Patent Publication Number: US-2009223741-A1

Title: Perimeter safety system for pre-engineered roof system construction

Description:
FIELD OF THE INVENTION 
     The present invention relates to a perimeter safety system for pre-engineered roof system construction and more particularly to a perimeter safety system that includes a plurality of perimeter safety stands. Each perimeter safety stand contains a main leg, a lateral support leg, and a perimeter leg. Safety lines interconnect each perimeter safety stand. 
     BACKGROUND OF THE INVENTION 
     Pre-engineered roof system construction poses occupational hazards to construction workers who must work above ground level and at such heights that their fall from the building may cause serious injury. The need exists for a perimeter safety system that may be easily installed, re-positioned as the structure is completed, and adaptable to a variety of different roof panels. Ease of re-positioning is important because as the roof is constructed with the placement of roof panels, each installed perimeter safety stand will need to be disconnected, the roof panel put in place, and the perimeter safety stand reconnected. Adaptability is also desirable so that the perimeter safety system can be used with roof systems having different panel configurations. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention to provide a perimeter safety system that can be easily fastened to a substructure, unfastened as construction of the pre-engineered roof system progresses, and re-fastened to the substructure as the roof is completed. 
     It is also an object of the present invention to provide a perimeter safety system that is adaptable to a variety of metal roof panels such as R panels, M panels, trapezoid standing seam panels, and architectural standing seam panels. 
     The objects of the present invention are achieved by the novel perimeter safety system that includes a plurality of perimeter safety stands. Each perimeter safety stand has a main leg, a lateral support leg, and a perimeter leg. Each leg has an upper and a lower end. The lower end of each leg is connected to a panel foot that is capable of being detachably connected to a substructure of a pre-engineered roof system. Each panel foot is also capable of being positioned between corrugations of a roof panel or detachably connected to a standing seam of the roof panel. Because of its unique design, each perimeter safety stand can be unfastened from the substructure, a corrugated roof panel put into place, and the perimeter safety stand re-fastened to the substructure, or in the case where the roof panel has a standing seam, re-fastened to the standing seam. 
     The length of lateral support leg and perimeter leg may be adjusted to position the panel feet connected to each of the lower ends of the lateral support and perimeter legs at a variety of spatial positions on the roof to account for the specific location of substructure of the roof, valleys between corrugations of the roof panel, standing seams of the roof panels, or the slope of the roof, all of which may vary depending on the particular pre-engineered roof system being constructed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an embodiment of the perimeter safety system positioned on a roof of a pre-engineered roof system. 
         FIG. 2  is a perspective view of an embodiment of the perimeter safety stand. 
         FIG. 2   a  is a partial-perspective view of the embodiment of the perimeter safety stand illustrated in  FIG. 2  showing the connection of the main leg to the main leg panel foot. 
         FIG. 2   b  is a partial-perspective view of the embodiment of the perimeter safety stand illustrated in  FIG. 2  showing the connection of the lateral support leg to the lateral support leg panel foot. 
         FIG. 2   c  is a partial-perspective view of the embodiment of the perimeter safety stand illustrated in  FIG. 2  showing the connection of the perimeter leg to the perimeter leg panel foot. 
         FIG. 3  is a perspective view of the embodiment of the perimeter safety stand showing the placement of the panel feet between the corrugations of an exposed fastener roof panel. 
         FIG. 3   a  is a cross-sectional view taken along lines  3 A- 3 A of the embodiment of the perimeter safety stand of  FIG. 3  showing the attachment of main panel foot to a substructure of the metal building. 
         FIG. 4  is an exploded perspective view of the embodiment perimeter safety stand showing the connection of upper ends of the main, lateral support and perimeter legs and insertion points for the upper and lower legs. 
         FIG. 4   a  is partial, exploded perspective view of the embodiment of the perimeter safety stand illustrated in  FIG. 4  showing the connection of the upper ends of the main, lateral support and perimeter legs. 
         FIG. 5  is partial perspective view of an alternative embodiment of the perimeter safety stand showing the connection of a panel foot to a standing seam of a concealed fastener roof panel. 
         FIG. 5   a  is cross-sectional view taken along lines  5 A- 5 A of the alternative embodiment of the perimeter safety stand of FIG.  5  showing the connection of main leg panel foot to the standing seam of a concealed fastener roof panel. 
         FIG. 6  is a perspective view of a standing seam fixation member. 
         FIG. 7  is a partial perspective view of the embodiment of the perimeter safety stand showing the attachment of safety lines thereto. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     With reference to the figures where like elements have been given like numerical designation to facilitate an understanding of the present invention, and particularly with reference to the embodiment of the perimeter safety system illustrated in  FIG. 1 , perimeter safety system  10  is depicted as including two or more perimeter safety stands  11  positioned along the perimeter or edge  12  of pre-engineered roof system  13 . The number of perimeter safety stands  11  constituting or included within perimeter safety system  10  may vary depending on the size of pre-engineered roof system  13  and the area desired to be protected by perimeter safety system  10 . 
     As shown in  FIG. 2 , each perimeter safety stand  11  may include main leg  14 , lateral support leg  15 , and perimeter leg  16 . Main leg  14  may include upper end  17 , middle section  18 , and lower end  19 . Lower end  19  of main leg  14  may be detachably connected to main leg panel foot  20 . Upper end  17  of main leg  14  may include upper safety line receptacle  21 . Middle section  18  of main leg  14  may have middle safety line receptacle  22 . 
     Again with reference to  FIG. 2 , lateral support leg  15  may have upper end  23  and lower end  24 . Lower end  24  of lateral support leg  15  may be detachably connected to lateral support leg panel foot  25 . Upper end  23  of lateral support leg  15  may be detachably connected to upper end  17  of main leg  14 . 
       FIG. 2  also shows that perimeter leg  16  may have upper end  26  and lower end  27 . Lower end  27  of perimeter leg  16  may be detachably connected to perimeter leg panel foot  28 . Upper end  26  of perimeter leg  16  may be detachably connected to upper end  17  of main leg  14 . 
     Referring to  FIG. 2   a,  lower end  19  of main leg  14  may include bracket  32  with bolt hole  33 . Main leg panel foot  20  may include bracket  34  with bolt hole  35 . Bracket  32  may be detachably connected to bracket  34  by bolt  36  extending through bolt holes  33 ,  35  and held in place by nut  37 . 
     As shown in  FIG. 2   b,  lower end  24  of lateral support leg  15  may include bracket  38  with bolt hole  39 . Lateral support leg panel foot  25  may include bracket  40  with bolt hole  41 . Bracket  38  may be detachably connected to bracket  40  by bolt  42  extending through bolt holes  39 ,  41 , and held in place by nut  43 . 
       FIG. 2   c  reveals that lower end  27  of perimeter leg  16  may include bracket  44  with bolt hole  45 . Perimeter leg panel foot  28  may include bracket  46  with bolt hole  47 . Bracket  44  may be detachably connected to bracket  46  by bolt  48  extending through bolt holes  45 ,  47 , and held in place by nut  49 . 
     As illustrated in  FIG. 3 , main leg panel foot  20 , lateral support leg panel foot  25 , and perimeter leg panel foot  28  are each capable of being detachably connected to substructure  29  of pre-engineered roof system  13 . Preferably, substructure  29  is a purlin and more preferably a double-nested purlin. Main leg panel foot  20 , lateral support leg panel foot  25  and perimeter leg panel foot  28  are also each capable of being positioned crosswise between corrugations  30  of exposed fastener roof panel  31 . 
       FIG. 3   a  shows that main leg panel foot  20  may include at least two screw holes  50 . Screws  51  may be inserted through screw holes  50  to detachably connect main leg panel foot  20  to substructure  29  of pre-engineered roof system  13 . Main leg panel foot  20  is positioned crosswise between corrugations  30  of exposed fastener roof panel  31 . Likewise, each of lateral support leg panel foot  25  and perimeter leg panel foot  28  may be affixed crosswise between corrugations  30  of exposed fastener roof panel  31 . 
     As illustrated in  FIGS. 2 and 4 , lateral support leg  15  may be a telescoping leg with lower leg section  52  and upper leg section  53 . Upper leg section  53  may be insertable into lower leg section  52  and be extendable and retractable within lower leg section  52  so that the length of lateral support leg  15  may be selectively adjusted to position lateral support leg panel foot  25  on pre-engineered roof system  13  during construction. The telescoping feature of lateral support leg  15  enables the slope of perimeter safety stand  11  to be adjusted so that main leg  14  is substantially perpendicular to exposed fastener roof panel  31 . 
     As shown in  FIGS. 2 and 4 , upper leg section  53  may be secured within lower leg section  52  after selecting the length of lateral support leg  15 . Lower leg section  52  may have one or more adjustment keys  56  insertable into and through key hole nut  57  in lower leg section  52  to brace or wedge against upper leg section  53  thereby keeping upper leg section  53  stationary within lower leg section  52 . Adjustment key  56  may be any type of object that can apply a force to upper leg section  53  to keep it from moving (extending or retracting) within lower leg section  52 . Adjustment key  56  may be a hand-threaded bolt. 
     Two adjustment keys  56  may be provided on lower leg section  52 . Upper leg section  53  may also have two or more spaced-apart pin holes  54 . Detachable pin with circular safety clip  55  may be placed into one of pin holes  54 . Detachable pin with circular safety clip  55  acts as a secondary stop, preventing upper leg section  53  from retracting further or completely within lower leg section  52 . Detachable pin with circular safety clip  55  may be attached to lower leg section  52  by lanyard  111 . Lanyard  111  may be secured to adjustment key  56 . 
     As also shown in  FIGS. 2 and 4 , perimeter leg  16  may be a telescoping leg with lower leg section  58  and upper leg section  59 . Upper leg section  59  may be insertable into lower leg section  58  and be extendable and retractable within lower leg section  58  so that the length of perimeter leg  16  may be selectively adjusted to position perimeter leg panel foot  28  on pre-engineered roof system  13  during construction. 
     Again with reference to  FIGS. 2 and 4 , upper leg section  59  may be secured within lower leg section  58  after selecting the length of perimeter leg  16 . Lower leg section  58  may have one or more adjustment keys  62  insertable into and through key hole nut  63  in lower leg section  58  to brace or wedge against upper leg section  59  thereby keeping upper leg section  59  stationary within lower leg section  58 . Adjustment key  62  may be any type of object that can apply a force to upper leg section  59  to keep it from moving (extending or retracting) within lower leg section  58 . Adjustment key  62  may be a hand-threaded bolt. 
     Two adjustment keys  62  may be provided on lower leg section  58 . Upper leg  59  may also have two or more spaced-apart pin holes  60 . Detachable pin with circular safety clip  61  may be placed into one of pin holes  60 . Detachable pin with circular safety clip  61  acts as a secondary stop, preventing upper leg section  59  from retracting further or completely within lower leg section  58 . Detachable pin with circular safety clip  61  may be attached to lower leg section  58  by lanyard  111 . Lanyard  111  may be secured to adjustment key  62 . 
       FIG. 4   a  shows that upper end  17  of main leg  14  may include first bracket  64  with bolt hole  65  and second bracket  66  with bolt hole  67 . Upper end  23  of lateral support leg  15  may include bracket  68  with bolt hole  69 . Upper end  26  of perimeter leg  16  may include bracket  70  with bolt hole  71 . Upper end  23  of lateral support leg  15  may be connected to upper end  17  of main leg  14  by detachably connecting first bracket  64  of upper end  17  of main leg  14  and bracket  68  of upper end  23  of lateral support leg  15  via bolt  72  extending through bolt holes  65 ,  67 , and held in place by nut  73 . 
     Upper end  26  of perimeter leg  16  may be connected to upper end  17  of main leg  14  by detachably connecting second bracket  66  of upper end  17  of main leg  14  and bracket  70  of upper end  26  of perimeter leg  16  via bolt  74  extending through bolt holes  67 ,  71 , and held in place by nut  75 . First and second brackets  64 ,  66  on upper end  17  of main leg  14  may each extend outwardly and perpendicular to main leg  14 . Upper end  17  of main leg  14  may also include third bracket  114  that can be used as a connection means for either of lateral support leg  15  or perimeter leg  16  as described above. 
       FIG. 5  shows an alternative embodiment of perimeter safety stand  11  in which perimeter leg panel foot  28  is made adaptable for fixation to standing seam  76  of concealed fastener roof panel  113  when roof system panel  31  is in the form of a trapezoid standing seam panel or an architectural standing seam panel. It is to be understood that main leg panel foot  20  and lateral support leg panel foot  25  may also be made adaptable for fixation to standing seam  76  of concealed fastener roof panel  113  when roof system panel  31  is in the form of a trapezoid standing seam panel or an architectural standing seam panel. 
       FIGS. 5 and 5   a  show the alteration to perimeter leg panel foot  28  that results in the adaptability for fixation to standing seams  76 . Perimeter leg panel foot  28  may have top surface  77 , bottom surface  78 , and interconnecting side surfaces  79 . First standing seam fixation means  80  may be detachably connected to bottom surface  78  of perimeter leg panel foot  28 . Second standing seam fixation means  81  may be detachably connected to bottom surface  78  of perimeter leg panel foot  28 . It is to be understood that main leg panel foot  20  and lateral support leg panel foot  25  may each be made adaptable in the same manner as perimeter leg panel foot  28  as described hereinabove. 
       FIGS. 5   a  and  6  depict first and second standing seam fixation means  80 ,  81 . First and second standing seam fixation means  80 ,  81  may each be a U-shaped rectangular block  82  with top surface  83 , bottom surface  84 , and interconnecting side surfaces  85 ,  86 ,  87 , and  88 . U-shaped rectangular block  82  may have cut-out area  89  which may receive and accommodate standing seam  76  of concealed fastener roof panel  113 . Each standing seam fixation means  80 ,  81  may have bolt hole  90  running from top surface  83  through to cut-out area  89 . Preferably, U-shaped rectangular block  82  is an S-5!™ clamp commercially available from Metal Roof Innovation, Ltd. of Colorado Springs, Colo. 
     To detachably connect first standing seam fixation means  80  to perimeter leg panel foot  28 , hole  90  in top surface  83  of U-shaped rectangular block  82  is aligned with one of holes  91  in perimeter leg panel foot  28 . Bolt  92  is run through hole  91  and threadedly connected to hole  90  to thereby detachably connect first standing fixation means  80  to perimeter leg panel foot  28 . 
     Second standing seam fixation means  81  is detachably connected to perimeter leg panel foot  28  by aligning hole  90  in U-shaped rectangular block  82  with the second hole  91  in perimeter leg panel foot  28 . A second bolt  92  is run through hole  91  and threadedly connected to hole  90  to thereby detachably connect second standing fixation means  81  to perimeter leg panel foot  28 . In the same manner, first and second standing fixation means  80 ,  81  may be detachably connected to each of main leg panel foot  20  and lateral support leg panel foot  25 . 
     With reference to  FIG. 6 , U-shaped rectangular block  82  may have two or more holes  93  in side  85  that run through and enter cut-out area  89 . Camming device  94  may be inserted into each hole  93 . Camming devices- 94  act to clamp U-shaped rectangular block  82  to standing seam  76  of concealed fastener roof panel  113  when standing seam  76  is positioned within cut-out area  89  of U-shaped rectangular block  82 . Holes  93  may be threaded. Camming device  94  may be a thread bolt. 
     As shown in  FIGS. 1 and 7 , upper safety line  95  may be run through, positioned within, or connected to upper safety line receptacle  21  of each perimeter safety stand  11 . Middle safety line  96  may be run through, positioned within, or connected to middle safety line receptacle  22  of each perimeter safety stand  11 . 
       FIG. 7  illustrates that the ends of upper safety line  95  and the ends of middle safety line  96  may be anchored to the corner or end perimeter safety stands  11  in the series of perimeter safety stands  11  constituting perimeter safety system  10 . The anchoring of the ends of upper and middle safety lines  95 ,  96  may be employed on one or more perimeter safety stands  11  depending on how many perimeter safety stands  11  form the end or corner perimeter safety stand  11  within perimeter safety system  10 . There may be two perimeter safety stands  11  that act as the end or corner perimeter safety stands  11  within perimeter safety system  10 . 
     Again with reference to  FIG. 7 , each of opposite end sections  97  of upper safety line  95  may be anchored or tied to upper anchor device  98 . Each of opposite ends  99  of middle safety line  96  may be anchored or tied to middle anchor device  100 . Upper anchor devices  98  each may have spaced-apart holes  101  through which end section  97  of upper safety line  95  may be wound and tied. 
     Upper anchor devices  98  each may have holes  102  for detachable connection of snap hook or carabiner  103 . Snap hook or carabiner  103  may be detachably secured to upper safety line receptacle  21  of the corner or end perimeter safety stand  11  to anchor upper safety line  95 . Middle anchor devices  100  each may have spaced-apart holes  101  through which end section  99  of middle safety line  96  may be wound and tied. 
     Middle anchor devices  100  each may have holes  102  for detachable connection of snap hook or carabiner  103 . Snap hook or carabiner  103  may be detachably secured to middle safety line receptacle  22  of the corner or end perimeter safety stand  11  to anchor middle safety line  96 . 
     Upper and middle anchor devices  98 ,  100  may be “Hold Me Anchor” anchor means commercially available from Guardian Fall Protection of Kent, Wash. 
     With reference to  FIGS. 2 and 7 , upper and middle safety line receptacles  21 ,  22  may be any object capable of retaining upper and middle safety lines  95 ,  96 . Upper and middle safety line receptacles  21 ,  22  may each be formed of plate  104 . Plate  104  may have top surface  105 , bottom surface  106 , and interconnected sides  107 . Plate  104  may have L-shaped portion  108 . L-shaped portion  108  may have one or more holes  109  for receiving snap hooks or carabiners  103  to anchor safety lines  95 ,  96  to end or corner perimeter safety stands  11 . Plate  104  may have horn  110 . Horn  110  may be affixed to top surface  105  of plate  104 . Horn  110  receives, retains, or accommodates upper and/or middle safety lines  95 ,  96 . 
     Again with reference to  FIGS. 2 and 7 , upper safety line receptacle  21  may be affixed to upper end  17  of main leg  14  by permanently securing bottom surface  106  of plate  104  to upper end  17  of main leg  14 . Middle safety line receptacle  22  may be affixed to middle section  18  of main leg  14  by permanently securing bottom surface  106  at L-shaped portion  108  of plate  104  middle section  18  of main leg  14 . 
     Perimeter safety system  10  is designed and engineered to be used as a guardrail system that constitutes a part of a means of fall protection for workers constructing pre-engineered roof system  13 . Perimeter safety system  10  is not meant to be used as an anchorage point for fall protection. Perimeter safety system  10 , used in conjunction with an approved safety net, is an acceptable fall protection system that can be used with pre-engineered metal building or roof construction. Perimeter safety system  10  is designed to be used on buildings having a low slope roof of 3:12 or less. 
     Main leg  14 , lateral support leg  15 , and perimeter leg  16  of perimeter safety stand  11  may each be made of steel or other hard material. Main leg  14 , lateral support leg  15 , and perimeter leg  16  may each be tubular in design. Main leg  14 , lateral support leg  15 , and perimeter leg  16  may each be a rectangularly-shaped tube. 
     Main leg  14  may have the following dimensions: length  41 ″, width 1½″, thickness 14 gauge. 
     Lateral support leg  15  may have the following dimensions: upper section  53 ,  71 —length  53 ″, width 1¼″, thickness ⅛″; lower section  52 ,  70 —length  52 ″, width 1½″, thickness 14 gauge, diameter of hole  54  ⅜″. Length of lateral support leg  15  in fully extended position  80  ¼″ and fully retracted  60  ¼″. 
     Perimeter leg  16  may have the following dimensions: upper section  53 ,  71 —length  53 ″, width 1¼″, thickness ⅛″; lower section  52 ,  70 —length  52 ″, width 1½″, thickness 14 gauge, diameter of hole  54  ⅜″. Length of perimeter leg  16  in fully extended position  80  ¼″ and fully retracted  60  1¼″. 
     Bracket  32  may be made of steel or other hard material and may be welded to lower end  19  of main leg  14 . Bracket  38  may be made of steel or other hard material and may be welded to lower end  24  of lateral support leg  15 . Bracket  44  may be made of steel or other hard material and may be welded to lower end  27  of perimeter leg  16 . 
     Brackets  32 ,  38 ,  44  may each have the following dimensions: length 2½″, width 1¼″, thickness ¼″; and diameter of holes  33 ,  39 ,  45  is 5/16″. 
     First bracket  64  and second bracket  66 , may each be made of steel or other hard material and may each be welded to upper end  17  of main leg  14 . Bracket  68  may be made of steel or other hard material and may be welded to upper end  23  of lateral support leg  15 . Bracket  70  may be made of steel or other hard material and may be welded to upper end  26  of perimeter leg  16 . Brackets  64 ,  66 ,  68 ,  70  may each have the following dimensions: length 2½″, width 1¼″, thickness ¼″; and diameter of bolt holes  65 ,  67 ,  69 ,  71  is 5/16″. 
     Main leg panel foot  20 , lateral support leg panel foot  25 , and perimeter leg panel foot  28  may each be made of steel or other hard material. Panel feet  20 ,  25 ,  28  may each have the following dimensions: length 9¼″, width 4″, thickness ¼″, diameter of screw holes  50  is 3/16.″ 
     Brackets  34 ,  40 ,  46  may each be made of steel or other hard material and may each be welded to respective panel feet  20 ,  25 ,  28 . The dimensions of brackets  34 ,  40 ,  46  may each be length 2½″, width 1¼″, thickness ¼″, diameter of bolt holes  35 ,  41 ,  45  is 5/16″. 
     First and second standing seam fixation means  80 ,  81  and may each be made of steel, aluminum, or other hard metal. The dimensions of U-shaped rectangular block  82  may be: height 2½″, width 1½″, length 3″, width of cutout area  89  is ½″, diameter of bolt hole  90  is 5/16″, diameter of holes  93  is 5/16″. As previously mentioned, U-shaped rectangular blocks  82  may be S-5!™ clamps commercially available from Metal Roof Innovations, Ltd. of Colorado Springs, Colo. 
     Upper safety line receptacle  21  and middle safety line receptacle  22  may each be made of steel or other hard material and may be welded to main leg  14 . Plate  104  may have the following dimensions: length 7″ with L-shaped portion  108  having a length of 2½″, width 4″, thickness ¼″, diameter of holes  109  is ¾″. 
     If upper safety line receptacle  21  and middle safety line receptacle  22  are in the form of a ring, the diameter of the ring may be 1⅞″ O.D. and 1½″ I.D. 
     Detachable pins with circular safety clips  55 ,  61  may be made of steel, aluminum, or other hard material. 
     Upper anchor device  98  and middle anchor device  100  may each be made of steel, aluminum, or other hard material that has a minimum strength rating of 200 lbs. As mentioned earlier, upper anchor device  98  and middle anchor device  100  may each be “Hold Me Anchor” anchor means commercially available from Guardian Fall Protection of Kent, Wash. 
     Snap hooks or carabiners  103  may be a snap hook available commercially from a variety of suppliers including manufacturer Guardian Fall Protection or a carabiner also available commercially from Guardian Fall Protection or other suppliers. Snap hooks or carabiners  103  may be made of steel, aluminum, or other hard material. 
     Except for end walls, each perimeter safety stand  11  may be attached at every frame line where substructure  29  is capable of supporting perimeter safety stand  11  (e.g., where zee purlins are double-nested). Panel feet  20 ,  25 ,  28  of each perimeter safety stand  11  may be affixed to the substructure  29  (e.g., double-nested purlin) by at least two screws  51  such as ZAC Impax ⅜″ #12-14 screws or an equivalent screw. Screws  51  should not be over-tightened as stripped out screws are not acceptable. A ZAC Impax #17 screw or equivalent is acceptable for use in stripped areas. 
     The perimeter safety system  10  may be installed on the perimeter  12  of pre-engineered roof system  13  prior to installation of exposed fastener roof panels  31 . Once installation of panels  31  begins, each perimeter safety stand  11  will need to be unfastened from substructure  29  so that panel  31  may be placed in that location. When panel  31  is in place, perimeter safety stand  11  may be fastened back down to substructure  29  using new screws  51 . Panel feet  20 ,  25 ,  28  are each designed to lie between the highs or standing seams  76  of corrugations  30  of exposed fastener roof panel  31 . Rubber mat  112  may be attached to bottom surface  78  each panel foot  20 ,  25 ,  28  and to seal off screw  51  penetrations and prevent corrosion. 
     Upper and middle safety lines  95 ,  96  may each be a minimum of ⅝″ polypropylene fiber rope or its equivalent (minimum working load limit of 200 lbs. or greater is required). It is to be understood that safety lines  95 ,  96  may be a polypropylene fiber rope or other similar rope or line having a diameter that is greater than ⅝″. To terminate ends  97  and  99  of respective safety lines  95 ,  96 , “Hold Me Anchor” anchor devices  98 ,  100  made by Guardian Fall Protection may be used. Plastic flaggins [not shown] cut into 12″ long sections may be attached about every 6′ along each of safety lines  95 ,  96 . 
     Once the perimeter safety system  10  is installed, bolts  36 ,  42 ,  48 ,  72 ,  74  and all “T” handles on main leg  14 , lateral support leg  15 , and perimeter leg  16  may be hand tightened. Bolts  36 ,  42 ,  48 ,  72 ,  74  may each be A-325 bolts. After hand-tightening each bolts  36 ,  42 ,  48 ,  72 ,  74 , detachable safety pin with circular safety clip  55  may be inserted into one of holes  54  of lateral support leg  15  to fix the length of lateral support leg  15  and prevent upper leg section  53  from sliding into lower leg section  52  of lateral support leg  15  and detachable safety pin with circular safety clip  61  may be inserted into one of holes  60  of perimeter leg  16  to fix the length of perimeter leg  16  and prevent upper leg sections  59  from sliding into lower leg section  58  of perimeter leg  16 . 
     While preferred embodiments of the present invention have been described, it is to be understood that the embodiments described are illustrative only and that the scope of the invention is to be defined solely by the appended claims when accorded a full range of equivalence, many variations and modifications naturally occurring to those skilled in the art from a perusal hereof.