Truss-mounted rooftop fall protection system
A J-shaped stanchion which attaches to a roof truss (or rafter) in such a manner as to enable the entire girth of the roof truss overhang (or rafter) to be the sole support for the stanchion. The stanchion is designed to bend below the fascia and return up above the roof surface where successive stanchions similarly attached are connected via a fall protection guardrails providing fall protection for all workers. This single point of attachment allows the carpenters to attach the stanchions prior to hoisting the trusses onto the roof bearing walls. As soon as the trusses are properly braced, the guardrails can be hoisted and secured.
This is a continuation-in-part of U.S. Application Ser. No. 11/177,009, filed Jul. 7, 2005, the disclosure of which is hereby incorporated by reference herein.
BACKGROUND OF THE INVENTION1. Field of the Invention
The present invention relates to fall protection devices and systems which are attached to roofs of structures under construction. More particularly, this invention relates to fall protection devices and systems which are mounted on trusses or rafters of structures under construction, but are not attached to the fascia of such structures.
2. Description of the Background Art
The Occupational Safety and Health Act mandates that every trade who must build or stand on a roof surface should have fall protection. At the very minimum a slide guard should be in place to protect the worker. The minimum slide guard is described as a two by four nominal dimension member secured on its edge to the roof below the worker to arrest his possible slide. Many trades must stand on a sloped roof to accomplish their work. Tradesmen include framing carpenters and roofers. For multi-storied structures, other tradesmen may include window installers, house wrap installers, siding installers, exterior trim carpenters, soffit installers, lathers and stucco crews.
In practice, the framing carpenter installs a slide guard on the roof surface, but it is often promptly removed when the framing is finished since it becomes an obstacle to some subsequent trades. Moreover, the guards are seldom replaced. There therefore exists a need to overcome the shortcomings of conventional fall protection devices.
Prior art include stanchions which attach to a truss below the roof line and to the fascia to dip down below the fascia and then up above the roof. Thus, the prior art cannot be employed in buildings designed with no fascia. Further, even though the buildings are designed with fascia, damage may occur where the fascia is the finished product. Still further, where the roofing requires a metal eave drip to the fascia to be installed before roofing, the connection to the fascia may have to be removed, thus rendering the prior art inoperable. Finally, the prior art cannot be properly attached until the fascia is constructed. Hence, there has existed a need for a fall protection device that does not require a mechanical attachment to fascia.
Representative prior art include U.S. Pat. Nos. 6,345,689; 5,221,076; 5,353,891; 5,573,227; 5,570,559; 4,666,131; 5,067,586; 4,669,577; 3,901,481; and 4,359,851.
Therefore, it is an object of this invention to provide an improvement which overcomes the aforementioned inadequacies of the prior art devices and provides an improvement which is a significant contribution to the advancement of the fall protection art.
Another object of this invention is to provide a fall protection system that attaches to a roof truss at a single point in such a manner as to extend below the fascia and return up above the roof surface such that the carpenters may attach the stanchions prior to hoisting the trusses onto the roof-bearing walls, or immediately thereafter, and then install the guardrails such that the workers are protected throughout the entire construction process.
Another object of this invention is to provide a fall protection system having various constructions for connecting the J-shaped stanchions to a roof truss, optionally including a separate attachment bracket that may be pre-installed onto the truss during fabrication of the truss at the factory to which the J-shaped stanchion is then removably connected during assembly on the job site.
Another object of this invention is to provide a fall protection system which is economical to manufacture while supporting the minimum impact of two hundred pounds (200 lbs.) required by OSHA for a slide guard or guard rail.
Another object of this invention is to provide a fall protection system including a J-shaped stanchion that is extendible to allow additional rows of guard rails to be installed.
The foregoing has outlined some of the pertinent objects of the invention. These objects should be construed to be merely illustrative of some of the more prominent features and applications of the intended invention. Many other beneficial results can be attained by applying the disclosed invention in a different manner or modifying the invention within the scope of the disclosure. Accordingly, other objects and a fuller understanding of the invention may be had by referring to the summary of the invention and the detailed description of the preferred embodiment in addition to the scope of the invention defined by the claims taken in conjunction with the accompanying drawings.
SUMMARY OF THE INVENTIONFor the purpose of summarizing this invention, this invention comprises a fall protection system including a J-shaped stanchion which attaches to a roof truss (or rafter) in such a manner as to enable the entire girth of the roof truss overhang (or rafter) to be the sole support for the stanchion. The J-shaped stanchion is designed to exceed the 200 pound minimum impact currently required by OSHA for a slide guard or guardrail. The J shape of the stanchion is configured to extend below the fascia and return up above the roof surface. During assembly, a plurality of stanchions is attached along the roof line. Horizontal fall protection guardrails are then connected to the upstanding stanchions thereby providing fall protection for workers. Notably, the single point of attachment to the trusses along the roof line allows the carpenters to attach the stanchions prior to hoisting the trusses onto the roof bearing walls. As soon as the trusses are properly braced, the guardrails can be hoisted and installed. Furthermore, the trusses may optionally be fabricated with a separate attachment bracket to which the J-shaped stanchion is removably connected. This feature of the preferred embodiment has the potential of protecting workers during the entire construction process of the structure which involves working on the roof. When all workers are safely off the roof, the stanchions may be easily removed and reused.
The foregoing has outlined rather broadly the more pertinent and important features of the present invention in order that the detailed description of the invention that follows may be better understood so that the present contribution to the art can be more fully appreciated. Additional features of the invention will be described hereinafter which form the subject of the claims of the invention. It should be appreciated by those skilled in the art that the conception and the specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the invention as set forth in the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGSFor a fuller understanding of the nature and objects of the invention, reference should be had to the following detailed description taken in connection with the accompanying drawings in which:
Similar reference characters refer to similar parts throughout the several views of the drawings.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawing of
Referring next to
Stanchions 1 are respectively installed on respective roof trusses 11 along the horizontal roof edge 18. The strength of this attachment is due to the envelopment of the roof truss 11 between the upper rear flange of attachment bracket 2A, the upper front flange of attachment bracket 2B and the lower flange of attachment bracket 2D adjacent the center web 2C causing the entire truss 11 to react as one with stanchion 1 on impact. The lower portion of the stanchion 1 is bent 180 degrees from its end 17 such that the guardrail brackets 3 are perpendicular to the plane of the roof regardless of the roof pitch.
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The operation of the preferred embodiment of the invention is as follows. Referring to
The lock bracket 21 may be tethered to the attachment bracket 2 by a chain or other member to minimize the possibility of it being lost and inadvertently not used. Furthermore, to assure that the lock bracket 21 may not slide off, a headed stop pin 24 may be inserted into a hole in the lower plate 2D to block the lock bracket 21 from being removed. The stop pin 24 may likewise be tethered to the attachment bracket 2 to prevent inadvertent loss or nonuse.
Ground level installation of the fall protection device stanchion 1 greatly reduces the work time involved in assembly, and allows the system to be substantially assembled prior to the workman being in peril. Immediately after the rafter, roof truss, or roof member 11 is hoisted onto structure 15, the horizontal slide arrest guardrail 5 can be hoisted up and secured. Therefore, fall protection can be in position prior to the installation of the first sheathing/roof decking and if used until all roof operations are complete, it will provide the absolute time maximum uninterrupted fall guard protection possible.
The process of ground level installation, although preferred, does not limit the attachment of the fall protection stanchion 1 in other situations, such as existing structures, or in conventional framing, i.e., framing in which the construction of the structure must be built in the field, on the job site, such as hips, dormers, or any other roof or balcony configuration as is known to one of ordinary skill in the art. Such alternative attachments may require the use of additional equipment (ladders, scaffolding, lift equipment, etc.).
Optional dimensions of attachment bracket 2 are available to accommodate other nominal sizes of rafters, roof trusses, roof members 11, or for any architecturally specified size rafter, roof truss, or roof member 11.
Once stanchion 1 is properly attached to the rafter, roof truss, or roof member 11, and the rafter, roof truss, or roof member 11 is properly affixed to building 15 and the slide arrest guardrails 5 are installed, a continuous barrier around the perimeter of the roof is formed. Such guardrails 5 may be composed of a nominal 2×4 or greater wood plank, a metal member, a crossbar, a rope, a strap, mesh netting or any known equivalent. The slide arrest guardrail 5 may be strung or inserted through the slide arrest guard bracket 3 and may be optionally fixed in place by means of nailing, screwing, welding, strapping, gluing, or bolting the strap to the bracket 3, such nails, screws, bolts and equivalents, passing through the orifices 4 in the bracket 3.
The stanchions 1 are secured to adjacent manufactured rafter, roof trusses or roof member 11 at horizontal roof edge 18, they extend down below the fascia 6 location and up above the horizontal roof edge 18 where the 2×4 wood plank, metal member, crossbar, mesh netting or any known equivalent, horizontal slide arrest guardrail 5 is attached to the guard rail bracket 3 by means of nailing, screwing, welding, strapping, gluing, bolting, or any known equivalent and thus becomes the barrier which a sliding workman would contact thus preventing the workman from sliding off of the roof.
This fall protection device stanchion 1 attaches directly to the truss tail, and does not touch the fascia 6; therefore there is no interference with the process of snapping a line from the first rafter, roof truss, or roof member 11, to the last rafter, roof truss, or roof member 11, for the purpose of determining which horizontal roof edges 18, do not line up. At this point the roof edge 18 can be saw cut straight for a square cut 6, or plumb cut 6, fascia without interference from the fall protection device stanchion 1, thus allowing the attachment of the fascia 6. Due to the encompassing features of the attachment bracket 2, fascia optional architecture (open design with no fascia) still allows continuous fall protection for workman.
The continuous row of the J shaped stanchions 1 mounted along the horizontal roof edge 18, allows a useful area in their inner radii for the temporary support of long stock materials, (i.e., fascia stock material or sub fascia stock material) thus providing a safer environment for the installation of the fascia 6. Once the fascia 6 is attached and horizontal slide arrest guardrail 5 is properly fastened by nailing, screwing, welding, strapping, gluing, bolting, or any known equivalent; the sheathing process may begin. Therefore the safety of workers is enhanced even before stanchion 1 begins providing fall protection.
Depending on the pitch and or overall size of a roof, OSHA requires additional slide guards at specific intervals going up the roof. As the sheathing or roofing progresses the stanchion 1 can be used as a brace against which a grid of additional 2×4 supports and slide guards can be constructed with ininimal or no penetration of the roofing surface.
The fall protection device stanchion 1 remains attached to the rafter, roof truss, or roof member 11 thus allowing all trades which may have to work on the roof surface, such as framers, roofers, plumbers, HVAC, electricians, window installers, siding installers, soffit installers, etc. to complete all work necessary while assuring continuous fall protection for all workman.
The attachment bracket 2 encompasses the rafter, roof truss, or roof member overhang 11, in such a manner as to allow the girth of the rafter, roof truss, or roof member 11 to support the fall protection device stanchion 1. This strong connection is suitable for attachment of additional devices such as stanchion extensions with additional guard rails, proprietary or others, and may be fastened by means of nailing, screwing, welding, strapping, gluing, bolting, or any known equivalent.
The fall protection device stanchion 1 attaches only to the rafter, roof truss, or roof member 11 and therefore does not interfere with the exterior finishes such as siding, lath, stucco, paint, trim, or other exterior claddings.
The fall protection stanchion 1 becomes suitable for additional devices such as bracket arm extensions 21 with additional nets, rope, cables, straps or any known equivalents. Additional ropes, cables, straps, harnesses or any known equivalent may be attached tied, strapped, clamped or any known equivalent to the fall protection stanchion 1 or harness ropes may be placed over the crown of the roof to a stanchion on the opposing side for support of the workers on the roof.
The fall protection stanchion 1 can be used to support any number of other devices such as Jacob's ladders, swings, swinging scaffolds, roof jacks, safety harnesses (for workman and materials) ropes, pulleys, beams, and cables upon which to hang lights, drapes or any known equivalent.
The attachment bracket 2 is preferably double-sided and can be used on either side of any given roof truss, rafter, or roof member 11. Furthermore, the fall protection system is economical, has little or no moving parts, is sturdy, requires nominal if any maintenance, and provides value far beyond the cost to build install and maintain. Lastly, the device easily and safely removed and is fully reusable.
Referring now to
It is noted that in re-roofing applications, the roofing plywood is already nailed to the trusses 11 and therefore, it would be difficult to force the upper rear and front flanges 2A and 2B therebetween. Accordingly, in order to facilitate forcing the flanges 2A and 2B between the roofing plywood and the truss 11, as shown in
It is noted that in some applications, it may be desirable to have the J-shaped stanchion removably connected to the attachment bracket 2. For example, as shown in
As noted above, the attachment bracket 2 may be factory-installed or installed on the job site. In either case, the attachment bracket 2 with a removable connection may be used as a way of removably connecting modified stanchion members 42 to the attachment bracket 2 via the boss 34 and fastener 40 that engages into corresponding holes 36 and 38. More particularly, as shown in
Without departing from the spirit and scope of the invention it should be appreciated that
The present disclosure includes that contained in the appended claims, as well as that of the foregoing description. Although this invention has been described in its preferred form with a certain degree of particularity, it is understood that the present disclosure of the preferred form has been made only by way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention.
Claims
1. A fall protection system comprising:
- a stanchion comprising a J-shaped configuration;
- an attachment bracket connected to said stanchion, said attachment bracket comprising a center web to which is connected an upper rear flange, an upper front flange and a lower flange; and
- a guardrail mounted to said stanchion.
2. The fall protection system as set forth in claim 1, wherein said stanchion comprises a guardrail bracket to which said guardrail is mounted.
3. The fall protection system as set forth in claim 1, wherein said attachment bracket is double-sided.
4. The fall protection system as set forth in claim 1, wherein said attachment bracket is single-sided.
5. The fall protection system as set forth in claim 1, wherein said center web includes an orifice through which a fastener may be inserted for connecting said center web to a roof member.
6. The fall protection system as set forth in claim 1, wherein said attachment bracket is removably connected to said stanchion.
7. The fall protection system as set forth in claim 6, further including a boss that removably connects with said stanchion.
8. The fall protection system as set forth in claim 1, wherein said guardrail comprises a plank.
9. The fall protection system as set forth in claim 8, further including stacked attachment brackets for securing overlapping planks.
10. The fall protection system as set forth in claim 1, wherein said J-shaped stanchion is configured to extend substantially perpendicularly relative to a roof to which the attachment bracket is connected.
11. The fall protection system as set forth in claim 2, wherein a plurality of said stanchions are connected to trusses of a building whereupon guardrails are then mounted to the stanchions along the roof line of the building.
12. The fall protection system as set forth in claim 2, wherein said stanchion further comprises an extended stanchion with at least one guardrail bracket allowing installation of additional rows of guardrails.
13. The fall protection system as set forth in claim 12, wherein said extended stanchion is removably connected to said stanchion.
14. The fall protection system as set forth in claim 1, further including a lock bracket for securely attaching the attachment bracket to a roof.
15. The fall protection system as set forth in claim 14, wherein said lock bracket comprises a generally L-shaped configuration having an inturned end which engages said lower flange of said attachment bracket.
16. The fall protection system as set forth in claim 1, further comprising an extended stanchion composed of a plank to which said guardrails may be mounted thereto, said plank being connected to said stanchion by a connector.
17. The fall protection system as set forth in claim 1, wherein one or both of said upper flanges comprise a pointed configuration.
18. The fall protection system as set forth in claim 1, wherein said center web comprises a plurality of barbs.
19. The fall protection system as set forth in claim 18, wherein said barbs extend on both sides of said center web.
20. The fall protection system as set forth in claim 1, wherein said J-shaped stanchion may be replaced by a modified stanchion for supporting an object such as a satellite dish, a hook, a flag pole, or a basketball backboard.
21. A fall protection system comprising:
- a stanchion comprising a J-shaped configuration;
- an attachment bracket connected to said stanchion, said attachment bracket comprising two upstanding members forming a U-shaped channel for receiving a roof member; and
- a guardrail mounted to said stanchion.
22. The fall protection system as set forth in claim 21, wherein one or both of said upstanding members comprises at least one barb that engages into the roof member.
23. The fall protection system as set forth in claim 22, wherein said attachment bracket is removably connected to said stanchion.
24. The fall protection system as set forth in claim 23, further including a boss that removably connects with said stanchion.
25. The fall protection system as set forth in claim 21, wherein said guardrail comprises a plank.
26. The fall protection system as set forth in claim 25, further including stacked attachment brackets for securing overlapping planks.
27. The fall protection system as set forth in claim 21, wherein said J-shaped stanchion is configured to extend substantially perpendicularly relative to the member to which the attachment bracket is connected.
28. The fall protection system as set forth in claim 21, wherein a plurality of said stanchions are connected to the trusses of a building whereupon one or more guardrails are then mounted to the stanchions along the roof line of the building.
29. The fall protection system as set forth in claim 21, wherein said stanchion further comprises an extended stanchion to which is mounted said guardrails allowing installation of additional rows of guardrails.
30. The fall protection system as set forth in claim 29, wherein said extended stanchion is removably connected to said stanchion.
31. The fall protection system as set forth in claim 21, further comprising an extended stanchion composed of a plank to which said guardrail may be mounted thereto, said plank being connected to said stanchion by a connector.
32. The fall protection system as set forth in claim 21, wherein said J-shaped stanchion may be replaced by a modified stanchion for supporting an object such as a satellite dish, a hook, a flag pole, or a basketball backboard.
Type: Application
Filed: Jan 10, 2006
Publication Date: Jan 25, 2007
Inventors: Rafael Martinez (Tampa, FL), Joseph Martinez (Brandon, FL), James Harrison (Lithia, FL)
Application Number: 11/329,404
International Classification: E04C 1/00 (20060101);