Abstract:
A rigid, metallic clip and a method for providing hard fastened, anti-racking ceiling and wall construction. A flat, perforated body portion bordering an integral, perforated tab extends downwardly from a junction at the midpoint. A pair of spaced apart and parallel fingers projecting forwardly engage the top plate, snugly resting beneath insulation to temporarily retain clips for screwing. A pair of elongated, reinforcing grooves extending from the clip rear to the junction are convex, so the bottom of the clip flushly mates with the ceiling sheet. The rigid, integral tab projects downwardly at a preferred angle of eighty-seven degrees. Clips positioned on the top plate are fastened by screws that penetrate the tab. The horizontal ceiling sheet can then be screwed to adjoining clips. A sidewall sheet disposed substantially vertically is then screwed to framing. The sheets cover the clip body, and no jagged edges or sharp points remain visible.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     My invention relates generally to construction clips and methods for securing wall or ceiling panels such as sheet rock or wall board during construction. More particularly, the invention relates to metallic construction clips and methods for constructing ceilings in which a support is provided by the clips for edges of abutting panels. Known prior art is classified in U.S. Pat. No. Class 52, Subclasses 285.3, 489, 514, 712, 714, 715, 770, 771, and 777.  
         [0003]     2. Description of the Related Art  
         [0004]     Wall board, sheet rock and gypsum drywall panels commonly used in construction are typically oriented with construction clips or stops and then secured with fasteners such as screws or nails. A wide variety of clips of various configurations and sizes are commercially available for such applications. Known clips are fabricated from metal, preferably steel, and plastic.  
         [0005]     During ceiling construction, various clips or stops (i.e., “Gyp-clips”) are used to support drywall or wood paneling at corners and to replace traditional wood blocking at top plates, end walls, and corners. Many known clips attach at the edges of abutting wallboards, for example, to fasten and align the various pieces. Many clips attach directly to the framework such as studs, joists, ceiling headers, or top plates. The purpose of such clips is to facilitate the rapid and accurate assembly of walls and ceilings. Modern construction clips of this nature eliminate “U-Boxes”, partition tees, and backup lumber at ceiling joists, and make two-stud corners possible, replacing common three and four-stud corners. At top plates, drywall fasteners reduce call backs for ceiling and partition separating from the truss uplift. Manufacturers offer fasteners with different installation techniques, characteristics, and materials.  
         [0006]     Drywall fasteners include both “clips” and “stops.” A drywall stop performs a backing function for abutting panels, but stops are not “hard fastened” to both panels. Stops traditionally produce “free floating” corners. In such an arrangement, edges of the horizontally oriented ceiling panel, for example, will rest upon vertical edges of horizontal panels, without being separately screwed or nailed to any adjacent structure. Clips, on the other hand, are usually mechanically secured to both the wallboard panels and the adjacent framework. Edges of ceiling panels are not left “free floating.” Floating corners are best avoided to maintain structural strength, especially in regions subject to earth quakes or hurricanes.  
         [0007]     Two-stud corners not only help plumbers and electricians to snake wires and pipes, they can also contribute to the proper insulation of the structure. Properly configured clips are designed to minimize interference with insulation, so their use reduces thermal energy losses. Clips should not mechanically interfere with uncut insulation behind the studding or top plate regions, and the risk of bare cavities and cold corners must be reduced.  
         [0008]     At least one prior art metal clip is typically fitted onto drywall edges by hand prior to drywall installation. The preinstalled clips aid positioning and manipulation of drywall panels as they are installed over wood or steel framing studs. Because drywall clips are installed to the drywall beforehand, they are said to complicate and change the drywallers&#39; work routine, and therefore they have not been popular, except for drywall repair applications. Clips and plastic stops can be used in conjunction with steel studs, unlike the sheet metal and metal wire drywall stops.  
         [0009]     Stops, like wood blocking, are fastened to structural members before drywall installation. Drywall stops are available in galvanized or sheet metal forms. Plastic and metal wire stops offer several advantages over some sheet metal stops. Noncorrosive plastic stops are usually stapled or nailed to structural wood members like the top plate during ceiling installation. Sharp talons of some metal stops grip the wood and forcibly penetrate it, eliminating the need for a separate screwing step. At two-stud corners, metal and plastic drywall stops are typically installed sixteen inches on center (o.c.) at the top and bottom of the wall. Then the first sheet of drywall is hung against the stops. Plastic stops allow the corners to be hard fastened but some manufacturers recommend leaving the corners floating to accommodate thermally induced expansion and contraction. The second sheet is installed against the first. At top plates, the stops are installed sixteen inches (o.c.) and at all corners and intersections. The drywall is installed with the ceiling panels first, as usual. The metal wire stops are usually installed by hand. However, known stops have several problems. For example, when a stud has a rounded corner, it is difficult to properly install and align the fastener.  
         [0010]     U.S. Pat. No. 3,881,293 issued May 6, 1975 discloses a metallic clip for the construction of wall panels. Inner and outer flanges extending perpendicularly from the body form a receptive channel that embraces the edge of a first panel. The clip has a portion secured to a corner stud. Proper orientation and alignment of a second, perpendicular wall panel secured to a stud is encouraged by the clip.  
         [0011]     Many prior art construction clip designs include parallel, spaced apart portions between which edges of panels are grasped. For example, U.S. Pat. No. 2,351,525 issued Jun. 13, 1944 discloses a clip with which adjoining horizontal and vertical wallboards can be secured that has receptive channels between which panel edges are sandwiched.  
         [0012]     U.S. Pat. No. 2,831,222 issued Apr. 22, 1958 discloses a metal fastener clip whose body forms a tongue-and-groove joint into which a wallboard edge is fastened.  
         [0013]     U.S. Pat. No. 3,881,293 issued May 6, 1975 has integral, spaced apart flanges between which a panel edge is grasped.  
         [0014]     U.S. Pat. No. 4,221,095 issued Sep. 9, 1980 discloses a wall constructed from edge-abutting wallboard panels secured with concealed fasteners that are screwed to adjacent framing elements. U.S. Pat. Nos. 6,725,619 and 6,209,277 form similar channel portions for grasping panel edges.  
         [0015]     Many clips have impaling prongs or projections that forcibly engage and at least penetrate panels or studs. For example, U.S. Pat. No. 4,127,975 issued Dec. 5, 1978 shows a system employing clips for securing sheet rock or gypsum board to the framework. The clips have pointed, piercing elements that forcibly engage panel edges.  
         [0016]     U.S. Pat. No. 3,901,471 issued Aug. 26, 1975 discloses a wallboard bracket with similar projecting prongs for securing the bracket to a support, and a tab bendable to engage the side surface of the wallboard.  
         [0017]     U.S. Pat. No. 4,000,596 issued Jan. 4, 1977 discloses a T-shaped clip for securing wall panels to adjacent frame members that comprises a rigid, pointed tang forced between adjacent frame members, and a spaced-apart, toothed edge that forcibly engages abutting panel edges.  
         [0018]     U.S. Pat. No. 4,467,579 issued Aug. 28, 1984 discloses panel fastener clips for the construction of various panel structures having side-abutting panels, such as wallboards, that include integral penetrating tabs.  
         [0019]     U.S. Pat. No. 5,249,405 issued Oct. 5, 1993 discloses a drywall clip for ceiling construction comprising a piercing end that is driven perpendicularly into a ceiling joist, a supporting tongue, and a striking end.  
         [0020]     U.S. Pat. No. 4,844,651 issued Jul. 4, 1989 discloses a fastening clip having a perpendicular shank terminating in an end that pierces the edge of a wooden panel. U.S. Pat. No. 4,498,272 issued Feb. 12, 1985 discloses a fastener for securing panels comprising a planar base with an impaling flange that extends perpendicularly outwardly and penetrates wallboard panel edges.  
         [0021]     U.S. Pat. No. 4,448,007 issued May 15, 1984 shows a wallboard fastener comprising a flat base, an elongated tongue, and a pair of impaling flanges extending from opposite sides of the tongue that forcibly engage panels during construction.  
         [0022]     U.S. Pat. No. 4,991,373 issued Feb. 12, 1991 discloses a clip for supporting ceiling panels in a suspended ceiling that includes a pair of rearwardly extending prongs for insertion into an edge of frame elements, and an integral bared portion that forcibly penetrates wallboard edges.  
         [0023]     U.S. Pat. No. 4,831,808 issued May 23, 1989 discloses a construction clip for securing wallboard panels to framing members that has integral impaling points that forcibly engage wallboard edges.  
         [0024]     A prior art, metallic drywall stop formerly made by the Simpson Strong Tie Company Inc. has a horizontal portion that engages the top plate in ceiling construction, and an integral, downwardly projecting middle that abuts the top plate sides. A channel separates halves of the upper portion, and in cross section, the device is generally T-shaped. However, there are reinforcement grooves disposed atop the device, that overly, at least in part, the top plate. This can interfere with insulation. Further, the clip is not designed to receive a screw to aid in fastening the ceiling panels; instead, the device encourages the use of floating corners.  
         [0025]     Another stop, formerly marketed by United Steel Products of Minnesota under the trademark “KANT-SAG,” has been in widespread use since the  1980 &#39;s. This metallic design includes a solid metallic top terminating in a central tab, and an integral, downwardly extending middle. A pair of sharp prongs projecting from the middle forcibly engage the wood. During initial dry walling stages, these clips can fall out if inadvertently bumped. Further, with the passage of several years, these clips can be slowly forced out of the wood, weakening the structure. Another disadvantage is that the single, upper tab presents minimal surface area to the top plate, so clip alignment and thus panel “squareness” can be difficult. It is difficult to force the latter clip into flush abutment around the corner region, a factor that is enhanced by the fact that two-by-four&#39;s used in common construction are non-standard, and have rounded edges that do not present a ninety-degree corner. Finally, like other clips discussed above, the “KANT-SAG”design cannot receive a screw to fasten horizontally positioned ceiling panels. Instead, floating corners are used.  
         [0026]     The TECO-brand back-up clip has also been popular since the  1980 &#39;s. It has a pair of short forwardly projecting tabs and a pair of rearwardly projecting tabs. These tabs are too short and they are inappropriately positioned to center and align the clips properly. Further, there is no screw-receptive surface for ceiling panels, and floating corner construction must be employed with such clips.  
         [0027]     There are several disadvantages associated with prior art, metallic ceiling clip designs discussed above. For example, exposed, sharp edges can cause injury to the installers. In some case, portions of conventional clips bend and stick out from the wall, snagging the taping machines. Therefore it should be a design goal for modem clips to remain totally hidden after installation. In many cases, the clip tab is too short for ceiling work; such clips are unsuitable for single top plate ceilings and large truss camber applications.  
         [0028]     Another disadvantage with known designs is that the clips cannot be stacked. Jumbled, irregular packaging means that the clips must be manually removed one at a time from a container, delaying the installer. A modem design criterion requires that suitable construction clips stack neatly and compactly, allowing the drywall hanger to work out of an apron during installation, saving time, reducing costs, and minimizing frustration.  
         [0029]     A plastic clip that is currently used to some extent in the construction industry is described in U.S. Pat. No. 5,581,964, issued Dec. 10, 1996, entitled “Wall Panel Support And Securement Combination.” The invention is described as a nailer device for securing abutting edges of construction panels to a support timber or top plate. An upper, horizontal planar member overlies a portion the top plate. An integral, vertical planar member projects from the horizontal member in the same configuration as the TECO or KANT-SAG clips discussed above. There are contiguous, gapless, elongated corner recesses defined on both sides of the junction between the vertical and horizontal portions. Abutting edges of panels are disposed within the recesses. According to the reference, the clip is fastened to the top plate with nails that penetrate the vertical portion that abuts the top plate side. While the horizontal portion is adapted to receive screws for fastening ceiling panels, the vertical portion must be nailed. Most installers prefer to use relatively high power automatic screw guns during drywall installation. High torque drywall screws often deform plastic clips, and the screw heads can pull through the plastic material. It is easier for installers to carry a minimum of tools, such as their screw guns and the requirement for nailing is burdensome. Further, plastic clips such as the latter require significant reinforcement ribs, and these can physically interfere with insulation bats.  
         [0030]     There are also analogous clips in this art that are used for repairs rather than for original construction. Some clips enable wall boards to be assembled notwithstanding the lack of aligned or abutting wall frame studs. My prior U.S. Pat. Nos. 4,782,642 and 4,995,605 describe systems for repairing holes in wallboard in regions that do not border frame studs. Adjoining wall panels are secured together with a plurality of spaced-apart, metallic clips that provide an edgewise mechanical bond between adjacent panel edges. Installed clips provide a secure mechanical union between the original panel and the repair piece. Each clip has pair of spaced apart, prong-like spring tabs formed on opposite sides to grasp panel edges. Each spring tab includes an integral, upwardly extending vertical portion disposed substantially perpendicularly to the body and an integral, outwardly curved substantially horizontal flange portion. The horizontal flange portion is separated from its vertical companion by a weakened, scored tear edge which permits manual removal of the flange by appropriate bending after clip installation.  
         [0031]     What is needed for ceiling construction is a metal clip that firmly and squarely engages the top plate during ceiling construction, notwithstanding irregularities in the dimensions of two-by-four&#39;s and other frame parts. An ideal clip must firmly seat drywall screws without degradation or breakage. It must be capable of quick installation, while maintaining squareness and proper alignment. After installation, it must not degrade or pull out from the wood over time.  
       BRIEF SUMMARY OF THE INVENTION  
       [0032]     This invention provides an improved, metallic ceiling clip and related methods for assembling wall panels, primarily for ceiling construction.  
         [0033]     The clip preferred clip has a main body portion and a downwardly depending tab, establishing a generally T-shaped profile, both of which are perforated to blindly receive screws. A pair of spaced apart and parallel fingers project forwardly, coplanar with the horizontal clip midsection. The length of these fingers is approximately the same as the clip width. During construction, clips are initially placed upon the framework top plate, with the fingers sliding over the top plate&#39;s upper surface, beneath the insulation layer, to temporarily retain clips in position for subsequent screwing. The geometry of the clip compensates for irregularities in the dimensions of the top plate. A physical gap exists between the fingers. To prevent damage and avoid snags, ends of the fingers, and all corners of the clip body are gently radiused.  
         [0034]     A pair of elongated, parallel reinforcement grooves separate rear side portions of the clip body from a central, perforated portion. The numerous orifices in the central portion enable drywall screws to threadably mount or penetrate the clip. The reinforcement grooves are oriented such that they are convex at the top of the clip, so that the bottom of the clip can flushly mate with the horizontally oriented ceiling sheet that physically contacts it in accordance with the construction method.  
         [0035]     The rigid, integral tab projects substantially perpendicularly downwardly from the clip midsection. In the best mode the tab is angled approximately eighty-seven degrees from the body, rather than being perfectly square. As a result, when the clips are screwed into place against the top plate side, either before or after ceiling sheet installation, clip flexing results in a flush, preferably square abutment with the top plate, notwithstanding the latter&#39;s possible structural irregularities.  
         [0036]     The tab is perforated so fasteners can easily penetrate it. All end corners are radiused and unpointed, and there are no sharp or jagged edges that can interfere with installation or degrade insulation. Furthermore, the preferred configuration makes the clips stackable to minimize shipping and storage volume.  
         [0037]     The preferred ceiling construction method begins by initially placing one or more clips atop the top plate, with the forwardly projecting fingers snugly received beneath the insulation layer. A drywall screw is installed, penetrating the perforated tab to firmly secure the clip to the top plate side. Multiple spaced-apart clips can be installed at selected intervals, usually from sixteen to twenty four inches. When horizontally placed, the ceiling drywall sheet will contact multiple clips. At spaced apart intervals the ceiling sheet can be fastened to the horizontal portions of the multiple clips. Although these clips will be obscured from view by placement of the ceiling sheet, rapid installation is insured by the fact that blind screwing is possible through the clip design. The drywall screws forcibly penetrate the ceiling sheet and further anchor the clips.  
         [0038]     After the ceiling panel is secured at spaced apart intervals to several clips, the sidewall sheet may be moved into a substantially vertical position, perpendicular to the ceiling panel. The vertical wall sheet may then be screwed to the top plate or to various vertical frame members. When properly installed, the clip tab is covered, and no clips remain visible. In other words, with the wall and ceiling sheets properly positioned and securely fastened, the clips will be covered, and no jagged edges or sharp points will be exposed. Conventional drywall finishing steps can then follow, and no portions of the clips must sanded, broken away, or otherwise treated.  
         [0039]     Thus, a basic object of my invention is to provide an improved ceiling panel construction clip and an improved method for constructing ceilings.  
         [0040]     Another basic object is to provide a method and a clip fastener apparatus of the nature described for hard fastening horizontal ceiling panels and abutting wall panels.  
         [0041]     It is also an important object to provide an anti racking system for ceiling and wall construction.  
         [0042]     Another basic object is to provide an improved ceiling clip and method for quickly joining wall and ceiling elements to simplify and speed-up construction.  
         [0043]     A related object is to provide a highly dexterous ceiling clip that can be quickly installed in numerous varieties of construction configurations.  
         [0044]     A related object is to provide a construction clip of the character described whose unique construction adapts it for flush fitting against irregularly shaped top plates or two-by-fours &#39;s used in construction.  
         [0045]     Another fundamental object is to provide a clip of the character described that fits all wall board sizes, i.e., one-half inch wallboard for residential construction, and five-eights inch wallboard code-specified for commercial construction.  
         [0046]     Yet another object is to provide a ceiling construction clip design that eliminates the need for conventional back-up lumber.  
         [0047]     Another important object is to securely hard fasten the corner region of abutting, orthogonal panels during construction, to create a unitized structural corner.  
         [0048]     Thus avoiding floating corners is an important object of my invention.  
         [0049]     Another important object is to provide a metallic ceiling construction clip that conforms to modern building and construction codes and that satisfies state and Federal regulations.  
         [0050]     A further object of my invention is to provide a ceiling construction clip of the character described that temporarily supports the orientation of wallboard as panels are manipulated into position and subsequently oriented prior to screwing during ceiling construction.  
         [0051]     A further object of the present invention is to provide a small and compact clip of unitary construction which is easy, safe, and economical to use.  
         [0052]     A related object is to provide a ceiling construction clip that may be either affixed to the top plate first or ceiling panels first.  
         [0053]     Another basic object is to provide a clip of the character described which is stackable. It is an important feature of my invention that a plurality of clips may be stacked together to minimize volume, which is an important consideration in shipping.  
         [0054]     Another object is to provide a method for fastening ceiling panels which avoids the use of prongs or piercing points that might interfere with or deform insulation.  
         [0055]     A related object to provide a clip that, after installation, has no exposed metal parts. It is a feature of my new clip design that no portions of the clip are exposed after installation, so it is easier for the drywall finisher to complete the job. For example, since there are no exposed metal surfaces, there will be no snagging on the taping machine during finishing.  
         [0056]     A related object is to provide a ceiling construction clip of the character described whose structure avoids sharp prongs or edges, to minimize the chance that installers will be cut or injured.  
         [0057]     These and other objects and advantages of the present invention, along with features of novelty appurtenant thereto, will appear or become apparent in the course of the following descriptive sections.  
     
    
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS  
       [0058]     In the following drawings, which form a part of the specification and which are to be construed in conjunction therewith, and in which like reference numerals have been employed throughout wherever possible to indicate like parts in the various views:  
         [0059]      FIG. 1  is a fragmentary, isometric assembly view illustrating my new ceiling clip and the associated installation method, with portions thereof broken away or shown in section for clarity;  
         [0060]      FIG. 2  is an enlarged, fragmentary, isometric assembly view similar to  FIG. 1 , with portions thereof broken away or shown in section for clarity or omitted for brevity;  
         [0061]      FIG. 3  is an upper rear isometric view of the preferred clip;  
         [0062]      FIG. 4  is a bottom rear isometric view of the preferred clip;  
         [0063]      FIG. 5  is a frontal top isometric view of the preferred clip;  
         [0064]      FIG. 6  is an frontal bottom isometric view of the preferred clip;  
         [0065]      FIG. 7  is a top plan view of the preferred clip;  
         [0066]      FIG. 8  is a bottom plan view of the preferred clip;  
         [0067]      FIG. 9  is a rear elevational view of the preferred clip;  
         [0068]      FIG. 10  is an enlarged, front elevational view of the preferred clip;  
         [0069]      FIG. 11  is a side elevational view of the preferred clip, the opposite side comprising a mirror image; and,  
         [0070]      FIG. 12  is an isometric view of a plurality of clips constructed in accordance with the best mode of the invention, showing how they stack for shipping and storage.  
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0071]     With reference now directed to the appended drawings, my new ceiling construction clip has been generally designated by the reference numeral  20 . Clip  20  is primarily designed for use in conjunction with ceiling construction, but it can be used to hard fasten any junction of orthogonal panels. The primary and preferred purpose of clip  20  is to hard fasten vertical wall panels with horizontal ceiling panels adjacent construction framework (i.e., the ceiling top plate).  
         [0072]      FIGS. 1 and 2  illustrate an installation example. In the illustrated application, clip  20  is shown installed upon a horizontally extending double top plate  22 , being secured by a conventional faster comprising a drywall screw  23  that penetrates suitable perforations formed in the clip  20 . Top plate  22  horizontally overlies a plurality of conventional, vertically oriented framing studs  24  that are typically spaced apart at sixteen or twenty-four inch intervals. The exposed sides  22 A of the top plate  22  are flushly parallel with the flat, coextensive side surfaces  24 A of the various frame studs  24 . The uppermost flat, horizontal surface of the top plate  22  has been designated by the reference numeral  25 . During construction, there will usually be a sheet of insulation (not shown) disposed over surface  25 . It should be appreciated that outside edges  22 E ( FIGS. 1,2 ) of the top plate, and construction two-by-fours in general, are neither perfectly square nor uniformly dimensioned.  
         [0073]     A drywall sheet  28  disposed horizontally to form the ceiling abuts clip  20  at its underside, being fastened with suitable fasteners, such as a conventional drywall screw  30  that engages and seats within suitable perforations in the clip  20 . It should be recognized that the clip and the described method may be utilized in conjunction with planar sheets comprising gypsum board, sheet rock, masonite, insulation board, plywood or the like. The flat upper surface  29  of sheet  28  contacts the underside of clip  20 , and is generally parallel and coplanar with the upper surface  25  of the top plate  22 .  
         [0074]     A vertically oriented drywall sheet  32  forming a sidewall flatly lies upon the exposed sides  22 A of the top plate  22  and the side surfaces  24 A of the studs  24 . Sidewall sheet  32  perpendicularly intersects the underside of ceiling sheet  28  and abuts and overlies a portion of clip  20 , concealing drywall screws  23  after proper installation in accordance with the invention. Fasteners, such as drywall screws  34 , conventionally secure sheet  32  at periodic, regularly spaced apart intervals. Through the installation and use of clip  20 , that is constructed and installed as hereinafter described, the proper orientation and alignment of sheet rock panels such as sheets  28  and  32  is facilitated. Moreover, it can be seen that after installation, no part of the clip  20  can be seen, as sheets  28  and  32  completely cover each and every clip. This means that no exposed rough metal pieces or portions are in the way to snag, for example, during the subsequent sheet rock finishing process. Further, when screws  23  are forcibly installed, flexing of the clip from its normal eighty-seven degree configuration (as explained below) enables the clip to conform to irregular corners  22 E and to establish and preserve a substantially square, hard fastened construction.  
         [0075]     With primary reference directed now to  FIGS. 3-11 , clip  20  comprises a rigid, preferably stamped metallic body having a generally T-shaped side profile (i.e., as seen in  FIG. 11 ). Clip  20  comprises a front  40 , a rear  42  (i.e.,  FIGS. 5, 6 ), and a pair of spaced-apart sides  44  and  45  (i.e.,  FIGS. 7, 8 ). The upper region of a preferred clip  20  is best seen in  FIGS. 3, 5 , and  7 . The underside of the clip  20  is best seen in  FIGS. 4, 6 , and  8 . The steel clip  20  is preferably stamped in multiple stages during the manufacturing process, and the preferred thickness is 0.036 inches.  
         [0076]     A rear body portion, generally designated by the reference numeral  27  (i.e.  FIGS. 5-8 ), has a length  55  (i.e.,  FIGS. 7, 8 ) extending generally from the clip rear  42  to the clip middle  61 , A junction  63  formed between downwardly projecting tab  70  and the rear body portion  27  is seen in  FIG. 11 . A central perforated region  58  of the clip rear body portion  27  is bordered by elongated, parallel reinforcement grooves  60 ,  62 . Preferably central region  58  is perforated, comprising numerous orifices  59  ( FIGS. 3, 4 ) so that fasteners  30  ( FIGS. 1, 2 ) can easily penetrate it. The positioning of central region  58  facilitates blind penetration so screw assembly is eased.  
         [0077]     A pair of integral, spaced apart and parallel fingers  50  and  52  project forwardly from the clip. The length of the fingers is generally designated by the reference numeral  67  ( FIG. 7 ). Fingers  50 ,  52  are integral and coplanar with central rear body portion  27  and its rear side portions  54 ,  56  respectively. These non-perforated sides  54 ,  56  form contiguous sides of the rear body portion  27  adjacent the reinforcement grooves  60 ,  62  and preferably they are nonperforated. Referencing  FIG. 1 , when a clip  20  is first installed, fingers  50  and  52  glide upon the top plate surface  25 , nondestructively extending beneath any insulation layer  49 , and temporarily retaining the clip on the top plate  22 . The reduced finger profile, and the lack of projecting reinforcements, minimizes interference. As seen in  FIGS. 3 and 6 , the ends  51  of the fingers  50 ,  52  are radiused or curved, since clip  20  does not require the forcible penetration of any panels or frame structure. Rear side portions  54 ,  56  also have radiused end corners  57  (i.e.,  FIGS. 3, 6 ). These rounded or radiused ends and corners prevent injuries to installers, and since there are no pointed corners or ends, the clips  20  will not degrade or tear the insulation  49  ( FIG. 1 ) or provide a snagging point that interferes with subsequent drywall finishing.  
         [0078]     The parallel pair of elongated, parallel, reinforcement grooves  60 ,  62  separate side portions  54 ,  56  of the rear central region  58  of the clip body from the central perforated region  58 . Rear central region  58  is perforated, comprising numerous orifices  59  ( FIGS. 3, 4 ) so that fasteners  30  ( FIGS. 1, 2 ) can easily penetrate it. Because of the configuration adopted, blind fastening is enabled. For example, when a panel  28  is lifted into place (as in  FIG. 1 ) the clip  20  will be visibly obscured, but an approximate alignment by the installer will insure correct penetration of the clip and proper seating by the screw  30 . Referencing particularly  FIGS. 5 and 9 , the reinforcement grooves  60 ,  62  are convex at the top  21  ( FIG. 5 ) of the clip  20 ; in other words, the grooves project upwardly, such that the concave bottom projects downwardly relative to the clip body. This preferred groove orientation insures that the bottom  26  ( FIG. 6 ) of the clip  20  rests substantially flatly on the top surface  29  (i.e.,  FIG. 1 ) of the horizontally oriented ceiling sheet  28  that the clip physically contacts when installed.  
         [0079]     Central rear body region  58  is integral with rigid, perforated tab  70  that projects substantially perpendicular downwardly from the clip  20  at the clip middle, which has been generally designated by the reference numeral  61  (i.e.,  FIGS. 7, 8 ). There are radiused stress relief notches  81  ( FIG. 3 ,  7 , 8 ) that occupy middle  61  along the junction between the tab and the body rear portion. The illustrated construction enables the to flex slightly in response to screw pressure, enabling a square fitting.  
         [0080]     A gap  53  ( FIG. 6 ) exists between fingers  50  and  52  in that region that would otherwise be substantially occupied by the smaller tab  70  prior to its bending during the preferred manufacturing stamping process. The gap width is designated by the reference numeral  69  ( FIGS. 6, 8 ). The perforated tab  70  has a plurality of orifices  71  similar to orifices  59  already discussed that enable the ready application of fasteners, such as sheetrock screws  23  ( FIG. 2 ). The tab width is indicated by reference numeral  72  in  FIG. 7 . The tab length  73  is seen in  FIGS. 9 and 10 .  
         [0081]     There is a centered indexing hole  74  at the clip middle  61  between the rear central region  58  and tab  70  that is utilized by the tooling during manufacture.  
         [0082]     As best seen in  FIG. 11 , in the best mode tab  70  forms an angle of less than ninety degrees with respect to the grooves  60 ,  62  and the rear central region  58 . This angle is preferably between eighty and eighty-nine degrees, and most preferably is eighty seven degrees. Because of this angular construction, the clip can deform slightly when; pressed up against a top plate in response to screwing so it flushly abuts the structure, notwithstanding irregularities in the dimensions or shape of the framework. Further, it is preferred that the end corners  76  of tab  70  are radiused and unpointed. Referencing  FIG. 12 , the aforementioned construction makes it possible to form stacks  87 . In other words, numerous clips  20  can be nested on top of one another to form a stack  87 , thereby minimizing volume for shipping and packaging.  
         [0083]     Installation:  
         [0084]     Initially a clip  20  is placed as in  FIG. 1 , with the forwardly projecting fingers  50 , 52  overlying the top plate  22 . Rear spears slide under insulation wrap and support clip before screw or nail is installed.  
         [0085]     A drywall screw  23  is then screwed through the perforated bottom tab  70  into the top plate  22  securing the clip  20 . Multiple clips  20  may be spaced apart at distances of from sixteen to twenty four inches.  
         [0086]     The drywall sheet  28  that forms the ceiling is secured to the intermediate portion  58  of the clip  20  by blindly screwing through the perforations  59 . Screws  30  ( FIG. 1 ) secure the ceiling sheet  28 .  
         [0087]     Afterwards, the drywall sidewall sheet  32  is secured or screwed to the top plate  22  with numerous screws  34  ( FIG. 1 ). When sheet  32  is positioned and secured, all clips  20  will be covered, and no portions of metal will be exposed. This means that drywall finishing can progress easily without sanding or grinding exposed clip ends or edges, and there will be no exposed points or jagged edges to interfere with the drywall finishing tools.  
         [0088]     From the foregoing, it will be seen that this invention is one well adapted to obtain all the ends and objects herein set forth, together with other advantages which are inherent to the structure.  
         [0089]     It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of the claims.  
         [0090]     As many possible embodiments may be made of the invention without departing from the scope thereof, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.