15 C, side L 50 C, rounded corner  15 B (not seen), groove  16 , rounded corner  15 A and ending running along the 45 degree angle grid aligning side L 50 B.   13. See  FIG. 55 , go to point  1  inscribed onto wall angle molding  28 B and as you face this main tee  82 A (not shown) point  1  attach control line holder L 50  to your right of this point  1  by first inserting the wall angle molding  28 B into groove  16  formed within squared side L 50 A, aligning 45 degree angle grid aligning side L 50 B to your right of point  1 , followed by firmly tightening the thumb screw  11 A.   14. See  FIG. 56 , roll out control line  80 A and go to point  2 , take control line holder R 50 , wrap the control line  80 A around counter clock wise 45 degree angle grid aligning side R 50 B, rounded corner  15 A, groove  16  formed within the squared side R 50 A, rounded corner  15 B (not seen), side R 50 C (not fully seen), rounded corner  15 C, 45 degree angle grid aligning side R 50 B, groove  16  formed within the squared side R 50 A, 90 degree angle grid aligning side R 50 E.   15. See  FIG. 56 , as you face this main tee  82 A (not shown) point  2  attach control line holder R 50  to your left of this point  2  by first inserting the wall angle molding  28 C into groove  16 , aligning 45 degree angle grid aligning side R 50 B to your left of point  2 , followed by firmly tightening the thumb screw  11 A.   16. See  FIG. 56 , the control line must not be trapped against the groove  16  by the wall angle molding  28 C.   17. See  FIG. 56 , next, with your right hand grab the control line  80 A coming from holder L 50  and pull on it while at the same time with your left hand you pull at the previously wrapped line on holder R 50 , do this until you are satisfied with the tautness of the line, finally with the line that is on your left hand wrap it around counter clock wise three times the remainder top section of the thumb screw  11 A, return the line and let it hang next to side R 50 C, by using the control line&#39;s  80 A pulling force and wrapping the control line  80 A counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 A and prevents it from becoming loose.   18. See  FIG. 57 , control line for cross tee  82 B (not shown), grab a roll of control line  80 B and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take additional control line holder R 50  with the thumb screw  11 A facing up, next, hook the loop  79  from groove  16  and the top R 50 D, wrap control line  80 B around clock wise groove  16 , rounded corner  15 A, 45 degree angle grid aligning side R 50 B, rounded corner  15 C, side R 50 C (not fully seen), rounded corner  158  (not seen), groove  16 , rounded corner  15 A and ending running along the 45 degree angle grid aligning side R 50 B.   19. See  FIG. 57 , take additional holder R 50  and go to point  3 , and as you face point  3 , attach control line holder R 50  to your left of this point  3  by first inserting the wall angle molding  28 A into groove  16 , aligning 45 degree angle grid aligning side R 50 B to your left of point  3 , followed by firmly tightening the thumb screw  11 A.   20. See  FIG. 58 , roll out control line  80 B and go to point  4 , take control line holder L 50  and wrap control line  80 B clock wise 45 degree angle grid aligning side L 50 B, rounded corner  15 A, groove  16  formed within the squared side L 50 A, rounded corner  15 B (not seen in this view), side L 50 C (not fully seen), rounded corner  15 C, 45 degree angle grid aligning side L 50 B, rounded corner  15 A, groove  16  formed within the squared side L 50 A, 90 degree angle grid aligning side L 50 E.   21. See  FIG. 58 , as you face this cross tee  82 B (not shown) point  4  attach control line holder L 50  to your right of this point  4  by first inserting the wall angle molding  28 C into the groove  16 , aligning 45 degree angle grid aligning side L 50 B to your right of point  4 , followed by firmly tightening the thumb screw  11 A.   22. See  FIG. 58 , the control line  80 B must not be trapped against the groove  16  by the wall angle molding  28 C.   23. See  FIG. 58 , next, with your left hand grab the control line  80 B coming from holder R 50  and pull on it while at the same time with your right hand you pull at the previously wrapped line on holder L 50 , do this until you are satisfied with the tautness of the line, finally, with the line that is on your right hand wrap it around counter clock wise three times the remainder top section of the thumb screw  11 A, return the line and let it hang next to side L 50 C, by using the control line&#39;s  80 B pulling force and wrapping the control line  80 B counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 B and prevents it from becoming loose.   24. You have set, or installed the control lines for a 45 degree angle grid.   

     DETAILED DESCRIPTION 
     FIGS.  59  Through  76 —Third Embodiment 
       FIG. 59  is a perspective view of a third embodiment L 60  and R 60  with two thumb screws  11 A and  11 B each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls, control line holder L 60  comprises a squared side L 60 A, a groove  16  formed within the squared side L 60 A, an angled side L 60 B, an angled groove  17  (not fully seen) formed within angled side L 60 B, a group of three rounded inside corners  15 A,  15 B, and  15 C formed by grooves  16  and  17  (rounded corner  15 C is not seen), a right side L 60 C, a top L 60 D, an aligning side L 60 E, a bottom side L 60 F (not seen), and four threaded holes  14 A,  14 B,  14 C, and  14 D formed through top L 60 D to grooves  16  and  17 , the thumb screws  11 A and  11 B are screwed into threaded holes  14 C and  14 D, control line holder R 60  comprises a squared side R 60 A, a groove  16  formed within the squared side R 60 A, an angled side R 60 B, an angled groove  17  formed within angled side R 60 B (not fully seen), a group of three rounded inside corners  15 A,  15 B, and  15 C formed by grooves  16  and  17  (rounded corner  15 C not seen), a left side R 60 C, a top R 60 D, an aligning side R 60 E, a bottom side R 60 F (not seen), four threaded holes  14 A,  14 B,  14 C, and  14 D formed through top R 60 D to grooves  16  and  17 , the thumb screws  11 A and  11 B are screwed into threaded holes  14 C and  14 D. 
       FIG. 60  is a perspective view of the third embodiment L 60  and R 60  with two screws  11 A (not seen) and  11 B (not fully seen) each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls, control line holder L 60  comprises a squared side L 60 A, a groove  16  formed within the squared side L 60 A, an angled side L 60 B, an angled groove  17  (not fully seen) formed within angled side L 60 B, a group of three rounded inside corners  15 A,  15 B, and  15 C formed by grooves  16  and  17  (rounded corner  15 C not seen), a right side L 60 C, a top L 60 D, an aligning side L 60 E, a bottom side L 60 F, and four threaded holes  14 A,  14 B,  14 C (not seen), and  14 D (not seen), the thumb screws  11 A (not seen) and  11 B (not fully seen) are screwed into threaded holes  14 C (not seen) and  14 D (not seen), control line holder R 60  comprises a squared side R 60 A, a groove  16  formed within the squared side R 60 A, an angled side R 60 B, an angled groove  17  formed within angled side R 60 B (not fully seen), a group of three rounded inside corners  15 A, 15 B, and  15 C formed by grooves  16  and  17  (rounded corner  15 C is not seen), a left side R 60 C, a top R 60 D, an aligning side R 60 E, a bottom side R 60 F, four threaded holes  14 A, 14 B,  14 C (not seen), and  14 D (not seen), the thumb screws  11 A (not seen) and  11 B (not fully seen) are screwed into threaded holes  14 C (not seen) and  14 D (not seen). 
       FIG. 61  is a perspective view of the third embodiment L 60  and R 60  with two thumb screws  11 A and  11 B each seen slightly from the top for use with grids at ninety degree angles in relation to the walls, control line holder L 60  comprises a squared side L 60 A (not fully seen), a groove  16  formed within the squared side L 60 A (not fully seen), an angled side L 60 B, an angled groove  17  formed within angled side L 60 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by grooves  16  and  17 , a right side L 60 C, a top L 60 D, an aligning side L 60 E, a bottom side L 60 F (not seen), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top L 60 D to grooves  16  and  17 , and the thumb screws  11 A and  11 B are screwed into threaded holes  14 A and  14 B, control line holder R 60  comprises a squared side R 60 A (not fully seen), a groove  16  formed within the squared side R 60 A (not fully seen), an angled side R 60 B, an angled groove  17  formed within angled side R 60 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by grooves  16  and  17 , a left side R 60 C, a top R 60 D, an aligning side R 60 E, a bottom side R 60 F (not seen), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top R 60 D to grooves  16  and  17 , and the thumb screws  11 A and  11 B are screwed into threaded holes  14 A and  14 B. 
       FIG. 62  is a perspective view of the third embodiment L 60  and R 60  with two thumb screws  11 A (not seen) and  11 B (not fully seen) each seen slightly from the bottom for use with grids at ninety degree angles in relation to the walls, control line holder L 60  comprises a squared side L 60 A (not fully seen), a groove  16  formed within the squared side L 60 A (not fully seen), an angled side L 60 B, an angled groove  17  formed within angled side L 60 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by grooves  16  and  17 , a right side L 60 C, a top L 60 D, an aligning side L 60 E, a bottom side L 60 F, four threaded holes  14 A (not seen),  14 B (not seen),  14 C and  14 D, and the thumb screws  11 A (not seen) and  11 B (not fully seen) are screwed into threaded holes  14 A (not seen) and  14 B (not seen), control line holder R 60  comprises a squared side R 60 A (not fully seen), a groove  16  formed within the squared side R 60 A (not fully seen), an angled side R 60 B, an angled groove  17  formed within angled side R 60 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by grooves  16  and  17 , a left side R 60 C, a top R 60 D, an aligning side R 60 E, a bottom side R 60 F, four threaded holes  14 A (not seen),  14 B (not seen)  14 C and  14 D, and the thumb screws  11 A (not seen) and  11 B (not fully seen) are screwed into threaded holes  14 A (not seen) and  14 B (not seen). 
       FIG. 63  is a perspective side view of the third embodiment L 60  and R 60  with two thumb screws  11 A and  11 B each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls, control line holder L 60  comprises a squared side L 60 A, a groove  16  formed within the squared side L 60 A, an angled side L 60 B, an angled groove  17  formed within angled side L 60 B, a group of three rounded inside corners  15 A (not seen),  15 B and  15 C formed by grooves  16  and  17 , a right side L 60 C, a top L 60 D, an aligning side L 60 E, a bottom side L 60 F (not seen), and four threaded holes  14 A,  14 B,  14 C and  14 D formed through top L 60 D to grooves  16  and  17 , and the thumb screws  11 A and  11 B are screwed into threaded holes  14 C and  14 D, control line holder R 60  comprises a squared side R 60 A, a groove  16  formed within the squared side R 60 A, an angled side R 60 B, an angled groove  17  formed within angled side R 60 B, a group of three rounded inside corners  15 A (not seen),  15 B and  15 C formed by grooves  16  and  17 , a left side R 60 C, a top R 60 D, an aligning side R 60 E, a bottom side R 40 F (not seen), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top R 60 D to grooves  16  and  17 , and the thumb screws  11 A and  11 B are screwed into threaded holes  14 C and  14 D. 
       FIG. 64  is a perspective side view of the third embodiment L 60  and R 60  with two thumb screws  11 A and  11 B each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls, control line holder L 60  comprises a squared side L 60 A, a groove  16  formed within the squared side L 60 A, an angled side L 60 B, an angled groove  17  formed within angled side L 60 B, a group of three rounded inside corners  15 A (not seen),  15 B and  15 C formed by grooves  16  and  17 , a right side L 60 C, a top L 60 D, an aligning side L 60 E, a bottom side L 60 F, and four threaded holes  14 A,  14 B,  14 C and  14 D formed through top L 60 D to grooves  16  and  17 , and the thumb screws  11 A and  11 B are screwed into threaded holes  14 C and  14 D, control line holder R 60  comprises a squared side R 60 A, a groove  16  formed within the squared side R 60 A, an angled side R 60 B, an angled groove  17  formed within angled side R 60 B, a group of three rounded inside corners  15 A (not seen),  15 B and  15 C formed by grooves  16  and  17 , a left side R 60 C, a top R 60 D, an aligning side R 60 E, a bottom side R 60 F, four threaded holes  14 A,  14 B,  14 C and  14 D formed through top R 60 D to grooves  16  and  17 , and the thumb screws  11 A and  11 B are screwed into threaded holes  14 C and  14 D. 
       FIG. 65  is an exploded perspective side view of the third embodiment L 60  and R 60  with two thumb screws  11 A and  11 B each seen slightly from the top for use with grids at forty-five degree angles in relation to the walls, control line holder L 60  comprises a squared side L 60 A, a groove  16  formed within the squared side L 60 A, an angled side L 60 B, an angled groove  17  formed within angled side L 60 B, a group of three rounded inside corners  15 A,  15 B (not seen) and  15 C (not seen) formed by grooves  16  and  17 , a right side L 60 C, a top L 60 D, an aligning side L 60 E (not fully seen), a bottom side L 60 F (not seen), and four threaded holes  14 A,  14 B,  14 C and  14 D formed through top L 60 D to grooves  16  and  17 , and the thumb screws  11 A and  11 B aligned to threaded holes  14 C and  14 D, control line holder R 60  comprises a squared side R 60 A, a groove  16  formed within the squared side R 60 A, an angled side R 60 B, an angled groove  17  formed within angled side R 60 B, a group of three rounded inside corners  15 A,  15 B (not seen) and  15 C (not seen) formed by grooves  16  and  17 , a left side R 60 C, a top R 60 D, an aligning side R 60 E (not fully seen), a bottom side R 60 F (not seen), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top R 60 D to grooves  16  and  17 , and the thumb screws  11 A and  11 B aligned to threaded holes  14 C and  14 D. 
       FIG. 66  is an exploded perspective side view of the third embodiment L 60  and R 60  with two thumb screws  11 A and  11 B each seen slightly from the bottom for use with grids at forty-five degree angles in relation to the walls, control line holder L 60  comprises a squared side L 60 A, a groove  16  formed within the squared side L 60 A, an angled side L 60 B, an angled groove  17  formed within angled side L 60 B, a group of three rounded inside corners  15 A,  15 B (not seen), and  15 C (not seen) formed by grooves  16  and  17 , a right side L 60 C, a top L 60 D, an aligning side L 60 E (not fully seen), a bottom side L 60 F, and four threaded holes  14 A,  14 B (not seen),  14 C and  14 D, the thumb screws  11 A and  11 B aligned to threaded holes  14 C and  14 D, control line holder R 60  comprises a squared side R 60 A, a groove  16  formed within the squared side R 60 A, an angled side R 60 B, an angled groove  17  formed within angled side R 60 B, a group of three rounded inside corners  15 A,  15 B (not seen) and  15 C (not seen) formed by grooves  16  and  17 , a left side R 60 C, a top R 60 D, an aligning side R 60 E (not fully seen), a bottom side R 60 F, four threaded holes  14 A,  14 B (not seen),  14 C and  14 D, the thumb screws  11 A and  11 B aligned to threaded holes  14 C and  14 D. 
       FIG. 67  is a perspective top view of the third embodiment R 60 , L 60 , additional L 60 , and additional R 60  in use for grids at ninety degree angles in relation to the walls and comprises control line holder R 60  attached to the right and next to a main tee  82 A (not shown in this view) laid out mark or point one inscribed onto wall angle molding  28 A, control line  80 A pulled and held taut by control line holder L 60  attached to the left and next to a main tee  82 A (not shown in this view) laid out mark or point two inscribed onto wall angle molding  28 B, additional control line holder L 60  attached to the left and next to a cross tee  82 B (not shown in this view) laid out mark or point three inscribed onto wall angle molding  28 C, control line  80 B pulled and held taut by additional control line holder R 60  attached to the right and next to a cross tee  82 B (not shown in this view) laid out mark or point four inscribed onto wall angle molding  28 D. 
       FIG. 68  is a perspective side view of the third embodiment R 60  in use with two thumb screws  11 A (not fully seen) and  11 B seen slightly from the top for use with grids at ninety degree angles in relation to the walls and comprises a squared side R 60 A, a groove  16  formed within the squared side R 60 A, an angled side R 60 B, a groove  17  formed within the angled side R 60 B, a group of three rounded corners  15 A (not seen),  15 B, and  15 C formed by grooves  16  and  17 , a left side R 60 C, a top R 60 D, an aligning side R 60 E aligned to the right of point  1  which is inscribed onto wall angle molding  28 A, a bottom side R 60 F (not seen), four threaded holes  14 A (not seen),  14 B,  14 C and  14 D formed through top R 60 D to grooves  16  and  17 , thumb screw  11 A (not fully seen) screwed into threaded hole  14 A (not seen) that is applying a clamping force onto a piece of wall angle molding  28 A against the bottom of groove  16 , thumb screw  11 B screwed into threaded hole  14 B that is applying a clamping force onto a piece of main tee  82 A (shown sketched with dash lines) and wall angle molding  28 A against the bottom of groove  16 , a loop  79  about 31.75 mm. in diameter tied from a roll of control line  80 A which is hooked from groove  17  and the top R 60 D, control line  80 A which is wrapped around counter clock wise left side R 60 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  16 , rounded corner  15 B, aligning side R 60 E, rounded corner  15 C, groove  17 , left side R 60 C (not fully seen), rounded corner  15 A (not seen in this view), groove  16 , rounded corner  15 B, and ending running along aligning side R 60 E. 
       FIG. 69  is a perspective side view of the third embodiment L 60  in use with two screws  11 A (not fully seen) and  11 B seen slightly from the top for use with grids at ninety degree angles in relation to the walls and comprises a squared side L 60 A, a groove  16  formed within the squared side L 60 A, an angled side L 60 B, a groove  17  formed within the angled side L 60 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a right side L 60 C (not fully seen in this view), a top L 60 D, an aligning side L 60 E aligned to the left of point  2  which is inscribed onto wall angle molding  28 B, a bottom side L 60 F (not seen), four threaded holes  14 A (not seen),  14 B,  14 C and  14 D formed through top L 60 D to grooves  16  and  17 , thumb screw  11 A (not fully seen) screwed into threaded hole  14 A (not seen) that is applying a clamping force onto a piece of wall angle molding  28 A against the bottom of groove  16 , thumb screw  11 B screwed into threaded hole  14 B that is applying a clamping force onto a piece of main tee  82 A (shown sketched with dash lines) and wall angle molding  28 B against the bottom of groove  16 , control line  80 A which is wrapped around counter clock wise aligning side L 60 E, rounded corner  15 B, groove  16  formed within the squared side L 60 A, rounded corner  15 A (not seen in this view), right side L 60 C (not fully seen in this view), groove  17  formed within the angled side L 60 B, rounded corner  15 C, aligning side L 60 E, rounded corner  15 B, groove  16  formed within the squared side L 60 A, right side L 60 C (not fully seen in this view), pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 A (not fully seen in this view), returned and let hung next to right side L 60 C (not fully seen in this view). 
       FIG. 70  is a perspective side view of additional third embodiment L 60  in use with two screws  11 A (not fully seen) and  11 B seen slightly from the top for use with grids at ninety degree angles in relation to the walls and comprises a squared side L 60 A, a groove  16  formed within the squared side L 60 A, an angled side L 60 B, a groove  17  formed within the angled side L 60 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a right side L 60 C (not fully seen in this view), a top L 60 D, an aligning side L 60 E aligned to the left of point  3  which is inscribed onto wall angle molding  28 C, a bottom side L 60 F (not seen), four threaded holes  14 A (not seen),  14 B,  14 C and  14 D formed through top L 60 D to grooves  16  and  17 , thumb screw  11 A (not fully seen) screwed into threaded hole  14 A (not seen) that is applying a clamping force onto a piece of wall angle molding  28 C against the bottom of groove  16 , thumb screw  11 B screwed into threaded hole  14 B that is applying a clamping force onto a piece of cross tee  82 B (shown sketched with dashed lines) and wall angle molding  28 C against the bottom of groove  16 , a loop  79  about 31.75 mm. in diameter tied from control line  80 B which is hooked from groove  17  and the top L 60 D, control line  80 B which is wrapped around clock wise right side L 60 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  16  formed within the squared side L 60 A, rounded corner  15 B, aligning side L 60 E, rounded corner  15 C, groove  17  formed within the angled side L 60 B, right side L 60 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  16  formed within the squared side L 60 A, rounded corner  15 B, and ending running along aligning side L 60 E. 
       FIG. 71  is a perspective side view of additional third embodiment R 60  in use with two screws  11 A (not fully seen) and  11 B seen slightly from the top for use with grids at ninety degree angles in relation to the walls and comprises a squared side R 60 A, a groove  16  formed within the squared side R 60 A, an angled side R 60 B, a groove  17  formed within the angled side R 60 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a left side R 60 C (not fully seen in this view), a top R 60 D, an aligning side R 60 E aligned to the right of point  4  which is inscribed onto wall angle molding  28 D, a bottom side L 60 F (not seen), four threaded holes  14 A (not seen),  14 B,  14 C and  14 D formed through top R 60 D to grooves  16  and  17 , thumb screw  11 A (not fully seen) screwed into threaded hole  14 A (not seen) that is applying a clamping force onto a piece of wall angle molding  28 D against the bottom of groove  16 , thumb screw  11 B screwed into threaded hole  14 B that is applying a clamping force onto a piece of cross tee  82 B (shown sketched with dashed lines) and wall angle molding  28 D against the bottom of groove  16 , control line  80 B which is wrapped around clock wise aligning side R 60 E, rounded corner  15 B, groove  16  formed within the squared side R 60 A, rounded corner  15 A (not seen in this view), left side R 60 C (not fully seen in this view), groove  17  formed within the angled side R 60 B, rounded corner  15 C, aligning side R 60 E, rounded corner  15 B, groove  16  formed within the squared side R 60 A, left side R 60 C (not fully seen in this view), pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 A, returned and let hung next to left side R 60 C (not fully seen in this view). 
       FIG. 72  is a perspective top view of the third embodiment L 60 , R 60 , additional R 60  and additional L 60  in use with grids at forty-five degree angles in relation to the walls (not shown) and comprises a chalk line  90 A snapped on the floor in the middle of the room, a chalk line  90 B snapped on the floor in the center of and perpendicular to chalk line  90 A, graduations marked in one direction on chalk line  90 A starting from where chalk line  90 A and chalk line  90 B intersect are 431.80 mm. followed by three times graduations of 863.60 mm., graduations marked in opposite directions on chalk line  90 B starting from where chalk line  90 B and  90 A intersect are 431.80 mm. followed by three times graduations of 863.60 mm., chalk line  90 C snapped on the floor and joining the last marked graduation of 863.60 mm. on chalk line  90 A and one last marked graduation of 863.60 mm. on chalk line  90 B and extending to wall angle moldings  28 B and  28 C thus creating mark  1  transferred from the floor onto wall angle molding  28 B and mark  2  transferred from the floor onto wall angle molding  28 C, chalk line  90 D snapped on the floor and joining the last marked graduation of 863.60 mm. on chalk line  90 A and one opposite last marked graduation of 863.60 mm. on chalk line  90 B and extending to wall angle moldings  28 A and  28 C thus creating mark  3  transferred from the floor onto wall angle molding  28 A and mark  4  transferred from the floor onto wall angle molding  28 C, control line holder L 60  attached to the right and next to a main tee  82 A (not shown in this view) point one inscribed onto wall angle molding  28 B, control line  80 A pulled and held taut by control line holder R 60  attached to the left and next to a main tee  82 A (not shown in this view) point two inscribed onto wall angle molding  28 C, additional control line holder R 60  attached to the left and next to a cross tee  82 B (not shown in this view) point three inscribed onto wall angle molding  28 A, control line  80 B pulled and held taut by control line holder L 60  attached to the right and next to a cross tee  82 B (not shown in this view) point four inscribed onto wall angle molding  28 C. 
       FIG. 73  is a perspective side view of the third embodiment L 60  in use with two screws  11 A and  11 B seen slightly from the top for use with grids at forty-five degree angles in relation to the walls and comprises a squared side L 60 A, a groove  16  formed within the squared side L 60 A, an angled side L 60 B, a groove  17  formed within the angled side L 60 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a right side L 60 C, a top L 60 D, an aligning side L 60 E aligned to the right of point  1  which is inscribed onto wall angle molding  28 B, a bottom side L 60 F (not fully seen in this view), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top L 60 D to grooves  16  and  17 , thumb screw  11 A screwed into threaded hole  14 C that is applying a clamping force onto a piece of wall angle molding  28 B against the bottom of groove  17 , thumb screw  11 B screwed into threaded hole  14 D that is applying a clamping force onto a piece of main tee  82 A (shown sketched with dashed lines) and wall angle molding  28 B against the bottom of groove  17 , a loop  79  about 31.75 mm. in diameter tied from control line  80 A which is hooked from groove  16  and the top L 60 D, control line  80 A which is wrapped around counter clock wise right side L 60 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  17 , rounded corner  15 C, aligning side L 60 E, rounded corner  15 B, groove  16 , rounded corner  15 A (not seen in this view), right side L 60 C, groove  17 , rounded corner  15 C, and ending running along aligning side L 60 E. 
       FIG. 74  is a perspective side view of the third embodiment R 60  in use with two screws  11 A and  11 B seen slightly from the top for use with grids at forty-five degree angles in relation to the walls and comprises a squared side R 60 A, a groove  16  formed within the squared side R 60 A, an angled side R 60 B, a groove  17  formed within the angled side R 60 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a left side R 60 C (not fully seen in this view), a top R 60 D, an aligning side R 60 E aligned to the left of point  2  which is inscribed onto a piece of wall angle molding  28 C, a bottom side R 60 F (not fully seen in this view), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top R 60 D to grooves  16  and  17 , thumb screw  11 A screwed into threaded hole  14 C that is applying a clamping force onto a piece of wall angle molding  28 C against the bottom of groove  17 , thumb screw  11 B screwed into threaded hole  14 D that is applying a clamping force onto a piece of main tee  82 A (shown sketched with dashed lines) and wall angle molding  28 C against the bottom of groove  17 , control line  80 A which is wrapped around counter clock wise aligning side R 60 E, rounded corner  15 C, groove  17  formed within the angled side R 60 B, rounded corner  15 A (not seen in this view), left side R 60 C (not fully seen in this view), groove  16  formed within the squared side R 60 A, rounded corner  15 B, aligning side R 60 E, rounded corner  15 C, groove  17  formed within the angled side R 60 B, left side R 60 C (not fully seen in this view), pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 A, returned and let hung next to left side R 60 C (not fully seen in this view). 
       FIG. 75  is a perspective side view of additional third embodiment R 60  in use with two screws  11 A and  11 B seen slightly from the top for use with grids at forty-five degree angles in relation to the walls and comprises a squared side R 60 A, a groove  16  formed within the squared side R 60 A, an angled side R 60 B, a groove  17  formed within the angled side R 60 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a left side R 60 C (not fully seen in this view), a top R 60 D, an aligning side R 60 E aligned to the left of point  3  which is inscribed onto a piece of wall angle molding  28 A, a bottom side R 60 F (not seen), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top R 60 D to grooves  16  and  17 , thumb screw  11 A screwed into threaded hole  14 C that is applying a clamping force onto the piece of wall angle molding  28 A against the bottom of groove  17 , thumb screw  11 B screwed into threaded hole  14 D that is applying a clamping force onto a piece of cross tee  82 B (shown sketched with dashed lines) and wall angle molding  28 A against the bottom of groove  17 , a loop  79  about 31.75 mm. in diameter tied from control line  80 B which is hooked from groove  16  and the top R 60 D, control line  80 B which is wrapped around clock wise left side R 60 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  17  formed within the angled side L 60 B, rounded corner  15 C, aligning side R 60 E, rounded corner  15 B, groove  16  formed within the squared side R 60 A, rounded corner  15 A (not seen in this view), left side R 60 C (not fully seen in this view), groove  17  formed within the angled side R 60 B, rounded corner  15 C, and ending running along aligning side R 60 E. 
       FIG. 76  is a perspective side view of additional third embodiment L 60  in use with two screws  11 A and  11 B seen slightly from the top for use with grids at forty-five degree angles in relation to the walls and comprises a squared side L 60 A, a groove  16  formed within the squared side L 60 A, an angled side L 60 B, a groove  17  formed within the angled side L 60 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by grooves  16  and  17 , a right side L 60 C (not fully seen in this view), a top L 60 D, an aligning side L 60 E aligned to the right of point  4  which is inscribed onto a piece of wall angle molding  28 C, a bottom side L 60 F (not fully seen in this view), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top L 60 D to grooves  16  and  17 , thumb screw  11 A screwed into threaded hole  14 C that is applying a clamping force onto the piece of wall angle molding  28 C against the bottom of groove  17 , thumb screw  11 B screwed into threaded hole  14 D that is applying a clamping force onto a piece of cross tee  82 B (shown sketched with dashed lines) and wall angle molding  28 C against the bottom of groove  17 , control line  80 B which is wrapped around clock wise aligning side L 60 E, rounded corner  15 C, groove  17  formed within the angled side L 60 B, rounded corner  15 A (not seen in this view), right side L 60 C (not fully seen in this view), groove  16  formed within the squared side L 60 A, rounded corner  15 B, aligning side L 60 E, rounded corner  15 C, groove  17  formed within the angled side L 60 B, right side L 60 C (not fully seen in this view) pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 A, returned and let hung next to right side L 60 C (not fully seen in this view). 
     To enable those skilled in the art to fully understand and practice my new and improved method of installing or setting the control lines, I will proceed to give an example as to how a suspended grid framer can use the control line holders R 60 , L 60 , additional L 60 , and additional R 60  to frame a 609.6 mm.×1219.2 mm. or 2′×4′ 90 degree angle suspended grid:
     1. Referring to  FIGS. 67 through 71  and if you are using either 23.81 mm.×23.81 mm. or 14.29 mm.×23.81 mm. wall angle moldings  28 A,  28 B,  28 C, and  28 D snap chalk lines 25.4 mm. above given finished ceiling height; by doing this you will keep all chalk line marks out of the finished ceiling&#39;s view.   2. Install wall angle moldings  28 A,  28 B,  28 C, and  28 D at prescribed height and label them as such.   3. Layout location of control lines  80 A and  80 B on wall angle moldings  28 A,  28 B,  28 C, and  28 D making sure all the marks are above the finished ceiling so no one will be able to see them.   4. The location of the control line  80 A that runs parallel to the main tee is determined by adding the border dimension plus ½ the thickness of the main tee.   5. Make sure the thumb screws  11 A and  11 B are threaded into holes  14 A and  14 B but not into groove  16 .   6. See  FIG. 68 , control line for main tee  82 A (shown sketched with dash lines): Grab a roll of control line  80 A and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take control line holder R 60  with the thumb screws  11 A and  11 B facing up, next, hook the loop  79  from groove  17  and the top R 60 D, wrap control line  80 A around counter clock wise left side R 60 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  16 , rounded corner  15 B, aligning side R 60 E, rounded corner  15 C, groove  17 , left side R 60 C (not fully seen), rounded corner  15 A, groove  16 , rounded corner  15 B, and ending running along aligning side R 60 E.   7. See  FIG. 68 , go to main tee  82 A (shown sketched with dash lines) point  1  and as you face this point  1  attach control line holder R 60  to your right of this point  1  by first inserting the wall angle molding  28 A into the groove  16  formed within the squared side R 60 A, aligning side R 60 E to your right of point  1 , followed by firmly tightening the thumb screw  11 A.   8. See  FIG. 69 , roll out control line  80 A and go to point  2  for the main tee  82 A (shown sketched with dash lines) inscribed onto wall angle molding  28 B, take control line holder L 60 , wrap the control line  80 A around counter clock wise aligning side L 60 E, rounded corner  15 B, groove  16  formed within the squared side L 60 A, rounded corner  15 A (not seen in this view), right side L 60 C (not fully seen), groove  17 , rounded corner  15 C, aligning side L 60 E, rounded corner  15 B, groove  16  formed within the squared side L 60 A, right side L 60 C (not fully seen).   9. See  FIG. 69 , as you face point  2  for the main tee  82 A (shown sketched with dash lines) attach control line holder L 60  to your left of point  2  by first inserting the wall angle molding  28 B into the groove  16  formed within the squared side L 60 A, aligning side L 60 E to your left of point  2 , followed by firmly tightening the thumb screw  11 A.   10. See  FIG. 69 , the control line  80 A must not be trapped against the groove  16  by the wall angle molding  28 B.   11. See  FIG. 69 , next, with your right hand grab the control line  80 A coming from holder R 60  and pull on it while at the same time with your left hand you pull at the previously wrapped control line  80 A on the holder L 60 , do this until you are satisfied with the tautness of the line, finally, with the line that is on your left hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 A, return the line and let it hang next to right side L 60 C, by using the control line&#39;s  80 A pulling force and wrapping the control line  80 A counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 A and prevents it from becoming loose.   12. To adjust this control line  80 A, first the line must be unwrapped from the screw  11 A to relieve the pulling pressure from the taut control line, second, unscrew the thumb screw  11 A four turns, then move the control line holder L 60  to either side and firmly tighten the screw back, repeat step 11 over again.   13. The location of the control line  80 B that runs perpendicular to the cross tee  82 B (shown sketched with dash lines) is determined by adding the border dimension plus ½ the thickness of the cross tee.   14. See  FIG. 70 , control line for cross tee  82 B (shown sketched with dash lines): Grab a roll of control line  80 B and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take additional control line holder L 60  with the thumb screws  11 A and  11 B facing up, next, hook the loop  79  from groove  17  and the top L 60 D, wrap control line  80 B around clock wise right side L 60 C (not fully seen in this view), rounded corner  15 A (not seen in this view), groove  16 , rounded corner  15 B, aligning side L 60 E, rounded corner  15 C, groove  17 , right side L 60 C (not fully seen), rounded corner  15 A (not seen), groove  16 , rounded corner  15 B, and ending running along aligning side L 60 E.   15. See  FIG. 70 , go to cross tee  82 B (shown sketched with dash lines) point  3  and as you face point  3  attach additional control line holder L 60  to your left of point  3  by first inserting the wall angle molding  28 C into the groove  16  formed within the squared side L 60 A, aligning side L 60 E to your left of point  3 , followed by firmly tightening the thumb screw  11 A (not fully seen).   16. See  FIG. 71 , roll out control line  80 B and go to point  4  for the cross tee  82 B (shown sketched with dash lines) inscribed onto wall angle molding  28 D, take additional control line holder R 60 , wrap the control line  80 B around clock wise aligning side R 60 E, rounded corner  15 B, groove  16  formed within the squared side R 60 A, rounded corner  15 A (not seen in this view), left side R 60 C, groove  17 , rounded corner  15 C, aligning side R 60 E, rounded corner  15 B, groove  16 , left side R 50 C.   17. See  FIG. 71 , as you face point  4  for the cross tee  82 B (shown sketched with dash lines) attach control line holder R 60  to your right of point  4  by first inserting the wall angle molding  28 D into the groove  16  formed within the squared side R 60 A, aligning side R 60 E to your right of point  4 , followed by firmly tightening the thumb screw  11 A.   18. See  FIG. 71 , the control line  80 B must not be trapped against the groove  16  by the wall angle molding  28 D.   19. See  FIG. 71 , next, with your left hand grab the control line  80 B coming from additional holder L 60  and pull on it while at the same time with your right hand you pull at the previously wrapped control line  80 B on the additional holder R 60 , do this until you are satisfied with the tautness of the line, finally, with the line that is on your right hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 A, return the line and let it hang next to left side R 60 C, by using the control line&#39;s  80 B pulling force and wrapping the control line  80 B counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 B and prevents it from becoming loose.   20. To adjust this control line  80 B unwrap the line from the screw  11 A to relieve the pulling pressure from the taut control line  80 B, unscrew the thumb screw  11 A four turns then move the additional control line holder R 60  to either side and firmly tightening the screw back, repeat step 19 over again.   21. You have successfully installed, or set the control lines for a 90 degree angle grid.   22. See  FIG. 68 , as you start framing the 90 degree angle grid and you have the first trimmed to the border dimension main tee  82 A (shown sketched with dash lines) position it between groove  17 , groove  16 , top of wall angle molding  28 A and against the aligning side R 60 E and tighten the thumb screw  11 B thus restricting the movement of the main tee  82 A (shown sketched with dash lines).   23. See  FIG. 70 , as you start framing the 90 degree angle grid and you have the first trimmed to the border dimension cross tee  82 B (shown sketched with dash lines) position it between groove  17 , groove  16 , top of wall angle molding  28 C and against the aligning side L 60 E and tighten the thumb screw  11 B thus restricting the movement of the cross tee  82 B (shown sketched with dash lines).   24. See  FIG. 69 , as you finish framing the 90 degree angle grid and you have the last trimmed to the border dimension main tee  82 A (shown sketched with dash lines) position it between groove  17 , groove  16 , top of wall angle molding  28 B and against the aligning side L 60 E and tighten the thumb screw  11 B thus restricting the movement of the main tee  82 A (shown sketched with dash lines).   25. See  FIG. 71 , as you finish framing the 90 degree angle grid and you have the last trimmed to the border dimension cross tee  82 B (shown sketched with dash lines) position it between groove  17 , groove  16 , top of wall angle molding  28 D and against the aligning side R 60 E and tighten the thumb screw  11 B thus restricting the movement of the cross tee  82 B (shown sketched with dash lines).   

     Using control line holders L 60 , R 60 , additional R 60 , and additional L 60  for 609.6 mm.×609.6 mm. or 2′×2′ suspended-ceiling grids at 45 degree angle:
     1. Referring to  FIGS. 72 through 76  and if you are using either 23.81 mm.×23.81 mm. or 14.29 mm.×23.81 mm. wall angle moldings  28 A,  28 B,  28 C, and  28 D snap chalk lines 25.4 mm. above given finished ceiling height, by doing this you will keep all chalk line marks out of the finished ceiling&#39;s view.   2. Install wall angle moldings  28 A,  28 B,  28 C, and  28 D at prescribed ceiling&#39;s height and label them as such.   3. On the floor of the room establish and snap a chalk line  90 A in the middle of the room, at the center of this line  90 A establish and snap a perpendicular chalk line  90 B making sure it is a perfect 90 degree angle.   4. From this center point where chalk lines  90 A and chalk line  90 B intersect mark graduations of 431.8 mm. in three directions, then, from the marked graduations of 431.8 mm. measure and mark graduations of 863.6 mm. three times.   5. Snap a third chalk line  90 C on the floor joining the last marked graduation of 863.60 mm.   on chalk line  90 A and one last marked graduation of 863.60 mm. on chalk line  90 B extending to wall angle moldings  28 B and  28 C.   6. Snap a fourth chalk line  90 D on the floor joining the last marked graduation of 863.60 mm. on chalk line  90 A and the last opposite marked graduation of 863.60 mm. on chalk line  90 B extending to wall angle moldings  28 A and  28 C.   7. You have created 4 new marks, mark  1 , mark  2 , mark  3 , and mark  4 , transfer these 4 marks from the floor up to the wall moldings  28 B,  28 C,  28 A, and  28 C.   8. Layout location of control lines  80 A and  80 B on wall moldings  28 B,  28 C,  28 A, and  28 C making sure all the marks are above the finished ceiling so no one will be able to see them.   9. The location of the control line  80 A that runs parallel to the main tee  82 A (shown sketched with dash lines) is determined by inscribing ½ the thickness of the main tee parallel and to the right of mark  1  transferred from the floor onto wall angle molding  28 B thus creating point  1 , and parallel and to the left of mark  2  transferred from the floor onto wall angle molding  28 C thus creating point  2 .   10. The location of the control line  80 B that runs parallel to the cross tee  82 B (shown sketched with dash lines) is determined by inscribing ½ the thickness of the cross tee parallel and to the left of mark  3  transferred from the floor onto wall angle molding  28 A thus creating point  3 , and parallel and to the right of mark  4  transferred from the floor onto wall angle molding  28 C thus creating point  4 .   11. See  FIG. 73 , make sure the thumb screws  11 A and  11 B are threaded into holes  14 C and  14 D but not into angled groove  17 .   12. See  FIG. 73 , take a roll of control line  80 A and tie a loop  79  at the end, about 31.75 mm. in diameter, take control line holder L 60  and hook the loop  79  from groove  16  and the top L 60 D, wrap control line  80 A around counter clock wise right side L 60 C (not fully seen), rounded corner  15 A (not seen), groove  17 , rounded corner  15 C, aligning side L 60 E, rounded corner  15 B, groove  16 , rounded corner  15 A (not seen), right side L 60 C, groove  17 , rounded corner  15 C and ending running along the aligning side L 60 E.   13. See  FIG. 73 , go to point  1  inscribed onto wall angle molding  28 B and as you face this main tee  82 A (shown sketched with dash lines) point  1  attach control line holder L 60  to your right of this point  1  by first inserting the wall angle molding  28 B into groove  17  formed within angled side L 60 B, aligning side L 60 E to your right of point  1 , followed by firmly tightening the thumb screw  11 A.   14. See  FIG. 74 , roll out control line  80 A and go to point  2 , take control line holder R 60 , wrap the control line  80 A around counter clock wise aligning side R 60 E, rounded corner  15 C, groove  17  formed within the angled side R 60 B, rounded corner  15 A (not seen), left side R 60 C (not fully seen), groove  16  formed within the squared side R 60 A, rounded corner  15 B, aligning side R 60 E, rounded corner  15 C, groove  17 , and left side R 60 C (not fully seen).   15. See  FIG. 74 , as you face this main tee  82 A (shown sketched with dash lines) point  2  attach control line holder R 60  to your left of this point  2  by first inserting the wall angle molding  28 C into groove  17 , aligning side R 60 E to your left of point  2 , followed by firmly tightening the thumb screw  11 A.   16. See  FIG. 74 , the control line must not be trapped against the groove  17  by the wall angle molding  28 C.   17. See  FIG. 74 , next, with your right hand grab the control line  80 A coming from holder L 60  and pull on it while at the same time with your left hand you pull at the previously wrapped line on holder R 60 , do this until you are satisfied with the tautness of the line, finally, with the line that is on your left hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 A, return the line and let it hang next to left side R 60 C, by using the control line&#39;s  80 A pulling force and wrapping the control line  80 A counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 A and prevents it from becoming loose.   18. See  FIG. 75 , control line for cross tee  82 B (shown sketched with dash lines), grab a roll of control line  80 B and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take additional control line holder R 60  with the thumb screws  11 A and  11 B facing up, next, hook the loop  79  from groove  16  and the top R 60 D, wrap control line  80 B around clock wise left side R 60 C (not fully seen), rounded corner  15 A (not seen), groove  17 , rounded corner  15 C, aligning side R 60 E, rounded corner  15 B, groove  16 , rounded corner  15 A (not seen), left side R 60 C (not fully seen), groove  17 , rounded corner  15 C, and ending running along aligning side R 60 E.   19. See  FIG. 75 , take additional holder R 60  and go to point  3 , and as you face point  3 , attach additional control line holder R 60  to your left of this point  3  by first inserting the wall angle molding  28 A into groove  17 , aligning side R 60 E to your left of point  3 , followed by firmly tightening the thumb screw  11 A.   20. See  FIG. 76 , roll out control line  80 B and go to point  4 , take additional control line holder L 60  and wrap control line  80 B clock wise aligning side L 60 E, rounded corner  15 C, groove  17  formed within the angled side L 60 B, rounded corner  15 A (not seen), right side L 60 C (not fully seen), groove  16 , rounded corner  15 B, aligning side L 60 E, rounded corner  15 C, groove  17  formed within the angled side L 60 B, right side L 60 C (not fully seen).   21. See  FIG. 76 , as you face this cross tee  82 B (shown sketched with dash lines) point  4  attach additional control line holder L 60  to your right of this point  4  by first inserting the wall angle molding  28 C into the groove  17 , aligning side L 60 E to your right of point  4 , followed by firmly tightening the thumb screw  11 A.   22. See  FIG. 76 , the control line  80 B must not be trapped against the groove  17  by the wall angle molding  28 C.   23. See  FIG. 76 , next, with your left hand grab the control line  80 B coming from holder R 60  and pull on it while at the same time with your right hand you pull at the previously wrapped line on holder L 60 , do this until you are satisfied with the tautness of the line, finally, with the line that is on your right hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 A, return the line and let it hang next to right side L 60 C, by using the control line&#39;s  80 B pulling force and wrapping the control line  80 B counter clock wise the remainder top section of the thumb screw  11 A locks the control line  80 B and prevents it from becoming loose.   24. You have set, or installed the control lines for a 45 degree angle grid.   25. See  FIG. 74 , as you start framing the 45 degree angle grid and you have the first trimmed to the border dimension main tee  82 A (shown sketched with dash lines) position it between groove  16 , groove  17 , top of wall angle molding  28 C and against the aligning side R 60 E and tighten the thumb screw  11 B thus restricting the movement of the main tee  82 A (shown sketched with dash lines).   26. See  FIG. 76 , as you start framing the 45 degree angle grid and you have the first trimmed to the border dimension cross tee  82 B (shown sketched with dash lines) position it between groove  16 , groove  17 , top of wall angle molding  28 C and against the aligning side L 60 E and tighten the thumb screw  11 B thus restricting the movement of the cross tee  82 B (shown sketched with dash lines).   27. See  FIG. 73 , as you finish framing the 45 degree angle grid and you have the last trimmed to the border dimension main tee  82 A (shown sketched with dash lines) position it between groove  16 , groove  17 , top of wall angle molding  28 B and against the aligning side L 60 E and tighten the thumb screw  11 B thus restricting the movement of the main tee  82 A (shown sketched with dash lines).   28. See  FIG. 75 , as you finish framing the 45 degree angle grid and you have the last trimmed to the border dimension cross tee  82 B (shown sketched with dash lines) position it between groove  16 , groove  17 , top of wall angle molding  28 A and against the aligning side R 60 E and tighten the thumb screw  11 B thus restricting the movement of the cross tee  82 B (shown sketched with dash lines).   

     DETAILED DESCRIPTION 
     FIGS.  77  Through  110 —Fourth Embodiment 
       FIG. 77  is an exploded perspective view of a fourth embodiment L 70  and R 70  for use with grids at ninety degree angles in relation to the walls seen slightly from the top, control line holder L 70  comprises a squared side L 70 A, a horizontal groove  16  formed within the squared side L 70 A, an angled side L 70 B, a horizontal angled groove  17  (not seen) formed within angled side L 70 B, a group of three rounded inside corners  15 A,  15 B and  15 C formed by horizontal grooves  16  and  17  (rounded corner  15 C not seen), a right side L 70 C, a top L 70 D, an aligning side L 70 E, a bottom side L 70 F (not seen), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top L 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top L 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within vertical groove  18 A and threaded holes  14 A and  14 B comprising a top  19 A, two rounded sides  19 B, a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, a flat bottom  19 E (not fully seen), two compression springs  13 A and  13 B configured to fit within threaded holes  14 A and  14 B, a set screw  11 C configured to be screwed into threaded hole  14 A, a thumb screw  11 D configured to be screwed into threaded hole  14 B, control line holder R 70  comprises a squared side R 70 A, a horizontal groove  16  formed within the squared side R 70 A, an angled side R 70 B, a horizontal angled groove  17  formed within angled side R 70 B (not seen), a group of three rounded inside corners  15 A,  15 B and  15 C formed by grooves  16  and  17  (rounded corner  15 C not seen), a left side R 70 C, a top R 70 D, an aligning side R 70 E, a bottom side R 70 F (not seen), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top R 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top R 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within vertical groove  18 A and threaded holes  14 A and  14 B comprising a top  19 A, two rounded sides  19 B, a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, a flat bottom  19 E (not fully seen), two compression springs  13 A and  13 B configured to fit within threaded holes  14 A and  14 B, a set screw  11 C configured to be screwed into threaded hole  14 A, a thumb screw  11 D configured to be screwed into threaded hole  14 B. 
       FIG. 78  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the top and comprises a top  19 A, two rounded sides  19 B, a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, and a flat bottom  19 E (not fully seen). 
       FIG. 79  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the top and comprises a top  19 A, two rounded sides  19 B, a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  190 , and a flat bottom  19 E (not fully seen). 
       FIG. 80  is an exploded perspective view of the fourth embodiment L 70  and R 70  for use with grids at ninety degree angles in relation to the walls seen slightly from the bottom, control line holder L 70  comprises a squared side L 70 A, a horizontal groove  16  formed within the squared side L 70 A, an angled side L 70 B, a horizontal angled groove  17  (not seen) formed within angled side L 70 B, a group of three rounded inside corners  15 A,  15 B and  15 C formed by horizontal grooves  16  and  17  (rounded corner  15 C not seen), a right side L 70 C, a top L 70 D, an aligning side L 70 E, a bottom side L 70 F, four threaded holes  14 A,  14 B,  14 C (not seen), and  14 D (not seen) formed through top L 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B (not seen) formed through top L 70 D to groove  17  (not seen) and joining threaded holes  14 C (not seen) and  14 D (not seen), an attaching-detaching locking bar  19  configured to fit within vertical groove  18 A and threaded holes  14 A and  14 B comprising a top  19 A, two rounded sides  19 B, a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  190 , a flat bottom  19 E (not fully seen), two compression springs  13 A and  13 B configured to fit within threaded holes  14 A and  14 B, a set screw  11 C configured to be screwed into threaded hole  14 A, a thumb screw  11 D configured to be screwed into threaded hole  14 B, control line holder R 70  comprises a squared side R 70 A, a horizontal groove  16  formed within the squared side R 70 A, an angled side R 70 B, a horizontal angled groove  17  (not seen) formed within angled side R 70 B, a group of three rounded inside corners  15 A,  15 B and  15 C formed by horizontal grooves  16  and  17  (rounded corner  15 C not seen), a left side R 70 C, a top R 70 D (not seen), an aligning side R 70 E, a bottom side R 70 F, four threaded holes  14 A,  14 B,  14 C (not seen), and  14 D (not seen) formed through top R 70 D to horizontal grooves  16  and  17  (not seen), a vertical groove  18 A formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B (not seen) formed through top R 70 D to horizontal groove  17  (not seen) and joining threaded holes  14 C (not seen), and  14 D (not seen), an attaching-detaching locking bar  19  configured to fit within vertical groove  18 A and threaded holes  14 A and  14 B comprising a top  19 A, two rounded sides  19 B, a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, a flat bottom  19 E (not fully seen), two compression springs  13 A and  13 B configured to fit within threaded holes  14 A and  14 B, a set screw  11 C configured to be screwed into threaded hole  14 A, a thumb screw  11 D configured to be screwed into threaded hole  14 B. 
       FIG. 81  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the bottom and comprises a top  19 A (not fully seen), two rounded sides  19 B, a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, and a flat bottom  19 E (not fully seen). 
       FIG. 82  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the bottom and comprises a top  19 A (not fully seen), two rounded sides  19 B, a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, and a flat bottom  19 E (not fully seen). 
       FIG. 83  is an exploded perspective view of the fourth embodiment L 70  and R 70  for use with grids at forty-five degree angles in relation to the walls seen slightly from the top, control line holder L 70  comprises a squared side L 70 A (not fully seen), a horizontal groove  16  formed within the squared side L 70 A (not seen), an angled side L 70 B, a horizontal angled groove  17  formed within angled side L 70 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by horizontal grooves  16  (not seen) and  17 , a right side L 70 C, a top L 70 D, an aligning side L 70 E, a bottom side L 70 F (not seen), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top L 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top L 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within vertical groove  18 B and threaded holes  14 C and  14 D comprising a top  19 A, two rounded sides  19 B (one side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  190 , a flat bottom  19 E (not fully seen), two compression springs  13 A and  13 B configured to fit within threaded holes  14 C and  14 D, a set screw  11 C configured to be screwed into threaded hole  14 C, a thumb screw  11 D configured to be screwed into threaded hole L 40 , control line holder R 70  comprises a squared side R 70 A (not fully seen), a horizontal groove  16  formed within the squared side R 70 A (not seen), an angled side R 70 B, a horizontal angled groove  17  formed within angled side R 70 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by horizontal grooves  16  and  17 , a left side R 70 C, a top R 70 D, an aligning side R 70 E, a bottom side R 70 F (not seen), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top R 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top R 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within vertical groove  18 B and threaded holes  14 C and  14 D comprising a top  19 A, two rounded sides  19 B (one rounded side  198  is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  190 , a flat bottom  19 E (not fully seen), two compression springs  13 A and  13 B configured to fit within threaded holes  14 C and  14 D, a set screw  11 C configured to be screwed into threaded hole  14 C, a thumb screw  11 D configured to be screwed into threaded hole  14 D. 
       FIG. 84  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the top and comprises a top  19 A, two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, and a flat bottom  19 E (not fully seen). 
       FIG. 85  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the top and comprises a top  19 A, two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, and a flat bottom  19 E (not fully seen). 
       FIG. 86  is an exploded perspective view of the fourth embodiment L 70  and R 70  for use with grids at forty-five degree angles in relation to the walls seen slightly from the bottom, control line holder L 70  comprises a squared side L 70 A (not fully seen), a horizontal groove  16  formed within the squared side L 70 A (not seen), an angled side L 70 B, a horizontal angled groove  17  formed within angled side L 70 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by horizontal grooves  16  and  17 , a right side L 70 C, a top L 70 D (not seen), an aligning side L 70 E, a bottom side L 70 F, four threaded holes  14 A (not seen),  14 B (not seen),  14 C and  14 D formed through top L 70 D (not seen) to horizontal grooves  16  and  17 , a vertical groove  18 A (not seen) formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B (not seen), a vertical groove  18 B formed through top L 70 D to groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within groove  18 B and threaded holes  14 C and  14 D comprising a top  19 A (not fully seen), two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, a flat bottom  19 E, two compression springs  13 A and  13 B configured to fit within threaded holes  14 C and  14 D, a set screw  11 C configured to be screwed into threaded hole  14 C, a thumb screw  11 D configured to be screwed into threaded hole  14 D, control line holder R 70  comprises a squared side R 70 A (not fully seen), a horizontal groove  16  formed within the squared side R 70 A (not seen), an angled side R 70 B, a horizontal angled groove  17  formed within angled side R 70 B, a group of three rounded inside corners  15 A (not seen),  15 B (not seen) and  15 C formed by horizontal grooves  16  and  17 , a left side R 70 C, a top R 70 D (not seen), an aligning side R 70 E, a bottom side R 70 F, four threaded holes  14 A (not seen),  14 B (not seen),  14 C and  14 D formed through top R 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A (not seen) formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B (not seen), a vertical groove  18 B formed through top R 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within groove  18 B and threaded holes  14 C and  14 D comprising a top  19 A, two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, a flat bottom  19 E, two compression springs  13 A and  13 B configured to fit within threaded holes  14 C and  14 D, a set screw  11 C configured to be screwed into threaded hole  14 C, a thumb screw  11 D configured to be screwed into threaded hole  14 D. 
       FIG. 87  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the bottom and comprises a top  19 A (not fully seen), two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, and a flat bottom  19 E. 
       FIG. 88  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the bottom and comprises a top  19 A (not fully seen), two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, and a flat bottom  19 E. 
       FIG. 89  is an exploded perspective side view of the fourth embodiment L 70  and R 70  for use with grids at forty-five degree angles in relation to the walls seen slightly from the top, control line holder L 70  comprises a squared side L 70 A, a horizontal groove  16  formed within the squared side L 70 A, an angled side L 70 B, a horizontal angled groove  17  formed within angled side L 70 B, a group of three rounded inside corners  15 A (not seen),  15 B and  15 C formed by horizontal grooves  16  and  17 , a right side L 70 C, a top L 70 D, an aligning side L 70 E, a bottom side L 70 F (not seen), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top L 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top L 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within vertical groove  18 B and threaded holes  14 C and  14 D comprising a top  19 A, two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, a flat bottom  19 E (not fully seen), two compression springs  13 A and  13 B configured to fit within threaded holes  14 C and  14 D, a set screw  11 C configured to be screwed into threaded hole  14 C, a thumb screw  11 D configured to be screwed into threaded hole  14 D, control line holder R 70  comprises a squared side R 70 A, a horizontal groove  16  formed within the squared side R 70 A, an angled side R 70 B, a horizontal angled groove  17  formed within angled side R 70 B, a group of three rounded inside corners  15 A (not seen),  15 B and  15 C formed by horizontal grooves  16  and  17 , a left side R 70 C, a top R 70 D, an aligning side R 70 E, a bottom side R 70 F (not seen), four threaded holes  14 A,  14 B,  14 C and  14 D formed through top R 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top R 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within groove  18 B and threaded holes  14 C and  14 D comprising a top  19 A, two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D, a flat bottom  19 E (not fully seen), two compression springs  13 A and  13 B configured to fit within threaded holes  14 C and  14 D, a set screw  11 C configured to be screwed into threaded hole  14 C, a thumb screw  11 D configured to be screwed into threaded hole  14 D. 
       FIG. 90  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the top and comprises a top  19 A, two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C (not fully seen), an unlocking notch  19 D, and a flat bottom  19 E (not fully seen). 
       FIG. 91  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the top and comprises a top  19 A, two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C (not fully seen), an unlocking notch  19 D, and a flat bottom  19 E (not fully seen). 
       FIG. 92  is an exploded perspective side view of the fourth embodiment L 70  and R 70  for use with grids at forty-five degree angles in relation to the walls seen slightly from the bottom, control line holder L 70  comprises a squared side L 70 A, a horizontal groove  16  formed within the squared side L 70 A, an angled side L 70 B, a horizontal angled groove  17  formed within angled side L 70 B, a group of three rounded inside corners  15 A (not seen),  15 B and  15 C formed by horizontal grooves  16  and  17 , a right side L 70 C, a top L 70 D (not seen), an aligning side L 70 E, a bottom side L 70 F, four threaded holes  14 A (not seen),  14 B,  14 C (not seen), and  14 D formed through top L 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A (not fully seen) formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A (not seen) and  14 B, a vertical groove  18 B (not seen) formed through top L 70 D to horizontal groove  17  and joining threaded holes  14 C (not seen) and  14 D, an attaching-detaching locking bar  19  configured to fit within groove  18 B and threaded holes  14 C and  14 D comprising a top  19 A (not fully seen), two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C (not fully seen), an unlocking notch  19 D, a flat bottom  19 E, two compression springs  13 A and  13 B configured to fit within threaded holes  14 C (not seen) and  14 D, a set screw  11 C configured to be screwed into threaded hole  14 C, a thumb screw  11 D configured to be screwed into threaded hole  14 D, control line holder R 70  comprises a squared side R 70 A, a horizontal groove  16  formed within the squared side R 70 A, an angled side R 70 B, a horizontal angled groove  17  formed within angled side R 70 B, a group of three rounded inside corners  15 A (not seen),  15 B and  15 C formed by horizontal grooves  16  and  17 , a left side R 70 C, a top R 70 D (not seen), an aligning side R 70 E, a bottom side R 70 F, four threaded holes  14 A (not seen),  14 B,  14 C (not seen) and  14 D formed through top R 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A (not fully seen) formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B (not seen) formed through top R 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within vertical groove  18 B and threaded holes  14 C and  14 D comprising a top  19 A (not fully seen), two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  190 , a flat bottom  19 E, two compression springs  13 A and  13 B configured to fit within threaded holes  14 C and  14 D, a set screw  11 C configured to be screwed into threaded hole  14 C, a thumb screw  11 D configured to be screwed into threaded hole  14 D. 
       FIG. 93  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the bottom and comprises a top  19 A (not fully seen), two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C (not fully seen), an unlocking notch  19 D, and a flat bottom  19 E. 
       FIG. 94  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the bottom and comprises a top  19 A (not fully seen), two rounded sides  19 B (one rounded side  19 B is not fully seen), a rounded wall angle molding depressed locking actuator side  19 C (not fully seen), an unlocking notch  19 D, and a flat bottom  19 E. 
       FIG. 95  is an exploded perspective side view of the fourth embodiment L 70  and R 70  for use with grids at ninety degree angles in relation to the walls seen slightly from the top, control line holder L 70  comprises a squared side L 70 A, a horizontal groove  16  formed within the squared side L 70 A, an angled side L 70 B, a horizontal angled groove  17  formed within angled side L 70 B, a group of three rounded inside corners  15 A,  15 B (not seen) and  15 C (not seen), formed by horizontal grooves  16  and  17 , a right side L 70 C, a top L 70 D, an aligning side L 70 E, a bottom side L 70 F (not seen), four threaded holes  14 A,  14 B,  14 C, and  14 D formed through top L 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top L 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within vertical groove  18 A and threaded holes  14 A and  14 B comprising a top  19 A, two rounded sides  19 B (one rounded side  19 B is not seen), a rounded wall angle molding depressed locking actuator side  19 C (not fully seen), an unlocking notch  19 D (not fully seen), a flat bottom  19 E (not seen), two compression springs  13 A and  13 B configured to fit within threaded holes  14 A and  14 B, a set screw  11 C configured to be screwed into threaded hole  14 A, a thumb screw  11 D configured to be screwed into threaded hole  14 B, control line holder R 70  comprises a squared side R 70 A, a horizontal groove  16  formed within the squared side R 70 A, an angled side R 70 B, a horizontal angled groove  17  formed within angled side R 70 B, a group of three rounded inside corners  15 A,  15 B (not seen) and  15 C (not seen), formed by horizontal grooves  16  and  17 , a left side R 70 C, a top R 70 D, an aligning side R 70 E, a bottom side R 70 F (not seen), four threaded holes  14 A,  14 B,  14 C, and  14 D formed through top R 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top R 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within vertical groove  18 A and threaded holes  14 A and  14 B comprising a top  19 A, two rounded sides  19 B (one rounded side  19 B is not seen), a rounded wall angle molding depressed locking actuator side  19 C (not fully seen), an unlocking notch  19 D (not fully seen), a flat bottom  19 E (not seen), two compression springs  13 A and  13 B configured to fit within threaded holes  14 A and  14 B, a set screw  11 C configured to be screwed into threaded hole  14 A, a thumb screw  11 D configured to be screwed into threaded hole  14 B. 
       FIG. 96  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the top and comprises a top  19 A, two rounded sides  19 B (one rounded side  19 B is not seen), a rounded wall angle molding depressed locking actuator side  19 C (not fully seen), an unlocking notch  19 D (not fully seen), and a flat bottom  19 E (not seen). 
       FIG. 97  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the top and comprises a top  19 A, two rounded sides  19 B (one rounded side  19 B is not seen), a rounded wall angle molding depressed locking actuator side  19 C (not fully seen), an unlocking notch  19 D (not fully seen), and a flat bottom  19 E (not seen). 
       FIG. 98  is an exploded perspective side view of the fourth embodiment L 70  and R 70  for use with grids at ninety degree angles in relation to the walls seen slightly from the bottom, control line holder L 70  comprises a squared side L 70 A, a horizontal groove  16  formed within the squared side L 70 A, an angled side L 70 B, a horizontal angled groove  17  formed within angled side L 70 B, a group of three rounded inside corners  15 A,  15 B (not seen), and  15 C (not seen), formed by horizontal grooves  16  and  17 , a right side L 70 C, a top L 70 D (not seen), an aligning side L 70 E, a bottom side L 70 F, four threaded holes  14 A,  14 B (not seen),  14 C, and  14 D formed through top L 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A (not fully seen) formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B (not seen), a vertical groove  18 B formed through top L 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within vertical groove  18 A and threaded holes  14 A and  14 B comprising a top  19 A (not seen), two rounded sides  19 B (one rounded side  19 B is not seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D (not fully seen), a flat bottom  19 E, two compression springs  13 A and  13 B configured to fit within threaded holes  14 A and  14 B, a set screw  11 C configured to be screwed into threaded hole  14 A, a thumb screw  11 D configured to be screwed into threaded hole  14 B, control line holder R 70  comprises a squared side R 70 A, a horizontal groove  16  formed within the squared side R 70 A, an angled side R 70 B, a horizontal angled groove  17  formed within angled side R 70 B, a group of three rounded inside corners  15 A,  15 B (not seen), and  15 C (not seen) formed by horizontal grooves  16  and  17 , a left side R 70 C, a top R 70 D (not seen), an aligning side R 70 E, a bottom side R 70 F, four threaded holes  14 A,  14 B (not seen),  14 C, and  14 D formed through top R 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A (not fully seen) formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top R 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  configured to fit within vertical groove  18 A and threaded holes  14 A and  14 B comprising a top  19 A (not seen), two rounded sides  19 B (one rounded side  19 B is not seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D (not fully seen), a flat bottom  19 E, two compression springs  13 A and  13 B configured to fit within threaded holes  14 A and  14 B, a set screw  11 C configured to be screwed into threaded hole  14 A, a thumb screw  11 D configured to be screwed into threaded hole  14 B. 
       FIG. 99  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the bottom and comprises a top  19 A (not fully seen), two rounded sides  19 B (one rounded side  19 B is not seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D (not fully seen), and a flat bottom  19 E. 
       FIG. 100  is a perspective view of a three times enlarged attaching-detaching locking bar  19  seen slightly from the bottom and comprises a top  19 A (not fully seen), two rounded sides  19 B (one rounded side  19 B is not seen), a rounded wall angle molding depressed locking actuator side  19 C, an unlocking notch  19 D (not fully seen), and a flat bottom  19 E. 
       FIG. 101  is a perspective top view of embodiment R 70 , L 70 , additional L 70 , and additional R 70  in use for grids at ninety degree angles in relation to the walls and comprises control line holder R 70  attached to the right and next to a main tee  82 A (not shown in this view) laid out mark or point one inscribed onto wall angle molding  28 A, control line  80 A pulled and held taut by control line holder L 70  attached to the left and next to a main tee  82 A (not shown in this view) laid out mark or point two inscribed onto wall angle molding  28 B, additional control line holder L 70  attached to the left and next to a cross tee  82 B (not shown in this view) laid out mark or point three inscribed onto wall angle molding  28 C, control line  80 B pulled and held taut by additional control line holder R 70  attached to the right and next to a cross tee  82 B (not shown in this view) laid out mark or point four inscribed onto wall angle molding  28 D. 
       FIG. 102  is an assembled perspective side view of the fourth embodiment R 70  in use for grids at ninety degree angles in relation to the walls seen slightly from the top, and comprises a squared side R 70 A, a horizontal groove  16  formed within the squared side R 70 A, an angled side R 70 B, a horizontal angled groove  17  formed within the angled side R 70 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by horizontal grooves  16  and  17 , a left side R 70 C, a top R 70 D, an aligning side R 70 E aligned to the right of point  1  which is inscribed onto wall angle molding  28 A, a bottom side R 70 F (not seen), four threaded holes  14 A (not seen),  14 B,  14 C, and  14 D formed through top R 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A (not seen) formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A (not seen) and  14 B, a vertical groove  18 B formed through top R 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  (reference number not seen), rounded side  19 B, and rounded wall angle molding depressed locking actuator side  19 C (not fully seen) inserted into vertical groove  18 A, threaded hole  14 A and threaded hole  14 B and applying a clamping force onto wall angle molding  28 A against the bottom of horizontal groove  16 , a compression spring  13 A (not seen) inserted into threaded hole  14 A (not seen) and compressed by set screw  11 C screwed into threaded hole  14 A, a compression spring  13 B (not seen) inserted into threaded hole  14 B and compressed by thumb screw  11 D screwed into threaded hole  14 B, a loop  79  about 31.75 mm. in diameter tied from a roll of control line  80 A which is hooked from horizontal groove  17  and the top R 700 , control line  80 A which is wrapped around counter clock wise left side R 70 C (not fully seen in this view), rounded corner  15 A (not seen in this view), horizontal groove  16 , rounded corner  15 B, aligning side R 70 E, rounded corner  15 C, horizontal groove  17 , rounded corner  15 A (not seen in this view), horizontal groove  16 , rounded corner  15 B, and ending running along aligning side R 70 E. 
       FIG. 103  is an assembled perspective side view of the fourth embodiment L 70  in use for grids at ninety degree angles in relation to the walls seen slightly from the top and comprises a squared side L 70 A, a horizontal groove  16  formed within the squared side L 70 A, an angled side L 70 B, a horizontal groove  17  formed within the angled side L 70 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by horizontal grooves  16  and  17 , a right side L 70 C (not fully seen in this view), a top L 70 D, an aligning side L 70 E aligned to the left of point  2  which is inscribed onto wall angle molding  28 B, a bottom side L 70 F (not seen), four threaded holes  14 A (not seen),  14 B,  14 C, and  14 D formed through top L 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A (not seen) formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A (not seen) and  14 B, a vertical groove  18 B formed through top L 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  (reference number not seen), rounded side  19 B, and rounded wall angle molding depressed locking actuator side  19 C (not fully seen) inserted into vertical groove  18 A, threaded hole  14 A and threaded hole  14 B and applying a clamping force onto wall angle molding  28 B against the bottom of groove  16 , a compression spring  13 A (not seen) inserted into threaded hole  14 A (not seen) and compressed by set screw  11 C screwed into threaded hole  14 A, a compression spring  13 B (not seen) inserted into threaded hole  14 B and compressed by thumb screw  11 D screwed into threaded hole  14 B, control line  80 A which is wrapped around counter clock wise aligning side L 70 E, rounded corner  15 B, horizontal groove  16  formed within the squared side L 70 A, rounded corner  15 A (not seen in this view), right side L 70 C (not fully seen in this view), horizontal angled groove  17  formed within the angled side L 70 B, rounded corner  15 C, aligning side L 70 E, rounded corner  15 B, horizontal groove  16  formed within the squared side L 70 A, right side L 70 C (not fully seen in this view), pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 D, returned and let hung next to right side L 70 C (not fully seen in this view). 
       FIG. 104  is an assembled perspective side view of additional embodiment L 70  in use seen slightly from the top for use with grids at ninety degree angles in relation to the walls and comprises a squared side L 70 A, a horizontal groove  16  formed within the squared side L 70 A, an angled side L 70 B, a horizontal angled groove  17  formed within the angled side L 70 B, a group of three rounded inside corners  15 A (not seen in this view),  15 B, and  15 C formed by horizontal grooves  16  and  17 , a right side L 70 C (not fully seen in this view), a top L 70 D, an aligning side L 70 E aligned to the left of point  3  which is inscribed onto wall angle molding  28 C, a bottom side L 70 F (not seen), four threaded holes  14 A (not seen),  14 B,  14 C, and  14 D formed through top L 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A (not seen) formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A (not seen) and  14 B, a vertical groove  18 B formed through top L 70 D to horizontal angled groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  (reference number not seen), rounded side  19 B, and rounded wall angle molding depressed locking actuator side  19 C (not fully seen) inserted into groove  18 A, threaded hole  14 A and threaded hole  14 B and applying a clamping force onto wall angle molding  28 C against the bottom of horizontal groove  16 , a compression spring  13 A (not seen) inserted into threaded hole  14 A (not seen) and compressed by set screw  11 C screwed into threaded hole  14 A, a compression spring  13 B (not seen) inserted into threaded hole  14 B and compressed by thumb screw  11 D screwed into threaded hole  14 B, a loop  79  about 31.75 mm. in diameter tied from control line  80 B which is hooked from horizontal groove  17  and the top L 70 D, control line  80 B which is wrapped around clock wise right side L 70 C (not fully seen in this view), rounded corner  15 A (not seen in this view), horizontal groove  16  formed within the squared side L 70 A, rounded corner  15 B, aligning side L 70 E, rounded corner  15 C, horizontal angled groove  17  formed within the angled side L 70 B, right side L 70 C (not fully seen in this view), rounded corner  15 A (not seen in this view), horizontal groove  16  formed within the squared side L 70 A, rounded corner  15 B, and ending running along aligning side L 70 E. 
       FIG. 105  is an assembled perspective side view of additional embodiment R 70  in use seen slightly from the top for use with grids at ninety degree angles in relation to the walls and comprises a squared side R 70 A, a horizontal groove  16  formed within the squared side R 70 A, an angled side R 70 B, a horizontal angled groove  17  formed within the angled side R 70 B, a group of three rounded inside corners  15 A (not seen in this view),  15 B, and  15 C formed by horizontal grooves  16  and  17 , a left side R 70 C (not fully seen in this view), a top R 70 D, an aligning side R 70 E aligned to the right of point  4  which is inscribed onto wall angle molding  28 D, a bottom side R 70 F (not seen), four threaded holes  14 A (not seen),  14 B,  14 C, and  14 D formed through top R 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A (not seen) formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A (not seen) and  14 B, a vertical groove  18 B formed through top R 70 D to horizontal angled groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  (reference number not seen), rounded side  19 B, and rounded wall angle molding depressed locking actuator side  19 C (not fully seen) inserted into groove  18 A, threaded hole  14 A and threaded hole  14 B and applying a clamping force onto wall angle molding  28 D against the bottom of horizontal groove  16 , a compression spring  13 A (not seen) inserted into threaded hole  14 A (not seen) and compressed by set screw  11 C (not seen) screwed into threaded hole  14 A, a compression spring  13 B (not seen) inserted into threaded hole  14 B and compressed by thumb screw  11 D screwed into threaded hole  14 B, control line  80 B which is wrapped around clock wise aligning side R 70 E, rounded corner  15 B, horizontal groove  16  formed within the squared side R 70 A, rounded corner  15 A (not seen in this view), left side R 70 C (not fully seen in this view), horizontal angled groove  17  formed within the angled side R 70 B, rounded corner  15 C, aligning side R 70 E, rounded corner  15 B, horizontal groove  16  formed within the squared side R 70 A, left side R 70 C (not fully seen in this view), pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 D, returned and let hung next to left side R 70 C (not fully seen in this view). 
       FIG. 106  is a perspective top view of embodiment L 70 , R 70 , additional R 70 , and additional L 70  in use for grids at forty-five degree angles in relation to the walls (not shown) and comprises a chalk line  90 A snapped on the floor in the middle of the room, a chalk line  90 B snapped on the floor in the center of and perpendicular to chalk line  90 A, graduations marked in one direction on chalk line  90 A starting from where chalk line  90 A and chalk line  90 B intersect are 431.80 mm. followed by three times graduations of 863.60 mm., graduations marked in opposite directions on chalk line  90 B starting from where chalk line  90 B and  90 A intersect are 431.80 mm. followed by three times graduations of 863.60 mm., a chalk line  90 C snapped on the floor and joining the last marked graduation of 863.60 mm. on chalk line  90 A and one last marked graduation of 863.60 mm. on chalk line  90 B and extending to wall angle moldings  28 B and  28 C thus creating mark  1  transferred from the floor onto wall angle molding  28 B and mark  2  transferred from the floor onto wall angle molding  28 C, a chalk line  90 D snapped on the floor and joining the last marked graduation of 863.60 mm. on chalk line  90 A and one opposite last marked graduation of 863.60 mm. on chalk line  90 B and extending to wall angle moldings  28 A and  28 C thus creating mark  3  transferred from the floor onto wall angle molding  28 A and mark  4  transferred from the floor onto wall angle molding  28 C, control line holder L 70  attached to the right and next to a main tee  82 A (not shown in this view) point one inscribed onto wall angle molding  28 B, control line  80 A pulled and held taut by control line holder R 70  attached to the left and next to a main tee  82 A (not shown in this view) point two inscribed onto wall angle molding  28 C, additional control line holder R 70  attached to the left and next to a cross tee  82 B (not shown in this view) point three inscribed onto wall angle molding  28 A, control line  80 B pulled and held taut by additional control line holder L 70  attached to the right and next to a cross tee  82 B (not shown in this view) point four inscribed onto wall angle molding  28 C. 
       FIG. 107  is an assembled perspective side view of the fourth embodiment L 70  in use for grids at forty-five degree angles in relation to the walls seen slightly from the top and comprises a squared side L 70 A, a horizontal groove  16  formed within the squared side L 70 A, an angled side L 70 B, a horizontal angled groove  17  formed within the angled side L 70 B, a group of three rounded corners  15 A (not seen in this view),  15 B, and  15 C formed by horizontal grooves  16  and  17 , a right side L 70 C, a top L 70 D, an aligning side L 70 E aligned to the right of point  1  which is inscribed onto wall angle molding  28 B, a bottom side L 70 F (not fully seen in this view), four threaded holes  14 A,  14 B,  14 C, and  14 D formed through top L 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top L 70 D to horizontal angled groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  (reference number not seen), rounded side  19 B, and rounded wall angle molding depressed locking actuator side  19 C (not fully seen) inserted into groove  18 B, threaded hole  14 C and threaded hole  14 D and applying a clamping force onto wall angle molding  28 B against the bottom of horizontal angled groove  17 , a compression spring  13 A (not seen) inserted into threaded hole  14 C and compressed by set screw  11 C screwed into threaded hole  14 C, a compression spring  13 B (not seen) inserted into threaded hole  14 D and compressed by thumb screw  11 D screwed into threaded hole  14 D, a loop  79  about 31.75 mm. in diameter tied from control line  80 A which is hooked from horizontal groove  16  and the top L 70 D, control line  80 A which is wrapped around counter clock wise right side L 70 C (not fully seen in this view), rounded corner  15 A (not seen in this view), horizontal angled groove  17 , rounded corner  15 C, aligning side L 70 E, rounded corner  15 B, horizontal groove  16 , rounded corner  15 A (not seen in this view), horizontal angled groove  17 , rounded corner  15 C, and ending running along aligning side L 70 E. 
       FIG. 108  is an assembled perspective side view of the fourth embodiment R 70  in use for grids at forty-five degree angles in relation to the walls seen slightly from the top and comprises a squared side R 70 A, a horizontal groove  16  formed within the squared side R 70 A, an angled side R 70 B, a horizontal angled groove  17  formed within the angled side R 70 B, a group of three rounded inside corners  15 A (not seen in this view),  15 B, and  15 C formed by horizontal grooves  16  and  17 , a left side R 70 C (not fully seen in this view), a top R 70 D, an aligning side R 70 E aligned to the left of point  2  which is inscribed onto a piece of wall angle molding  28 C, a bottom side R 70 F (not fully seen in this view), four threaded holes  14 A,  14 B,  14 C, and  14 D formed through top R 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top R 70 D to horizontal groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  (reference number not seen), rounded side  19 B, and rounded wall angle molding depressed locking actuator side  19 C (not fully seen) inserted into vertical groove  18 B, threaded hole  14 C and threaded hole  14 D and applying a clamping force onto wall angle molding  28 C against the bottom of groove  17 , a compression spring  13 A (not seen) inserted into threaded hole  14 C (not seen) and compressed by set screw  11 C screwed into threaded hole  14 C, a compression spring  13 B (not seen) inserted into threaded hole  14 D and compressed by thumb screw  11 D screwed into threaded hole  14 D, control line  80 A which is wrapped around counter clock wise aligning side R 70 E, rounded corner  15 C, horizontal angled groove  17  formed within the angled side R 70 B, rounded corner  15 A (not seen in this view), left side R 70 C (not fully seen in this view), horizontal groove  16  formed within the squared side R 70 A, rounded corner  15 B, aligning side R 70 E, rounded corner  15 C, horizontal angled groove  17  formed within the angled side R 70 B, left side R 70 C (not fully seen in this view), pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 D, returned and let hung next to left side R 70 C (not fully seen in this view). 
       FIG. 109  is an assembled perspective side view of additional embodiment R 70  in use seen slightly from the top for use with grids at forty-five degree angles in relation to the walls and comprises a squared side R 70 A, a horizontal groove  16  formed within the squared side R 70 A, an angled side R 70 B, a horizontal angled groove  17  formed within the angled side R 70 B, a group of three rounded inside corners  15 A (not seen in this view),  15 B, and  15 C formed by horizontal grooves  16  and  17 , a left side R 70 C (not fully seen in this view), a top R 70 D, an aligning side R 70 E aligned to the left of point  3  which is inscribed onto a piece of wall angle molding  28 A, a bottom side R 70 F (not seen), four threaded holes  14 A,  14 B,  14 C, and  14 D formed through top R 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top R 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top R 70 D to horizontal angled groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  (reference number not seen), rounded side  19 B, and rounded wall angle molding depressed locking actuator side  19 C (not fully seen) inserted into groove  18 B, threaded hole  14 C and threaded hole  14 D and applying a clamping force onto wall angle molding  28 A against the bottom of horizontal angled groove  17 , a compression spring  13 A (not seen) inserted into threaded hole  14 C (not seen) and compressed by set screw  11 C screwed into threaded hole  14 C, a compression spring  13 B (not seen) inserted into threaded hole  14 D and compressed by thumb screw  11 D screwed into threaded hole  14 D, a loop  79  about 31.75 mm. in diameter tied from control line  80 B which is hooked from horizontal groove  16  and the top R 70 D, control line  80 B which is wrapped around clock wise left side R 70 C (not fully seen in this view), rounded corner  15 A (not seen in this view), horizontal angled groove  17  formed within the angled side R 70 B, rounded corner  15 C, aligning side R 70 E, rounded corner  15 B, horizontal groove  16  formed within the squared side R 70 A, rounded corner  15 A (not seen in this view), left side R 70 C (not fully seen in this view), horizontal angled groove  17  formed within the angled side R 70 B, rounded corner  15 C, and ending running along aligning side R 70 E. 
       FIG. 110  is an assembled perspective side view of additional embodiment L 70  in use seen slightly from the top for use with grids at forty-five degree angles in relation to the walls and comprises a squared side L 70 A, a horizontal groove  16  formed within the squared side L 70 A, an angled side L 70 B, a horizontal angled groove  17  formed within the angled side L 70 B, a group of three rounded inside corners  15 A (not seen in this view),  15 B, and  15 C formed by horizontal grooves  16  and  17 , a right side L 70 C (not fully seen in this view), a top L 70 D, an aligning side L 70 E aligned to the right of point  4  which is inscribed onto a piece of wall angle molding  28 C, a bottom side L 70 F (not fully seen in this view), four threaded holes  14 A,  14 B,  14 C, and  14 D formed through top L 70 D to horizontal grooves  16  and  17 , a vertical groove  18 A formed through top L 70 D to horizontal groove  16  and joining threaded holes  14 A and  14 B, a vertical groove  18 B formed through top L 70 D to horizontal angled groove  17  and joining threaded holes  14 C and  14 D, an attaching-detaching locking bar  19  (reference number not seen), rounded side  19 B, and rounded wall angle molding depressed locking actuator side  19 C (not fully seen) inserted into groove  18 B, threaded hole  14 C and threaded hole  14 D and applying a clamping force onto wall angle molding  28 C against the bottom of horizontal angled groove  17 , a compression spring  13 A (not seen) inserted into threaded hole  14 C and compressed by set screw  11 C screwed into threaded hole  14 C, a compression spring  13 B (not seen) inserted into threaded hole  14 D and compressed by thumb screw  11 D screwed into threaded hole  14 D, control line  80 B which is wrapped around clock wise aligning side L 70 E, rounded corner  15 C, horizontal angled groove  17  formed within the angled side L 70 B, rounded corner  15 A (not seen in this view), right side L 70 C (not fully seen in this view), horizontal groove  16  formed within the squared side L 70 A, rounded corner  15 B, aligning side L 70 E, rounded corner  15 C, horizontal angled groove  17  formed within the angled side L 70 B, right side L 70 C (not fully seen in this view) pulled taut and wrapped around counter clock wise five times the remainder top section of the thumb screw  11 D, returned and let hung next to right side L 70 C (not fully seen in this view). 
     To enable those skilled in the art to fully understand and practice my new and improved method of installing or setting the control lines, I will proceed to give an example as to how a suspended grid framer can use the control line holders R 70 , L 70 , additional L 70 , and additional R 70  to frame a 609.6 mm.×1219.2 mm. or 2′×4′ 90 degree angle suspended grid:
     1. Referring to  FIGS. 101 through 105  and if you are using either 23.81 mm.×23.81 mm. or 14.29 mm.×23.81 mm. wall angle moldings  28 A,  28 B,  28 C, and  28 D snap chalk lines 25.4 mm. above given finished ceiling height, by doing this you will keep all chalk line marks out of the finished ceiling&#39;s view.   2. Install wall angle moldings  28 A,  28 B,  28 C, and  28 D at prescribed height and label them as such.   3. Layout location of control lines  80 A and  80 B on wall angle moldings  28 A,  28 B,  28 C, and  28 D making sure all the marks are above the finished ceiling so no one will be able to see them.   4. The location of the control line  80 A that runs parallel to the main tee is determined by adding the border dimension plus&#39; the thickness of the main tee.   5. See  FIG. 102 , control line for main tee  82 A (not shown): Grab a roll of control line  80 A and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take control line holder R 70  with the set screw  11 C, and thumb screw  11 D facing up, next, hook the loop  79  from horizontal groove  17  and the top R 70 D wrap control line  80 A around counter clock wise left side R 70 C (not fully seen), rounded corner  15 A (not seen), horizontal groove  16 , rounded corner  15 B, aligning side R 70 E, rounded corner  15 C, horizontal groove  17 , rounded corner  15 A (not seen), horizontal groove  16 , rounded corner  15 B, and ending running along aligning side R 70 E.   6. See  FIG. 102 , go to main tee  82 A (not shown) laid out mark or point  1  inscribed onto wall angle molding  28 A and as you face this laid out mark attach control line holder R 70  to your right of this laid out mark or point  1  by first aligning side R 70 E to your right of point  1 , inserting the wall angle molding  28 A into horizontal groove  16  formed within the squared side R 70 A accomplish this by applying pushing force to the rounded wall angle molding locking actuator side  19 C (not fully seen) with the wall angle molding  28 A.   7. As you face control line holder R 70  and if you need to detach it you need to first relieve the pulling force from the taut control line, then you have to pull it and turn it to your left at the same time thus actuating unlocking notch  190  and detaching control line holder R 70  off the wall angle molding  28 A.   8. See  FIG. 103 , roll out control line  80 A and go to the other laid out mark or point  2  for the main tee  82 A (not shown) inscribed onto wall angle molding  28 B, take control line holder L 70 , wrap the control line  80 A around counter clock wise aligning side L 70 E, rounded corner  15 B, horizontal groove  16  formed within the squared side L 70 A, rounded corner  15 A (not seen), right side L 70 C (not fully seen in this view), horizontal groove  17  formed within the angled side L 70 B, rounded corner  15 C, aligning side L 70 E, rounded corner  15 B, horizontal groove  16  formed within the squared side L 70 A, and right side L 70 C (not fully seen in this view).   9. See  FIG. 103 , as you face the laid out mark or point  2  for the main tee  82 A (not shown), attach control line holder L 70  to your left of this laid out mark or point  2  by first aligning side L 70 E to your left of point  2 , inserting the wall angle molding  28 B into horizontal groove  16  formed within the squared side L 70 A accomplish this by applying pushing force to the rounded wall angle molding locking actuator side  19 C (not fully seen) with the wall angle molding  28 B.   10. See  FIG. 103 , the control line  80 A must not be trapped against the groove  16  by the wall angle molding  28 B.   11. See  FIG. 103 , next, with your right hand grab the control line  80 A coming from holder R 70  and pull on it while at the same time with your left hand you pull at the previously wrapped control line  80 A on the holder L 70 , do this until you are satisfied with the tautness of the line, finally with the line that is on your left hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 D, return the line and let it hang next to right side L 70 C (not fully seen), by using the control line&#39;s  80 A pulling force and wrapping the control line  80 A counter clock wise the remainder top section of the thumb screw  11 D locks the control line  80 A and prevents it from becoming loose.   12. To adjust this control line  80 A, first unwrap the line from the screw  11 D to relieve the pulling pressure from the taut control line, second, move the control line holder L 70  to either side and repeat step 11 over again.   13. As you face control line holder L 70  and if you need to detach it you need to first relieve the pulling force from the taut control line, then you have to pull it and turn it to your right at the same time thus actuating unlocking notch  19 D and detaching control line holder L 70  off the wall angle molding  28 B.   14. The location of the control line  80 B that runs perpendicular to the main tee is determined by adding the border dimension plus ½ the thickness of the cross tee.   15. See  FIG. 104 , control line for cross tee  82 B (not shown): Grab a roll of control line  80 B and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take additional control line holder L 70  with the set screw  11 C and the thumb screw  11 D facing up, next, hook the loop  79  from horizontal groove  17  and the top L 70 D, wrap control line  80 B around clock wise right side L 70 C (not fully seen), rounded corner  15 A (not seen), horizontal groove  16 , rounded corner  15 B, aligning side L 70 E, rounded corner  15 C, horizontal groove  17 , right side L 70 C (not fully seen), rounded corner  15 A (not seen), horizontal groove  16 , rounded corner  15 B, and ending running along aligning side L 70 E.   16. See  FIG. 104 , go to cross tee  82 B (not shown) laid out mark or point  3  and as you face this laid out mark attach additional control line holder L 70  to your left of this laid out mark or point  3  by first aligning side L 70 E to your left of point  3 , inserting the wall angle molding  28 C into horizontal groove  16  formed within the squared side L 70 A, accomplish this by applying pushing force to the rounded wall angle molding locking actuator side  19 C (not fully seen) with the wall angle molding  28 C.   17. As you face additional control line holder L 70  and if you need to detach it you need to first relieve the pulling force from the taut control line, then you have to pull it and turn it to your right at the same time thus actuating unlocking notch  19 D and detaching control line holder L 70  off the wall angle molding  28 C.   18. See  FIG. 105 , roll out control line  80 B and go to the other laid out mark or point  4  for the cross tee  82 B (not shown) inscribed onto wall angle molding  28 D, take additional control line holder R 70 , wrap the control line  80 B around clock wise aligning side R 70 E, rounded corner  15 B, horizontal groove  16  formed within the squared side R 70 A, rounded corner  15 A (not seen), left side R 70 C (not fully seen in this view), horizontal groove  17  formed within the angled side R 70 B, rounded corner  15 C, aligning side R 70 E, rounded corner  15 B, horizontal groove  16  formed within the squared side R 70 A, and left side R 70 C (not fully seen in this view).   19. See  FIG. 105 , as you face the laid out mark or point  4  for the cross tee  82 B (not shown), attach control line holder R 70  to your right of this laid out mark or point  4  by first aligning side R 70 E to your right of point  4 , inserting the wall angle molding  28 D into horizontal groove  16  formed within the squared side R 70 A, accomplish this by applying pushing force to the rounded wall angle molding locking actuator side  19 C (not fully seen) with the wall angle molding  28 D.   20. See  FIG. 105 , the control line  80 B must not be trapped against the groove  16  by the wall angle molding  28 D.   21. See  FIG. 105 , next, with your left hand grab the control line  80 B coming from additional holder L 70  and pull on it while at the same time with your right hand you pull at the previously wrapped control line  80 B on the additional holder R 70 , do this until you are satisfied with the tautness of the line, finally, with the line that is on your right hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 D, return the line and let it hang next to left side R 70 C (not fully seen), by using the control line&#39;s  80 B pulling force and wrapping the control line  80 B counter clock wise the remainder top section of the thumb screw  11 D locks the control line  80 B and prevents it from becoming loose.   22. To adjust this control line  80 B unwrap the line from the screw  11 D to relieve the pulling pressure from the taut control line  80 B, move the additional control line holder R 70  to either side and repeat step 21 over again.   23. As you face additional control line holder R 70  and if you need to detach it you need to first relieve the pulling force from the taut control line, then you have to pull it and turn it to your left at the same time thus actuating unlocking notch  19 D and detaching control line holder R 70  off the wall angle molding  28 D.   24. You have successfully installed, or set the control lines for a 90 degree angle grid.   

     Using control line holders L 70 , R 70 , additional R 70 , and additional L 70  for 609.6 mm.×609.6 mm. or 2′×2′ suspended-ceiling grids at 45 degree angle:
     1. Referring to  FIGS. 106 through 110  and if you are using either 23.81 mm.×23.81 mm. or 14.29 mm.×23.81 mm. wall angle moldings  28 A,  28 B,  28 C, and  28 D snap chalk lines 25.4 mm. above given finished ceiling height, by doing this you will keep all chalk line marks out of the finished ceiling&#39;s view.   2. Install wall angle moldings  28 A,  28 B,  28 C, and  28 D at prescribed ceiling&#39;s height and label them as such.   3. On the floor of the room establish and snap a chalk line  90 A in the middle, at the center of this line  90 A establish and snap a perpendicular chalk line  90 B making sure it is a perfect 90 degree angle.   4. From this center point where chalk lines  90 A and chalk line  90 B intersect mark graduations of 431.8 mm. in three directions, then, from the marked graduations of 431.8 mm. measure and mark graduations of 863.6 mm. three times.   5. Snap a third chalk line  90 C on the floor joining the last marked graduation of 863.60 mm. on chalk line  90 A and one last marked graduation of 863.60 mm. on chalk line  90 B extending to wall angle moldings  28 B and  28 C.   6. Snap a fourth chalk line  90 D on the floor joining the last marked graduation of 863.60 mm. on chalk line  90 A and one opposite last marked graduation of 863.60 mm. on chalk line  90 B extending to wall angle moldings  28 A and  28 C.   7. You have created 4 new marks, mark  1 , mark  2 , mark  3 , and mark  4 , transfer these 4 marks from the floor up to the wall moldings  28 B,  28 C,  28 A, and  28 C.   8. Layout location of control lines  80 A and  80 B on wall moldings  28 B,  28 C,  28 A, and  28 C making sure all the marks are above the finished ceiling so no one will be able to see them.   9. The location of the control line  80 A that runs parallel to the main tee  82 A (not shown) is determined by inscribing ½ the thickness of the main tee parallel and to the right of mark  1  transferred from the floor onto wall angle molding  28 B thus creating point  1 , and parallel and to the left of mark  2  transferred from the floor onto wall angle molding  28 C thus creating point  2 .   10. The location of the control line  80 B that runs parallel to the cross tee  82 B (not shown) is determined by inscribing ½ the thickness of the cross tee parallel and to the left of mark  3  transferred from the floor onto wall angle molding  28 A thus creating point  3 , and parallel and to the right of mark  4  transferred from the floor onto wall angle molding  28 C thus creating point  4 .   11. See  FIG. 107 , take a roll of control line  80 A and tie a loop  79  at the end, about 31.75 mm. in diameter, take control line holder L 70  and hook the loop  79  from horizontal groove  16  and the top L 70 D, wrap control line  80 A around counter clock wise right side L 70 C (not fully seen in this view), rounded corner  15 A (not seen in this view), horizontal groove  17 , rounded corner  15 C, aligning side L 70 E, rounded corner  15 B, horizontal groove  16 , rounded corner  15 A (not seen in this view), horizontal groove  17 , rounded corner  15 C, and ending running along aligning side L 70 E.   12. See  FIG. 107 , go to point  1  inscribed onto wall angle molding  28 B and as you face this main tee  82 A (not shown) point  1  attach control line holder L 70  to your right of this point  1  by first aligning side L 70 E to your right of point  1 , inserting the wall angle molding  28 B into horizontal groove  17  formed within angled side L 70 B, accomplish this by applying pushing force to the rounded wall angle molding locking actuator side  19 C (not fully seen) with the wall angle molding  28 B.   13. As you face control line holder L 70  and if you need to detach it you need to first relieve the pulling force from the taut control line, then you have to pull it and turn it to your left at the same time thus actuating unlocking notch  19 D and detaching control line holder L 70  off the wall angle molding  28 B.   14. See  FIG. 108 , roll out control line  80 A and go to point  2 , take control line holder R 70 , wrap the control line  80 A around counter clock wise aligning side R 70 E, rounded corner  15 C, horizontal groove  17  formed within the angled side R 70 B, rounded corner  15 A (not seen), left side R 70 C (not fully seen in this view), horizontal groove  16  formed within the squared side R 70 A, rounded corner  15 B, aligning side R 70 E, rounded corner  15 C, horizontal groove  17  formed within the angled side R 70 B, left side R 70 C (not fully seen in this view).   15. See  FIG. 108 , as you face this main tee  82 A (not shown) point  2  attach control line holder R 70  to your left of this point  2  by first aligning side R 70 E to your left of point  2 , inserting the wall angle molding  28 C into horizontal groove  17  formed within angled side L 70 B, accomplish this by applying pushing force to the rounded wall angle molding locking actuator side  19 C (not fully seen) with the wall angle molding  28 C.   16. See  FIG. 108 , the control line  80 A must not be trapped against the groove  17  by the wall angle molding  28 C.   17. See  FIG. 108 , next, with your right hand grab the control line  80 A coming from holder L 70  and pull on it while at the same time with your left hand you pull at the previously wrapped line on holder R 70 , do this until you are satisfied with the tautness of the line, finally, with the line that is on your left hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 D, return the line and let it hang next to left side R 70 C (not fully seen), by using the control line&#39;s  80 A pulling force and wrapping the control line  80 A counter clock wise the remainder top section of the thumb screw  11 D locks the control line  80 A and prevents it from becoming loose.   18. As you face control line holder R 70  and if you need to detach it you need to first relieve the pulling force from the taut control line, then you have to pull it and turn it to your right at the same time thus actuating unlocking notch  19 D and detaching control line holder R 70  off the wall angle molding  28 C.   19. See  FIG. 109 , control line for cross tee  82 B (not shown): Grab a roll of control line  80 B and tie a loop  79  about 31.75 mm. in diameter at the end, with the other hand take additional control line holder R 70  with the set screw  11 C and thumb screw  11 D facing up, next, hook the loop  79  from horizontal groove  16  and the top R 70 D, wrap control line  80 B around clock wise left side R 70 C (not fully seen), rounded corner  15 A (not seen), horizontal groove  17 , rounded corner  15 C, aligning side R 70 E, rounded corner  15 B, horizontal groove  16 , rounded corner  15 A (not seen), left side R 70 C (not fully seen), horizontal groove  17 , rounded corner  15 C, and ending running along aligning side R 70 E.   20. See  FIG. 109 , take additional holder R 70  and go to point  3  inscribed onto wall angle molding  28 A, and as you face point  3 , attach control line holder R 70  to your left of this point  3  by first aligning side R 70 E to your left of point  3 , inserting the wall angle molding  28 A into horizontal groove  17  formed within angled side R 70 B, accomplish this by applying pushing force to the rounded wall angle molding locking actuator side  19 C (not fully seen) with the wall angle molding  28 A.   21. As you face additional control line holder R 70  and if you need to detach it you need to first relieve the pulling force from the taut control line, then you have to pull it and turn it to your right at the same time thus actuating unlocking notch  19 D and detaching control line holder R 70  off the wall angle molding  28 A.   22. See  FIG. 110 , roll out control line  80 B and go to point  4  inscribed onto wall angle molding  28 C, take control line holder L 70  and wrap control line  80 B clock wise aligning side L 70 E, rounded corner  15 C, horizontal groove  17  formed within the angled side L 70 B, rounded corner  15 A (not seen), right side L 70 C (not fully seen in this view), horizontal groove  16  formed within the squared side L 70 A, rounded corner  15 B, aligning side L 70 E, rounded corner  15 C, horizontal groove  17  formed within the angled side L 70 B, right side L 70 C (not fully seen in this view).   23. See  FIG. 110 , as you face this cross tee  82 B (not shown) point  4  attach control line holder L 70  to your right of this point  4  by first aligning side L 70 E to your right of point  4 , inserting the wall angle molding  28 C into the groove  17  formed within angled side R 70 B accomplish this by applying pushing force to the rounded wall angle molding locking actuator side  19 C (not fully seen) with the wall angle molding  28 C.   24. See  FIG. 110 , the control line  80 B must not be trapped against the groove  17  by the wall angle molding  28 C.   25. See  FIG. 110 , next, with your left hand grab the control line  80 B coming from holder R 70  and pull on it while at the same time with your right hand you pull at the previously wrapped line on holder L 70 , do this until you are satisfied with the tautness of the line, finally, with the line that is on your right hand wrap it around counter clock wise five times the remainder top section of the thumb screw  11 D, return the line and let it hang next to right side L 70 C (not fully seen), by using the control line&#39;s  80 B pulling force and wrapping the control line  80 B counter clock wise the remainder top section of the thumb screw  11 D locks the control line  80 B and prevents it from becoming loose.   26. As you face additional control line holder L 70  and if you need to detach it you need to first relieve the pulling force from the taut control line, then you have to pull it and turn it to your left at the same time thus actuating unlocking notch  19 D and detaching control line holder L 70  off the wall angle molding  28 C.   27. You have set, or installed the control lines for a 45 degree angle grid.   

     All embodiments thus provide novel devices and a method for installing control lines, guide lines or reference strings to control the straightness and squareness of main tees and cross tees when framing a suspended ceiling grid. The above described embodiments are set forth by way of example and are not for the purpose of limiting the present invention. It will be readily apparent to those skilled in the art that obvious modifications, derivations and variations can be made to the embodiments without departing from the scope of the invention. Accordingly, the claims appended hereto should be read in their full scope including any such modifications, derivations and variations.