The present disclosure generally relates to systems and methods for scaffolding systems for use with curvilinear walls. More particularly, the present disclosure relates to scaffolding which fits about the curved wall of a holding tank and which can be readily moved to varying heights of the holding talk wall.
Scaffolding systems, or staging, are well known, originating in ancient times. It provides a temporary structure of sufficient strength to safely support workers at elevated heights in construction and repair. The use of horizontally-aligned lateral support members and longitudinal work surfaces arose during ancient times. At the beginning of the 20th century, changes included the use of mechanical means to maintain the scaffolding parts in position, particularly the development of the Universal Coupler, the use of tubular steel pipes instead of wooden poles, the standardization of scaffolding dimensions, and the use of diagonal bracings. Scaffolding today uses those couplers, in connection with tubes and boards, to provide a rectilinear structure which abuts a rectilinear wall.
Traditional scaffolding systems, however, are not well-suited for use in connection with curvilinear surfaces, such as buildings, whose surfaces are curved for architectural aesthetics, and storage tanks, whose surfaces are curved to address the internal pressures and avoid stress concentrations. While traditional scaffolding can be positioned adjacent the entirety of the work surface of a rectilinear wall, traditional scaffolding provides, at best, a point of tangency with a curvilinear surface, and increasing gaps along the scaffolding surface thereafter between the work surface and the boards.
Standard components to address a curvilinear wall are not commercially available. There are no “off the shelf” reusable scaffolding systems, particularly for use with the erection of storage tanks and their curved planes. Instead, a custom fabricated plate scaffold must be constructed, which is job specific and which thereafter is scrapped or must be reconstructed with modifications for the next use. In such systems, the gap between the work surface and the boards is reduced by the use of shorter traditional boards and a shorter support structure, but such a system becomes cumbersome as the number of components increase and is limited to a particular radius. It is also known that the scaffolding may be somewhat fitted about a curvilinear surface by the use of planks which are pivotally attached to one another, which still provides a point of tangency and increasing gaps on each side thereof. Such gapping provides unsafe work conditions.
Traditional board and bracket tank building systems are antiquated, labor intensive, and unsafe in light of today's safety standards. The currently available scaffolding systems for concrete wall tank construction are heavy, burdensome, and cannot be replicated on the metal tank side of a double wall containment tank. The resulting gaps between board and wall permit dropped objects to fall below the work surface and potentially onto those below. The workspace is often further cluttered with the supporting hoses and power cables for tools used, as well as the tools themselves, all of which are positioned on the boards of the scaffolding systems. Moreover, repositioning of such scaffolding may require complete disassembly, repositioning, and reassembly, requiring substantial manpower and resulting in downtime.
The present disclosure is described below with references to the accompanying drawings in which like elements are referenced with like reference numerals, and in which:
The subject matter of the present disclosure is described with specificity, however, the description itself is not intended to limit the scope of the disclosure. The subject matter thus, might also be embodied in other ways, to include different structures, steps and/or combinations similar to and/or fewer than those described herein, in conjunction with other present or future technologies. Although the term “step” may be used herein to describe different elements of methods employed, the term should not be interpreted as implying any particular order among or between various steps herein disclosed unless otherwise expressly limited by the description to a particular order. Other features and advantages of the disclosed embodiments will be or will become apparent to one of ordinary skill in the art up examination of the following figures and detailed description. It is intended that all such additional features and advantages be included within the scope of the disclosed embodiments. Further, the illustrated figures are only exemplary and are not intended to assert or imply any limitation with regard to the environment, architecture, design, or process in which different embodiments may be implemented.
The present disclosure overcomes one or more deficiencies in the prior art by providing systems and methods for scaffolding which fits about the curved wall of a holding tank and which can be readily moved to varying heights of the holding talk wall and may be used on any structure regardless of linear, curving, or recurving surfaces, or with combinations thereof, such as walls, storage tanks, buildings, and monuments.
In one embodiment, the present disclosure includes scaffolding system having a first decking with a first decking body having a first decking body first edge, a first decking body second edge, a first decking body third edge, and a first decking extension plate affixed to the first decking body at a first decking body top surface, a first decking extension plate capture member, and a receiver, where the first decking extension plate capture member is found on the decking extension plate bottom surface where first decking extension plate extends beyond the first decking body third edge, and where the receiver, found on at the first decking body top surface, is sized to receive the first decking extension plate capture member.
In another embodiment, the present disclosure a scaffolding system having a first decking having a first decking body, a first decking first capture member and a first decking second capture member, a first decking central axis, a first decking body lateral axis, a first decking body first edge, a first decking body second edge, a first decking body third edge, a first decking body top surface, and a first decking body bottom surface, such that the first decking body lateral axis is perpendicular to the first decking body central axis. The first decking first capture member is affixed to the first decking body intermediate the first decking body first edge and the first decking body central axis at the first decking body bottom surface at the first decking body lateral axis. The first decking second capture member is affixed to the first decking body intermediate the first decking body second edge and the first decking body central axis at the first decking body bottom surface at the first decking body lateral axis, wherein the end decking second capture member is distant the first decking first capture member by a capture member distance. The first decking has a first decking extension plate affixed to the first decking body at the first decking body top surface, which has a first decking extension plate central axis and a first decking extension plate bottom surface, where the first decking extension plate central axis is coaxial with the first decking central axis, and which has a first decking extension plate width equal to a first decking body width of the first decking body, where the first decking extension plate extends beyond the first decking body third edge, and which has a first decking extension plate capture member affixed to the first decking extension plate on the first decking extension central axis at the first decking extension plate bottom surface, and where a receiver is found at the first decking body top surface on the first decking central axis, which receiver is sized to receive the first decking extension plate capture member and is aligned to the first decking body central axis.
In yet another embodiment, the present disclosure includes a method of constructing a scaffolding system, which includes attaching the longitudinal support members to one of a plurality of lateral support members, positioning an end decking atop the longitudinal support members, coupling the end decking to the longitudinal support member by the end decking first capture member and coupling the end decking to the second longitudinal support member by the end decking second capture member; positioning a first decking atop the longitudinal support members and positioning a first decking extension plate capture member in the end decking receiver; and coupling the first decking to the longitudinal support member by the first decking first capture member and coupling the first decking to the second longitudinal support member by the first decking second capture member.
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The first decking first capture member 106 and the first decking second capture member 108 may be comprised of an opening in the first decking body 104 to which truss retention clips may be affixed, or may be brackets which affix, such as by bolting, over an adjustable range of locations to accommodate any deflection. The first decking 102 has a first decking central axis 110 perpendicular to a first decking body lateral axis 112, a first decking body first edge 114, a first decking body second edge 116, a first decking body third edge 118, a first decking body fourth edge 210, a first decking body top surface 202, and a first decking body bottom surface 120. The first decking body 104 is generally rectangular and fashioned of durable material. Preferably the first decking body 104 is a box of welded metal of a thickness sufficient to support workers, such as 0.125 inch (3.175 mm) ASTM A36 steel. The first decking body 104 may include a first decking body reinforcement 132, extending from the first decking body third edge 118 to the first decking body fourth edge 210, to support the first decking body top surface 202 and provide reinforcement for the receiver 204.
The first decking 102 has a receiver 204 in the first decking body top surface 202 on the first decking central axis 110 sized to receive the first decking extension plate capture member 130 which is downwardly dependent and preferably does not extend above the first decking top surface 202. The receiver 204, which may be circular to permit varied alignment upon installation, is aligned to the first decking body central axis 110. The receiver 204 is positioned and sized to align with and retain the first decking extension plate capture member 130 from a second, adjacent first decking 102, while permitting the two first decking bodies to be unaligned on a first decking central axis 110, permitting the succession of first deckings 102 to provide a non-linear profile.
The first decking first capture member 106 is affixed to the first decking body 104 intermediate the first decking body first edge 114 and the first decking body central axis 110 at the first decking body bottom surface 120 at the first decking body lateral axis 112 while the second decking second capture member 108 is affixed to the first decking body 104 intermediate the first decking body second edge 116 and the first decking body central axis 110 at the first decking body bottom surface 120 at the first decking body lateral axis 112. The second decking second capture member 108 is distant the first decking first capture member 106 by a capture member distance 122. The first decking extension plate 124 extends beyond the first decking body third edge 118 and is affixed to the first decking body 104 at the first decking body top surface 202 and has a first decking extension plate central axis 126 and a first decking extension plate bottom surface 128. The first decking extension plate central axis 126 coaxial with the first decking central axis 110. Preferably, the first decking extension plate 124 has a first decking extension plate first edge 206 aligned with the first decking member first edge 114 and a first decking extension plate second edge 208 aligned with the second decking second edge 116, such that the first decking 102 is generally rectangular and such that the first decking extension plate 124 has a first decking extension plate width 142 equal to a first decking body width 140 of the first decking body 104. However, the first decking extension plate 124 may present other profiles, such as a trapezoid or rounded rectangular.
The first decking extension plate capture member 130 is affixed at the first decking extension plate bottom surface 128 to the first decking extension plate 124 on the first decking extension central axis 126.
A first decking first attachment member 190 and a first decking second attachment member 192 may be affixed to each first decking 102 at the first decking body bottom surface 120 and adjacent the first decking body first edge 114 and the first decking body second edge 116, respectively, and descend downwardly from the first decking body 104. Each of the first decking first attachment member 190 and the first decking second attachment member 192 may be constructed of 2 inch (50.8 mm) schedule 40 pipe, of A53 steel, with a capture member length 194 of 6 inches (152.4 mm).
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The end decking 402 has an end decking receiver 428 in the end decking body top surface 502 on the end decking body central axis 410 sized to receive the first decking extension plate capture member 130. The end decking receiver 428, which may be circular, square or any shape to retain, is aligned to the end decking body central axis 410. The end decking receiver 428 is positioned and sized to align with and retain the first decking extension plate capture member 130 from an adjacent first decking 102, while permitting the first decking 102 to be unaligned on the first decking central axis 110 with the end decking 402, permitting the succession of first deckings 102 terminating in the end decking 402 to provide a non-linear profile.
The end decking first capture member 406 is affixed to the end decking body 404 intermediate the end decking body first edge 414 and the end decking body central axis 410 at the end decking body bottom surface 420 at the end decking body lateral axis 412 while the end decking second capture member 408 is affixed to the end decking body 404 intermediate the end decking body second edge 416 and the end decking body central axis 410 at the end decking body bottom surface 420 at the end decking body lateral axis 412. The end decking second capture member 408 is distant the end decking first capture member 406 by the capture member distance 122. An end decking first attachment member 490 and an end decking second attachment member 492 may be affixed to end decking body 402. Each of the end decking first attachment member 490 and the end decking second attachment member 492 may be constructed of 2 inch (50.8 mm) schedule 40 pipe, of A53 steel, with a capture member length 194 of 6 inches (152.4 mm).
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Each double truss 902 may further include a friction clamp 950 or other mechanism to fix the telescoping member 910, 912 in relation to the balance of the double trusses 902 to prevent further telescoping after installation, such as by constricting the outer body of the double truss 902 about the telescoping member 910, 912. Other systems, such as pins, may also be used. When engaged, the friction clamp 950 prevents a change in the position of any lateral support member attached to the double truss 902 and any change in position of any first decking 102.
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As the wall-mounted drop-in connector is directional, the system 1350 may be lifted an an integral unit at the two connecting points 1112. Beneficially, when trusses 902, 1002 are locked to at each end to a lateral support member 1102, and each of lateral support member 1102 are constructed to hang from and contact a wall-mounted drop-in connector 1202 as a temporary, directional attachment or hanger, such as by a lateral support hanger 1124, then the system 1350, including the first deckings 102, any intermediate deckings 602 and the end deckings 402 positioned between a first lateral support member 1102 and a second lateral support member 1102 (which may include one or more lateral support members 1102 intermediate), may be lifted as a unit by connection of lifting cables to the connecting points 1112 to a higher elevation where a further set of connecting points 1112 may be positioned. When engaged, the friction clamp 950 prevents a change in the position of any lateral support member attached to the truss 902 during relocation of the system 1350 and any change in position of any first decking 102. The system 1350 thus may serve as the main methodology for erection of walled constructions having curvilinear surfaces, particular storage tanks, may be attached to steel surfaces and may be integrated into formwork systems to provide work platforms on curved surfaces.
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In step 1402, a plurality of wall-mounted drop-in connectors 1202 are affixed to a wall.
In step 1404, each of a plurality of lateral support members 1102, each having a horizontal support 1154 and two locking surfaces 1104, is each lowered to engage, and be maintained in position, by one of the wall-mounted drop-in connectors 1202 at a lateral support hanger 1124. The lateral support member 1102 also includes a connecting point 1112 at each of the first end 1114 and the second end 1116 positioned above the top surface of the first decking 102 when installed.
In step 1406, a longitudinal support member 1002 is attached at each end 906, 908 to one of the plurality of lateral support members 1102. The longitudinal support member 1002 may have telescoping members 910, 912 at one or both of its first end 906 and second end 908 and a locking mechanism to engage the locking surfaces 1104 of the lateral support member 1102.
In step 1408, a second longitudinal support member 1002 is attached at each end 906, 908 to one of the plurality of lateral support members 1102. The second longitudinal support member 1002 may have telescoping members 910, 912 at one or both of its first and second ends 906, 908 and a locking mechanism to engage the locking surfaces 1104 of the lateral support member 1102.
In step 1410, an end decking 402, is positioned atop the longitudinal support member 1002 and the second longitudinal support member 1002. The end decking 402 has an end decking first capture member 406 and an end decking second capture member 408. The end decking 402 has an end decking receiver 428 sized to receive a first decking extension plate capture member 130.
In step 1412, the end decking 402 is coupled to the longitudinal support member 1002 by the end decking first capture member 406 and to the second longitudinal support member 1002 by the end decking second capture member 408.
In step 1414, a first decking 102, is positioned atop the longitudinal support member 1002 and the second longitudinal support member 1002 such that the first decking extension plate capture member 130 is retained by the end decking receiver 428. The first decking body 104 has a first decking first capture member 106 and a first decking second capture member 108, and a receiver 204.
In step 1416, the first decking 102 is coupled to the longitudinal support member 1002 by the first decking first capture member 106 and to the second longitudinal support member 1002 by the first decking second capture member 108.
In step 1418, each of a plurality of support lines is attached to each of the connecting points 1112 of the each of a plurality of lateral support members 1102.
In step 1420, a second plurality of wall-mounted drop-in connectors 1202 are affixed to the wall. The second plurality of wall-mounted drop-in connectors 1202 may be laterally adjacent the plurality of wall-mounted drop-in connectors 1202 or may be above or below the plurality of wall-mounted drop-in connectors 1202.
In step 1422, each of the plurality of lateral support members 1102 is lifted vertically by the plurality of support lines attached at each of the connecting points 1112 of the each of a plurality of lateral support members 1102 to disengage from the wall-mounted drop-in connectors 1202.
In step 1424, each of the plurality of lateral support members 1102 are relocated to a position above the second plurality of wall-mounted drop-in connectors 1202.
In step 1426, each of the plurality of lateral support members 1102 is lowered vertically by the plurality of support lines attached at each of the connecting points 1112 of the each of a plurality of lateral support members 1102 to engage from the second wall-mounted drop-in connectors 1202.
While the present disclosure has been described in connection with presently preferred embodiments, it will be understood by those skilled in the art that it is not intended to limit the disclosure to those embodiments. It is therefore, contemplated that various alternative embodiments and modifications may be made to the disclosed embodiments without departing from the spirit and scope of the disclosure defined by the appended claims and equivalents thereof.
The priority of U.S. Provisional Patent Application No. 62/450,375 for “Integrated Modular Scaffolding System,” filed Jan. 25, 2017, is hereby claimed and the specification thereof is incorporated herein by reference.
Filing Document | Filing Date | Country | Kind |
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PCT/US18/15022 | 1/24/2018 | WO | 00 |
Number | Date | Country | |
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62450375 | Jan 2017 | US |