JP2020041311A - Staircase structure and unit building - Google Patents

Abstract

To provide a staircase structure which can fix iron stairs to a parting wall and a unit building.SOLUTION: It is a staircase structure in which iron stairs (round staircase 51) are adjacent to a parting wall 70. In this staircase structure, the parting wall 70 has between a fire-resistant board (gypsum board 73) and another fire-resistant board (gypsum board 73) frame members 71 of noncombustible material and horizontal members 72 of noncombustible material laid on the frame members 71. The iron stairs (round staircase 51) are fixed on the horizontal members 72 of noncombustible material laid on the frame members 71.SELECTED DRAWING: Figure 12

Description

  TECHNICAL FIELD The present invention relates to a staircase structure and a unit building in which an iron staircase is adjacent to a boundary wall.

  2. Description of the Related Art Conventionally, an iron staircase structure has been known (for example, see Patent Document 1). Patent Literature 1 discloses a configuration in which a stair portion formed of an iron construction member is fixed to a wall.

JP-A-5-31835

  However, the staircase structure described in Patent Literature 1 is a structure in which a staircase is fixed to a wall using bolts and nuts so as to penetrate the wall. Therefore, the staircase structure described in Patent Document 1 has a problem that the stairs cannot be fixed to the boundary wall.

  Therefore, an object of the present invention is to provide a stair structure and a unit building capable of fixing an iron stair to a boundary wall.

  In order to achieve the above object, a staircase structure according to the present invention is a staircase structure in which an iron staircase is adjacent to a boundary wall, wherein the boundary wall is provided between a fireproof board and a fireproof board, and a nonflammable frame material. And a transverse member made of a non-combustible material suspended on the frame member, wherein the stairs are fixed to the transverse member.

  Here, in the staircase structure of the present invention, the staircase may be fixed to the horizontal member by dry connection.

  In the staircase structure of the present invention, the stairs may include a tread plate and a slab, and the tread plate may be fixed to the horizontal member via the slab.

  In the staircase structure of the present invention, the stairs forming one layer may be formed from a plurality of sub-staircase units. Furthermore, the unit building of the present invention may be provided with the above-mentioned staircase structure.

  In the staircase structure of the present invention configured as described above, the iron staircase is a staircase structure adjacent to the boundary wall, and the boundary wall includes a nonflammable frame material between the fireproof board and the fireproof board. And a horizontal member made of a non-combustible material that is mounted on the frame member, and the stairs are fixed to the horizontal member. Therefore, the stairs can be attached to the horizontal member of the boundary wall without penetrating the boundary wall.

  Further, in the staircase structure of the present invention, the staircase is fixed to the horizontal member by dry connection, so that the weight can be reduced as compared with the case of welding.

  In the staircase structure of the present invention, the staircase includes a tread plate and a slab, and the tread is fixed to the horizontal member via the slab, thereby reducing the weight as compared with the case of welding. be able to.

  Further, in the staircase structure of the present invention, the stairs forming one level are formed from a plurality of sub-stair units, so that the sub-stair units divided into small sizes can be attached to the boundary wall. Mounting workability can be improved.

  With the configuration described above, it is possible to provide a unit building exhibiting the effects of the above-described staircase structure of the present invention.

FIG. 2 is a configuration diagram illustrating a configuration of a unit building according to the first embodiment. FIG. 2 is an explanatory diagram illustrating a configuration of a unit building according to the first embodiment. FIG. 2 is an exploded perspective view illustrating a configuration of a unit building according to the first exemplary embodiment. FIG. 3 is a perspective view illustrating a configuration of a building unit on the lowest floor according to the first embodiment. It is a perspective view which shows the structure of the building unit of the upper floor of Example 1. FIG. 2 is a perspective view illustrating a configuration of a building unit on the top floor according to the first embodiment. FIG. 2 is a perspective view illustrating a configuration of a stair unit according to the first embodiment. FIG. 3 is a plan view illustrating a configuration of a staircase unit according to the first embodiment. FIG. 2 is a perspective view illustrating a configuration of a boundary wall according to the first embodiment. FIG. 3 is a cross-sectional view illustrating a configuration of a boundary wall according to the first embodiment. It is sectional drawing which shows the attachment structure to the center wall of the stairs of Example 1. It is sectional drawing which shows the attachment structure to the boundary wall of the staircase of Example 1. It is sectional drawing which shows the attachment structure to the partition wall of the stairs of Example 1. FIG. 14A is a perspective view illustrating a configuration of a jig of the stair unit according to the first embodiment. FIG. 14A illustrates a first sub-stair unit, FIG. 14B illustrates a second sub-stair unit, and FIG. c) shows a third sub-staircase unit. FIG. 3 is a cross-sectional view illustrating a configuration of a jig of the staircase unit according to the first embodiment. FIG. 3 is an explanatory diagram illustrating an assembly procedure of the unit building according to the first embodiment. FIG. 3 is an explanatory diagram illustrating an assembly procedure of the unit building according to the first embodiment. FIG. 3 is an explanatory diagram illustrating an assembly procedure of the unit building according to the first embodiment. FIG. 3 is an explanatory diagram illustrating an assembly procedure of the unit building according to the first embodiment.

  Hereinafter, an embodiment that realizes a staircase structure and a unit building according to the present disclosure will be described based on Example 1 illustrated in the drawings.

  First, the configuration will be described. The staircase structure and the unit building according to the first embodiment are applied to a unit building of an apartment house having a staircase structure connecting floors of respective floors of a three-story building including a lowest floor, an upper floor, and a top floor.

[Composition of unit building]
FIG. 1 is a configuration diagram illustrating a configuration of a unit building according to the first embodiment. FIG. 2 is an explanatory diagram illustrating the configuration of the unit building according to the first embodiment. FIG. 3 is an exploded perspective view illustrating the configuration of the unit building according to the first embodiment. Hereinafter, the configuration of the unit building of the first embodiment will be described with reference to FIGS.

  In the unit building 1, as shown in FIG. 1, the lowest floor building unit 10 is installed on the foundation 2, the upper floor building unit 110 is installed on the lowest floor building unit 10, and the upper floor The building unit 210 on the top floor is installed on the building unit 110 of the first floor. Above the building unit 210 on the top floor, the roof panel 3 is arranged.

  As shown in FIGS. 1 and 2, the unit building 1 includes a first dwelling unit H1 where a certain household lives, a second dwelling unit H2 where another household lives, and a third dwelling unit H3 where another household lives. It is a multi-family housing consisting of a fourth dwelling unit H4 in which another household lives.

  As shown in FIG. 3, a staircase unit 50 on the lowest floor is arranged inside the building unit 10 on the lowest floor, and a staircase unit 50 on the upper floor is arranged inside the building unit 110 on the upper floor. You.

[Configuration of building unit]
FIG. 4 is a perspective view illustrating a configuration of a building unit on the lowest floor according to the first embodiment. FIG. 5 is a perspective view illustrating the configuration of the building unit on the upper floor according to the first embodiment. FIG. 6 is a perspective view illustrating the configuration of the building unit on the top floor according to the first embodiment. Hereinafter, a configuration of the building unit of the first embodiment will be described with reference to FIGS. Note that, for the sake of simplicity, the description of the outer wall will be omitted.

  The building unit 10 on the lowest floor, the building unit 110 on the upper floor, and the building unit 210 on the top floor are all connected to the columns 11 made of four square steel pipes and the lower ends of these columns 11. There is provided a framed structure having a floor girder 12 made of four channel steels and a ceiling girder 13 made of four channel steels connected between upper ends of the columns 11.

(Building unit on the lowest floor)
As shown in FIG. 4, a plurality of floor beams 14 made of rectangular steel pipes are bridged at substantially equal intervals between the floor girders 12 on the long sides facing each other in the building unit 10 on the lowest floor. A floor plate 15 is mounted on these floor beams 14. The upper surface of the floor plate 15 forms a floor. The load of the floor plate 15 and the load applied to the floor plate 15 are transmitted from the small floor beam 14 and the large floor beam 12 to the foundation 2.

  A plurality of ceiling beams 16 made of channel steel are bridged substantially in parallel between the ceiling beams 13 on the long sides of the building units 10 on the lowest floor. A ceiling plate 17 is attached to the lower surfaces of these ceiling beams 16. The ceiling plate 17 of the lowest floor building unit 10 is opened so as to have a stairwell on the stairs.

  In the building unit 10 on the lowest floor, the ceiling beam 16 is not provided at the position inside the ceiling girders 13 where the stair unit 50 on the lowest floor is installed. A first ceiling auxiliary beam 21 and a second ceiling auxiliary beam 22 made of channel steel are provided.

(Upper floor building unit)
As shown in FIG. 5, a plurality of floor beams 14 made of a square steel pipe are bridged at substantially equal intervals between the floor girders 12 on the long sides facing each other in the building unit 110 on the upper floor. On these floor beams 14, a floor plate 115 is attached. The upper surface of the floorboard 115 constitutes a floor. The floor panel 115 of the building unit 110 on the upper floor is opened so as to have a stairwell on the stairs. The load on the floor plate 115 and the load applied to the floor plate 115 are transmitted from the small floor beam 14 and the large floor beam 12 to the foundation 2 via the lower floor pillar 11.

  A plurality of ceiling beams 16 made of channel steel are bridged substantially in parallel between the ceiling beams 13 on the long sides facing the building unit 110 on the upper floor. A ceiling plate 17 is attached to the lower surfaces of these ceiling beams 16. The ceiling plate 17 of the building unit 110 on the upper floor is opened so as to have a stairwell on the stairs.

  In the building unit 110 on the upper floor, the first floor support made of a square steel pipe is not provided on the inside of the floor girders 12 and at the position where the stair unit 50 on the upper floor is installed. A beam 31 and a second floor auxiliary beam 32 made of a square steel pipe are provided.

  In the building unit 110 on the upper floor, the ceiling beam 16 is not provided at the position where the stair unit 50 on the upper floor is installed inside the ceiling beam 13, and the building unit 10 on the lower floor is Similarly, a first ceiling auxiliary beam 21 and a second ceiling auxiliary beam 22 made of channel steel are provided.

(Building unit on the top floor)
As shown in FIG. 6, a plurality of floor beams 14 made of rectangular steel pipes are bridged at substantially equal intervals between the floor girders 12 on the long sides facing each other of the building unit 210 on the top floor. On these floor beams 14, a floor plate 115 is attached. The upper surface of the floorboard 115 constitutes a floor. The floor panel 115 of the building unit 210 on the top floor is opened so as to have a stairwell on the stairs. The load of the floor board 115 and the load applied to the floor board 115 are transmitted from the small floor beam 14 and the large floor beam 12 to the foundation 2 via the pillar 11 on the upper floor and the pillar 11 on the lowest floor.

  A plurality of ceiling small beams 16 made of channel steel are bridged substantially in parallel between the ceiling large beams 13 on the long sides facing the building unit 210 on the top floor. A ceiling plate 117 is attached to the lower surfaces of these ceiling beams 16.

  In the building unit 210 on the top floor, the floor beam 14 is not provided in the position inside the floor girders 12 where the stair unit 50 on the upper floor is installed, similar to the building unit 110 on the upper floor. In addition, a first floor auxiliary beam 31 and a second floor auxiliary beam 32 made of a square steel pipe are provided.

[Structure of stair unit]
FIG. 7 is a perspective view illustrating the configuration of the staircase unit according to the first embodiment. FIG. 8 is a plan view illustrating the configuration of the staircase unit according to the first embodiment. FIG. 9 is a perspective view illustrating the configuration of the boundary wall according to the first embodiment. FIG. 10 is a cross-sectional view illustrating the configuration of the boundary wall according to the first embodiment. FIG. 11 is a cross-sectional view illustrating a structure for attaching the stairs to the central wall according to the first embodiment. FIG. 12 is a cross-sectional view illustrating the structure for attaching the stairs to the boundary wall according to the first embodiment. Hereinafter, the configuration of the staircase unit according to the first embodiment will be described with reference to FIGS. 7 to 12. Since the staircase unit on the lowest floor and the staircase unit on the upper floor have the same configuration, the staircase unit on the lowest floor will be described, and the description on the staircase unit on the upper floor will be omitted.

  As shown in FIGS. 7 and 8, the stair unit 50 includes a central wall 60 disposed in the center of the stair unit 50, a turning stair 51 installed so as to surround the outside of the center wall 60, and a turning stair 51. It is composed of a boundary wall 70 and a partition wall 80 installed on the outer periphery.

(Central wall configuration)
The central wall 60 is formed in a rectangular panel shape by attaching a wall material 62 made of two gypsum boards or the like to a frame material 61 made of channel steel formed in a frame shape. Inside the frame member 61, there are a plurality of inner support members 63 made of channel steel for supporting the turning steps 51.

(Structure of the surrounding stairs)
The turning staircase 51 includes a plurality of treads 52, a plurality of risers 53, and a plurality of swashplates 55 as support means disposed at both ends of the riser 53.

  The tread plate 52 is formed of a plate material, and an iron back plate 52a is attached to the back surface. The riser 53 is formed of an iron plate. The riser plate 53 is attached to the tread plate 52 with an attachment such as a nail.

  Each rust plate 55 is made of an iron plate material, and as shown in FIGS. 7 and 15, has a square shape including a base 55 a and overhangs 55 b extending vertically from both ends of the base 55 a and the base 55 a. It is formed in a U-shape (cono-shape). Sasara plates 55 are arranged at both ends in the width direction of tread plate 52, and support tread plate 52 from below.

  As shown in FIG. 8, the turning staircase 51 is formed in a G-shape by changing its direction by 270 degrees so as to surround the outside of the central wall 60, and is configured to be accessible from the floor of the lowest floor to the floor of the upper floor. Is done.

  The end on the inner circumferential side in the width direction of the turning staircase 51 is supported by the central wall 60 via the swash plate 55. The end on the outer peripheral side in the width direction of the round staircase 51 is supported by the boundary wall 70 via the sara plate 55.

(Composition of the wall)
As shown in FIGS. 9 and 10, the boundary wall 70 includes a frame member 71 formed in a frame shape, a horizontal member 72 laid on the frame member 71, and a fireproof board attached to the frame member 71. A fireproof structure composed of a gypsum board 73 and a heat insulating material 75 is used. A plurality of boundary walls 70 are provided so as to surround the outer periphery of the turning staircase 51.

  The frame member 71 is formed in a substantially rectangular frame shape in a front view by channel steel. The horizontal member 72 is formed of channel steel and is horizontally mounted on the frame member 71. The horizontal member 72 is provided corresponding to the position where the tread plate 52 and the riser plate 53 are attached.

  The gypsum board 73 is provided so as to overlap the frame material 71. When the boundary wall 70 is provided between the building units, the gypsum board 73 is provided on the frame member 71 on the indoor side of the boundary wall 70. The heat insulating material 75 is, for example, glass wool, and is provided between the gypsum boards 73. That is, on both surfaces of the boundary wall 70, two gypsum boards 73 are provided.

(Configuration of partition wall)
As shown in FIG. 13, the partition wall 80 is formed in a rectangular panel shape by attaching a wall member 82 made of a single gypsum board or the like to a frame member 81 made of a channel steel formed in a frame shape. You. Inside the frame member 81, there are a plurality of horizontal members 83 made of channel steel for supporting the turning steps 51.

(Mounting structure to the center wall of the surrounding stairs)
As shown in FIG. 11, the tread plate 52 of the turning stairs 51 is attached to the central wall 60 via a slab 55 by dry connection. The tread plate 52 is placed on the projecting portion 55b of the sara plate 55. A plurality of portions of the tread plate 52 placed on the overhang portion 55b are fixed by screws S. The base portion 55a of the sara plate 55 is fixed to the inner support member 63 via the wall member 62 of the central wall 60 by a plurality of screws S. That is, the tread plate 52 is attached to the sarsla plate 55 by dry connection. Also. Sasara plate 55 is fixed to central wall 60 by dry connection.

(Mounting structure of the surrounding stairs on the wall)
As shown in FIG. 12, the tread plate 52 of the round staircase 51 is attached to the horizontal member 72 of the boundary wall 70 by dry connection via the slab 55. The tread plate 52 is placed on the overhang 55b of the slab 55. The tread plate 52 placed on the overhang portion 55b is fixed by a plurality of screws S.

  The base 55a of the sara plate 55 is fixed to the horizontal member 72 by a plurality of screws S via the gypsum board 73 of the boundary wall 70. That is, the sara plate 55 is fixed to the boundary wall 70 by dry connection. As a result, the rust plate 55 is attached to the boundary wall 70 without penetrating the boundary wall 70, and supports the outer peripheral side of the turning staircase 51.

(Mounting structure to the partition wall around the stairs)
As shown in FIG. 13, the tread plate 52 of the surrounding staircase 51 is attached to the horizontal member 83 of the partition wall 80 via the slab 55 by dry connection. The tread plate 52 is fixed to the rust plate 55 by a plurality of screws S. The base 55a of the sara plate 55 is fixed to the horizontal member 83 via the wall member 82 of the partition wall 80 by a plurality of screws S.

  The boundary wall 70 and the partition wall 80 of the building unit 10 on the lowest floor are placed on the floor plate 15 of the building unit 10 on the lowest floor. That is, the boundary wall 70 and the partition wall 80 are supported by the floor plate 15 of the floor where the boundary wall 70 and the partition wall 80 are arranged.

[Structure of stair unit jig]
FIG. 14 is a perspective view illustrating a configuration of a jig of the stair unit according to the first embodiment. FIG. 14A illustrates a first sub-stair unit, and FIG. 14B illustrates a second sub-stair unit. FIG. 14C shows a third sub-staircase unit. FIG. 15 is a cross-sectional view illustrating the configuration of the jig of the staircase unit according to the first embodiment. Hereinafter, the configuration of the jig of the staircase unit according to the first embodiment will be described with reference to FIGS. 14 and 15. Since the jig of the stair unit 50 on the lowest floor and the jig of the stair unit 50 on the upper floor have the same configuration, the jig of the stair unit 50 on the lowest floor will be described. Description of the jig is omitted.

  The jig 85 is used in a process of attaching the tread plate 52, the riser plate 53, and the sara plate 55 to the boundary wall 70.

  The jig 85 has a first jig 85a, a second jig 85b, and a third jig 85c. As shown in FIG. 14A, the first jig 85a supports three treads 52, three risers 53, and two outer plates 55 on the outer peripheral side, and the first jig 85a as a sub-stair unit. The sub-stair unit 50a is configured. As shown in FIG. 14 (b), the second jig 85b supports the two tread plates 52, the two riser plates 53, and the one outer plate 55 on the outer peripheral side to form the second jig 85b as a sub-stair unit. The sub-stair unit 50b is configured. As shown in FIG. 14C, the third jig 85c supports the two outer plates 55 on the outer peripheral side to form a third sub-step unit 50c as a sub-step unit.

  The jig 85 is formed of a plurality of square steel pipes, as shown in FIG. The jig 85 supports the lower projecting portion 55b of the rust plate 55 from below.

  A plurality of mounting holes 86 are formed on the upper surface of the jig 85 that comes into contact with the lower overhang portion 55b of the rust plate 55. A plurality of mounting holes 55c are formed in the overhanging portion 55b on the lower side of the sara plate 55 in correspondence with the mounting holes 86 of the jig 85.

  The bolt B is inserted into the mounting hole 86 of the jig 85 via the mounting hole 55c of the Sarasoh plate 55, whereby the Sarasoh plate 55 is temporarily fixed to the jig 85. The mounting hole 55c of the salar plate 55 and the mounting hole 86 of the jig 85 are formed sufficiently larger than the diameter of the bolt B, and are detachable from the mounting hole 55c of the Sarassa plate 55 and the mounting hole 86 of the jig 85. Thus, the operator can easily remove the jig 85 from the stair unit 50.

[Assembly procedure of unit building]
FIG. 16 to FIG. 19 are explanatory diagrams illustrating the procedure for assembling the unit building according to the first embodiment. Hereinafter, a procedure for assembling the unit building according to the first embodiment will be described with reference to FIGS.

(Wall mounting process)
In the wall mounting step, one boundary wall 70 and one partition wall 80 are mounted on the lowest building unit 10 as shown in FIG.

(Sub stair unit installation process)
In the sub-stair unit setting step, as shown in FIG. 17, the first sub-stair unit 50a, the second sub-stair unit 50b, and the third sub-stair unit 50c are installed in the building unit 10 on the lowest floor. . At this time, the sasara plate 55 provided in the first sub-stair unit 50a, the second sub-stair unit 50b, and the third sub-stair unit 50c is attached to the boundary wall 70 with screws S. Further, in the sub-stair unit installation step, the other plurality of rust plates 55 are attached to the boundary wall 70 with screws S.

(Center wall mounting process)
In the center wall attaching step, as shown in FIG. 18, the center wall 60 is installed on the building unit 10 on the lowest floor. In the center wall mounting step, the plurality of treads 52 and the riser 53 are placed on the slab 55 attached to the boundary wall 70 and fixed with screws S.

(Jig removal process)
In the jig removal step, as shown in FIG. 19, the first jig 85a, the second jig 85b, and the third jig 85c are removed from the building unit 10 on the lowest floor. Next, in the jig removal step, the remaining boundary wall 70 is attached to the lowermost building unit 10.

  Similarly, the building unit 110 on the upper floor is assembled through a wall mounting step, a sub-stair unit setting step, a center wall mounting step, and a jig removing step.

(Building unit installation process)
In the building unit installation step, as shown in FIG. 1, a building unit 10 on the lowest floor is installed on the foundation 2. The building unit 110 on the upper floor is installed on the building unit 10 on the lowest floor. The building unit 210 on the top floor is installed on the building unit 110 on the upper floor.
The roof panel 3 is installed on the building unit 210 on the top floor.

  Thus, the unit building 1 is assembled through the wall mounting step, the sub-stair unit setting step, the center wall mounting step, the jig removing step, and the building unit setting step.

  Next, the operation of the staircase structure and the unit building according to the first embodiment will be described. The staircase structure according to the first embodiment is a staircase structure in which an iron staircase (circular staircase 51) is adjacent to the boundary wall 70. In this staircase structure, the boundary wall 70 is formed between the fireproof board (gypsum board 73) and the fireproof board (gypsum board 73), and the frame 71 of the noncombustible material and the side of the noncombustible material laid across the frame 71. And a frame member 72, and the stairs (the surrounding steps 51) are fixed to the horizontal frame member 72 (FIG. 8).

  Thereby, the stairs (circular stairs 51) can be attached to the horizontal member 72 of the boundary wall 70 without penetrating the boundary wall 70. Therefore, the stairs (circular stairs 51) can be attached to the boundary wall 70 while maintaining the fire protection and the sound insulation of the boundary wall 70. In addition, since the stairs (circular stairs 51) can be attached to the boundary wall 70, a flexible design can be accommodated. Moreover, since the iron stairs (circular stairs 51) are attached to the non-combustible horizontal member 72 attached to the non-combustible frame 71, the fire resistance can be improved. Therefore, it is possible to secure an evacuation route in the event of a fire.

  In the staircase structure of the first embodiment, the staircase is fixed to the horizontal member by dry connection (FIG. 12).

  Thereby, the stairs (circular stairs 51) can be fixed to the horizontal member 72 by dry connection. Therefore, the weight can be reduced as compared with the case of welding. Further, the stairs (circular stairs 51) can be attached to the boundary wall 70 without performing a complicated welding operation. Therefore, it is possible to reduce the construction time and cost.

  In the staircase structure according to the first embodiment, the staircase includes the treadboard 52 and the slab 55, and the tread 52 is fixed to the horizontal member 72 via the slab 55 (FIG. 12).

  Thereby, the stairs (circular stairs 51) can be fixed to the horizontal member 72 by dry connection. Therefore, the weight can be reduced as compared with the case of welding.

  In the staircase structure according to the first embodiment, the stairs (turning stairs 51) that constitute one layer include a plurality of sub-stair units (first sub-stair unit 50a, second sub-stair unit 50b, and third sub-stair unit 50c). It is formed (FIG. 14).

  Thus, the sub-step units (the first sub-step unit 50a, the second sub-step unit 50b, and the third sub-step unit 50c) divided into small sizes can be attached to the boundary wall 70. Therefore, the mounting workability can be improved. In particular, when the stairs (circular stairs 51) are fixed to the boundary wall 70 by dry connection, the mounting workability is improved.

  The unit building 1 of the first embodiment has the above-mentioned staircase structure (FIGS. 1 and 2). Thus, for example, a unit building having a degree of freedom corresponding to an apartment house can be designed.

  The staircase structure and the unit building of the present disclosure have been described based on the first embodiment. However, the specific configuration is not limited to this embodiment, and changes and additions of the design are permitted without departing from the gist of the invention according to each claim of the claims.

  In the first embodiment, the example in which the outer peripheral wall of the round staircase is the boundary wall has been described. However, a part of the outer peripheral wall may be a boundary wall. That is, the turning stairs may be at least partially adjacent to the boundary wall.

  In the first embodiment, an example in which the stairs are turned into stairs is described. However, the stairs may be straight stairs, folded stairs, bent stairs, or the like.

  In the first embodiment, an example in which the present invention is applied to a three-story unit building is shown. However, the present invention can be applied to a two-story building or a four-story or more building.

  In the first embodiment, an example in which the present invention is applied to a unit building has been described. However, the present invention is also applicable to buildings having a general steel structure, buildings of a conventional construction method, and buildings of a two-by-four type.

1 unit building 50a 1st sub-staircase unit (example of sub-staircase unit)
50b Second sub-staircase unit (one example of sub-staircase unit)
50c 3rd sub-staircase unit (example of sub-staircase unit)
51 Around stairs (example of stairs)
52 Treadboard 55 Sasara board 70 Boundary wall 71 Frame material 72 Horizontal material 73 Gypsum board (an example of fireproof board)

Claims (5)

The iron staircase is a staircase structure adjacent to the boundary wall,
The boundary wall, between the fire-resistant board and the fire-resistant board, comprises a non-combustible material frame material, and a non-combustible material transverse material bridged over the frame material,
The staircase structure, wherein the staircase is fixed to the horizontal member. The staircase structure according to claim 1, wherein the staircase is fixed to the horizontal member by dry connection. The stairs include a tread and a slab,
3. The staircase structure according to claim 2, wherein the tread plate is fixed to the horizontal member via the sasara plate. 4. The staircase structure according to any one of claims 1 to 3, wherein the stairs forming one hierarchy are formed from a plurality of sub-staircase units. A unit building comprising the staircase structure according to any one of claims 1 to 4.