Method for installing Anti-scattering net

Abstract

To provide a method for installing an anti-scattering net, the method reducing time and effort required to replace brackets for hanging the anti-scattering net, the replacement being carried out every time a construction layer changes, in constructing a building having an overhanging floor supported by an overhanging beam protruding from an outer perimeter pillar of the building to the horizontal outer side of the building.SOLUTION: A method for installing an anti-scattering net, in which an anti-scattering net 15 suspended at a position farther outward than an outside scaffolding 11 temporarily installed outside a building under construction is installed immediately after an outer perimeter pillar 2 is erected at a construction layer, wherein an overhanging beam 4 protruding from an upper part of the outer perimeter pillar 2 to the horizontal outer side of the building is provided, an overhanging bracket 14 provided with a hoist 16 on its outer end side is attached to the outer end side of the overhanging beam 4 in a form protruding to the horizontal outer side of the building 1 from the overhanging beam 4, and the anti-scattering net 15 is suspended by the hoist 16.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a method for installing a splash prevention net that is suspended at a position outside an external scaffold temporarily installed on the outside of a building under construction, and is installed immediately after the erection of the outer peripheral columns at the construction layer.

Background Art

[0002] As the background art of the present invention, for example, before or after installing a column member on a building body, a temporary member is installed on the column head of the column member, and a curing net is hoisted and vertically installed by a hoist installed at the outer end of the temporary member. In this method of attaching the curing net, the temporary member projects from the column head of the column member toward the outside of the building body to the outside of the space for the external scaffold, so that the curing net is vertically installed outside the building rather than outside the external scaffold (see, for example, Patent Document 1).

[0003] In addition, there is a building construction method in which an outer peripheral steel column with a bracket for attaching a vertical curing net is temporarily fixed on an outer peripheral steel column where the steel frame construction is completed, and then a temporary beam is erected between the brackets, and the vertical curing net is attached to this temporary beam. In this building construction method, the vertical curing net is attached outside the building rather than outside the temporary scaffold. In addition, the bracket for attaching the vertical curing net has a rising portion extending upward (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the methods described in Patent Documents 1 and 2, a temporary member or bracket for attaching a curing net is attached to a column member or an outer peripheral steel column. For example, when constructing a building having a cantilever floor supported by a cantilever beam that projects laterally outward from the outer peripheral column of the building, depending on the cantilever length of the cantilever floor, the cantilever length of the temporary member or bracket toward the laterally outer side of the building becomes longer, and as a result, the bending stress applied to the temporary metal fittings or bracket increases. Therefore, as the temporary metal fittings or bracket, a large and difficult-to-handle one with a long cantilever length and a large section modulus is used, which increases the labor required for replacing the temporary metal fittings or bracket every time the construction floor changes.

[0006] In view of this situation, the main problem of the present invention is to reduce the labor required for replacing the bracket for suspending the anti-scattering net every time the construction floor changes when constructing a building having a cantilever floor supported by a cantilever beam that projects laterally outward from the outer peripheral column of the building.

Means for Solving the Problems

[0007] A first characteristic configuration of the present invention is a method for installing an anti-scattering net, which is installed immediately after the outer peripheral column at the construction floor is rebuilt, and is suspended at a position outside the external scaffold temporarily installed outside the building under construction. A cantilever beam that projects laterally outward from the upper part of the outer peripheral column is provided. A cantilever bracket equipped with a hoist on the outer end side is attached to the outer end side of the cantilever beam in a form that projects laterally outward from the cantilever beam, and the anti-scattering net is suspended by the hoist.

[0008] According to this configuration, when constructing a building having a cantilever floor supported by a cantilever beam that projects horizontally outward from the outer peripheral columns of the building, the cantilever bracket is attached not to the column head of the outer peripheral column but to the outer end side of the cantilever beam that projects horizontally outward from the upper part of the outer peripheral column in the horizontal outward direction of the building to support the cantilever floor, and in a form that further projects horizontally outward from the cantilever beam in the horizontal outward direction of the building. As a result, the length of the cantilever bracket projecting horizontally outward on the outer side of the building can be shortened. Thereby, the bending stress applied to the cantilever bracket can be reduced, and as the cantilever bracket, a small and easy-to-handle one with a short cantilever length and a small section modulus can be used. As a result, the labor required for replacing the cantilever brackets, which is carried out every time the construction floor changes, can be reduced.

[0009] Also, while using a small and easy-to-handle cantilever bracket, the anti-scattering net can be suspended at a position further outside than the external scaffold temporarily installed on the outside of the cantilever floor, in a state where it is lifted by the hoist of the cantilever bracket to the height position of the cantilever bracket attached to the cantilever beam at the upper part of the outer peripheral column. As a result, during the construction of the building, the occurrence of inconveniences such as materials such as bolts and nuts or welding sparks scattering to the outside can be prevented by the anti-scattering net.

[0010] The second characteristic configuration of the present invention lies in that the cantilever bracket is provided with a rising portion extending upward from the cantilever beam.

[0011] According to this configuration, the anti-scattering net can be suspended from a position higher than the cantilever beam according to the rising height of the rising portion provided on the cantilever bracket. As a result, in the process of erecting the outer peripheral beam across adjacent outer peripheral columns carried out near the height of the cantilever beam, the occurrence of inconveniences such as materials such as bolts and nuts or welding sparks scattering outside beyond the anti-scattering net can be more reliably prevented.

[0012] The third characteristic configuration of the present invention lies in that a reaction force receiving member for receiving the suspension reaction force of the splash prevention net is installed across the upper end of the rising portion and the upper end of the outer peripheral column.

[0013] According to this configuration, by utilizing the upper part of the outer peripheral column with high rigidity, the suspension reaction force of the jump-out bracket for suspending and supporting the splash prevention net can be reasonably taken.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0015] Hereinafter, an example of an embodiment for carrying out the installation method of the splash prevention net according to the present invention will be described with reference to the drawings. It should be noted that the installation method of the splash prevention net according to the present invention is for installing the splash prevention net in a state of covering the entire circumference of the lateral outer side of the building under construction together with an external scaffold temporarily installed adjacent to the lateral outer side of the building. However, in FIGS. 2 to 9, descriptions of the splash prevention net and the external scaffold installed on the back side of the building are omitted.

[0016] In this embodiment, as shown in FIG. 1, the method for installing the anti-scattering net according to the present invention is applied to a building 1 having a projecting floor 3 that projects outward from the outer peripheral columns 2 of the building 1 to the outer side of the building 1 (the left side and the back side in FIG. 1). An example of a form applied to the case of construction by a laminated construction method in which the structure and the like are assembled and stacked layer by layer is shown. In addition, in this embodiment, as an example of the laminated construction method, a method of constructing two floors as one layer is illustrated, but it is not limited to this, and a method of constructing one floor or three or more floors as one layer may be used. Further, as the building 1 constructed by this laminated construction method, a steel frame building is illustrated, but it is not limited to this, and a reinforced concrete building, a steel frame reinforced concrete building, or the like may be used.

[0017] As shown in FIGS. 1 to 2, each outer peripheral column 2 is a steel frame column in which two floors are segmented into one section, and a bracket 2B for beam connection made of H-shaped steel and an erection piece 2C for column connection made of steel plate are welded to a column main material 2A made of square steel pipe. It is configured by being joined. The brackets 2B for beam connection are welded to the upper floor beam erection height position and the lower floor beam erection height position on each column surface of each column main material 2A. The erection pieces 2C for column connection are welded to the upper and lower ends of each column surface of each column main material 2A. In addition, in this embodiment, as an example of the outer peripheral column 2, a column in which two floors are segmented into one section is illustrated, but it is not limited to this, and a column in which one floor or three or more floors are segmented into one section may be used.

[0018] Among the brackets 2B for beam connection, a projecting beam 4 that projects laterally outward from the building 1 is bolted to an outward projecting bracket 2Ba that extends laterally outward of the building 1 via a splice plate 5. An outer peripheral beam 6 installed between adjacent outer peripheral columns 2 or an internal beam 7 installed between an adjacent outer peripheral column 2 and an inner column (not shown) is bolted to the brackets 2Bb other than the outward projecting brackets 2Ba via a splice plate 8. The projecting beam 4, the outer peripheral beam 6, and the internal beam 7 are steel frame beams made of H-shaped steel.

[0019] Although illustration is omitted, the spring-out floor 3 is constructed by installing a half-PCa floor slab supported by outward brackets 2Ba and spring-out beams 4, then arranging upper reinforcement bars and placing top concrete.

[0020] As shown in Figs. 1 to 2, outside the building 1, an external scaffold 11 used as a working scaffold when installing exterior finishing materials such as the body edge member 9 and the outer wall panel 10 at the construction layer is temporarily installed. The external scaffold 11 is assembled with a scaffold portion 11A used for installing the body edge member 9, the outer wall panel 10, etc. at the construction layer each time the construction of the peripheral columns 2, peripheral beams 6, etc. at the construction layer is completed, and is fixed to the spring-out beam 4 by a connecting member 12. On the outside of the external scaffold 11, a curing net 13 is provided to prevent materials such as bolts and nuts or welding sparks from scattering outside during the work on the external scaffold 11. Note that the curing net 13 may be a sheet-like one with small mesh.

[0021] As shown in Figs. 3 to 4, the peripheral column 2 built in at the construction layer is provided with a spring-out beam 4A for the upper floor that springs out horizontally outward from the upper part of the peripheral column 2 in the horizontal outward direction of the building 1 and a spring-out beam 4B for the lower floor that springs out horizontally outward from the middle part between the upper and lower parts of the peripheral column 2 in the horizontal outward direction of the building 1 as spring-out beams 4. Also, a part of the vertical base member 9A in the body edge member 9 is pre-assembled at the outer end of each spring-out beam 4A, 4B. And a spring-out bracket 14 that further springs out in the horizontal outward direction of the building 1 from this spring-out beam 4A is attached to the outer end side of the spring-out beam 4A for the upper floor.

[0022] The projecting bracket 14 includes a rising portion 14A extending upward from the projecting beam 4A for the upper floor, and a projecting portion 14B projecting laterally outward from the upper end of the rising portion 14A of the building 1. And, on the outer end side of the projecting portion 14B of the projecting bracket 14, an electric hoist 16 for suspending a splash prevention net 15 hanging down at a position outside the external scaffold 11 is provided at the height position of the construction layer. Further, a reaction force receiving member 17 for receiving the suspension reaction force of the splash prevention net 15 is installed across the upper end of the rising portion 14A of the projecting bracket 14 and the upper end of the outer peripheral column 2.

[0023] As shown in FIGS. 4 to 6, an upper pipe member 15A suspended from the suspension fitting 16A of the hoist 16 via a ball-hanging wire 18 is provided at the upper end of the splash prevention net 15. A lower pipe member 15B fixed to the upper end of the external scaffold 11 via a fixture (not shown) is provided at the lower end of the splash prevention net 15. As shown in FIGS. 3 and 7, when not in use, the splash prevention net 15 is placed on the uppermost stage of the external scaffold 11 in a state of being wound around the lower pipe member 15B. In addition, the splash prevention net 15 may be a sheet-like one with a small mesh.

[0024] As shown in FIGS. 3 to 4, the reaction force receiving member 17 is provided with a wire rope 19 having one end connected to the upper end of the rising portion 14A, and a lever hoist 20 extending between the other end of the wire rope 19 and the erection piece 2C outside the upper end of the outer peripheral column 2. The reaction force receiving member 17 can be adjusted to a tension state suitable for receiving the suspension reaction force of the splash prevention net 15 by operating the lever hoist 20.

[0025] The laminated construction method exemplified in this embodiment includes the outer peripheral column erection step shown in FIG. 2, the spring-out bracket attachment step shown in FIG. 3, the splash prevention net suspension step shown in FIG. 4, the outer peripheral beam erection step shown in FIG. 5, the scaffold installation step shown in FIG. 6, the spring-out bracket removal step shown in FIG. 7, the exterior material installation step shown in FIG. 8, and the suspension scaffold removal step shown in FIG. 9. Then, these steps are carried out on the construction layer in the order of description, and every time all the steps are completed, the construction layer is moved to the upper layer and carried out in the same procedure, and this is repeated until the top layer is reached, thereby constructing the outer peripheral side of the structure in the building 1 having the spring-out floor 3 described above.

[0026] Hereinafter, each of the above steps carried out by the laminated construction method exemplified in this embodiment will be described according to the procedure. Incidentally, here, the description will be made from the stage where the implementation of each step at a predetermined layer is completed and the construction layer is moved to its upper layer.

[0027] First, the outer peripheral column erection step shown in FIG. 2 is carried out. In this outer peripheral column erection step, the outer peripheral column 2 to be erected on the construction layer is lifted using a hoist outside the figure, and temporarily placed on the outer peripheral column 2 where the steel frame construction has been completed on the layer directly below the construction layer. Then, the lower end erection piece 2C provided on the outer peripheral column 2 of the construction layer in the temporarily placed state and the upper end erection piece 2C provided on the outer peripheral column 2 of the directly lower layer are bolted together in a state of being sandwiched by a pair of joining plates 21, thereby temporarily joining the outer peripheral column 2 of the construction layer to the outer peripheral column 2 of the directly lower layer. And by carrying out such temporary joining of the outer peripheral column 2 for all the outer peripheral columns 2 to be erected on the construction layer, the outer peripheral column erection step on the construction layer is completed. Incidentally, on the outer peripheral column 2 to be erected on the construction layer, a part of the spring-out beam 4 and a part of the vertical base member 9A in the barrel edge member 9 are prefabricated at a prefabrication yard near the construction site. Also, the outer peripheral column 2 of the construction layer is finally joined to the outer peripheral column 2 of the directly lower layer by being welded to the outer peripheral column 2 of the directly lower layer after the beam insertion and the like on the construction layer are completed. And at this timing, the erection pieces 2C provided on each of the outer peripheral columns 2 of the construction layer and the directly lower layer are cut. As for the process of building the outer peripheral columns, it may be the case that only the spring-out beam 4 is prefabricated in a prefabrication yard or the like and the prefabricated outer peripheral columns 2 are built into the construction floor.

[0028] When the process of building the outer peripheral columns on the construction floor is completed, the process of attaching the spring-out brackets shown in Fig. 3 is carried out. In this process of attaching the spring-out brackets, the spring-out brackets 14 are lifted using a hoisting machine (not shown in the figure), and the lower end of the rising portion 14A of the spring-out brackets 14 is temporarily placed on the outer end side of the spring-out beam 4 provided on the outer peripheral columns 2 of the construction floor. Then, the temporarily placed lower end of the rising portion 14A is temporarily installed on the outer end side of the spring-out beam 4 by bolt connection or connection with a clamping fitting (not shown in the figure). Also, a reaction force receiving member 17 is installed across the upper end of the rising portion 14A and the erection piece 2C on the outer side of the upper end of the outer peripheral column 2. And by performing such temporary installation of the spring-out brackets 14 and installation of the reaction force receiving member 17 for all the outer peripheral columns 2 and spring-out beams 4 on the construction floor, the process of attaching the spring-out brackets on the construction floor is completed. Incidentally, an electric hoist 16 is prefabricated on the outer end side of each spring-out bracket 14 in a prefabrication yard near the construction site or the like.

[0029] When the process of attaching the spring-out brackets on the construction floor is completed, the process of suspending the anti-scattering net shown in Fig. 4 is carried out. In this process of suspending the anti-scattering net, the hanging fitting 16A of the hoist 16 is lowered, and after hooking the hanging wire 18 to the upper pipe member 15A of the anti-scattering net 15 placed on the uppermost stage of the external scaffold 11 in a wound-up state, the hanging fitting 16A of the hoist 16 is raised to pull up the upper side of the anti-scattering net 15. Also, at the stage when this pulling-up is completed, the lower pipe member 15B of the anti-scattering net 15 is fixed to the upper end of the external scaffold 11 with a fixing tool. And by performing such pulling-up and fixing of all the anti-scattering nets 15, and suspending each anti-scattering net 15 at a position outside the external scaffold 11, the process of suspending the anti-scattering net on the construction floor is completed.

[0030] When the process of suspending the splash prevention net on the construction floor is completed, the outer peripheral beam erection process shown in Fig. 5 is carried out. In this outer peripheral beam erection process, the outer peripheral beam 6 with the suspension scaffolds 22 temporarily installed at both ends in the prefabrication yard near the construction site or the like is lifted using a hoisting machine outside the drawing and hoisted into the space between two outer peripheral columns 2 on the construction floor. Also, the beam ends of the hoisted outer peripheral beam 6 are bolted to the brackets 2Bb of the adjacent outer peripheral columns 2 via the splice plates 8 using the suspension scaffolds 22. Then, by performing such hoisting and bolt joining of the outer peripheral beam 6 for all the outer peripheral columns 2 on the construction floor, the outer peripheral beam erection process on the construction floor is completed.

[0031] When the outer peripheral beam erection process on the construction floor is completed, the scaffold installation process shown in Fig. 6 is carried out. In this scaffold installation process, the suspension scaffold 23 is temporarily installed on the side of the cantilever beam 4 of the outer peripheral column 2, and the scaffold part 11A used for the installation work of the body edge member 9, the outer wall panel 10, etc. on the construction floor is assembled onto the external scaffold 11. When the scaffold part 11A is assembled in this way, the splash prevention net 13 of the scaffold part 11A prevents the scattering of materials such as bolts and nuts from the construction floor to the outside or external objects such as welding sparks, and the splash prevention net 15 becomes unnecessary. Therefore, although not shown in the drawing, the hanging fitting 16A of the hoist 16 is lowered, and while lowering the upper side of the splash prevention net 15 toward the lower pipe member 15B, the splash prevention net 15 is wound up by the lower pipe member 15B. Also, the wound-up splash prevention net 15 is hoisted by the hoist 16 to the uppermost stage of the external scaffold 11 and placed on the uppermost stage of the external scaffold 11. Then, by performing such temporary installation of the suspension scaffold 23 and assembly of the scaffold part 11A for all the outer peripheral columns 2 and all the external scaffolds 11 on the construction floor, and placing all the external scaffolds 11 in a wound-up state on the uppermost stage of the external scaffold 11, the scaffold installation process on the construction floor is completed.

[0032] When the scaffolding installation process on the construction floor is completed, the spring-out bracket removal process shown in Fig. 7 is carried out. In this spring-out bracket removal process, after suspending the lifting fitting 25 of the hoist to the spring-out bracket 14 temporarily installed on the outer peripheral column 2 via the hanging wire 24, the spring-out bracket 14 temporarily installed on the outer peripheral column 2 is removed from the outer peripheral column 2 using the suspended scaffold 23 temporarily installed on the side of the spring-out beam 4 of the outer peripheral column 2. Also, the removed spring-out bracket 14 is lifted using a hoist and carried out to the prefabrication yard near the construction site. Then, by performing such removal and carrying out of all the spring-out brackets 14, the spring-out bracket removal process on the construction floor is completed.

[0033] When the spring-out bracket removal process on the construction floor is completed, the exterior material installation process shown in Fig. 8 is carried out. In this exterior material installation process, using the external scaffold 11, the body edge member 9 including the remaining vertical base members 9B etc. is assembled to the upper and lower spring-out beams 4 and some of the pre-assembled vertical base members 9A etc. on the outer peripheral column 2. Also, the outer wall panel 10 is lifted using a hoist, suspended between the body edge member 9 and the external scaffold 11, and then attached to the body edge member 9 on the construction floor. Then, by performing such assembly of the body edge member 9 and attachment of the outer wall panel 10 over the entire outer periphery of the construction floor, the exterior material installation process on the construction floor is completed.

[0034] When the exterior material installation process on the construction floor is completed, the suspended scaffold removal process shown in Fig. 9 is carried out. In this suspended scaffold removal process, after releasing the fixation of the suspended scaffolds 22, 23 to the outer peripheral beam 6, spring-out beam 4 etc., the suspended scaffolds 22, 23 are lifted using a hoist and carried out to the prefabrication yard near the construction site. Then, by performing such release of fixation and carrying out of all the suspended scaffolds 22, 23, the suspended scaffold removal process on the construction floor is completed.

[0035] When the suspended scaffold removal process on the construction floor is completed, the construction floor is moved to the upper floor and the above-mentioned each process is carried out in the same procedure, and the above-mentioned each process is repeated in the same procedure until the top floor is reached.

[0036] That is, in the method for installing the anti-scattering net according to the present invention, immediately after performing the outer peripheral column erection step shown in FIG. 2, by performing the spring-out bracket attachment step shown in FIG. 3 and the anti-scattering net suspension step shown in FIG. 4, the anti-scattering net 15 suspended at a position outside the external scaffold 11 temporarily installed on the outside of the building 1 under construction can be installed immediately after the erection of the outer peripheral column 2 at the construction layer.

[0037] And in the spring-out bracket attachment step, as shown in FIG. 3, the spring-out bracket 14 is attached not to the column head of the outer peripheral column 2 but to the outer end side of the spring-out beam 4A that springs out laterally outward from the building 1 from the upper part of the outer peripheral column 2 to support the spring-out floor 3 in a form that further springs out laterally outward from the spring-out beam 4A. As a result, the spring-out length of the spring-out bracket 14 toward the laterally outer side of the building 1 can be shortened. Thereby, the bending stress applied to the spring-out bracket 14 can be reduced, and as the spring-out bracket 14, a small-sized and easy-to-handle one with a short spring-out length and a small sectional modulus can be used. As a result, the labor required for replacing the spring-out bracket 14 performed each time the construction layer changes can be reduced.

[0038] Also, in the spring-out bracket attachment step, a reaction force receiving member 17 that receives the suspension reaction force of the anti-scattering net 15 is installed across the upper end of the rising part 14A of the spring-out bracket 14 and the upper end of the outer peripheral column 2. As a result, by using the upper part of the outer peripheral column 2 with high rigidity, the suspension reaction force of the spring-out bracket 14 that suspends and supports the anti-scattering net 15 can be reasonably taken.

[0039] Moreover, while using a small and easy-to-handle pop-out bracket 14, in the step of suspending the splash-proof net, as shown in FIG. 4, the splash-proof net 15 is lifted by the hoist 16 of the pop-out bracket 14 to the height position of the pop-out bracket 14 attached to the pop-out beam 4 at the upper part of the outer peripheral column 2, and can be suspended at a position further outside than the external scaffold 11 temporarily installed outside the pop-out floor 3. In addition, the pop-out bracket 14 is provided with a rising part 14A extending upward from the pop-out beam 4, and since the hoist 16 is provided on the pop-out part 14B provided at the upper end of this rising part 14A, the splash-proof net 15 can be suspended from a position higher than the pop-out beam 4 according to the rising height of the rising part 14A. As a result, it is possible to more reliably prevent the occurrence of inconveniences such as materials such as bolts and nuts or welding sparks flying outside beyond the splash-proof net 15 during the construction of the building 1.

[0040] 〔Alternative Embodiment〕 An alternative embodiment of the present invention will be described. Note that the configurations of the respective alternative embodiments described below are not limited to being applied individually, and can also be applied in combination with the configurations of the above-described embodiment and other alternative embodiments.

[0041] (1) In the above-described embodiment, as a method for installing the splash-proof net, an example was given in which the pop-out bracket 14 is attached to the outer end side of the pop-out beam 4 in the step of attaching the pop-out bracket in the laminated construction method. However, it is not limited to this. For example, at a prefabrication yard near the construction site, the pop-out bracket 14 is attached to the outer end side of the pop-out beam 4 prefabricated on the outer peripheral column 2, and when the outer peripheral column 2 is built into the construction layer in the outer peripheral column building process, the pop-out bracket 14 may be installed at a predetermined position of the construction layer.

[0042] (2) In the above-described embodiment, as the reaction force receiving member 17 that receives the suspension reaction force of the splash prevention net 15, an example was given of one provided with a wire rope 19 and a lever hoist 20. However, the present invention is not limited to this. For example, one provided with a wire rope and a turnbuckle may also be used.

[0043] (3) In the above-described embodiment, as an example of the non-use of the splash prevention net 15, the splash prevention net 15 was placed on the uppermost stage of the external scaffold 11 in a state of being wound around the lower pipe member 15B. However, the present invention is not limited to this. For example, the splash prevention net 15 may be placed on the uppermost stage of the external scaffold 11 in a state of being folded vertically.

Explanation of Reference Numerals

[0044] 1 Building 2 Outer Peripheral Column 4 Rebound Beam 11 External Scaffold 14 Rebound Bracket 14A Rising Portion 15 Splash Prevention Net 16 Hoist 17 Reaction Force Receiving Member

Claims

1. A method for installing a splash prevention net that is suspended at a position outside an external scaffold temporarily installed outside a building under construction, the method being to install the splash prevention net immediately after the outer peripheral columns at the construction layer are rebuilt, wherein a projecting beam that projects laterally outward from the building in the horizontal direction is provided at the upper part of the outer peripheral column, and a projecting bracket equipped with a hoist on the outer end side is attached to the outer end side of the projecting beam in a form that projects laterally outward from the building, and the splash prevention net is suspended by the hoist. A method for installing a splash prevention net.

2. The method for installing a splash prevention net according to claim 1, wherein the projecting bracket is provided with a rising portion that extends upward from the projecting beam.

3. The method for installing a splash prevention net according to claim 2, wherein a reaction force receiving member that receives the suspension reaction force of the splash prevention net is installed across the upper end portion of the rising portion and the upper end portion of the outer peripheral column.

Images