The present disclosure is directed to steel buildings and the construction thereof. More specifically, the present disclosure relates to a fall protection cable system for roofing installation on steel buildings and a method of use and installation thereof.
Generally speaking, a steel building is a metal structure fabricated with steel for the internal support and for exterior cladding, as opposed to steel framed buildings which generally use other materials for floors, walls, and external envelope. Steel buildings are used for a variety of purposes including storage, work spaces and living accommodation. They are classified into specific types depending on how they are used.
Steel provides several advantages over other building materials, such as wood. Steel is structurally sound and manufactured to strict specifications and tolerances. Any excess material is 100% recyclable. Steel does not easily warp, buckle, twist or bend, and is therefore easy to modify and offers design flexibility. Steel is also easy to install, is cost effective, and rarely fluctuates in price. Steel also allows for improved quality of construction and less maintenance, while offering improved safety and resistance. Furthermore, with the propagation of mold and mildew in residential buildings, using steel versus wood minimizes these infestations, as mold needs moist, porous material to grow and steel studs do not have those problems.
Some common types of steel buildings are “straight-walled” and “arch,” or Nissen or Quonset hut. Further, the structural type may be classed as clear span or multiple spans. A clear span building does not have structural supports (e.g. columns) in the interior occupied space. Straight-walled, and arch type, refer to the outside shape of the building. More generally, these are both structural arch forms if they rely on a rigid frame structure. However, curved roof structures are typically associated with the arch term. Steel arch buildings may be cost efficient for specific applications. They are commonly used in the agricultural industry. Straight-walled buildings provide more usable space when compared to arch buildings. They are also easier to blend into existing architecture. Straight-walled buildings are commonly used for commercial, industrial, and many other occupancy types. Clear span refers to the internal construction. Clear span steel buildings utilize large overhead support beams, thus reducing the need for internal supporting columns. Clear span steel buildings tend to be less cost efficient than structures with interior columns. However, other practical considerations may influence the selection of framing style, such as occupancy, where interior structural obstructions are undesirable (e.g. aircraft hangars or sport arenas). Long Bay buildings are designed for use in bay spans of over 35′. They use prefabricated metal frames combined with conventional joists to provide larger openings and clearances in buildings.
There are five main types of structural components that make up a steel frame: tension members, compression members, bending members, combined force members and their connections. Tension members are usually found as web and chord members in trusses and open web steel joists. Ideally tension members carry tensile forces, or pulling forces, only and its end connections are assumed to be pinned. Pin connections prevent any moment (rotation) or shear forces from being applied to the member. Compression members are also considered as columns, struts, or posts. They are vertical members or web and chord members in trusses and joists that are in compression or being squished. Bending members are also known as beams, girders, joists, spandrels, purlins, lintels, and girts. Each of these members have their own structural application, but typically bending members will carry bending moments and shear forces as primary loads and axial forces and torsion as secondary loads. Combined force members are commonly known as beam-columns and are subjected to bending and axial compression. Connections are what bring the entire building together. They join these members together and must ensure that they function together as one unit.
One problem that has been discovered with the construction of steel buildings is the dangers associated with roofing or installation of the roofing panels on the steel building structure. During this process, the roof installers are positioned at elevated heights above the ground to install the roofing panels where they may be required to balance or hang over or on an edge, a beam, the like, etc. Although the roof installers may be required to be tied off during this roofing process, this is not practical during a lot of times of the roofing process, as this tying off process is difficult in certain locations and extremely time consuming. This difficulty in tying off leads to a significant risk of falling as the roof installers complete the installation of roofing panels which can lead to serious injury or even death. As such, there is clearly a need to provide a means or system that is easier and less time consuming to allow roof installers to be tied off during the entire roofing process.
The present disclosure may be designed to address at least certain aspects of the problems discussed above by providing a fall protection cable system for roofing installation on steel buildings and method of use and Installation thereof.
In accordance with at least selected embodiments, the instant disclosure may address at least certain aspects of the above mentioned needs, issues and/or problems and may provide a fall protection cable system. The fall protection cable system may be configured for installation of a roof on a steel building. The fall protection cable system may generally include a starting support post, a final support post, and a support cable. The starting support post may be configured for attachment to a first side of the steel building. The starting support post may have a bottom starting end configured to attach to the first side of the steel building and a top starting end extending above the roof on the first side of the steel building. The final support post may be configured for attachment to a second side of the steel building. The final support post may have a bottom final end configured to attach to the second side of the steel building and a top final end extending above the roof on the second side of the steel building. The support cable may be configured to be connected at an elevated position above the roof of the steel building between the top starting end of the starting support post attached to the first side of the steel building and the top final end of the final support post attached to the second side of the steel building.
One feature of the disclosed fall protection cable system may be that the support cable can be configured for allowing a roofing installer to tie off to the support cable at the elevated position above the roof during installation of the roof.
In select embodiments of the disclosed fall protection cable system, the starting support post may include a starting horizontal member and a starting vertical member. The starting horizontal member may have a starting plate at one end configured for attachment to the steel building. The starting vertical member may be rigidly attached to the starting horizontal member and may extend upward therefrom. The starting vertical member may extend at a starting slightly obtuse angle from the end of the starting horizontal member with the starting plate. As a result, the starting vertical member may be oriented slightly past vertical from the end of the starting horizontal member with the starting plate.
In other select embodiments of the disclosed fall protection cable system, the final support post may include a final horizontal member and a final vertical member. The final horizontal member may have a final plate at one end configured for attachment to the steel building. The final vertical member may be rigidly attached to the final horizontal member and extend upward therefrom. The final vertical member may extend at a final slightly obtuse angle from the end of the final horizontal member with the final plate. As a result, the final vertical member may be oriented slightly past vertical from the end of the final horizontal member with the final plate.
Another feature of the disclosed fall protection cable system may be that a spring deflection can be created under a load of the support cable, like when a roofing installer falls. This spring deflection can be created by a combination of the starting vertical member and the final vertical member being oriented slightly past vertical from one another, wherein the starting vertical member and the final vertical member are configured to bend toward each other under the load of the support cable when the roofing installer falls.
In other select embodiments of the disclosed fall protection cable system, the starting vertical member may be a 2-piece starting vertical member. This 2-piece starting vertical member may have a base starting vertical member and a telescoping starting vertical member. The telescoping starting vertical member may be configured to be inserted into the base starting vertical member for use in the fall protection cable system. The telescoping starting vertical member may also be configured to be removed from the base starting vertical member, like for transportation of the starting support post.
In other select embodiments of the disclosed fall protection cable system, the final vertical member may be a 2-piece final vertical member. The 2-piece final vertical member may have a base final vertical member and a telescoping final vertical member. The telescoping final vertical member may be configured to be inserted into the base final vertical member for use in the fall protection cable system. The telescoping final member may also be configured to be removed from the base final vertical member, like for transportation of the final support post.
In other select embodiments of the disclosed fall protection cable system, the starting support post may further include a starting ground anchor. The starting ground anchor may be connected from an another end of the starting horizontal member to ground via a starting concrete anchor plate affixed thereto. In select embodiments, the starting ground anchor may be connected to the another end of the starting horizontal member via a first eyebolt. In other select embodiments, the starting ground anchor may be connected to the starting concrete anchor via a starting turnbuckle cable connection. This starting turnbuckle cable connection may be configured for tensioning the starting ground anchor between the another end of the starting horizontal member and the ground.
In other select embodiments of the disclosed fall protection cable system, the final support post may further include a final ground anchor. The final ground anchor may be connected from an another end of the final horizontal member to ground via a final concrete anchor plate affixed thereto. In select embodiments, the final ground anchor may be connected to the another end of the final horizontal member via a third eyebolt. In other select embodiments, the final ground anchor may be connected to the final concrete anchor via a final turnbuckle cable connection. This final turnbuckle cable connection may be configured for tensioning the final ground anchor between the another end of the final horizontal member and the ground.
In other select embodiments of the disclosed fall protection cable system, the starting support post may further include a starting angled support member. The starting angled support member may be rigidly connect between the starting vertical member at a first support location and the starting horizontal member at the another end of the starting horizontal member opposite of the starting plate. The starting angled support member may be configured to support the starting vertical member under load of the support cable.
In other select embodiments of the disclosed fall protection cable system, the final support post may further include a final angled support member. The final angled support member may be rigidly connect between the final vertical member at a second support location and the final horizontal member at the another end of the final horizontal member opposite of the final plate. The final angled support member may be configured to support the final vertical member under load of the support cable.
In other select embodiments of the disclosed fall protection cable system, the starting support post may further include a cable winch, a pulley and a chain. The cable winch may be positioned on the starting angle support and connected to a first end of the support cable. The cable winch may be configured for creating a desired tension in the support cable between the starting support post and the final support post. The pulley may be at the top starting end of the starting support post configured to position the support cable at the top starting end of the starting support post while allowing the support cable to roll over the top starting end of the starting support post while being tensioned by the winch. The chain may be configured to connect the first end of the support cable to the another end of the starting horizontal member. This chain connection may be for removing the cable winch from the forces of the support cable. The chain may include an S-link at one end for removable connection to the first end of the support member. The chain may also be connected to the another end of the starting horizontal member via a second eyebolt.
In other select embodiments of the disclosed fall protection cable system, the final support post may further include a fourth eyebolt attached to the top final end of the final support post. The fourth eyebolt may be configured to connect to a second end of the support cable for fixing the support cable to the top final end of the final support post.
In other select embodiments of the disclosed fall protection cable system, the final support post may further include an optional shock absorber. The shock absorber may be connected between the fourth eyebolt and the second end of the support cable. The shock absorber may be configured to absorb the shock created in the support cable when under the load in the support cable from the roofing installer falling.
In select embodiments of the disclosed fall protection cable system, the starting support post and the final support post may be constructed from hollow structural section steel posts. The hollow structural section steel posts of the starting support post and the final support post may have, but are not limited to, a width of 2.5″, a depth of 2.5″, and a thickness of ¼″.
Another feature of the disclosed fall protection cable system may be that the starting support post and the final support post may be configured to position the support cable at the elevated position above the roof, including but not limited to, an elevated position of approximately 8 feet.
In select embodiments of the disclosed fall protection cable system, the system may further include at least one intermediate support post. The at least one intermediate support post may be positioned between the starting support post and the final support post. Each of the at least one intermediate support posts may include a base and a summit. The base may be configured to be positioned on the roof of the steel building at one end of the intermediate support post. The summit at the other end of the intermediate support post may be positioned at or approximate to the elevated position of the support cable. A passage at the summit of the intermediate support post may be configured for receiving the support cable therethrough. The passage may support the support cable at the elevated position above the roof at a support location of the intermediate support post. The support location of each of the at least one intermediate support posts may be positioned a set distance between the starting support post and the final support post. In select embodiments, the set distance may be, but is not limited to, between 50 feet and 150 feet.
In select embodiments of the disclosed fall protection cable system, the base of each of the intermediate support posts may be either a rigid base or a panel base. The rigid base may be configured to attach the intermediate support post directly to a roof beam of the steel building. The panel base may be configured to attach the intermediate support post on top of a roof panel already installed on the steel building. Wherein, the intermediate support posts may be configured to be changed from the rigid base to the panel base once the roof panel is installed on the steel building at the location of the intermediate support post. In select embodiments, the rigid base may include a bracket configured for bolting the base to the roof beam. In other select embodiments, the panel base of the intermediate support post may include an I-shaped beam with a center beam and two outer beams. The center beam may be rigidly connected to the base of the intermediate support post. The two outer beams may include channels configured to be inserted over standing seams of adjoining roof panels, where the two outer beams are configured to be rigidly attached to the standing seam of adjoining roof panels. The I-shaped beam may be adjustable from 16″ to 24″ roofing panels.
Another feature of the disclosed fall protection cable system may be the inclusion of personal protective equipment. The personal protective equipment may be configured for tying off the roofing installer to the support cable. In select embodiments, the personal protective equipment may include, but is not limited to, a harness, a lanyard, and a retractable lanyard.
In another aspect, the instant disclosure embraces the fall protection cable system configured for installation of a roof on a steel building in any of the various embodiments shown and/or described herein. In select embodiments, the disclosed fall protection cable system may include various combinations of the embodiments shown and/or described herein including, but not limited to, a combination of all of the various embodiment of the fall protection cable system shown and/or described herein.
In another aspect, the instant disclosure a method of installing a roof on a steel building with a fall protection cable system. In general, the disclosed method of installing a roof on a steel building includes utilizing the fall protection cable system in any of the various embodiments shown and/or described herein. Accordingly, in select embodiments, the method of installing a roof on a steel building includes providing the fall protection cable system in any of the various embodiments shown and/or described herein, including: a starting support post configured for attachment of a first side of the steel building, said starting support post having a bottom starting end configured to attach to the first side of the steel building and a top starting end extending above the roof on the first side of the steel building; a final support post configured for attachment to a second side of the steel building, said final support post having a bottom final end configured to attach to the second side of the steel building and a top final end extending above the roof on the second side of the steel building; a support cable configured to be connected at an elevated position above the roof of the steel building between the top starting end of the starting support post attached to the first side of the steel building and the top final end of the final support post attached to the second side of the steel building; and personal protective equipment configured for tying off the roofing installer to the support cable, the personal protective equipment including: a harness; a lanyard; and a retractable lanyard. The method of installing a roof on a steel building thus includes: attaching the starting support post to the first side of the steel building; attaching the final support post to the second side of the steel building; tensioning the support cable between the top starting end of the starting support post attached to the first side of the steel building and the top final end of the final support post attached to the second side of the steel building; and tying off a roof installer to the support cable via the personal protective equipment.
In select embodiments of the disclosed method of installing a roof on a steel building, wherein the fall protection cable system may further include an intermediate support post, the method may further include: attaching the intermediate support post to a roof beam at a set distance between the starting support post and the final support post; and supporting the support cable with the intermediate support post at the set distance between the starting support post and the final support post by inserting the support cable in a passage at a summit of the intermediate support post.
The foregoing illustrative summary, as well as other exemplary objectives and/or advantages of the disclosure, and the manner in which the same are accomplished, are further explained within the following detailed description and its accompanying drawings.
The present disclosure will be better understood by reading the Detailed Description with reference to the accompanying drawings, which are not necessarily drawn to scale, and in which like reference numerals denote similar structure and refer to like elements throughout, and in which:
It is to be noted that the drawings presented are intended solely for the purpose of illustration and that they are, therefore, neither desired nor intended to limit the disclosure to any or all of the exact details of construction shown, except insofar as they may be deemed essential to the claimed disclosure.
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Starting support post 16 may be included in fall protection cable system 10. Starting support post 16 may be for providing a structure on one side of steel building 14 for supporting support cable 114 at elevated position 116 above roof 12. Starting support post 16 may include any members, devices or mechanisms for supporting support cable 114 at elevated position 116 above roof 12 on first side 18 of steel building 14. Starting support post 16 may also be for providing a means for tightening support cable 114 to desired tension 60. Starting support post 16 may be configured for attachment to first side 18 of steel building 14, as shown in
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Final support post 72 may be included in fall protection cable system 10. Final support post 72 may be for providing a structure the opposite side of steel building 14 as starting support post 16 for supporting support cable 114 at elevated position 116 above roof 12. Final support post 72 may include any members, devices or mechanisms for supporting support cable 114 at elevated position 116 above roof 12 on second side 74 of steel building 14. Final support post 72 may be configured for attachment to second side 74 of steel building 14, as shown in
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Starting support post 16 and final support post 72 may be constructed from various desired materials to handle load 128 of roofing installer 130 falling while tied off to support cable 114. In select embodiments, starting support post 16 and final support post 72 may be made from hollow structural section steel posts 136. For examples, and clearly not limited thereto, in select embodiments, hollow structural section steel posts 136 of starting support post 15 and final support post 72 may have, but are not limited to, width 138 of 2.5″ or approximate thereto, depth 140 of 2.5″ or approximate thereto, and/or thickness 142 of ¼″ or approximate thereto. As an example, and clearly not limited thereto, starting support post 16 and final support post 72 may be HSS 3×3× 3/16. Starting support post 16 may be attached to rafters of steel building 14 using (2) ¾″ bolts through starting plate 26 and final plate 82, which may provide a 15,000 pound anchorage point. Cable winch 56 may have a 2,000 pound pull capacity. And chain 64 may be grade 43, 5/16 thick, providing 3,900 pounds break strength. This example may be enough for two roofing installers 130 to fall at the same time, because 1,800 pounds per person may be required.
Support cable 114 may be included with fall protection cable system 10. See
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One feature of the disclosed fall protection cable system 10 may be that support cable 114 can be configured for allowing roofing installer 130 to tie off to support cable 114 at elevated position 116 above roof 12 during installation of roof 12. This may allow roofing installer 130, or multiple roofing installers 130 to move rather freely around on top of roof 12 during installation.
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In the specification and/or figures, typical embodiments of the disclosure have been disclosed. The present disclosure is not limited to such exemplary embodiments. The use of the term “and/or” includes any and all combinations of one or more of the associated listed items. The figures are schematic representations and so are not necessarily drawn to scale. Unless otherwise noted, specific terms have been used in a generic and descriptive sense and not for purposes of limitation.
The foregoing description and drawings comprise illustrative embodiments. Having thus described exemplary embodiments, it should be noted by those skilled in the art that the within disclosures are exemplary only, and that various other alternatives, adaptations, and modifications may be made within the scope of the present disclosure. Merely listing or numbering the steps of a method in a certain order does not constitute any limitation on the order of the steps of that method. Many modifications and other embodiments will come to mind to one skilled in the art to which this disclosure pertains having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Although specific terms may be employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation. Accordingly, the present disclosure is not limited to the specific embodiments illustrated herein, but is limited only by the following claims.
This application claims benefit of priority application, U.S. Provisional Ser. No. 62/735,718 filed Sep. 24, 2018 entitled “Fall Protection Cable System For Roofing Installation on Steel Buildings and Method of Use and Installation Thereof”, which is incorporated herein by reference in its entirety.
Number | Date | Country | |
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62735718 | Sep 2018 | US |