JP4087955B2 - Building with outdoor staircase - Google Patents

Description

[0001]
[Industrial application fields]
TECHNICAL FIELD The present invention relates to a building with an outdoor staircase and a structure for mounting a staircase board so that a part of a living room space is formed below an outdoor staircase.
[0002]
[Prior art]
As this type of building with an outdoor staircase, for example, a type that does not use a rooftop as shown in FIG. 11 is considered. This building includes a building unit 1 with a staircase, a building unit 2 for a living room connected to the side of the building unit 1 with a staircase, and building units 3 and 4 arranged on the building units 1 and 2. And the building unit 1 with a stair has the living room part 5 and the outdoor staircase 6 integrally. Therefore, it is possible to go up and down to the second floor by using the outdoor staircase 6.
[0003]
In this building, in consideration of maintenance, a structure as shown in FIG. The outdoor staircase 6 includes right and left sloped girder (not shown), a number of step plates 7 that are spanned between the girder beams and are arranged at equal pitches along the girder beam, and upper and lower step plates. 7 has a board 8 that closes between 7 and 7. In addition, bolts 9 and 10 are projected downward on the front and rear portions of the step plate 7, and the upper end portion of the solder plate 8 is fixed to the front portion of the lower surface of the upper step plate 7 with the bolt 9 and the nut 9 a. In addition, the lower end portion of the solder plate 7 is fixed to the lower rear portion of the lower step plate 7 with a bolt 10 and a nut 10a.
[0004]
In such a building with an outdoor staircase, as shown in FIG. 11, since nothing is provided below the outdoor staircase 6, the structure of the outdoor staircase 6 is as shown in FIG. Even if a simple structure is adopted, it is possible to operate the nuts 9a and 10a from below the outdoor staircase 6 and to easily assemble and disassemble the outdoor staircase 6 from below.
[0005]
Moreover, as a building with an outdoor staircase, for example, as shown in FIG. 13, there is a type in which the building is composed of three layers as a whole and uses the rooftop. The first level of this building has four rectangular parallelepiped building units 11 fixed in a 2 × 2 arrangement on a foundation (not shown), and the second level has a 2 × 2 arrangement on the first level. There are four fixed building units 12 for a room. In addition, the third floor has three cuboid building units 13 and a building unit 14 with stairs stacked on these two floors, and a balcony 15 is provided.
[0006]
The building unit 14 with stairs described above has a box-shaped living room portion 16 and an outdoor staircase 17 provided outside the living room portion 16. And by using this outdoor staircase 17, it is possible to go up from the balcony 15 to the rooftop 18. In addition, a living room space 19 is formed in the living room portion 16 as shown in FIG. 14, and below the outdoor staircase 17 is a step-down space 19 a continuous to the living room space 19 as shown in FIGS. 14 and 15. Is formed.
[0007]
[Problems to be solved by the invention]
In this building, since the staircase space 19a is used as a part of the living room space 19 as described above, it is necessary to prevent rain leakage from the outdoor staircase 17 to the substairs space 19a during rainy weather. In this case, it is desirable that the structure for preventing rain leakage be as simple as possible.
[0008]
In addition, when this structure for preventing rain leakage is provided along the lower end of the outdoor staircase 17, the outdoor staircase 17 becomes invisible from the side below the staircase space 19a. In this structure, when the structure of the outdoor staircase 6 shown in FIG. 13 is adopted instead of the outdoor staircase 17, the nuts 8a and 9a of the outdoor staircase 6 cannot be operated from below the outdoor staircase 6. Cannot be disassembled. As a result, the structure of the outdoor staircase 6 shown in FIG.
[0009]
Therefore, for example, it is conceivable to adopt an outdoor staircase 20 as shown in FIG. This outdoor staircase 20 is provided with a bracket 22 projecting downward and a bracket 23 projecting upward at the lower front part and lower rear part of the step board 21, respectively. The bracket 22 provided and the bracket 23 provided on the lower step plate 20 are fixed with screws 25 and 26, respectively. In the structure of the outdoor staircase 20, the screws 25 and 26 can be operated from the front side of the outdoor staircase 20, but since the screws 25 and 26 are visible from the front side, there is a problem that appearance is impaired.
[0010]
A first object of the present invention is to provide a building with an outdoor staircase that can prevent rain leakage from the outdoor staircase to the space below the staircase when it rains with a simple configuration.
[0011]
A second object of the present invention is to provide a staircase board mounting structure for staircases that can be disassembled and assembled from above for maintenance and the like even if the staircase structure is not visible from below. is there.
[0012]
[Means for Solving the Problems]
In order to achieve the first object, the present invention provides a building with an outdoor staircase in which an outdoor staircase is attached to a building structure, and a lower part of the outdoor staircase is a part of a living room space. It is set as the building with the outdoor staircase in which the waterproof layer is provided along the side and lower part of this.
[0013]
According to this configuration, even if rainwater leaks downward from the outdoor staircase, the rainwater is prevented from leaking into the lower space by the waterproof layer.
[0014]
Further, the prior SL outdoor stairs has sasara digits to support a number of stair treads, the waterproof layer comprises a waterproof member that is disposed along the lower and outer surface of the sasara digits of the outdoor stairs, the waterproof The upper ends of both sides of the member are fixed to the upper ends of the spar.
[0015]
According to this configuration, when the outdoor staircase is assembled, the waterproof member that is a waterproof layer can be easily assembled to the outdoor staircase.
[0016]
Furthermore, before Symbol by brackets for stair mounted fixed with bolts passing through the sides of the waterproof member to the outer surface of the sasara digit holds the waterproof member between said sasara digits and the bracket, the bracket It attaches to the said building structure, It is characterized by the above-mentioned.
[0017]
According to this configuration, the through hole through which the bolt for attaching the bracket for mounting the staircase to the spar is formed in the waterproof member, but the waterproof member is sandwiched between the spar and the bracket. It is possible to prevent rainwater from leaking from the through hole.
[0018]
The front Symbol waterproof member, said comprising a waterproof plate that is disposed along the lower and outer surface of the sasara digits outdoor stairs, a waterproof sheet which is disposed along the outer surface of the waterproof plate, wherein the bolt A through-hole penetrating therethrough is provided in the waterproof plate, and a seal member extending along the periphery of the through-hole is interposed between the waterproof plate and the spar.
[0019]
According to this structure, the waterproofing in the part of the through-hole provided in the waterproof board can be performed more reliably.
[0020]
The building with an outdoor staircase is a unit building in which a plurality of building units are arranged adjacent to each other. According to this configuration, when the outdoor staircase is assembled to one of the building units at the factory, the waterproof member that is a waterproof layer can be easily assembled to the outdoor staircase in advance. Moreover, at a construction site where building units are assembled together, a building with a waterproof member can be constructed simply by combining a building unit with an outdoor staircase with another building unit, so a waterproof member that is a waterproof layer on the outdoor staircase of the building unit There is no need to assemble the building, and building is easy.
[0021]
Furthermore, in order to achieve the second object described above, the outdoor stairs, and left and right sasara digits to be tilted, the number of stages plate that is cathodic at a constant pitch in the vertical between the sasara digit the step plate provided with a riser plate for closing between the upper and lower ends of the riser plates are detachably attached to the stage plate, stage plate fixed to disposed to and the sasara digits under the stage plate A support plate is provided, a locking hook protruding downward is integrally provided at a front edge portion of the step plate support plate, a bolt protruding from the lower surface of the step plate and penetrating through the step plate support plate and the bolt The step plate is detachably attached to the step plate support plate with a nut screwed to the lower end portion of the bolt, and the hook to be locked to the locking hook is the upper end portion of the solder plate. Provided integrally with the rear portion of the corrugated plate and the corrugated plate Characterized in that the holding plate portion which is held between the rear of the support plate is provided at the lower end of the riser plate.
[0022]
According to this structure, by providing a space under which the lowermost step plate can be removed below the lowermost step plate, by removing the step plate, the solder plate and the step plate can be sequentially removed from the lower one. Can do. Further, when assembling the corrugated board or the damaged board, it is possible to easily assemble the corrugated board or the damaged board by starting from the top. Moreover, since the attachment part of the soldering board assembled | attached between corrugated boards is not visible from the front side, appearance does not impair.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0024]
FIG. 1 shows a building with an outdoor staircase of a type that has three levels as a whole and uses the rooftop. The first level of this building has four rectangular parallelepiped building units 31 fixed in a 2 × 2 arrangement on a foundation (not shown), and the third level has a 2 × 2 arrangement on the first level. There are four fixed building blocks 32 for a room. Further, the third floor has three cuboid building units 33 stacked on these two floors and a building unit 34 with steps, and a balcony 35 is provided.
[0025]
The building unit with staircase 34 includes a box-shaped living room portion 36 and an outdoor staircase 37 provided outside the living room portion 36. And by using this outdoor staircase 37, it is possible to go up from the balcony 35 to the rooftop 38. In addition, a living room space 39 is formed in the living room portion 36 as shown in FIG. 2, and below the outdoor staircase 37 is a lower staircase space 39a continuous to the living room space 39 as shown in FIGS. Is formed.
[0026]
The outdoor staircase 37 is arranged between the right and left saddle beams 40 and 40 (see FIGS. 6A and 7) inclined as shown in FIGS. 4 and 5 and the saddle beams 40 and 40 as shown in FIGS. 5 and FIG. 8 (a), a plurality of step plates 41 arranged horizontally at equal pitches in the vertical direction, and upper and lower adjacent to each other as shown in FIG. 4, FIG. 5 and FIG. The step plate 41 is provided with a solder plate 42 for closing the space between the step plates 41.
[0027]
Further, step plate support plates 43 and 43 are respectively disposed below both side portions of each step plate 41 as shown in FIG. 6A (see FIG. 7). As shown in FIG. 6B, each of the step plate support plates 43 includes a side plate portion 44, a support plate portion 45 provided continuously with an upper edge portion of the side plate portion 44, and a front edge portion of the support plate portion 45. There is a locking hook 46 that is continuously provided (projected) downward and directed forward. As shown in FIGS. 6B and 9, a step 45 a having a thickness corresponding to the plate thickness is provided at the intermediate portion in the front-rear direction of the support plate 45. It is divided into a support plate part 45b and a rear lower support plate part 45c. Bolt insertion holes (through holes) 47 and 48 are formed in the upper support plate portion 45b and the lower support plate portion 45c, respectively.
[0028]
As shown in FIGS. 5 and 9, fixing bolts 49 and 50 projecting downward with a space in the front-rear direction are respectively planted and fixed on both sides of the step plate 41. The front portion of the step plate 41 is brought into contact with the upper support plate portion 45b as shown in FIG. 9, and the fixing bolt 49 of the step plate 4 passes through the bolt insertion hole 47 and protrudes downward. A nut 49a is screwed to the tip (lower end) of the fixing bolt 49, and the front portion of the step plate 41 is detachably fastened and fixed to the upper support plate 45b by the nut 49a. .
[0029]
A hooked hook 51 facing rearward is integrally provided at the upper end portion of the vertically extending wafer plate 42, and a holding plate portion 52 bent at the front side is integrally provided at the lower end portion of the damaged plate 42. ing. The hook 51 to be locked is locked to the locking hook 46, and the holding plate portion 52 is interposed between the rear portion of the step plate 41 and the rear portion of the step plate support plate 43. A bolt insertion hole (through hole) 53 is formed in the holding plate portion 52, and the fixing bolt 50 of the step plate 41 is protruded downward through the bolt insertion holes 52 and 48. Then, a nut 50a is screwed to the front end portion (lower end portion) of the fixing bolt 50, and the holding plate portion 51 of the solder plate 42 is connected to the rear portion of the step plate 41 and the lower support plate portion 45b by the nut 50a. It is fixed so as to be detachable.
[0030]
4 to 6A and 7, reference numeral 60 denotes a flat waterproof member (waterproof layer) along the side surface and the lower part of the outdoor staircase 37.
[0031]
The flat waterproof member (flat waterproof means) 60 includes a waterproof plate 61 formed in a U-shaped cross section from a bottom plate portion 61a and left and right side plate portions 61b and 61b. The waterproof plate 61 extends obliquely up and down, and the bottom plate portion 61 a and the side plate portions 61 b and 61 b are disposed along the lower portion of the outdoor staircase 37 and the outer surface of the spar 40. The flat waterproof member 60 includes a waterproof sheet 62 disposed along the outer surface of the waterproof plate 61. The waterproof plate 61 is a PVC steel plate having a U-shaped cross section, that is, a surface of a thin steel plate having a U-shaped cross section covered with a thin film layer of vinyl chloride. Further, a rubberized cloth is used for the waterproof sheet 62. Holding plates 62 that hold the upper edge portion of the waterproof sheet 62 in a straight line are integrally fixed to the left and right upper edge portions of the waterproof sheet 62, respectively. A bracket 63 is fixed to the outer surface of the upper edge of the spar 40 by welding, and a holding plate 62 and a side plate 61 b of the waterproof plate 61 are fixed to the bracket 63 with screws 64.
[0032]
Further, as shown in FIG. 8 (c), the longitudinal ends of the weir spar 40, that is, the upper end 40a and the lower end 40b of the weir 40 extending obliquely up and down are formed obliquely close to each other. A pair of through holes 65 are formed. A fixing bolt 66 is inserted into each through-hole 65 from the inside to the outside of the spar 40. The head portion 6 6 a of the bolt 66 is welded and fixed to the sheathing girder 40 and is subjected to a caulking process to ensure airtightness between the inner surface of the sheathing girder 40.
[0033]
Further, as shown in FIGS. 8B and 8C, the flat waterproof member 60 is formed with a rectangular through hole 67 through which the pair of fixing bolts 66 and 66 are inserted. Further, between the waterproof plate 61 and the spar 40, inner and outer double annular seal members S1, S2 extending along the through hole 67 are interposed. A double-sided adhesive type is used for the seal members S1 and S2. The sealing members S1 and S2 are hermetically bonded and fixed to the waterproof plate 61 and the spar 40 to seal the periphery of the through hole 67.
[0034]
A mounting bracket 68 is disposed on the side of the through hole 67. The mounting bracket 68 has a rectangular base plate 69 extending obliquely up and down along the through hole 67 and covering the through hole 67, and a channel-like extension extending up and down where the open end side of the upper end portion of the base plate 69 is fixed by welding. A bracket 70 is provided. The above-described fixing bolt 66 passes through the base plate 69, and a spacer 71 fitted on the outer periphery of the fixing bolt 66 is interposed between the base plate 69 and the spar 40. Moreover, a nut 66b is screwed to the tip of the fixing bolt 66. The base plate 69 is fixed to the sheathing plate 40 by tightening the nut 66b.
[0035]
And the lower end part of the bracket 70 is being fixed to the supporting member 72 of the frame (building structure) which is not shown of the building unit 34 with steps with the volt | bolts 73 and 73 and the nuts 74 and 74.
[0036]
A gypsum board 75 that is inclined along the lower surface of the flat waterproof member 60 is disposed below the flat waterproof member 60. This gypsum board 75 is attached to the building structure of the building unit 34 at a position not shown. A heat insulating material 76 is interposed between the gypsum board 75 and the flat waterproof member 60.
[0037]
Furthermore, a working space 80 into which a hand or the like can be inserted when disassembling the outdoor staircase 37 for maintenance or the like is formed between the lowermost step plate 41 and the lower end portion of the flat seal member 60.
[0038]
Next, the action of the outdoor staircase 37 in the building having such a configuration and the procedure for disassembling and assembling the outdoor staircase 37 for maintenance and the like will be described.
[0039]
According to this configuration, even if rainwater leaks downward from the outdoor staircase 37, the rainwater flows down to the balcony 35 along the bottom wall 61 a of the waterproof plate 61 constituting the waterproof layer 60. The drainage pipe (not shown) provided in 35 is drained, and rainwater is prevented from leaking into the lower staircase space 39 a below the outdoor staircase 37.
[0040]
At this time, even if rainwater enters between the sheathing girder 40 and the waterproof plate 61 and this intruding rainwater tries to flow toward the bolt 66 that attaches the mounting bracket 68 to the sheathing girder 40, the rainwater is sealed by the seal members S 1, S 2. Is prevented from flowing to the bolt 66 side. In addition, since the head portion 66a is subjected to caulking processing to ensure airtightness between the head portion 66a and the spar 40, rainwater flows along the inner surface of the slat 40, and this rainwater flows into the bolt 66. Even if it flows around the head 66a, rainwater is prevented from entering the seal member S1 through the through-hole 65 between the head 66a and the spar 40.
[0041]
Further, when it is necessary to disassemble or assemble the outdoor staircase 37 for maintenance or the like, a tool and a hand are put into the work space 80 and the nut 49a for fixing the lowermost step plate 41 is fixed. , 50a can be removed from the bolts 49, 50 with a tool, so that the lowermost step plate 41 can be removed from the step plate support plate 43. Then, when the step plate 41 is removed from the lowermost step plate support plate 43, the lower end portion of the solder plate 42 fixed to the lowermost step plate support plate 43 by the lower step plate 41 becomes free. . The nuts 49a and 50a for fixing the upper plate 41 are removed by removing the locked hook 51 of the loose plate 42 from the hook 46 provided on the upper plate support plate 43. Is exposed so that it can be seen from diagonally below. In this state, by removing the nuts 49a and 50a, the upper plate 41 can be removed.
[0042]
Therefore, by sequentially removing the step plate 41 and the damaged plate 42 one step higher in this manner, the many step plates 41 and the damaged plate 42 of the outdoor staircase 37 can be removed from the spar 40 to the uppermost step. Further, the step plate 41 and the damaged plate 42 removed in this way can be assembled to the spar 40 in reverse order from the top to the bottom.
[0043]
【The invention's effect】
As described above, the present invention is a building with an outdoor staircase in which an outdoor staircase is attached to a building structure, and a lower part of the outdoor staircase is a part of a living room space, and a side surface and a lower portion of the outdoor staircase. Therefore, even if rainwater leaks downward from the outdoor staircase, it is possible to prevent the rainwater from leaking into the space below by the waterproof layer having a simple structure.
[0044]
Further, the prior SL outdoor stairs has sasara digits to support a number of stair treads, the waterproof layer comprises a waterproof member that is disposed along the lower and outer surface of the sasara digits of the outdoor stairs, the waterproof Since the upper ends of both sides of the member are fixed to the upper ends of the spar girders, the waterproof member, which is a waterproof layer, can be easily assembled to the outdoor stairs when assembling the outdoor stairs.
[0045]
Furthermore, before Symbol by brackets for stair mounted fixed with bolts passing through the sides of the waterproof member to the outer surface of the sasara digit holds the waterproof member between said sasara digits and the bracket, the bracket Since it is configured to be attached to the building structure, a through-hole through which a bolt for attaching a bracket for stair mounting to the spar is formed in the waterproof member, but the waterproof member is sandwiched between the spar and the bracket. Therefore, it is possible to prevent leakage of rainwater from the through hole portion.
[0046]
The front Symbol waterproof member, said comprising a waterproof plate that is disposed along the lower and outer surface of the sasara digits outdoor stairs, a waterproof sheet which is disposed along the outer surface of the waterproof plate, wherein the bolt Since the through-hole which penetrates is provided in the said waterproof board, and it was set as the structure by which the sealing member extended along the circumference | surroundings of the said through-hole was interposed between the said waterproof board and the said spar, the waterproof board It is possible to perform waterproofing more reliably at the portion of the through-hole provided in.
[0047]
In addition , since the building with an outdoor staircase is a unit building in which a plurality of building units are arranged adjacent to each other, when the outdoor staircase is assembled to one of the building units at the factory, a waterproof member that is a waterproof layer is placed outdoors. It can be easily assembled on the stairs in advance. Moreover, at a construction site where building units are assembled together, a building with a waterproof member can be constructed simply by combining a building unit with an outdoor staircase with another building unit, so a waterproof member that is a waterproof layer on the outdoor staircase of the building unit There is no need to assemble the building, and building is easy.
[0048]
Further, outdoors stairs, with comprises left and right sasara digits to be tilted, the number of stages plate that is cathodic at a constant pitch in the vertical between the sasara digits, the riser plate for closing the stage plates, the upper and lower ends of the riser plates are detachably attached to the stage plate, stage plate support plate fixed to the arranged by and the sasara digits under the stage plate is provided, the stepped plate support plate A locking hook projecting downward is integrally provided at the front edge of the bolt, and a nut projecting from the lower surface of the step plate and penetrating through the step plate support plate and a nut screwed to the lower end of the bolt. The step plate is detachably mounted on the step plate support plate, and a hook to be locked to the lock hook is integrally provided at an upper end portion of the solder plate, and a rear portion of the step plate And the rear portion of the corrugated plate support plate Since the holding plate portion is provided at the lower end portion of the solder plate, by removing the step plate by providing a space under which the lower step plate can be removed. The solder plate and the step plate can be sequentially removed from the lower one.
Further, when assembling the corrugated board or the damaged board, it is possible to easily assemble the corrugated board or the damaged board by starting from the top. Furthermore, since the attachment part of the soldering board assembled | attached between corrugated boards is not visible from the front side, an appearance is not impaired.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a building with an outdoor staircase according to the present invention.
FIG. 2 is a schematic perspective view of a building with an outdoor staircase taken from another angle with a part of FIG. 1 taken out.
3 is a schematic longitudinal sectional view including a portion of an outdoor staircase in FIG. 1. FIG.
4 is a schematic perspective view showing a part of the outdoor staircase shown in FIGS. 1 to 3; FIG.
FIG. 5 is an explanatory diagram showing the outdoor staircases of FIGS. 1 to 5 as being stepped vertically from the center in the width direction;
6A is an explanatory view showing the outdoor staircase of FIGS. 1 to 5 in a section in the width direction at a portion of a mounting portion to a building, and FIG. 6B is a step plate support plate of FIG. FIG.
7 is a partially enlarged explanatory view of FIG. 6 (a). FIG.
8A is an explanatory view showing the relationship between the mounting bracket shown in FIG. 6A and FIG. 7 and an outdoor staircase, FIG. 8B is an enlarged explanatory view of the main part of FIG. 8A; (B) is an explanatory view of a portion excluding the mounting bracket (b).
FIG. 9 is an explanatory view showing a part of FIG.
10 is an exploded perspective view of the step board and the damaged board shown in FIG. 9. FIG.
FIG. 11 is a schematic perspective view showing an example of a conventional building with an outdoor staircase.
12 is a cross-sectional view of a principal part showing a structural example of the outdoor staircase shown in FIG. 11. FIG.
FIG. 13 is a schematic perspective view showing another example of a conventional building with outdoor stairs.
14 is a schematic perspective view of a building with an outdoor staircase taken from another angle with a part of FIG. 13 taken out.
15 is a schematic longitudinal sectional view including a portion of the outdoor staircase of FIG.
16 is a cross-sectional view of an essential part showing a structural example of an outdoor staircase shown in FIG.
[Explanation of symbols]
37 ... Outdoor staircase 40 ... Sasara girder 41 ... Step plate 42 ... Kokemi plate 43 ... Step plate support plate 46 ... Locking hooks 49, 50 ... Bolts 49a, 50a ..Nut 51 ... Locked hook 52 ... Holding plate part 60 ... Flat waterproof member (waterproof layer)
61 ... Waterproof board 62 ... Waterproof sheet 66 ... Bolt 67 ... Through hole 68 ... Mounting bracket S1, S2 ... Seal member

Claims (5)

An outdoor staircase provided with a waterproof layer along a side surface and a lower part is attached to a building structure, and a building with an outdoor staircase in which a lower part of the outdoor staircase is a part of a living room space,
The outdoor staircase has a cage girder that supports a number of step plates, and the waterproof layer has a waterproof member disposed along a lower part of the outdoor staircase and an outer surface of the sagittal girder, and both sides of the waterproof member. The building with an outdoor staircase, characterized in that the upper end of the part is fixed to the upper end of the sasara girder . A bracket for stair mounting is fixed to an outer surface of the sheathing girder with a bolt that penetrates a side portion of the waterproofing member, and the waterproofing member is held between the sheathing girder and the bracket, and the bracket is attached to the building structure. The building with an outdoor staircase according to claim 1, wherein the building is attached to a body. The waterproof member includes a waterproof plate disposed along a lower part of the outdoor staircase and an outer surface of the spar and a waterproof sheet disposed along an outer surface of the waterproof plate, and the bolt penetrates through the waterproof member. The hole according to claim 2, wherein a hole is provided in the waterproof plate, and a sealing member extending along the periphery of the through hole is interposed between the waterproof plate and the spar . Building with outdoor stairs. Outdoor stairs with building according to any one of claims 1 to 3, wherein the outdoor stairs with building a unit building composed disposed adjacent a plurality of building units. The outdoor staircase includes left and right swaying girders that are inclined, a plurality of step boards that are spanned at equal pitches between the sewage girders, and a kegomi board that closes the step boards, and the kegomi The upper and lower ends of the plate are detachably attached to the corrugated plate ,
A corrugated plate support plate disposed under the corrugated plate and fixed to the sheathing girder,
A locking hook that protrudes downward is integrally provided at the front edge of the step plate support plate, protrudes from the lower surface of the step plate and passes through the step plate support plate, and is screwed to the lower end of the bolt. The corrugated plate is detachably attached to the corrugated plate support plate with a nut attached, and a hook to be locked to be locked to the locking hook is integrally provided at the upper end portion of the solder plate, The holding plate part clamped between the rear part of the said corrugated board and the rear part of the said corrugated board support plate is provided in the lower end part of the said soldering board, The any one of Claims 1-4 characterized by the above-mentioned. Building with outdoor staircase .

Images