Scaffolding structures for high-altitude work

Abstract

To provide a scaffolding structure for high-altitude work that speeds up disassembly and assembly work, and that provides a space surrounded by cross bars and supports with two areas: an area where scaffolding boards are arranged in a stepped manner and an area where scaffolding boards are not arranged, so that the center of gravity of a worker is always located in the space surrounded by cross bars and supports while going up and down, and the scaffolding does not tilt or deform. [Solution] The base 1 and crosspiece 6 are formed into the same side frame shape in a plan view. Connecting pipes 4, 81, 82 are provided on the upper surface of the corner of the base 1 and on both the upper and lower surfaces of the corner of the crosspiece 6, respectively, and tubular vertical members 51, 52, 53, 54 are inserted and connected to the crosspiece 6 to form a support extending in the height direction. The treads of the scaffolding planks 10 and the treads of the suspended scaffolding planks 12 are arranged in a stepped manner on the crosspiece 6, and areas where the scaffolding planks 10 and 12 are arranged and areas where no scaffolding planks are arranged are arranged along the height direction.

Description

[Technical Field]

[0001] The present invention relates to a scaffolding structure used for work at height, and in particular to a tower-like scaffolding structure for high-altitude work that can be used to safely send workers into narrow, high places such as the attic space under a suspended ceiling to carry out repair and inspection work, and that can be easily disassembled, transported, and assembled. [Background technology]

[0002] A suspended ceiling is a structure in which a lattice-like base framework is suspended from the ceiling space of a structure using metal suspension bolts or the like, and ceiling boards such as gypsum are attached to the surface of the base framework. Since suspended ceilings are installed with the ceiling boards separated from the structural frame, this attic space can be effectively used as installation space for lighting fixtures, air conditioning, plumbing equipment, etc., and has the advantage of a neat appearance. Many ceilings in large facilities such as gymnasiums and halls use a suspended structure.

[0003] Suspended ceilings, whose ceiling boards are suspended from the structural frame, sway sideways like a swing during earthquakes. This can cause components to deform due to irregular forces and impacts, damaging the hanging hardware, disconnecting clips and other connections, and causing the hanging structure to break, resulting in the falling of the connecting hardware and ceiling boards. Suspended ceiling damage and falling accidents can be extremely dangerous, as falling objects can strike people indoors. After carefully examining actual earthquake damage, the government established new earthquake resistance standards in 2014, including the installation of reinforcing braces for suspended ceilings, to prevent ceiling damage even in earthquakes of a specified intensity, and recommended the installation of nets below the ceiling boards to catch falling objects. While it is essential that newly constructed suspended ceilings meet the new standards, the government also recommends earthquake-proofing work for suspended ceilings constructed before 2014 to meet the new standards.

[0004] To perform earthquake-resistant construction work, workers must be able to enter the attic space through the removed ceiling panels and stand at a height that allows them to reach the ceiling panels. To do this, scaffolding must be installed on the floor directly below the planned ceiling board removal or work location. Workers must then ascend vertically from the installed location and enter the attic space through the open area in the suspended ceiling. In other words, scaffolding used for suspended ceiling repair work must be designed to allow workers to move directly upward from the installed location. This is because workers must enter through a limited, narrow opening. Furthermore, suspended ceiling repair work takes approximately 10 minutes per location, and once completed, workers must move to the next location to perform the repair. Therefore, suspended ceiling scaffolding requires quick, easy disassembly and assembly, and is lightweight.

[0005] A proposed scaffolding for use in suspended ceiling repair work consists of a lower frame equipped with four pipe supports and horizontal rods erected between the ends of adjacent pipe supports and a hydraulic jack support base, and an upper frame equipped with horizontal rods erected between the ends of the four pipe supports and adjacent pipe supports and a scaffolding board, with leg rods slidably inserted into the inside of the pipe supports of the lower frame and the inside of the pipe supports of the upper frame, the scaffolding board attached to the upper frame is raised and lowered by the upper end of the piston of a hydraulic jack attached to the hydraulic jack support base of the lower frame, and a ladder attached to the outside of a work platform in which the lower and upper frames are integrated vertically with the leg rods, and a worker climbs the ladder to the scaffolding board that stops at the desired position, straddles the horizontal rods of the upper frame and descends onto the scaffolding board (see, for example, Patent Document 1).

[0006] The invention disclosed in Patent Document 1 has the following drawbacks: first, the amount of insertion of the leg rod into the pipe support of the upper frame changes in response to the extension and retraction of the piston of the hydraulic jack, thereby adjusting the height of the scaffolding board, so it requires a heavy hydraulic jack device and is time-consuming to disassemble, move, and assemble; second, since the end of the leg rod is inserted into the pipe support of the upper and lower frames, the leg rod is thinner than the other pipe support, and the strength of the connecting part between the lower frame and the upper frame is weak; and third, the worker must be installed separately outside the framework. Because the ladder is designed to be climbed up and down, there is a risk that the center of gravity will shift towards the worker as he climbs up or down the ladder, causing the work platform to tip over and onto the worker.Fourthly, the open area of ​​the suspended ceiling into which the worker is guided needs to be the flat area of ​​the upper frame plus the thickness of the worker's body, and the rectangular area made up of the horizontal bars is small compared to the height, resulting in a long, narrow work platform that is unstable.Due to these drawbacks, there is a problem that the system is not suitable for suspended ceiling repair work.

[0007] A workbench has been proposed in which pulleys are attached to the diagonal positions of the upper and lower crossbars of multiple frame bodies, a single wire rope is hung around the multiple pulleys in sequence, and by extending the wire rope, all of the frame bodies are stacked in a row vertically to form a workbench, and by winding up the wire rope, the frame bodies are stacked on top of each other to make them compact and portable (see, for example, Patent Document 2).

[0008] The workbench disclosed in Patent Document 2 has two pulleys for each frame, making it impossible to separate the individual frames or to disassemble a single frame into individual parts. Therefore, when moving the workbench, all of the frames, wire ropes, and other components that make up the workbench must be transported at the same time. Even if the wire rope is wound up to make the workbench compact, the large volume and weight make it difficult to transport manually and require a vehicle, making it difficult to transport easily. Furthermore, the height of the workbench, which is set according to the length of the wire rope, is fixed and cannot be adjusted, making it unsuitable for suspended ceiling repair work.

[0009] It has been proposed that horizontal braces and diagonal braces be erected between a pair of support members each consisting of a basic member and a cross beam erected between them, and that the basic member be inserted and connected to a number of tubular vertical members of different diameters so as to be able to expand and contract in one direction, and that the pair of basic members be formed into a single support member by erecting a cross beam between each of the upper ends of the tubular vertical members, and that diagonal braces be erected between the pair of support members arranged opposite each other on the floor, and that an opening and closing hatch-type work board be erected between the opposing cross beams located at the top (see, for example, Patent Document 3).

[0010] The scaffolding for high-altitude work disclosed in Patent Document 3 has connected tubular vertical members whose diameters gradually decrease from bottom to top, with the upper members tapering in comparison to the lower ones. As the members move upward, their support strength as supports weakens, posing problems with load-bearing capacity and the risk of the tubular vertical members contracting during work. Dismantling work involves first removing the braces, contracting the tubular vertical members, and then transporting the contracted support members with overlapping cross bars all at once, which makes them heavy and physically demanding for workers. This creates a problem: the scaffolding is unsuitable for suspended ceiling repair work, which requires sequential work, each taking approximately 10 minutes.

[0011] As described in paragraph "0047" of the specification of Patent Document 3 and shown in "Figure 5" of the drawings, a worker climbs the inside of the horizontal bars of one of the support members like a ladder, opens the hatch from below when he reaches the top plate, steps out through the opening, sits on the top plate, closes the hatch, and begins work standing on the work platform. For this reason, the work platform must be larger than the torso width of an adult male. Furthermore, since the periphery of the lid presses against the periphery of the opening and supports the weight of an adult male, it is essential that the work platform be made of highly rigid materials from a safety perspective.

[0012] Furthermore, since only one of the support members is used as a ladder, there is a problem in that the scaffolding tilts toward one of the support members and becomes distorted while climbing up and down the rungs of the support members.

[0013] The invention disclosed in Patent Document 4 has side frames made up of a pair of pipe members assembled in parallel, scaffolding boards arranged between the side frames, and a support member having a pressing and compressing member attached to one of the pipe members that make up the side frames. The invention disclosed in Patent Document 4 is scaffolding for exterior wall repair work, not for ceilings, and differs in both configuration and function from the present invention. [Prior art documents] [Patent documents]

[0014] [Patent Document 1] Japanese Utility Model Application Publication No. 6-56317 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-261286 [Patent Document 3] Patent publication of Patent No. 5895255 [Patent Document 4] Publication number 7-52876 Summary of the Invention [Problem to be solved by the invention]

[0015] The problem to be solved by the present invention is that the smallest unit of components that can be disassembled is heavy, and The problems are that transportation and assembly work take time, the physical burden on the worker is great, and when climbing up and down, the worker's weight is only on one side, which increases the risk of tilting, deformation, or collapse. [Means for solving the problem]

[0016] The invention according to claim 1 is characterized in that a plurality of tubular vertical members of the same length are connected along the axial direction of the pipes, and the supports are arranged in parallel at predetermined intervals, A scaffolding structure for high-altitude work, in which side frame-like horizontal bars are interposed at connection positions of tubular vertical members between adjacent supports and spaced apart at regular intervals in the height direction, and are detachably connected to the tubular vertical members, The horizontal beams are arranged in a parallel relationship, with a long tube at one end of a tubular horizontal member and a short tube at the other end, facing in the same direction and in a parallel positional relationship, and a pair of horizontal beam members are provided on both the upper and lower outer surfaces of the connected portion with connecting members that can be fitted onto the ends of the tubular vertical members, and the tubular horizontal members are arranged in parallel, and a connecting tubular horizontal member is arranged in parallel, with the long tube and the short tube of another horizontal beam member that is paired with the long tube being connected in the same straight line, and the horizontal beams are assembled into a side frame shape that is approximately square in plan view, In one side area of ​​the inner space surrounded by the horizontal beams and the supports, a scaffolding board is installed between the opposing tubular horizontal members of the horizontal beams, and a suspended scaffolding board is suspended so that the tread surface is located in a stepped manner below the tread surface of the scaffolding board, A feature of the present invention is that no scaffolding boards are provided in the other side area of ​​the inner space surrounded by the cross beams and supports. The invention according to claim 2 is characterized in that a plurality of tubular vertical members of the same length are connected along the axial direction of the pipe, and the supports are arranged in parallel at predetermined intervals, A scaffolding structure for high-altitude work, in which side frame-like horizontal bars are interposed at connection positions of tubular vertical members between adjacent supports and spaced apart at regular intervals in the height direction, and are detachably connected to the tubular vertical members, The horizontal beam is formed by connecting four tubular horizontal members on the same plane in a side frame shape that is approximately square in plan view, and connecting members that can be fitted onto the ends of the tubular vertical members are provided on both the upper and lower outer surfaces of the connecting portions, In one side area of ​​the inner space surrounded by the horizontal beams and the supports, a scaffolding board is installed between the opposing tubular horizontal members of the horizontal beams, and a suspended scaffolding board is suspended so that the tread surface is located in a stepped manner below the tread surface of the scaffolding board, A feature of the present invention is that no scaffolding boards are provided in the other side area of ​​the inner space surrounded by the cross beams and supports. [Effects of the Invention]

[0017] Since multiple tubular vertical members are inserted and connected via horizontal bars and assembled in the axial direction (height direction) of the tubular vertical members to form a support pillar, the support pillar can be easily and quickly disassembled into individual tubular vertical members and horizontal bars, which has the effect of improving workability.

[0018] The inside area surrounded by the posts and crossbars is divided vertically into two areas: an area where the treads of scaffolding boards are arranged, and an area without scaffolding boards and no obstacles. Workers ascend and descend the inside area surrounded by the posts and crossbars using scaffolding boards arranged in a stepped pattern, so the center of gravity is located inside the area surrounded by the posts and crossbars, and the scaffolding does not tilt or deform due to the worker's weight. In addition, since the lower half of the worker's body moves in the area where the treads of scaffolding boards are arranged in a stepped pattern, and the upper half of the worker's body moves in the area without scaffolding boards and no obstacles, the worker can ascend and descend smoothly inside the scaffolding. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view showing the configuration of a scaffolding structure for high-altitude work (Example 1). [Figure 2] 1 is an explanatory plan view showing the configuration of the base (Example 1). [Figure 3] 1 is a front view illustrating a state in which a support pipe is attached to a base (Example 1). [Figure 4] 1 is an explanatory exploded plan view showing the configuration of a horizontal beam (Example 1). [Figure 5] 1 is an explanatory plan view showing an assembled state of the horizontal rail member (Example 1). [Figure 6] 1 is a front view illustrating a state in which the horizontal beam and the pipe are assembled together (Embodiment 1). [Figure 7] FIG. 1 is an explanatory diagram showing a state in which a worker is ascending to a scaffolding structure for high-altitude work (Example 1). [Figure 8] Fig. 1 is a perspective view showing the configuration of a scaffolding structure for high-altitude work (Example 2). [Figure 9] 10 is a perspective explanatory view showing a state in which the horizontal beam and the pipe are assembled (Embodiment 2). DETAILED DESCRIPTION OF THE INVENTION

[0020] By connecting the horizontal bars to the tubular vertical members by inserting them, disassembly and assembly work can be done more quickly, and by dividing the space surrounded by the horizontal bars and supports into two areas, one where scaffolding boards are arranged in a stepped manner and one where scaffolding boards are not arranged, the scaffolding does not tilt or deform due to the weight of the worker and maintains its shape stably, allowing workers to climb up and down the scaffolding safely even in narrow spaces. [Example]

[0021] Example 1 will be described with reference to Figures 1 to 7. As shown in Figure 2, the base 1 is formed in the shape of a square side frame in plan view, with four tubular members 2 integrally connected so that they are positioned on the same plane with an interior angle of 90 degrees. Reinforcing members 3 are attached to the connecting corners of the tubular members 2, respectively. The reinforcing members 3 have flat upper and lower surfaces, and firmly secure the ends of adjacent tubular members 2 to each other. As shown in Figure 3, a connecting pipe 4 with its tip extending upward is integrally attached to the upper surface of the reinforcing member 3. The connecting pipe 4 is erected on the upper surface of the reinforcing member 3 so that the axial line of the connecting pipe 4 and the axial line of the tubular member 2 form an angle of 90 degrees with each other. The connecting pipe 4 is inserted into the inner space of the tubular vertical member 51 from the lower end opening of the tubular vertical member 51, and the four tubular vertical members 51 are attached to the upper surface of each corner of the base 1 so that they are parallel to each other and perpendicular to the tubular horizontal member 2.

[0022] As shown in Figures 4 to 6, the horizontal crossbar 6 is formed by assembling a pair of horizontal crossbar members 61, 61 and has a square side frame shape in a plan view. Specifically, the horizontal crossbar member 61 has a long tube 61b connected to one end of a horizontal crossbar basic member 61a at an interior angle of 90 degrees, and a short tube 61c connected to the other end of the horizontal crossbar basic member 61a at an interior angle of 90 degrees. Reinforcement members 7 are attached to these connected corners. Connecting tubes 81, 82 are integrally attached to the upper and lower outer surfaces of the reinforcing member 7, with their axial centers at an angle of 90 degrees to the axial center line of the horizontal crossbar basic member 61a. The long tube 61b and the short tube 61c are parallel to each other, sandwiching the horizontal crossbar basic member 61a therebetween. The horizontal crossbar basic member 61a has a length equal to the sum of the lengths of the long tube 61b and the short tube 61c. The short pipe 61c is set to be significantly shorter than the long pipe 61b. The long pipe 61b of one horizontal beam member 61 and the short pipe 61c of the other horizontal beam member 61 that is paired with each other are connected in the same straight line by abutting their tip ends and fixedly fastening them together with fastening fittings 9 such as clamps.

[0023] As shown in Fig. 6, the lower connecting pipes 82 are inserted into the inside of the tubular vertical members 51 through the upper end openings of the tubular vertical members 51, and the first-stage horizontal cross member 6a is assembled to the tubular vertical members 51. The upper connecting pipes 81 of the first-stage horizontal cross member 6a are inserted into the inside of the tubular vertical members 52 through the lower end openings of the tubular vertical members 52, and the tubular vertical members 52 are assembled to the first-stage horizontal cross member 6a. The lower connecting pipes 82 of the second-stage horizontal cross member 6b are inserted into the inside of the tubular vertical members 52 through the upper end openings of the tubular vertical members 52, and the second-stage horizontal cross member 6b is assembled to the tubular vertical members 52. The upper connecting pipes 81 of the second-stage horizontal cross member 6b are inserted into the inside of the tubular vertical members 53 through the lower end openings of the tubular vertical members 53, and the tubular vertical members 53 are assembled to the second-stage horizontal cross member 6b. The connecting pipe 82 below the third-stage horizontal crosspiece 6c is inserted into the inside of the tubular vertical member 53 from the upper end opening of the tubular vertical member 53, and the third-stage horizontal crosspiece 6c is assembled to the tubular vertical member 53. The connecting pipe 81 above the third-stage horizontal crosspiece 6c is inserted into the inside of the tubular vertical member 54 from the lower end opening of the tubular vertical member 54, and the tubular vertical member 54 is attached to the third-stage horizontal crosspiece 6c. The connecting pipe 82 below the fourth-stage horizontal crosspiece 6d is inserted into the inside of the tubular vertical member 54 from the upper end opening of the tubular vertical member 54, and the fourth-stage horizontal crosspiece 6d is attached to the tubular vertical member 54. The tubular vertical members 51, 52, 53, and 54 act as vertically erected supports with the horizontal crosspieces 6a, 6b, and 6c interposed therebetween.

[0024] The fourth horizontal crosspiece 6d, located at the top, is used as a safety fence frame to prevent workers from falling. A scaffolding plank 10 is installed between the opposing horizontal crosspiece basic members 61a, 61a of each of the first, second, and third horizontal crosspieces 6a, 6b, 6c. Both ends of the scaffolding plank 10 are stably attached to the opposing horizontal crosspiece basic members 61a, 61a with fasteners 11, respectively. The hanging fittings of the hanging scaffolding plank 12 are hooked near the installation position of the scaffolding plank 10 on the inside of the horizontal crosspieces 6a, 6b, 6c so that the treads of the scaffolding plank 10 and the treads of the hanging scaffolding plank 12 are arranged in a stepped pattern. The long side of the scaffolding plank 10 is placed close to and along one side of the side frame-like cross bars 6a, 6b, and 6c, which is formed by connecting the long tube 61b of one cross bar member 61 and the short tube 61c of the other paired cross bar member 61 in the same straight line. In the inner space of the cross bars 6a, 6b, and 6c, the area extending from the hanging portion of the suspended scaffolding plank 12 to one side of the side frame where the short tube 61b of the cross bar member 61 and the long tube 61b of the other paired cross bar member 61 are connected is an area where neither the scaffolding plank 10 nor the scaffolding plank of the suspended scaffolding plank 12 is arranged, forming an obstacle-free passageway where the worker 13 can smoothly ascend and descend.

[0025] The reinforcing rods 14 are respectively installed between adjacent tubular vertical members 51, 51 on the side of the area where no scaffolding boards are arranged, between tubular vertical members 52, 52, and between tubular vertical members 53, 53. The reinforcing rods 14 are installed by being fixed to the tubular vertical members 51, 52, 53 with fasteners 15 so that they are parallel to one another. In Example 1, the cross beams 6b are supported by reinforcing tension rods 16, but it is not necessary to provide the reinforcing tension rods 16.

[0026] As a specific example, horizontal beam basic member 61a and tubular member 2 are made of pipes of the same length, approximately 60 cm, and tubular vertical members 51, 52, 53, and 54 are made of pipes of the same length, approximately 100 cm. If the vertical width of each tread of scaffolding plank 10 and suspended scaffolding plank 12 is approximately 10 cm, it is possible to create an access passageway with a vertical width of approximately 40 cm and a horizontal width of approximately 60 cm that does not have any scaffolding planks arranged in the height direction of the cross section, ensuring a passage large enough for the body of an adult male worker 13 to pass through.

[0027] Next, the operation and effects of the scaffolding system will be described. As shown in Figure 7, a worker 13 enters the inside of the side frame-like crosspiece 6 between the tubular vertical members 51, 51 and between the base 1 and the crosspiece 6a. The worker 13 repeats the process of placing one foot on the reinforcing rod 14 and the other foot on the tread of the suspended scaffolding plank 12, and then moving one foot from the reinforcing rod 14 to the tread of the scaffolding plank 10, until the worker performs work with one foot on the tread of the scaffolding plank 10 erected on the crosspiece basic members 61a, 61a of the crosspiece 6c and the other foot on the tread of the suspended scaffolding plank 12 suspended from the crosspiece basic members 61a, 61a of the crosspiece 6c. Furthermore, the worker 13 can also bring another scaffolding board 10 and climb up, standing on the scaffolding board 10 of the horizontal crosspiece 6c. Then, the worker 13 can erect the scaffolding board 10 between the horizontal crosspiece basic members 61a, 61a, and work while standing on the two side-by-side scaffolding boards 10. The worker 13 climbs and descends while passing through the inside of the horizontal crosspiece 6, so his center of gravity is located inside the side-frame-like horizontal crosspiece 6, and the scaffolding does not tilt or deform. When moving to a different work location, the scaffolding is disassembled into the base 2, the tubular vertical members 51, 52, 53, 54, the horizontal crosspiece member 61, the scaffolding board 10, and the suspended scaffolding board 12. The disassembled parts, the tubular vertical members 51, 52, 53, 54, and the pair of horizontal crosspiece members 61, are identical in shape, which eliminates the need to select each part during assembly, thereby improving the efficiency of the assembly work. Furthermore, because each part is made primarily of pipes, it is lightweight, meaning that transportation and assembly work is less physically demanding for workers. [Example]

[0028] A second embodiment will be described with reference to Figures 8 and 9. To simplify the description, parts that perform the same functions as those in Figures 1 to 7 will be denoted by the same reference numerals. The difference from Example 1 shown in FIGS. 1 to 7 is that the horizontal beams 17 are pre-formed into a square side frame shape in plan view. The horizontal beams 17 are formed by connecting the ends of four tubular horizontal members 17a at an internal angle of 90 degrees, forming a square side frame shape in plan view on the same plane. Reinforcing members 18 are fixedly attached to the connecting corners of adjacent tubular horizontal members 17a. Connecting pipes 19 and 20 are attached to the underside and upper and lower sides of the reinforcing members 18 at an angle of 90 degrees relative to the axial center line of the tubular horizontal members 17a. The connecting pipes 19 and 20 are inserted into the inside of the tubular vertical member 51 and the tubular vertical member 52, respectively, for connection. In this way, the horizontal beams 17 are inserted between the tubular vertical members 51, 52, 53, and 54, connecting the tubular vertical members 51, 52, 53, and 54 in the height direction. The topmost horizontal crosspiece 17 is used as a safety fence frame to prevent workers from falling. 10 is a scaffolding board, and 12 is a hanging scaffolding board.

[0029] When disassembled, it can be disassembled into the base 2, tubular vertical members 51, 52, 53, 54 of the same length, horizontal crosspieces 17 of the same shape, scaffolding board 10, and suspended scaffolding board 12. Each part is lightweight and easy to transport, and there is no risk of mixing up parts during assembly. [Explanation of symbols]

[0030] 51, 52, 53, 54 Tubular longitudinal members 6, 6a, 6b, 6c, 6d, 17 crosspieces 61 Crosspiece 61a Basic crosspiece 61b long tube 61c short tube 10 Scaffolding Planks 12 Suspended scaffolding board 13 Workers

Claims

1. Support columns each formed by connecting a plurality of tubular vertical members of the same length along the axial direction of the tube are arranged in parallel at predetermined intervals, A scaffolding structure for high-altitude work, in which side frame-like horizontal bars are interposed at connection positions of tubular vertical members between adjacent supports and spaced apart at regular intervals in the height direction, and are detachably connected to the tubular vertical members, The horizontal beams are arranged in a parallel relationship, with a long tube at one end of a tubular horizontal member and a short tube at the other end, facing in the same direction and in a parallel positional relationship, and a pair of horizontal beam members are provided on both the upper and lower outer surfaces of the connected portion with connecting members that can be fitted onto the ends of the tubular vertical members, and the tubular horizontal members are arranged in parallel, and a connecting tubular horizontal member is arranged in parallel, with the long tube and the short tube of another horizontal beam member that is paired with the long tube being connected in the same straight line, and the horizontal beams are assembled into a side frame shape that is approximately square in plan view, In one side area of ​​the inner space surrounded by the horizontal beams and the supports, a scaffolding board is installed between the opposing tubular horizontal members of the horizontal beams, and a suspended scaffolding board is suspended so that the tread surface is located in a stepped manner below the tread surface of the scaffolding board, A scaffolding structure for high-altitude work, characterized in that no scaffolding boards are arranged in the other side area of ​​the inner space surrounded by the cross beams and supports.

2. Support columns each formed by connecting a plurality of tubular vertical members of the same length along the axial direction of the tube are arranged in parallel at predetermined intervals, A scaffolding structure for high-altitude work, in which side frame-like horizontal bars are interposed at connection positions of tubular vertical members between adjacent supports and spaced apart at regular intervals in the height direction, and are detachably connected to the tubular vertical members, The horizontal beam is formed by connecting four tubular horizontal members on the same plane in a side frame shape that is approximately square in plan view, and connecting members that can be fitted onto the ends of the tubular vertical members are provided on both the upper and lower outer surfaces of the connecting portions, In one side area of ​​the inner space surrounded by the horizontal beams and the supports, a scaffolding board is installed between the opposing tubular horizontal members of the horizontal beams, and a suspended scaffolding board is suspended so that the tread surface is located in a stepped manner below the tread surface of the scaffolding board, A scaffolding structure for high-altitude work, characterized in that no scaffolding boards are arranged in the other side area of ​​the inner space surrounded by the cross beams and supports.

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