GB2530127A

GB2530127A - Suspended scaffolding and installation method using the same

Info

Publication number: GB2530127A
Application number: GB1507523.7A
Authority: GB
Inventors: Koji Sato; Jou Yokokawa; Akitsugu Ueda; Minoru Kurokawa
Original assignee: Hitachi Plant Construction Co Ltd
Current assignee: Hitachi Plant Construction Co Ltd
Priority date: 2014-06-16
Filing date: 2015-05-01
Publication date: 2016-03-16
Also published as: JP6409353B2; GB201507523D0; JP2016003472A; LT2015042A; LT6253B

Abstract

A suspended scaffolding 10 includes a frame 20 obtained by temporarily assembling columns 22 and supports 40, wherein the frame 20 is carried in from a ceiling side of a small room in which a floor surface and wall surfaces have been formed. The columns 22 are disposed at positions approximately overlapping with ceiling beams in a plan view of the small room and are partially removed after construction of a ceiling. The supports 40 are connected to the columns, wherein each support 40 is adjustably attached to a ceiling beam, adjustable in a horizontal direction relative to the ceiling beam. An installation operation scaffolding 30 is attached to the frame 20 at a height position which allows equipment to be carried in at the floor surface side of the small room. An installation method using suspended scaffolding comprising a ceiling construction scaffold, a wall finishing scaffold and an equipment installation scaffold is also disclosed. The suspended scaffolding eliminates the need to repeatedly remove and erect installation scaffolding.

Description

DESCRIPTION

SUSPENDED SCAFFOLDING AND INSTALLATION METHOD USING

THE SAME

TECHNICAL FIELD

[0001] The present invention relates to a suspended scaffolding, which serves as scaffolding when installing facilities/equipment in a small room enclosed by concrete, as well as an installation method using the same.

BACKGROUND ART

[0002] In a building such as a nuclear power plant, equipment, piping, ducts, and cable trays are installed in small rooms enclosed by concrete walls.

Conventionally, a post-insertion method has been implemented as a method for construction of such a building. In a post-insertion method, first, the floor and walls are formed, and subsequently ceiling construction scaffolding is erected. After constructing the ceiling using the ceiling construction scaffolding, the operations of installing a hoist or the like that is mounted to the ceiling and finishing the wall surfaces are carried out. The ceiling construction scaffolding is then removed and the floor is painted. Next, facilitiesJ equipment, piping, support members, and the like to be installed within the small room are carried in from a passageway opening in a wall. Finally, the facilities/equipment, piping, ducts, etc. are installed while repeatedly erecting and removing installation operation scaffolding.

[0003] In such a post-insertion method, the construction period increases and there is a large amount of work in high places due to reassembly of the installation operation scaffolding. Thus, a pre-insertion method using a module structure in which some of the facilities/equipment are temporarily assembled in advance has been implemented.

In the module structure disclosed in JP2012-207430A, by providing a hanging means that is capable of hanging a facility/equipment component to be disposed in a small room, wherein the length of the hanging means is adjusted according to a disposal position in accordance with the design within the small room, the facility/equipment component can be floated up from the floor surface of the small room so that the floor surface can be easily painted.

SUMMARY OF INVENTION

[0005] However, in a module structure like that disclosed in JP2012-207430A, the floor surface can be painted because the facility/equipment component is floated up from the floor surface, but the operation for temporarily assembling the facilities/equipment according to the design in advance in the module structure using the hanging means became complex. Further, a module structure in which a plurality of facilities/equipment are temporarily assembled is heavy, and thus it was difficult to handle because it required a large crane or the like.

[0006] When performing installation work in such a building, it is preferable to dispose suspended scaffolding across the entire room so that this scaffolding can be utilized as installation scaffolding while ensuring that the floor surface is traversable so that facilities/equipment can be carried into the room.

However, in overseas construction sites, built-up scaffolding, in which framework and floorboards are built up from the floor surface, is most generally used, and the number of workers who have the advanced skills to assemble suspended scaffolding across an entire room in high places is limited. Therefore, in overseas construction work, an excessive amount of built-up scaffolding is assembled, and this has led to many cases in which the traversability of the floor surface cannot be ensured and thus the operation of carrying in facilities/equipment is obstructed.

[0007] The present invention was created in consideration of the above-described problems in the conventional technology, and an object of the present invention is to provide suspended scaffolding that facilitates the operation of carrying facilities/equipment into a small room and eliminates the need to repeatedly remove and erect installation scaffolding and to provide an installation method using the same.

[0008] As a first means for the achieving the above-mentioned object, the present invention provides suspended scaffolding including: a frame obtained by temporarily assembling columns and supports, wherein the frame can be carried in from a ceiling side of a small room in which a floor surface and wall surfaces have been formed, and the columns can be disposed at positions approximately overlapping with ceiling beams in a plan view of the small room and then partially removed after construction of a ceiling; scaffolding supports that can be connected to the columns, wherein each scaffolding support can be attached to a ceiling beam and an attachment position of the scaffolding support in the horizontal direction relative to the ceiling beam can be adjusted; and an installation operation scaffolding for performing an installation operation of a facility/equipment, wherein the installation operation scaffolding can be attached to the frame at a height position at which the facility/equipment can be carried in at the floor surface side of the small room.

[0009] As a second means for the achieving the above-mentioned object, the present invention provides the suspended scaffolding of the first means, wherein each scaffolding support includes a first cylindrical body, and a second cylindrical body that is disposed at an axial center of the first cylindrical body and threadedly engages with a shaft that can rotate around an axis, and wherein the second cylindrical body can extend/retract in the axial direction from the first cylindrical body.

[0010] As a third means for the achieving the above-mentioned object, the present invention provides the suspended scaffolding of the first and second means, further including a ceiling construction scaffolding that is attached to the frame, is carried in from the ceiling side together with the frame, and is removed after construction of the ceiling, and a wall finishing scaffolding that is attached to the frame, is carried in from the ceiling side together with the frame, and is removed after finishing the walls of the small room.

[0011] As a fourth means for the achieving the above-mentioned object, the present invention provides an installation method using suspended scaffolding, including: carrying a structure, in which a ceiling construction scaffolding, a wall finishing scaffolding, and an installation operation scaffolding are detachably temporarily assembled in a frame, into a small room in which a floor surface and wall surfaces have been formed; constructing a ceiling of the small room with the ceiling construction scaffolding; connecting scaffolding supports, which can be attached to ceiling beams after the ceiling has been constructed, the attachment position of each scaffolding support being adjustable in a horizontal or vertical direction relative to the ceiling beam, to columns of the frame and finishing the walls with the wall finishing scaffolding; dismantling the ceiling construction scaffolding, the wall finishing scaffolding, and some of the supports, and forming suspended scaffolding in which the installation operation scaffolding is suspended from the ceiling beams; and carrying facilities/equipment into the small room and installing the facilities/equipment from the installation operation scaffolding.

[0012] According to the above-described constitutions, the suspended scaffolding is mounted at a height position of the frame at which the operation of carrying in the facilities/equipment can be performed.

Therefore, the traversability of the floor surface side can be ensured, and the facilities/equipment can be easily carried into the small room.

Further, the facilities/equipment can be temporarily placed or installed using the suspended scaffolding as the main scaffolding, and thus it is not necessary to repeatedly remove and erect the scaffolding as in the conventional technology. In addition, the columns of the frame that are disposed in advance at positions approximately overlapping with the ceiling beams in a plan view of the small room can be easily suspended from the ceiling beams using the scaffolding supports, whose position in the horizontal direction can be adjusted, and thereby the suspended scaffolding can be attached.

[0013] According to the above-described constitutions, the scaffolding supports and the frame can be easily aligned in the vertical direction (any gaps in the up-down direction can be eliminated).

[0014] According to the above-described constitutions, when carrying the suspended scaffolding into the small room, since the scaffolding for constructing the ceiling and finishing the walls is mounted in the frame in advance, it is not necessary to erect any scaffolding when constructing the ceiling and finishing the walls, and thus the amount of work can be reduced.

[0015] According to the above-described constitutions, since the traversability of the floor surface side can be ensured, it is not necessary to perform a complex operation where the facility/equipment components must be temporarily assembled in advance using a hanging means such as wire hanging before carrying them in due to the inability to ensure the traversability as in the module structure of the conventional technology. Thus, the operation for carrying in the facilities/equipment and the operation for removing the scaffolding can be easily carried out.

BRIEF DESCRIPTION OF DRAWINGS

[0016] FIG. 1 is a perspective view illustrating an overview of a suspended scaffolding of the present invention; FIG. 2 is a plan view of the suspended scaffolding of the present invention; FIG. 3 is a front view of a scaffolding support; FIG. 4 is a side view of a scaffolding support; FIG. 5 is a partial cross-section view from the front of a scaffolding support excluding a connection means; and FIG. 6 is an explanatory view of an installation method using the suspended scaffolding of the present invention.

DESCRIPTION OF EMBODIMENTS

[0017] Embodiments of the suspended scaffolding and the installation method using the same of the present invention will be explained in detail below referring to the attached drawings. FIG. 1 is a perspective view illustrating an overview of a suspended scaffolding of the present invention. FIG. 2 is a plan view of the suspended scaffolding of the present invention. FIG. 3 is a front view of a scaffolding support. FIG. 4 is a side view of a scaffolding support. FIG. 5 is a partial cross-section view from the front of a scaffolding support excluding a connection means.

FIG. 6 is an explanatory view of an installation method using the suspended scaffolding of the present invention.

[0018] ISuspended Scaffolding 10] The suspended scaffolding 10 of the present invention is incorporated in a structure that can be utilized in a so-called pre-insertion method among construction methods. Also, an object to which the suspended scaffolding 10 of the present application is to be applied is a small room that is enclosed by concrete walls, in which equipment, piping, ducts, and cable trays are installed inside, or a building having a space-saving internal space. A structure 11 is obtained by temporarily assembling a plurality of frames and scaffolding, and has an approximately cuboid configuration such that it can be carried into a small room, in which a concrete floor surface 12 and concrete wall surfaces 14 are formed but a ceiling is not formed, from an opening on a ceiling side by a crane or the like. In the structure 11 which has been carried in, the legs of columns that constitute the frame are disposed on the floor surface 12, and a gap of a predetermined interval is provided between the wall surfaces 14 and the frame. This structure 11 can be used to perform operations such as construction of the ceiling and finishing of the wall surfaces using the scaffolding that was temporarily assembled in advance without having to temporarily assemble any scaffolding after carrying the structure 11 into the small room.

[0019] The suspended scaffolding 10 of the present invention has a basic constitution mainly including the following: a frame 20, installation operation scaffolding 30, scaffolding supports 40, ceiling construction scaffolding 60, wall finishing scaffolding 70, a ladder 80, and handrails 82.

[0020] IFrame 201 The frame 20 corresponds to a backbone portion of the structure 11 or the suspended scaffolding 10. The frame 20 consists of columns 22 and supports 24, and is assembled using detachable connecting fittings (not illustrated). The supports 24 are attached in the horizontal direction so as to span across multiple columns 22, and can increase the mechanical strength of the frame 20. As shown in FIG. 2, a plurality of ceiling beams 18 are formed in parallel at predetermined intervals on a ceiling 16 of the small room. The columns 22 of the present invention are disposed at positions approximately overlapping with the ceiling beams 18 of the ceiling 16 in a plan view of the small room. A flange 23 that can be connected to a flange part 55 of a scaffolding support 40 to be explained later (refer to FIGS. 3 and 4) is formed on a top end of each column 22.

[0021] [Installation Operation Scaffolding 30] The installation operation scaffolding 30 is scaffolding used for performing an operation of installing facilities/equipment. Some facilities/equipment such as piping 90 are temporarily placed in advance in the installation operation scaffolding 30 when carrying it in. The installation operation scaffolding 30 of the present invention is attached to the columns 22 at a height position at which an operation for carrying in facilities/equipment from a passageway opening 13 on the floor surface 12 can be carried out. As shown in FIG. 2, the installation operation scaffolding 30 is formed by disposing divided scaffolding boards across the entire plane thereof excluding an opening 30a for installing facilities/equipment, a ladder opening 30b, and the columns 22 in a plan view of the small room. Some facilities/equipment, i.e. the piping 90 in the present embodiment, are temporarily placed in the installation operation scaffolding 30. The installation operation scaffolding 30 can be utilized in an operation for installing subsequent facilities/equipment without being removed when removing a ceiling construction scaffolding 60 and a wall finishing scaffolding 70 to be explained later. Also, depending on the operation process, new installation operation scaffolding can be temporarily assembled using the installation operation scaffolding 30.

[0022] [Scaffolding Supports 40] As shown in FIGS. 3 to 5, each scaffolding support 40 has a basic constitution mainly including a connection means 42, a first cylindrical body 45, and a second cylindrical body 53.

[0023] The connection means 42 consists of a pair of connecting fittings, in which gripping parts 43 that grip both ends of a flange 19 (floor surface -10 -side) of a ceiling beam 18 (H-shaped steel) are formed at an upper part, and clamps 44 that grip a pipe 41 are formed at a lower part. The pipe 41 is disposed such that its axial direction runs in a direction orthogonal to a lengthwise direction of the ceiling beam 18, and is set to be slightly longer than the length of the flange 19. As one example of the gripping parts 43 in the present embodiment, C-shaped clamps that can grip the ends of the flange 19 are used. These gripping parts 43 can be fixed by tightening fastening bolts 431 in a thickness direction of the flange 19 from the ceiling side after inserting the ends of the flange 19 into the recessed parts of the gripping parts 43. Also, as one example of the clamps 44 used in the present embodiment, pipe clamps whose inner diameter is approximately the same as the diameter of the pipe 41 are used. Each clamp 44 can be fixed to the pipe 41 by attaching a pair of semicircular members that are rotatably connected at one end in a hinged manner along the radial direction of the pipe 41, and then tightening the other ends together with a fastening bolt 441. In the connection means 42 constituted as described above, the pipe 41 of a predetermined length is connected to the clamps 44 of the pair of connecting fittings, and then the flange 19 of the ceiling beam 18 is gripped by the gripping parts 43.

[0024] A flange 46 is formed at one end (top end) of the first cylindrical body 45, and a clamp part 47 is formed on the flange 46. The clamp part 47 is a pipe clamp that grips the pipe 41. The clamp part 47 can be fixed to the pipe 41 by attaching a pair of semicircular members that are rotatably connected at one end in a hinged manner along the radial direction of the pipe 41, and then tightening the other ends together with a fastening bolt 471. A first shaft 48 is attached on the inside of the first -11 -cylindrical body 45 (refer to FIG. 5). An axial center of the first shaft 48 is disposed concentrically with the axial center of the first cylindrical body 45. A head 49 of the first shaft 48 is rotatably supported by a thrust bearing, which consists of ball bearings 451 and a bearing receiver 452, on the inside of the first cylindrical body 45. A bevel gear is formed on the outer periphery of the head 49. Male threads 50 are formed on a surface of the shaft main body of the first shaft 48 to project from the other end (bottom end) of the first shaft 48 on the opposite side of the head 49. A second shaft 51 is attached to extend from an opening 45a formed in the peripheral surface of the first cylindrical body 45 in a direction in which its axial center is orthogonal to the axial center of the first shaft 48. A bevel gear is also formed on the outer periphery of a head 52 of the second shaft 51 similar to the head 49 of the first shaft 48, and the first shaft 48 and the second shaft 51 can rotate as their bevel gears engage with each other. The shaft main body of the second shaft 51 is formed in a hexagonal shape in a cross-section view. The second shaft 51 constituted as described above can be easily rotated forward and in reverse using a tool such as an impact wrench.

[0025] The second cylindrical body 53 is smaller in diameter than the first cylindrical body 45, and can be inserted into the first cylindrical body 45. Female threads 54 that threadedly engage with the male threads 50 are formed on the inside of one end (top end) side of the second cylindrical body 53. A ball bearing, which consists of ball bearings 531 and a bearing receiver 532, is formed annularly on an inner wall at the other end of the second cylindrical body 53. The flange part is provided with a flange inner cylinder 56 that can be inserted into the second cylindrical body 53. The flange inner cylinder is provided with a -12 -collar at its distal end, and is supported by the ball bearing so that it can rotate around an axis. The flange part 55 is formed in the same shape as the flange 23 formed on the top end of the column 22, and the flange part 55 and the flange 23 can be connected using a fastening bolt 551.

[0026] In the scaffolding support 40 constituted as described above, the clamps 44 of the connection means 42 and the clamp part 47 of the first cylindrical body 45 are temporarily fastened to the pipe 41 in advance.

The gripping parts 43 of the pair of connection means 42 are then temporarily fastened to both ends of the flange 19. Next, the flange part of the second cylindrical body 53 is connected to the flange 23 of the column 22 using the fastening bolt 551. Subsequently, the second shaft 51 is rotated using a tool such as an impact wrench to move the second cylindrical body 53 upwards or downwards. Thereby, the frame 20 can be connected and fixed to the ceiling beams 18.

[0027] [Ceiling Construction Scaffolding 601 The ceiling construction scaffolding 60 is scaffolding used when constructing the ceiling 16, and is formed on the upper most level of the structure 11. The ceiling construction scaffolding 60 is formed by disposing divided scaffolding boards across the entire plane of the frame in a plan view of the small room.

[0028] [Wall Finishing Scaffolding 70] The wall finishing scaffolding 70 is scaffolding used when performing an operation to finish the wall surfaces 14, and is formed in the structure 11 at a lower level than the ceiling construction scaffolding 60. The wall finishing scaffolding 70 should be formed on the four sides of the wall surfaces 14 in a plan view of the small room, and no scaffolding boards are attached at the center thereof.

-13 - [0029] In the wall finishing scaffolding 70 of the present embodiment, as one example, the wall finishing scaffolding 70 is attached at two levels at heights of 2 meters and 4 meters from the floor surface 12 in the case that the ceiling 16 is 7 to 8 meters from the floor surface 12. However, the wall finishing scaffolding 70 can also be formed at 3 or more levels based on labor regulations according to the height of the ceiling 16 of the small room.

[0030] FLadder 80] The ladder 80 is formed to span across each level of scaffolding from the floor surface 12 of the small room.

[0031] FHandrails 82] The handrails 82 are formed on the periphery of an opening of the wall finishing scaffolding 70, the periphery of the opening(s) for constructing the facilities/equipment formed in the installation operation scaffolding 30, and the like.

The suspended scaffolding 10 is temporarily assembled using detachable connection means, and then removed after completion of the operation for installing the facilities/equipment.

[0032] Flnstallation Method Using the Suspended Scaffolding] A method for installing facilities/equipment using the suspended scaffolding of the present invention constituted as described above will now be explained below.

[0033] The structure 11 is carried into the small room, in which the concrete floor surface 12 and wall surfaces 14 are formed but the ceiling 16 is not formed (A). The structure 11 includes the frame 20, the ceiling construction scaffolding 60, the wall finishing scaffolding 70, the installation operation scaffolding 30, the ladder 80, and the handrails 82.

-14 -In the structure 11, the ceiling construction scaffolding 60, the wall finishing scaffolding 70, and the installation operation scaffolding 30 are temporarily assembled in the frame 20 and facilities/equipment such as the piping 90 are temporarily placed in the installation operation scaffolding 30 in advance before carrying the structure 11 into the small room. Also, the passageway opening 13 for carrying in the facilities/equipment is formed on the floor surface 12 side of the small room. In the structure 11 that has been carried into the small room, legs of the columns 22 are mounted on the floor surface 12 and the ladder is attached from the floor surface 12 toward the ceiling 16 side. The ceiling construction scaffolding 60 is attached across the entire plane thereof in a plan view of the small room. The wall finishing scaffolding is formed in an annular shape along the wall surfaces 14 in a plan view of the small room. The handrails 82 are attached on the center side of the wall finishing scaffolding 70.

[0034] The ceiling 16 is constructed from the ceiling construction scaffolding 60 of the structure 11(B). As one example, the ceiling construction scaffolding 60 is attached at a height of 5 to 6 meters from the floor surface 12 when the ceiling 16 is to be 7 to 8 meters from the floor surface 12. After formation of the ceiling 16, a finishing operation such as painting the ceiling 16 is performed from the ceiling construction scaffolding 60, and an operation for mounting a hoist or the like that is attached to the ceiling 16 is also performed. In this way, since the ceiling construction scaffolding 60 is temporarily assembled in advance in the structure 11, the operation for constructing the ceiling can be carried out quickly after carrying in the structure 11.

[0035] Next, the scaffolding supports 40 are attached using the ceiling -15 -construction scaffolding 60, and the operation for finishing the wall surfaces 14 is carried out using the wall finishing scaffolding 70 (C). The scaffolding supports 40 are attached from the ceiling construction scaffolding 60. In each scaffolding support 40, the clamps 44 of the connection means 42 and the clamp part 47 of the first cylindrical body are temporarily fastened to the pipe 41 in advance.

[0036] First, the gripping parts 43 of the connection means 42 are attached to a ceiling beam 18 of the ceiling 16. After inserting the ends of the flange 19 into the recessed parts of the gripping parts 43, the fastening bolts 431 are tightened in the thickness direction of the flange 19 from the ceiling side to temporarily fasten the gripping parts 43 to the flange 19. Next, the flange part 55 of the second cylindrical body 53 is connected to the flange 23 of the column 22 using the fastening bolt 551.

At this time, the gripping position on the flange 19 by the gripping parts 43 of the connection means 42 and the gripping position of the clamp part 47 that grips the pipe 41 are adjusted in accordance with the column 22. Once this horizontal direction position adjustment has been completed, the second shaft 51 is rotated using a tool such as an impact wrench to move the second cylindrical body 53 upwards or downwards and adjust the position in the vertical direction. Thereby, the frame 20 can be connected and fixed to the ceiling beams 18.

[0037] Finishing of the wall surfaces such as painting of the wall surfaces 14 is carried out using the wall finishing scaffolding 70. As one example, the wall finishing scaffolding 70 is attached at heights of 2 meters and 4 meters from the floor surface 12 when the ceiling 16 is 7 to 8 meters from the floor surface 12.

After the operation for finishing the wall surfaces has been -16 -completed, the ceiling construction scaffolding 60, the wall finishing scaffolding 70, and a portion of the frame 20 are removed, and the suspended scaffolding 10 is formed (D). The suspended scaffolding 10 is attached at a height at which the operation for carrying in facilities/equipment on the floor surface 12 side can be carried out. As one example, the installation operation scaffolding 30 is attached to the frame 20 at a height position of 3 meters from the floor surface 12 when the ceiling 16 of the small room is 7 to 8 meters from the floor surface 12.

[0038] Facilities/equipment 92 are carried into the small room from the passageway opening 13 on the floor surface 12 side (E). Since the frame of the structure 11 is removed on the floor surface 12 side and the installation operation scaffolding 30 of the suspended scaffolding 10 is attached at a height at which the operation for carrying in the facilities/equipment can be carried out, the facilities/equipment 92 can be easily carried into the small room.

The operation for installing the facilities/equipment 92 is carried out using the installation operation scaffolding 30 (F). After the installation is complete, an operation for removing the suspended scaffolding 10 is carried out.

[0039] According to the suspended scaffolding of the present invention and the installation method using the same, since the suspended scaffolding is mounted at a height position on the frame at which the operation for carrying in the facilities/equipment can be carried out, the traversability of the floor surface can be ensured, and the facilities/equipment can be easily carried into the small room. Further, the facilities/equipment can be temporarily placed or installed using the suspended scaffolding as the main scaffolding, and thus it is not -17 -necessary to repeatedly remove and erect the scaffolding according to the construction operation of the building as in the conventional technology.

In addition, the columns of the frame that are disposed in advance near the ceiling beams in a plan view can be easily suspended from the ceiling beams using the scaffolding supports, whose position in the horizontal arid vertical directions can be adjusted.

[0040] The suspended scaffolding of the present invention and the installation method using the same are particularly useful in a pre-insertion method of a building in which concrete walls are formed.

DESCRIPTION OF REFERENCE NUMERALS

[0041] 10: suspended scaffolding, 11: structure, 12: floor surface, 13: passageway opening, 14: wall surface, 16: ceiling, 18: ceiling beam, 19: flange, 20: frame, 22: column, 23: flange, 24: support, 30: installation operation scaffolding, 40: scaffolding support, 41: pipe, 42: connection means, 43: gripping part, 44: clamp, 45: first cylindrical body, 46: flange, 47: clamp part, 48: first shaft, 49: head, 50: male thread, 51: second shaft, 52: head, 53: second cylindrical body, 54: female thread, 55: flange part, 56: flange inner cylinder, 60: ceiling construction scaffolding, 70: wall finishing scaffolding, 80: ladder, 82: handrail, 90: piping, 92: facilities/equipment.

Claims

-18 -CLAIMS1. Suspended scaffolding, comprising: a frame obtained by temporarily assembling columns and supports, wherein the frame can be carried in from a ceiling side of a small room in which a floor surface and wall surfaces have been formed, and the columns can be disposed at positions approximately overlapping with ceiling beams in a plan view of the small room and then partially removed after construction of a ceiling; scaffolding supports that can be connected to the columns, wherein each scaffolding support can be attached to a ceiling beam and an attachment position of the scaffolding support in a horizontal direction relative to the ceiling beam can be adjusted; and an installation operation scaffolding for performing an installation operation of a facility/equipment, wherein the installation operation scaffolding can be attached to the frame at a height position at which the facility/equipment can be carried in at the floor surface side of the small room.
2. The suspended scaffolding according to claim 1, wherein each scaffolding support comprises a first cylindrical body and a second cylindrical body that is disposed at an axial center of the first cylindrical body and threadedly engages with a shaft that can rotate around an axis, and wherein the second cylindrical body can extend/retract in an axial direction from/into the first cylindrical body.
3. The suspended scaffolding according to claim 1 or claim 2, further comprising: -19 -a ceiling construction scaffolding that is attached to the frame, is carried in from the ceiling side together with the frame, and is removed after construction of the ceiling, and a wall finishing scaffolding that is attached to the frame, is carried in from the ceiling side together with the frame, and is removed after finishing walls of the small room.
4. An installation method using suspended scaffolding, comprising: carrying a structure, in which a ceiling construction scaffolding, a wall finishing scaffolding, and an installation operation scaffolding are detachably temporarily assembled in a frame, into a small room in which a floor surface and wall surfaces have been formed; constructing a ceiling of the small room with the ceiling construction scaffolding; connecting scaffolding supports, which can be attached to ceiling beams after the ceiling has been constructed, the attachment position of each scaffolding support being adjustable in a horizontal or vertical direction relative to the ceiling beam, to columns of the frame and finishing walls with the wall finishing scaffolding; dismantling the ceiling construction scaffolding, the wall finishing scaffolding, and some of the supports, and forming suspended scaffolding in which the installation operation scaffolding is suspended from the ceiling beams; and carrying facilities/equipment into the small room and installing the facilities/equipment from the installation operation scaffolding.