Patent Abstract:
The present invention relates to fall protection systems to which a scaffolder can tie off during scaffold construction by adjusting the height of the lifeline and to move along the entire length of a scaffold level without having to disengage the lifeline. In one embodiment the fall protection system includes two vertical support members adapted to be affixed to a scaffold frame wherein the two vertical members have attachment means for attachment of a lifeline, and wherein the attachment means are located at each respective vertical member and configured for movable attachment at a plurality of positions along the vertical axis of each support members. In addition the present invention relates to methods to use the fall protection system during scaffold construction.

Full Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
       [0001]    This application claims the priority of provisional patent application Appl. No. 61/490,857, filed May 27, 2011. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    The present invention relates to the field of scaffolding safety and in particular scaffold safety relating to fall protection systems. 
         [0003]    Many types of construction or maintenance of buildings, have to be carried out at relatively high elevations and thus require the use of scaffolds. An inherent risk during this type of work is falling from the scaffold during erection of the scaffold or during working on the scaffold. Often, the distance from the fall site to the ground is relatively large and the fall can thus cause severe injury or death. Various devices are currently used to prevent a person working on a scaffold to fall off the scaffold. Examples of safety devices currently used for fall protection during scaffolding are retractable lanyards or safety straps with rope grab mechanism. In both cases, the lanyard or safety strap is attached to a harness worn by the scaffolder. The lanyard or safety strap is then secured on the scaffold frame. There are several disadvantages to these devices. First, due to regulations, the lanyard or safety strap cannot exceed several feet in length. Thus a worker might have to release and re-attach his lanyard or safety strap several times when walking from one end of the scaffold to the other. This presents an inconvenience to workers and prevents them from walking efficiently and freely on the scaffold. Especially when work on the scaffold requires using both hands to carry building material etc. releasing and re-attaching the lanyard or safety strap will interfere with the construction process. Further, when erecting a new level of scaffolding, the initial platform of the newly built level does not provide any tie off points above the waist level of the worker. Workers therefore have to remain tied off on the first level below. This means that the lanyard or safety strap will extend below the waist of the worker and presents the risk of tripping over the lanyard or safety strap or getting caught up on the scaffold frames below. Having the lanyard secured below the waist level of the worker also means that in case of a fall, the fall distance equals almost the entire length of the lanyard and poses the risk of injury. 
         [0004]    It would therefore be desirable and advantageous to provide an improved fall protection system to obviate prior shortcomings of other systems to provide a system that is safer and more convenient for workers during scaffold construction. 
       SUMMARY OF THE INVENTION 
       [0005]    In one aspect of the present invention, the fall protection system includes a first longitudinal vertical support member and a second longitudinal vertical support member, adapted to be affixed to a scaffold frame, and a lifeline extending between the first and second longitudinal vertical member. 
         [0006]    It is another aspect of the present invention to include more than one fall protection system being installed at the same time. If more than one protection system is installed the second fall protection system is to be installed in such a way that the second lifeline is located on the opposite site of the first lifeline, thus allowing two workers to tie off on different lifelines and to cross paths without their tie off rings interfering with each other. 
         [0007]    In another aspect of the present invention, the lifeline can be made from different materials like textile or metal. Preferably the lifeline is made out of high tensile material such as nylon or polyester rope but may also be made out of steel or wire rope. In a particularly preferred embodiment the lifeline is pre-engineered and includes cable attachments (e.g. cable clamps, hooks, loops or carabiners) to secure the ends of the lifeline to the vertical support members and further includes devices to tighten the lifeline (e.g. a come along or a winch). 
         [0008]    In another aspect of the present invention the fall protection system includes a first longitudinal vertical support member and a second longitudinal vertical support member adapted to be affixed to a scaffold frame, a lifeline extending between the first and second longitudinal vertical member, attachment means for the attachment of the lifeline, with the attachment means being located at each respective vertical member. The attachment means can be affixed at a chosen position along the vertical axis of each vertical support member and if desired, released and reaffixed at a different position along the vertical axes of each vertical support member. 
         [0009]    In another aspect of the present invention each of the vertical support members is provided with grooves extending along the vertical axis of each support member and the attachment means are constructed to be movably attachable in the grooves. 
         [0010]    It is a further aspect of the present invention for the fall protection system to include a first longitudinal vertical support member and a second longitudinal vertical support member adapted to be affixed to a scaffold frame, a lifeline extending between said first and second longitudinal vertical member, and attachment means for the attachment of said lifeline. The attachment means are located at each respective vertical support member. The attachment means can be affixed at a chosen position along the vertical axis of each vertical support member and if desired, released and reaffixed at a different position along the vertical axis of each vertical support member. Further, each of the vertical support members is provided with grooves extending along the vertical axis of each support member and the attachment means are constructed as T-plates for movable attachment in the grooves. 
         [0011]    Advantageously, the fall protection system includes a first square longitudinal vertical support member and a second square longitudinal vertical support member, adapted for being affixed to a scaffold frame, a lifeline extending between the first and second square longitudinal vertical members and attachment means for the attachment of the lifeline. The attachment means are located at each respective vertical member and are adapted to be affixed at a chosen position along the vertical axes of the vertical support members. If desired the attachment means can be released and reaffixed at a different position along the vertical axis of the vertical support members. Further, the attachment means have a portion adapted for affixing the lifeline. 
         [0012]    Furthermore, the fall protection system includes a first circular longitudinal vertical support member and a second circular longitudinal vertical support member, adapted to be affixed to a scaffold frame, a lifeline extending between the first and second square longitudinal vertical member and attachment means for the attachment of the lifeline. The attachment means are located at each respective vertical member and can be affixed at a chosen position along the vertical axis of each vertical support member. If desired, the attachment means can be released and reaffixed at a different position along the vertical axis of the vertical support member. Further, the attachment means have a portion adapted for affixing the lifeline. 
         [0013]    It is a further aspect of the present invention for the fall protection system to include a first hexagonal longitudinal vertical support member and a second hexagonal longitudinal vertical support member, adapted to being affixed to a scaffold frame, a lifeline extending between the first and second hexagonal longitudinal vertical member and attachment means for the attachment of the lifeline. The attachment means are located at each respective vertical member and are adapted to be affixed at a chosen position along the vertical axes of the vertical support members. If desired the attachment means can be released and reaffixed at a different position along the vertical axis of the vertical support members. Further, the attachment means have a portion adapted for affixing the lifeline. 
         [0014]    In a further aspect of the present invention the vertical support members are made from metal, an alloy, plastic, or a combination thereof or any type of material that has the strength to withstand the force of an accidental fall of a person using the system. Examples of such materials include steel, titanium, or a combination thereof. 
         [0015]    In another embodiment, the fall protection system further includes a ladder adapted to be affixed to the vertical support member and to aid in moving between scaffold levels. 
         [0016]    It is a further aspect of the present invention for the fall protection system to include a rope grab device wherein each vertical support member includes a            
         [0017]    It is another aspect of the present invention that the fall protection system further includes a deflector post adapted to guide the horizontal lifeline around a corner. 
         [0018]    The present invention also relates to a method of using the fall protection system in which the fall protection system includes a first longitudinal vertical support member and a second longitudinal vertical support member, adapted to be affixed to a scaffold frame, a first lifeline and a second lifeline, attachment means for attachment of the lifelines, the attachment means being located at each respective vertical support member and configured for movable attachment at a plurality of positions along a vertical axis of the first and second vertical support members. The method includes the steps of attaching the first and second vertical support member to a scaffold structure, attaching the first lifeline to the attachment means on either of the vertical support members, tethering a person to the first lifeline during construction of a scaffold level, extending the second lifeline across the top of the new completed scaffold level, attaching the second lifeline to the attachment means on either of the vertical support members, tethering the person to the second lifeline, detaching the vertical members from the scaffold structure, reattaching the vertical members at a higher height at the scaffold structure, untethering the person from the first lifeline, detaching the first lifeline from the attachment means, adjusting the attachment means to a higher position along the vertical axis of each of the vertical member. 
         [0019]    The present invention resolves prior art problems by providing a fall protection system that enables the scaffold erectors to remain tied off during the entire phase of scaffold construction and dismantling. It provides tie off sites that are height adjustable at newly formed scaffold levels and allow workers on a scaffold to walk freely along the entire length of a scaffold platform without having to move their lanyard or safety strap. The system also includes a ladder that allows employees to climb from one scaffold level to the next instead of having to climb on the scaffold frame. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0020]    Other features and advantages of the present invention will be more readily apparent upon reading the following description of currently preferred exemplified embodiments of the invention with reference to the accompanying drawing, in which 
           [0021]      FIG. 1A  is an elevational front view of an erected scaffold showing the fall protection system support members at each end of the scaffold; 
           [0022]      FIG. 1B  is a top plan view of the scaffold with the fall protection system in place; 
           [0023]      FIG. 2A  is an elevational front view of a T-plate and groove version of a vertical support member; 
           [0024]      FIG. 2B  is an elevational side view of a T-plate and groove version of a vertical support member; 
           [0025]      FIG. 2C  is an elevational rear view of a T-plate and groove version of a vertical support member; 
           [0026]      FIG. 3A  is an elevational side view of a T-plate used in the T-plate and groove version of the system; 
           [0027]      FIG. 3B  is an elevational side view of a T-plate used in the T-plate and groove version of the system; 
           [0028]      FIG. 3C  is an elevational side view of a T-plate used in the T-plate and groove version of the system; 
           [0029]      FIG. 3D  is an elevational side view of a D-handle used in the T-plate and groove version of the system; 
           [0030]      FIG. 4  is a plan view of the rail system used in the T-plate and groove version of the system; 
           [0031]      FIG. 5A  is an elevational side view of the square version of a vertical support member; 
           [0032]      FIG. 5B  is an elevational rear view of the square version of a vertical support member; 
           [0033]      FIG. 5C  is an elevational plan view of the square version of a vertical support member; 
           [0034]      FIG. 6A  is an elevational side view of the circular version of a vertical support member; 
           [0035]      FIG. 6B  is a plan view of the top section of the circular version of a vertical support member; 
           [0036]      FIG. 6C  is a plan view of the bottom section of the circular version of a vertical support member; 
           [0037]      FIG. 7A  is an elevational side view of the octagonal version of a vertical support member; 
           [0038]      FIG. 7B  is a plan view of the octagonal version of a vertical support member; 
           [0039]      FIG. 8A  is an elevational side view of a deflector post; 
           [0040]      FIG. 8B  is an elevation front view of a deflector post; 
           [0041]      FIG. 8C  is a plan view of a deflector post; 
           [0042]      FIG. 9  is an elevational view of the fall protection system with a ladder; 
           [0043]      FIG. 10A  is an elevational side view of a vertical support member with rope grab mechanism; 
           [0044]      FIG. 10B  is a elevational side view of the vertical support member shown in  FIG. 10A  showing in more detail the connection between the rope grab mechanism and the vertical support member; 
           [0045]      FIG. 10C  is an elevational side view of the vertical support member with rope grab mechanism and shock absorber; 
           [0046]      FIG. 11  is an elevational side view of a vertical support member with fixed attachment means; 
           [0047]      FIG. 12A  is a front elevational view of a vertical support member with brace. 
           [0048]      FIG. 12B  is a side elevational view of a vertical support member with stiffener plate and brace connection plate; 
           [0049]      FIG. 12C  is a rear elevational view of a vertical support member with stiffener plate, brace and brace connection plate; 
           [0050]      FIG. 12D  is a side elevational view of the brace U-bracket shown in  FIG. 12C ; 
           [0051]      FIG. 13  is a side elevational view of a base level and second level of a scaffold with the fall protection system installed. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0052]    Throughout all the Figures, same or corresponding elements are generally indicated by same reference numerals. 
         [0053]    Turning now to the drawing and in particular to  FIG. 1A , there is shown an elevational front view of an embodiment of the basic use and setup of the fall protection system comprising vertical support members  5  and lifeline  6  mounted on a scaffold structure  1 . The scaffold structure  1  has scaffold frames  2  and scaffold braces  3  supporting a platform  4 . A vertical support member  5  is affixed to either end of the scaffold structure  1  with a lifeline  6  extending between each of the vertical support members  5 . As  FIG. 1A  illustrates, a person present on the platform  4  of the scaffold can tie off to the lifeline  6  with a safety strap  7  connected to a tie off ring  60 . 
         [0054]    In  FIG. 1B  a vertical support member  5  is shown on either side of the scaffold structure  1  and the lifeline  6  extending between each of them. In a preferred embodiment each of the vertical support members  5  is set up in such a way that the lifeline  6  extending between each vertical support member  5  is located on one side of the scaffold platform  4  in order to allow for easy maneuvering of workers on the platform. 
         [0055]      FIGS. 2A-C  show each vertical support member  5  having T-shaped grooves  8  in which each T-plate  9  is movable up or down along the vertical axis of each vertical support member  5 . T-plate  9  is configured for attachment of the lifeline (not shown here) to the T-plate  9 . The height of the lifeline is adjustable by moving each T-plate  9  vertically up or down along the T-shaped grooves  8 , to accommodate scaffold erectors&#39; needs. Top U-bracket  11  and bottom U-bracket  12  are attachments for securing each vertical support member  5  to the scaffold. Top U-bracket  11  and bottom U-bracket  12  are attached to each vertical support member  5  by thru bolts  15  that pass through U-bracket attachment holes  43  of the respective top U-bracket  11  and bottom U-bracket  12  and lateral holes  16  in each vertical support member  5 . The top U-bracket is secured to the scaffold frame by inserting bolts or pins into holes  17  to prevent disengagement of the vertical support member  5  from the scaffold frame through accidental upward movement. The vertical position of the bottom U-bracket  12  on each vertical support member  5  is adjustable to accommodate different size scaffold frames. Other examples of attachments that can be used to secure the vertical support members  5  to the scaffold include clamps, clasps, vises, nut &amp; bolt arrangements, fasteners, grips, or quick-release snap clamps or any other suitable attachments. Any attachment can be used so long as the vertical support members are securely attached to the scaffold and the vertical position of at least one of the attachments on each vertical support member  5  can be adjusted to accommodate different size scaffold frames  1 . A handle  10  may be present on each vertical support member  5  to aid in lifting and moving the vertical support member  5  to the desired position on the scaffold. Although the handle  10  shown in  FIG. 2A  is D-shaped other shapes of handles or devices can be used such as knobs as long as they aid in lifting and moving the vertical support member  5  to the desired position on the scaffold. The tie off eye  13  on top of the vertical support member  5  is used to tether the vertical support member to the scaffold frame while moving the vertical support member  5  from one position on the scaffold frame to another position. The lateral holes  16  are also used to bolt a ladder (ladder not shown here) to the vertical support member  5 . 
         [0056]      FIGS. 3A-D  show an example of a T-plate  9  as used in the T-plate and groove version of the fall protection system. The T-plate  9  has a face plate  36  and a tongue  37 . The T-plate  9  is locked at a desired elevation with bolts  20  that extend through the face plate  36  and engage with a threaded block  19  that fits into the T-shaped groove  8  on each vertical support member  5 . Further,  FIG. 3A  shows circular holes  14  in the tongue  37  to attach a lifeline (lifeline not shown). While  FIG. 3A  shows two circular holes  14  for the attachment of a lifeline, the number and shape of these holes  14  may vary. For example, as shown in  FIG. 3D  the tongue portion  37  can take on the shape of a D-handle  40 . The tongue portion  37  may have any shape or configuration so long as it allows for attachment of a lifeline. Further, instead of the bolts  20  and threaded blocks  19  other devices can be used as long as they allow a T-plate  9  to be movably attached in a T-shaped groove  8  and securely locked at a desired position along the vertical axis of each vertical support member  5 . 
         [0057]      FIG. 4  shows the T-shaped grooves  8  in more detail. The vertical support member  5  has one or more T-shaped grooves  8  that accommodate the threaded block  19  of a T-plate  9 .  FIG. 4  illustrates that the top U-bracket  11  is locked to the vertical support member  5  with a bolt  15  that passes through the U-bracket attachment holes  43  and lateral holes  16  of the vertical support member  5 . The T-plate  9  is movable up and down along the vertical axis of the vertical support member  5  and remains attached to the vertical support member  5  by its connection to the threaded block  19  in the T-shaped grooves  8 . The T-shaped grooves  8  are closed on their bottom, preventing the T-plate  9  from falling out. 
         [0058]      FIGS. 5A-C  show an embodiment of the square version of the fall protection system. In this embodiment the movable attachment means is a sliding collar  18  with tie off handle  17 . The top U-bracket  11  in this embodiment is fixed to the rear of the vertical support member  5  to allow the sliding collar  18  with tie off handle  17  to pass freely along the vertical support member  5 . The vertical position of the bottom U-bracket  12  along the vertical support member is adjustable to accommodate different size scaffold frames. To secure the bottom U-bracket  12  at a chosen vertical position on the vertical support member  5  the bottom U-bracket  12  is bolted in place using to the lateral holes  16 . More than one sliding collar  18  may be present on the vertical support member  5  allowing for more than one lifeline to be attached and workers to tie off on independent lifelines.  FIG. 5C  shows in more detail the arrangement of the sliding collar  18  relative to the vertical support member  5 . The sliding collar  18  is movable to a desired position along the vertical support member  5  and is then fixed in place with a pin or bolt  19  that extends through holes (not shown) in the sliding collar  18  and the lateral holes  16  in the vertical support member  5 . 
         [0059]      FIGS. 6A-C  show yet another embodiment of the fall protection system in which the movable attachment means comprises a circular sliding collar  22  with tie off handle  17 . The top U-bracket  11  is fixed to the circular vertical support member  5 . The circular sliding collar  22  has an opening  23  on its rear side facing the top U-bracket  11  to provide sufficient space between the circular sliding collar  22  and the top U-bracket  11  to enable the collar to pass the top U-bracket  11 . The circular sliding collar  22  is movable up and down on the vertical support member  5  using the tie off handle  17 . The circular sliding collar  22  is then fixed at a desired elevation with a bolt  15  passing through the holes (not shown) on the collar  22  and the lateral holes  16  of the vertical support member  5 . The tie off handle  17  is also used to attach a lifeline (not shown).  FIG. 6C  is a plan view of the bottom section of an embodiment of the fall protection system using a circular sliding collar  22 . The bottom U-bracket is attached to a collar  64 . The vertical position of the bottom U-bracket  12  adjustable by sliding the collar  64  along the vertical axis of the vertical support member  5 . To secure the bottom U-bracket  12  at a chosen vertical position on the vertical support member  5  the bottom U-bracket  12  a bolt  15  is passed through lateral holes  16 . 
         [0060]      FIGS. 7A  and B show an embodiment of the octagonal version of the fall protection system. In this embodiment the movable attachment means comprises an octagonal sliding collar  24  and one or more tie off handles  17 . The octagonal vertical support member  5  has built in T-shaped grooves  25  on its sides. The octagonal sliding collar  24  has T-shaped extensions  26  on its sides extending inward towards the octagonal vertical support member  5 . The T-shaped extensions  26  are designed to fit into the T-shaped grooves  25  in the octagonal vertical support member  5 . The octagonal sliding collar  24  has an opening  23  on its rear side facing the top U-bracket  11  to provide sufficient space between the octagonal sliding collar  24  and the top U-bracket  11  to enable the collar  24  to pass the top U-bracket  11 . The octagonal sliding collar  24  is movable up or down on the vertical support member  5  using either of the tie off handles  17 . To fix the octagonal sliding collar  24  at a desired elevation, set screws  27  are used. The vertical position of the bottom U-bracket  12  along the vertical support member  5  is adjustable to accommodate different size scaffold frames. To secure the bottom U-bracket  12  at a chosen vertical position on the vertical support member  5  the bottom U-bracket  12  is bolted in place using to the lateral holes  16 . 
         [0061]    In the embodiments of the present invention in which movable attachment means are used, the vertical support members or movable attachment means are not limited to those illustrated in the examples above. Any configuration of vertical support members and movable attachment means can be used in these embodiments so long as the vertical support members provide support for a lifeline and the attachment means can be securely yet movably attached to the vertical support members to allow height adjustment of the lifeline. 
         [0062]    The present invention can also be practiced using vertical support members in which the attachment means for the lifeline are fixed structures along the vertical axis of the vertical support members. An embodiment of the invention using fixed attachment means for the lifeline is shown in  FIG. 11 . The vertical support member  5  has a top U-bracket  11 , a bottom U-bracket  12 , and attachment loops  42 . The attachment loops  42  are used to attach the lifeline (not shown here). Examples of other structures or devices that can be used to attach a lifeline are hooks, rings or any other device or structure known in the art so long as the structure of device can be used to securely attach a lifeline. In the embodiment illustrated in FIG. lithe height of the lifeline (not shown here) is adjusted by attaching the lifeline to different attachment loops  42  positioned along the vertical axis of the vertical support member  5 . 
         [0063]    In a particularly advantageous embodiment the fall protection system uses a deflector post  30  to go around turns and corners as shown in  FIGS. 8A-C . The deflector post  30  has an upper roller portion  29 . Ideally, the roller  29  is tapered on top to keep the lifeline in place. Preferably, the roller  29  is made out of material that reduces friction. In one particularly preferred embodiment the roller  29  is made out of Teflon. On its bottom end the deflector post  30  has a deflector post U-bracket  34  adapted to mount the post on top of a scaffold frame. The deflector post  30  is fixable on the scaffold by using a bolt extending through a lateral hole  33  in the deflector post U-bracket  34 . In addition, the deflector post  30  has a brace  31  extending at an angle from approximately the middle portion of the post downwards. The preferred angle between the deflector post and the brace is 45°. At its distal end the brace  31  has a brace U-bracket  35  with a lateral hole  41  that is used to fix the brace  31  to the scaffold frame. Thus, when mounted the deflector post  30  is fixed to at least two points of the scaffold. The U-brackets  34  and  35  are examples to illustrate a convenient way to affix the deflector to the scaffold frame. However, other devices of affixing the deflector can be used to practice the invention. Other examples of devices that can be used to secure the deflector  30  to the scaffold include clamps, clasps, vises, nut &amp; bolt arrangements, fasteners, grips, or quick-release snap clamps. Any attachment can be used so long as the deflector is securely attached to the scaffold. 
         [0064]      FIG. 9  shows an embodiment of the fall protection system with ladder  28 . The ladder  28  is secured to the vertical support member  5  with bolts  44  that extend through lateral holes  45  in the ladder  28  and lateral holes  16  in the vertical support member  5 . The vertical support member shown in  FIG. 9  has T-plates  9  as movable attachment means. The ladder  28  helps employees to easily gain access to the next scaffold level. While  FIG. 9  depicts a particular type of ladder, other ladder types of various designs can be used to practice the invention. 
         [0065]      FIGS. 10A and 10B  show an embodiment of the fall protection system with rope grab device  39  as additional failsafe. A rope grab attachment means  51  is attached to the rear upper portion of the vertical support member  5 . The rope grab attachment means  51  extends vertically past the upper end of the vertical support member  5  and has a shackle  50  connected to its upper end. The shackle  50  is connected to the rope grab device  39 . Ideally, the rope  38  is secured to the top of a building or structure around which the scaffold is built. The rope  38  runs through the rope grab device  39  and the vertical support member  5 . In case the vertical support member  5  becomes detached from the scaffold structure and falls down, the rope grab device  39  tightens and prevents further downward movement of the vertical support member  5 . The rope grab mechanism  39  can be attached to the vertical support member  5  using different attachment means. The rope grab mechanism  39  can also be attached directly to the vertical support member  5  for example by welding the rope grab mechanism  39  directly to the top of the vertical support member  5 . In fact, any means for attaching a rope grab mechanism  39  to the vertical support member  5  can be used so long as the rope grab mechanism  39  remains firmly attached to the vertical support member  5  in case of a fall and so long as the rope  38  can run through the rope grab mechanism  39  and the vertical support member  5 . 
         [0066]      FIG. 10C  shows an embodiment of the fall protection system with shock absorber  58 . The shock absorber  58  engages the safety rope  38  through shock absorber attachment means  59  such that the portion of the safety rope  38  that extends through the vertical support member  5  is suspended from the bottom portion of the shock absorber  58 .  FIG. 10A  also shows brace attachment means  53 . The brace attachment means  53  is attached to the upper rear portion of the vertical support member  5  such as to provide sufficient space for the movable attachment means (not shown here) to pass. The shock absorber  58  can be any device known in the art designed to absorb kinetic energy from a falling person, equipment or other object. The shock absorber attachment means  59  can be hooks, cable clamps, carabiners or any device or arrangement so long as the attachment means securely connect the shock absorber  58  to the safety rope  58  to withstand the force exerted on it by a fall and accidental disengagement of the vertical support member  5  from the scaffold structure. 
         [0067]      FIG. 12A-D  show an embodiment of the fall protection system with adjustable brace  54 . To prevent the vertical support member from moving sideways in case of a fall the adjustable brace  54  is secured to the scaffold frame  2  and the vertical support member  5 . On its bottom end the adjustable brace  54  is secured to the scaffold frame  2  with U-bracket  55  using a bolt  56 . On its top end the adjustable brace  54  is connected to the upper portion of the vertical support member  5  through brace attachment means  53 . The brace attachment means  53  is connected to the rope grab attachment means  51  such as to provide sufficient space for the movable attachment means (not shown here) to pass. The adjustable brace  54  comprises an upper section  61  and a lower section  62 . Both sections are movable along each others longitudinal axes and can be secured at a desired position by set bolts  57 . The brace attachment means  53  can be a metal plate or any structure or device to allow the adjustable brace  54  to be securely attached to the vertical support member  5 . 
         [0068]    Use of the fall protection system during scaffold construction is convenient and straight forward.  FIG. 13  illustrates steps how to use the fall protection system during scaffold erection. 
         [0069]    First, the scaffold base level  46  is installed on the ground or on an existing scaffold level. A platform  4  is then installed and the erectors will climb to the platform  4 . A vertical support member  5  is then installed at each end of the scaffold base level  46 . After the vertical support members  5  are installed, a first lifeline  6  is attached to the movable attachment means  47 . Scaffold erectors then tie off to the first lifeline  6  and assemble the second level of the scaffold. After the second level  48  of the scaffold is completed, a second lifeline  49  is laid out across the top platform. The scaffold erectors then tie off to the scaffold, move the vertical support members  5  up, affix the vertical support members  5  at the structure of the second scaffold level  48  and climb to the second level  48 . The position of the movable attachment means  47  is then adjusted with the top of the scaffold frame of the second level  48 . The second lifeline  49  is then attached to the unused movable attachment means  47 . Erectors now tie off to the second lifeline  49  and start erecting the next scaffold level. The first lifeline  6  is used to lie across the next platform. 
         [0070]    While the invention has been illustrated and described as embodied in a scaffold fall protection system, it is not intended to be limited to the details shown since various modifications and structural changes may be made without departing in any way from the spirit of the present invention. The embodiments were chosen and described in order to best explain the principles of the invention and practical application to thereby enable a person skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated.

Technology Classification (CPC): 4