JP2022116808A - Substrate material for stairway and construction method for stairway - Google Patents

Abstract

To provide a substrate material for a stairway allowing construction of the stairway at an initial stage of building, satisfying a specification of a ministerial ordinance semi-fireproof construction while allowing an easy construction, and a construction method for the stairway.SOLUTION: Substrate materials for a stairway A1, A2, B1, B2, C1, C2, D1 and D2 installed between a cradle of a footboard of the stairway and a column member of a staircase comprise a plate member including noncombustible material and a batten provided along two opposite sides of one face of the plate member formed with a substantially U-shaped cross section and the batten projects outward from the two opposite sides.SELECTED DRAWING: Figure 1

Description

The present invention relates to a base material for stairs and a construction method for stairs.

Stairs installed in buildings such as houses play the role of a passage connecting the upper floor and the lower floor, but the installation of the stairs is usually performed after the construction of the wall materials for the staircase. , No stairs were installed in the early stages of construction. Therefore, it is necessary to install a temporary ladder for work and transport materials and move workers for construction work on the upper floors, etc. There was a problem of difficulty.

In order to solve the problem of installing a temporary ladder, for example, in Patent Document 1, after installing a staircase S as a substitute for a temporary ladder for various constructions after construction, this temporary ladder is fixed by fixing the makeup of the staircase S. An invention relating to a method of constructing a staircase in which the alternative staircase S is changed to the original staircase S' is disclosed, and installation and removal of a temporary ladder are unnecessary.

Similarly, Patent Documents 2 to 5 describe inventions related to so-called "temporary stairs" in which a base material (tread base) and a decorative material (tread board decorative material) are combined. The base) is used as the treads of temporary stairs for work, and after the necessary work is completed, the decorative materials (tread decorative materials) are fixed to complete the stairs.

In such a temporary staircase, the temporary staircase constructed with the base material as a tread can be used as a safe and comfortable work passage. It is advantageous in terms of labor saving that it is basically unnecessary to apply curing material for surface protection. In addition, it is known that overall work efficiency will be greatly improved when considering the damage caused by the lack of curing material, which is often seen on conventional stairs, and the necessary curing material removal and disposal after work is completed. there is

On the other hand, it is required to use fireproof materials for the walls of the staircase to prevent fire and delay the spread of fire. For example, in Patent Document 6, a joint member 50 made of a fireproof material is sandwiched between a building skeleton 90 and a stringer 12 to form a gap, and a plate-like fireproof plate material 60 made of a fireproof material is inserted into the gap. The invention relating to the staircase structure is described, and the joint member 50 and the fireproof plate material 60 continuously cover the walls of the staircase with the fireproof material.

JP-A-8-144461 Japanese Patent No. 4110340 Japanese Patent No. 4244263 Japanese Patent No. 5986385 Japanese Patent No. 5986383 JP-A-10-2080

By the way, there is a ministerial ordinance quasi-fireproof structure of the Japan Housing Finance Agency as a structure with fireproof performance corresponding to the quasi-fireproof structure stipulated by the Building Standards Act. The specifications dictate the use of plasterboard or side panels with a thickness of 30 mm or more as the wall substrate for staircases. In addition, the use of battens as covering members is specified just below the joints of these plasterboards or side panels.

In order to make the staircase a quasi-fire-resistant structure, it is conceivable to construct the stairs after installing noncombustible materials such as plasterboard on the entire wall of the staircase. Stairs cannot be used for work in the early stages of construction because they cannot be constructed.

On the other hand, when constructing the stairs before applying the noncombustible material such as plasterboard, a problem arises in the application of the noncombustible material in the post-process. That is, in order to construct the noncombustible material above and below the supporting members of the treads of the stairs that have already been constructed, it is necessary to cut the noncombustible material according to the shape of the upper and lower supporting members. If the support member is a straight side plate, it is easy to cut the noncombustible material linearly along the upper edge of the side plate. Also requires serrated cutting. Considering that it is very difficult to cut noncombustible materials such as plasterboard into a serrated shape, and that batting required for the specifications of the ministerial ordinance quasi-fireproof structure requires a similar serrated processing, In reality, it is almost impossible.

On the other hand, temporary staircases must be constructed as soon as possible so that they can be used as work passages as soon as possible. However, as described above, when constructing a temporary staircase before constructing a noncombustible material, plasterboard or the like as the noncombustible material requires extremely complicated processing, which is not realistic. On the other hand, when constructing a temporary staircase after constructing a noncombustible material, such complicated processing is not necessary, but it is necessary to precede the construction of the noncombustible material, and the work passage can be used early. However, the result is contrary to the purpose of improving the efficiency of construction work.

Furthermore, the fireproof structure in the invention described in Cited Document 6 has the following problems in order to comply with the ministerial ordinance quasi-fireproof structure of the Japan Housing Finance Agency. First, the joint member 50 is said to form a gap into which a plate-like fireproof plate material 60 (plasterboard) made of a fireproof material is inserted between the building frame 90 (column/stud) and the stringer 12 (cradle). If this gap is made large, it is easy to insert the fireproof plate material 60. However, the inserted part of the fireproof plate material 60 is sandwiched between the building frame 90 and the stringer 12, and cannot be fixed with a screw or the like. , gaps (gaps that must be avoided in ministerial ordinance fireproof structures) are likely to occur between the adjacent fireproof board 60 and between the building frame 90, which poses a serious problem in terms of fire prevention.

On the other hand, if the gap is made smaller, the fire prevention problem is somewhat reduced, but it is considered that it is difficult to insert the heavy and fragile plasterboard into the narrow gap in the first place. If the plasterboard warps even a little, it will get caught and cannot be inserted. In addition, regardless of the size of the gap, it is not possible to install a batten as a covering member on the back side of the plasterboard. In the first place, inserting plasterboard into the gap in this way is extremely difficult to comply with the specifications of the quasi-fireproof structure specified by the Ministry of Housing Finance Agency.

In addition, although Cited Document 6 does not indicate anything about the construction of the heat insulating material, it is necessary to construct the heat insulating material after constructing the joint member 50 and the stringer 12 (cradle) from the viewpoint of the structure. Seem. It seems that the glass wool, which is fluffy and has no elasticity, must be pushed into a narrow space with a stick or the like from above and below.

The present invention solves the above-mentioned conventional problems, enables stair construction at the initial stage of construction, satisfies the specifications of ministerial ordinance quasi-fireproof structure, and is easy to construct. It is intended to provide a construction method of. In particular, it is effective for a staircase that also serves as a work passage, such as a temporary staircase.

In order to solve the above problems, the stair base material of the present invention is a stair base material that is installed between a tread cradle of a staircase and a pillar member of a staircase, and includes a plate member made of a noncombustible material. and a batting member provided along two opposing sides of one side of the plate member to form a substantially U-shaped cross section, and the batting member protrudes outward from each of the two opposing sides. It is characterized by

Preferably, the width of the plate member in the height direction is equal to or greater than the width of the cradle in the height direction.

Further, preferably, the peripheral portion of the plate member is composed of five or less straight lines.

Preferably, the batting member is provided with a notch through which the column member is inserted.

Preferably, a heat insulating layer is provided between the batting members facing each other.

The stair construction method of the present invention is a stair construction method using the base material for stairs, wherein the base material for stairs is fixed along the installation position of the pedestal of the tread of the stairs, and the base material for stairs is fixed. The pedestal is fixed from the surface of the base material, and the treads of the stairs are fixed to the fixed pedestal.

Preferably, the area of the fixed plate member of the stair base material is equal to or larger than the area of the pedestal, and the fixed pedestal does not protrude from the plate member.

The stair base material of the present invention is a stair base material installed between a tread support of a staircase and a pillar member of a staircase. It is formed in a substantially U-shaped cross-section with batting members provided along two sides. By fixing the base material for stairs along the installation position of the pedestal of the tread of the stairs, a noncombustible layer can be provided between the pedestal and the column member. Then, by fixing the pedestal from the surface of the fixed base material for stairs and fixing the treads of the stairs to the fixed pedestal, the stairs can be constructed before the noncombustible material is applied to the entire wall of the staircase. Therefore, the stairs can be used for work in the early stages of construction. In particular, it is effective for a staircase that also serves as a work passage, such as a temporary staircase.

In addition, since the batten member protrudes toward the outside of each of the two opposing sides of the plate member, when the incombustible material is applied so as to be in contact with the top and bottom of the stair base material in a later process, the stair base material Since the batten member is positioned directly under the joint between the plate member and the incombustible material, there is no need to attach the batten again, and construction is easy. In addition, since the incombustible material can be cut along the upper and lower shapes of the base material for stairs, there is no need to cut it in a sawtooth shape to match the pedestal, and construction is easy. In addition, by providing an incombustible layer and arranging batten members, it is possible to meet the specifications of the ministerial ordinance quasi-fireproof structure.

Also, if the width in the height direction of the plate member is greater than the width in the height direction of the pedestal, when noncombustible materials are applied above and below the base material for stairs in the post-process, the incombustible material will not adhere to the pedestal. There is no contact, and construction is easy.

Further, when the peripheral portion of the plate member is composed of 5 or less straight lines, the plate member can be formed by cutting the incombustible material along the 5 or less straight lines, which makes the processing extremely easy.

Further, if the batting member has a notch through which the pillar member is inserted, the pillar member should be inserted through the notch so that the pillar member does not get in the way when fixing the base material for the stairs. can be done.

In addition, when a heat insulating layer is provided between batting members facing each other, it is possible to previously provide a heat insulating layer that is difficult to construct because it is blocked by a batting member, a pillar member, or the like.

Further, a method for constructing stairs according to the present invention is a method for constructing stairs using the base material for stairs. A noncombustible layer can be provided between the and the column member. Then, by fixing the pedestal from the surface of the fixed base material for stairs and fixing the treads of the stairs to the fixed pedestal, the stairs can be constructed before the noncombustible material is applied to the entire wall of the staircase. Therefore, the stairs can be used for work during the early stages of construction. In particular, it is effective for a staircase that also serves as a work passage, such as a temporary staircase.

In addition, if the area of the plate member of the fixed stair base material is larger than the area of the pedestal and the fixed pedestal does not protrude from the plate member, a noncombustible material will be added around the stair base material in the post-process. The incombustible material does not come into contact with the pedestal during construction, and the construction is easy.

Thus, according to the present invention, it is possible to construct stairs in the initial stage of construction, satisfy the specifications of the ministerial ordinance quasi-fireproof structure, and provide a base material for stairs and a construction method for stairs that are easy to construct. can do. In particular, it is effective for a staircase that also serves as a work passage, such as a temporary staircase.

It is a perspective view which shows the construction method of the stairs which concern on embodiment of this invention. It is a perspective view which shows the construction method of the stairs which concern on embodiment of this invention. It is sectional drawing which shows the construction method of the stairs based on embodiment of this invention. 4 is a view in the direction of arrow E in FIG. 3; FIG. 4 is a view in the direction of arrow e of FIG. 3; FIG. It is (A) a top view, (B) a front view, and (C) a side view which show the base material for stairs. It is (A) a top view, (B) a front view, and (C) a side view showing a cradle. It is (A) a top view, (B) a front view, and (C) a side view which show the base material for stairs. It is (A) a top view, (B) a front view, and (C) a side view showing a cradle. 4 is a view in the direction of arrow F in FIG. 3; FIG. 4 is a view in the direction of arrow f in FIG. 3; FIG. It is (A) a top view, (B) a front view, and (C) a side view which show the base material for stairs. It is (A) a top view, (B) a front view, and (C) a side view showing a cradle. It is (A) a top view, (B) a front view, and (C) a side view which show the base material for stairs. It is (A) a top view, (B) a front view, and (C) a side view showing a cradle. 4 is a view in the direction of arrow G in FIG. 3; FIG. It is a g arrow directional view of FIG. It is (A) a top view, (B) a front view, and (C) a side view which show the base material for stairs. It is (A) a top view, (B) a front view, and (C) a side view showing a cradle. It is (A) a top view, (B) a front view, and (C) a side view which show the base material for stairs. It is (A) a top view, (B) a front view, and (C) a side view showing a cradle. It is explanatory drawing of the construction method of an incombustible material. FIG. 10 is an explanatory diagram of a base material for stairs according to another embodiment; It is a perspective view which shows the construction method of the stairs based on other embodiment. It is (A) a top view, (B) a front view, and (C) a side view which show the base material for stairs. It is (A) a top view, (B) a front view, and (C) a side view which show the base material for stairs.

Next, a base material for stairs and a construction method for stairs according to an embodiment of the present invention will be described with reference to FIGS. 1 to 26. FIG. First, a construction method for stairs according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 and 2 are perspective views showing a construction method of stairs, and FIG. 3 is a sectional view showing a construction method of stairs according to an embodiment of the present invention.

As shown in FIGS. 1 to 3 , the method for constructing stairs according to the present embodiment is to install stairs in a staircase 100 surrounded by a plurality of pillars 1 and a plurality of studs 2 . The stairs installed in the staircase room 100 are a first straight staircase X continuing from the lower floor, a spiral staircase Y connected to the upper end of the first straight staircase X and changing the direction by 180 degrees, and a spiral staircase Y at the upper end of the spiral staircase Y. It consists of a second straight staircase Z which is connected and leads upstairs.

In constructing the stairs, first, as shown in FIG. 1, stair base materials A1, A2, B1, B2, C1, C2, D1 and D2 are fixed. At this time, the base material for stairs is fixed toward the pillar 1 from the inside of the staircase. The fixing position of each stair base material is along the setting position of the pedestal of the tread to be fixed later, and gradually rises from the lower floor to the upper floor.

The stair base materials A1 and A2 correspond to the first straight staircase X. As shown in FIG. The stair base materials B1, B2, C1, and C2 correspond to the winding staircase Y. As shown in FIG. The stair base materials D1 and D2 correspond to the second straight staircase Z. As shown in FIG.

After fixing the base material for stairs, as shown in FIG. 2, cradles a1, a2, b1, b2, c1, c2, d1 and d2 are fixed from the surface of the fixed base material for stairs. Correspondences between the base materials for stairs and the cradles are A1-a1, A2-a2, B1-b1, B2-b2, C1-c1, C2-c2, D1-d1, and D2-d2. When the pedestals are fixed, the stair base material is placed between the pedestals of the treads of the stairs and the column members of the staircase. In addition, both the pillar 1 and the stud 2 are included in the pillar member here. The outside of the column member becomes an outer wall or a room wall.

After fixing the pedestal, the stairs are constructed by fixing the treads of the stairs to the fixed pedestal. At this time, the wall surfaces other than the base material for the stairs are not constructed, and the wall surfaces are constructed only along the stairs. Since the upper floor and the lower floor are connected in this state, it can be used for work. The upper and lower walls of the base material for stairs are constructed in a predetermined stage according to the progress of construction. Finally, the surface of the base material for stairs is covered with a decorative material or the like.

Next, with reference to FIGS. 4 to 20, the stair base material and the pedestal will be described in detail. In the following description, the outer part (A1-a1, B1-b1, B2-b2, C1-c1, C2-c2, D1-d1) of the staircase 100 will be described, and the inner part (A2-a2, D2- Description of d2) is omitted.

First, the portion from the first straight staircase X to the lower stage of the circular staircase Y will be described. FIG. 4 is a view in the direction of arrow E in FIG. 3, and shows the staircase as seen from the outside. FIG. 5 is a view in the direction of arrow e in FIG. 3, and shows the staircase as seen from the inside.

A base material A1 for stairs and a receiving plate a1 are fixed to the portion of the first straight staircase X. As shown in FIG. As shown in FIG. 6, the stair base material A1 is composed of a trapezoidal plate member 10 and batten members 11, 12, 13, and 14 provided along two opposite sides of one side of the plate member 10. It is formed in a substantially U-shaped cross section. The plate member 10 is made of a noncombustible material and is preferably a plasterboard, but other materials such as a calcium silicate plate, a metal plate such as an iron plate or aluminum, or a noncombustible wood can also be used. Since it is necessary to use a noncombustible material, the thickness is 12.5 mm or more in the case of plasterboard, and in other cases the thickness is suitable for each material. When fixing the stair base material A1, which is a noncombustible material, to the pillar 1, the left and right ends of the plate member 10 are brought into contact with the pillar 1 and fixed.

Batting members 11 and 12 are provided along the upper oblique side of plate member 10 . Batting members 13 and 14 are provided along the lower oblique side of plate member 10 . Batting members are rectangular lumbers, and are covering members conforming to the specification of semi-fireproof structure specified by Japan Housing Finance Agency. In addition, in this embodiment, a rectangular bar having a cross section of 45 mm×105 mm or more was used. It does not have to be noncombustible.

Notches are provided between the batting members 11 and 12 and between the batting members 13 and 14 . This notch is for inserting an intermediate pillar member (especially the stud 2) when the stair base material A1 is fixed to the pillar member.

Batting members 11, 12, 13, and 14 protrude toward the outside of each of the two opposing sides. That is, the batten members 11 and 12 protrude upward from the upper oblique side of the plate member 10, and the batten members 13 and 14 protrude downward from the lower oblique side of the plate member 10.例文帳に追加For the protruding part of the batten member, when installing the incombustible material so that it touches the top and bottom of the stair base material in the later process, the batten member is positioned directly below the joint between the plate member of the stair base material and the incombustible material. It is for

In addition, it is preferable that the position of the batten member is such that the upper oblique side (lower oblique side) of the plate member 10 becomes the center of the batten members 11, 12 (13, 14) in the width direction.

Further, a heat insulating layer can be provided by arranging urethane foam, glass wool, rock wool, or the like between batting members facing each other (between batting members 11, 12 and batting members 13, 14). By doing so, it is possible to previously provide a heat insulating layer which is difficult to construct in a post-process because it is blocked by a batten member, a pillar member, or the like.

As shown in FIG. 7, the pedestal a1 is a member having a serrated upper oblique side. In addition, the width in the height direction of the plate member 10 of the base material for stairs A1 is equal to or greater than the width in the height direction of the pedestal a1, and when the pedestal a1 is fixed to the base material for stairs A1, The pedestal a1 does not protrude from the base material A1 for stairs.

A stair base material B1 and a receiving plate b1 are fixed to the lower part of the winding staircase Y. As shown in FIG. As shown in FIG. 8, the stair base material B1 is composed of a rectangular plate member 20 and batten members 21, 22, 23, and 24 provided along two opposite sides of one side of the plate member 20. It is formed in a substantially U-shaped cross section. The plate member 20 is made of a noncombustible material and is preferably a plasterboard. In addition, a calcium silicate plate, a metal plate such as an iron plate or aluminum, or a noncombustible wood may be used. Since it is necessary to use a noncombustible material, the thickness is 12.5 mm or more in the case of plasterboard, and in other cases the thickness is suitable for each material. In fixing the stair base material B1 to the pillar 1, the left and right ends of the plate member 20 are brought into contact with the pillar 1 and fixed.

Batting members 21 and 22 are provided along the upper side of plate member 20 . Batting members 23 and 24 are provided along the lower edge of plate member 20 . Batting members are rectangular lumbers, and are covering members conforming to the specification of semi-fireproof structure specified by Japan Housing Finance Agency. In addition, in this embodiment, a rectangular bar having a cross section of 45 mm×105 mm or more was used. It does not have to be noncombustible.

Notches are provided between batten members 21 and 22 and between batten members 23 and 24 . This notch is for inserting an intermediate pillar member (especially the stud 2) when the stair base material B1 is fixed to the pillar member.

Batting members 21, 22, 23, and 24 protrude toward the outside of each of the two opposing sides. That is, the batten members 21 and 22 protrude upward from the upper side of the plate member 20, and the batten members 23 and 24 protrude downward from the lower side of the plate member 20. As shown in FIG. For the protruding part of the batten member, when installing the incombustible material so that it touches the top and bottom of the stair base material in the later process, the batten member is positioned directly below the joint between the plate member of the stair base material and the incombustible material. It is for

In addition, it is preferable to position the batting members so that the upper side (lower side) of the plate member 20 becomes the center of the batting members 21, 22 (23, 24) in the width direction.

Further, a heat insulating layer can be provided by arranging urethane foam, glass wool, rock wool, or the like between batting members facing each other (between batting members 21, 22 and batting members 23, 24). By doing so, it is possible to previously provide a heat insulating layer which is difficult to construct in a post-process because it is blocked by a batten member, a pillar member, or the like.

The pedestal b1 is, as shown in FIG. 9, a member having a serrated upper side. The width of the plate member 20 of the stair base material B1 in the height direction is equal to or greater than the width of the pedestal b1 in the height direction. The platform b1 is designed not to protrude from the base material B1 for stairs.

Next, the middle portion of the winding staircase Y will be described. FIG. 10 is a view in the direction of arrow F in FIG. 3, showing the staircase as seen from the outside. FIG. 11 is a view in the direction of arrow f in FIG. 3, showing the staircase as seen from the inside.

In the middle portion of the winding staircase Y, stair base materials B2 and C1 and support plates b2 and c1 are fixed. 12 to 15 are diagrams showing the base material for stairs B2, the support plate b2, the base material for stairs C1, and the support plate c1. The configurations of the stair base materials B2 and C1 and the support plates b2 and c1 are the same as the configurations of the stair base material B1 and the support plates b1, and thus description thereof is omitted.

Next, the part from the upper stage of the circular staircase Y to the second straight staircase Z will be described. FIG. 16 is a view in the direction of arrow G in FIG. 3, and shows the staircase as seen from the outside. FIG. 17 is a view in the direction of arrow g in FIG. 3, which shows the staircase as seen from the inside.

A stair base material C2 and a receiving plate c2 are fixed to the upper part of the winding staircase Y. As shown in FIG. 18 and 19 are diagrams showing the base material for stairs C2 and the receiving plate c2. The configurations of the stair base material C2 and the support plate c2 are the same as the configurations of the stair base material B1 and the support plate b1, and thus description thereof is omitted.

A stair base material D1 and a receiving plate d1 are fixed to the second straight staircase Z portion. 20 and 21 are diagrams showing the base material D1 for stairs and the receiving plate d1. Since the configurations of the stair base material D1 and the support plate d1 are the same as the configurations of the stair base material A1 and the support plate a1, description thereof will be omitted.

Apart from the case of comparing the corresponding individual stair base materials and cradles, in the state where a plurality of stair base materials are fixed, the area of the plate member of the fixed stair base material is changed after fixing. The fixed cradle does not protrude from the plate member. As a result, when the noncombustible material is applied around the base material for stairs in a post-process, the noncombustible material does not come into contact with the pedestal.

FIG. 22 is an explanatory diagram of the construction method of the incombustible material. As shown in FIG. 2(A), a staircase is constructed using the base material A for stairs and a support plate a, and noncombustible materials 80, 90 are applied above and below the base material A for stairs in a post-process. The incombustible materials 80 and 90 are cut along the upper oblique side and the lower oblique side of the base material A for stairs. Then, as shown in FIG. 22(B), the noncombustible materials 80 and 90 are brought into contact with the upper oblique side and the lower oblique side of the plate member 110 of the stair base material A and fixed to the column member. At this time, the batting members 111 and 112 are positioned immediately below the joints between the plate member 110 of the stair base material A and the noncombustible materials 80 and 90, and there is no need to attach the batting again.

In addition, since the area near the bottom of the first straight staircase is narrow and difficult to construct, instead of applying noncombustible material in a later process, the plate member of the base material for the stairs is made into a substantially triangular shape and noncombustible on the lower hypotenuse side. You may make it integrate material.

Also, the peripheral edge of the plate member is preferably composed of as few straight lines as possible in order to facilitate processing. The peripheral portion of the plate member in the present embodiment is composed of four or five straight lines (quadrangular or pentagonal), but may be, for example, three straight lines (triangular). Thus, it is preferable that the peripheral portion of the plate member is composed of five or less straight lines. It should be noted that although it is possible to form a part of the peripheral portion into a curved line, it is naturally preferable that the peripheral portion is composed only of straight lines in consideration of the ease of processing.

It is particularly effective to apply the base material for stairs and the construction method of the stairs according to the present embodiment to the temporary stairs described as the background art. That is, in a temporary staircase that uses a base material (tread base) as a tread for a temporary staircase for work, and completes the staircase by fixing the decorative material (tread board decorative material) after the necessary work is completed, It has an excellent function and effect as a construction to satisfy the specifications of the quasi-fireproof structure specified by the Ministry of Housing Finance Agency.

The stair base material according to the present embodiment is a stair base material that is installed between the pedestal of the tread of the stairs and the column member of the staircase, and includes a plate member made of a noncombustible material and one side of the plate member and batting members provided along the two opposing sides of the cross section are formed into a substantially U-shaped cross section. By fixing the base material for stairs along the installation position of the pedestal of the tread of the stairs, an incombustible layer can be provided between the pedestal and the pillar member. Then, by fixing the pedestal from the surface of the fixed base material for stairs and fixing the treads of the stairs to the fixed pedestal, the stairs can be constructed before the noncombustible material is applied to the entire wall of the staircase. Therefore, the stairs can be used for work in the early stages of construction. In particular, it is effective for staircases that also serve as work passages, such as temporary staircases.

In addition, since the batten member protrudes toward the outside of each of the two opposing sides of the plate member, when the incombustible material is applied so as to be in contact with the top and bottom of the stair base material in a later process, the stair base material Since the batten member is positioned directly under the joint between the plate member and the incombustible material, there is no need to attach the batten again, and construction is easy. In addition, since the incombustible material can be cut along the upper and lower shapes of the base material for stairs, there is no need to cut it in a sawtooth shape to match the pedestal, and construction is easy. In addition, by providing an incombustible layer and arranging batten members, it is possible to meet the specifications of the ministerial ordinance quasi-fireproof structure.

In addition, since the width of the plate member in the height direction is equal to or greater than the width of the pedestal in the height direction, the incombustible material does not come into contact with the pedestal when the incombustible material is applied above and below the lower member for stairs in a later process. and is easy to construct.

In addition, since the peripheral portion of the plate member is composed of 5 or less straight lines, the plate member can be formed by cutting the noncombustible material along the 5 or less straight lines, and the processing is extremely easy.

Further, since the batten member is provided with a notch through which the pillar member is inserted, the pillar member can be inserted through the notch so that the pillar member does not get in the way when fixing the base material for the stairs. .

In addition, since the heat insulating layer is provided between the batten members facing each other, it is possible to previously provide the heat insulating layer which is difficult to construct because it is blocked by the batten member, the pillar member, or the like.

Further, the construction method for stairs according to the present embodiment is a method for constructing stairs using the base material for stairs. A noncombustible layer can be provided between the pedestal and the column member. Then, by fixing the pedestal from the surface of the fixed base material for stairs and fixing the treads of the stairs to the fixed pedestal, the stairs can be constructed before the noncombustible material is applied to the entire wall of the staircase. Therefore, the stairs can be used for work in the early stages of construction. In particular, it is effective for a staircase that also serves as a work passage, such as a temporary staircase.

In addition, since the area of the plate member of the fixed stair base material is equal to or larger than the area of the pedestal, and the fixed pedestal does not protrude from the plate member, a noncombustible material is applied around the stair base material in a later process. In this case, the noncombustible material does not come into contact with the cradle, and construction is easy.

As described above, according to the base material for stairs and the construction method for stairs according to the present embodiment, it is possible to construct stairs in the initial stage of construction, satisfy the specifications of the ministerial ordinance quasi-fireproof structure, and facilitate construction. is. In particular, it is effective for a staircase that also serves as a work passage, such as a temporary staircase.

Although the base material for stairs and the construction method for stairs according to the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various other modifications are possible.

For example, in the above embodiment, the width in the height direction of the plate member of the base material for the stairs is set to be equal to or greater than the width in the height direction of the pedestal, but it may be set to be equal to or less than the width in the height direction of the pedestal. can. FIG. 23 shows a base material for stairs according to another embodiment. In FIG. 23(A), the width in the height direction of the plate member of the stair base material is set to be equal to or greater than the width in the height direction of the pedestal, as in the above embodiment, but FIG. And FIG. 23(C) is less than or equal to the width in the height direction of the cradle. In this case, when the noncombustible material is applied above and below the base material for stairs in a post-process, construction is possible if the noncombustible material can be inserted between the already fixed receiving plate a and the column member. However, since workability is lowered, it is preferable that the difference from the height direction of the cradle is as small as possible, and FIG. 23(b) is more preferable than FIG. 23(C).

Further, the base material for stairs and the receiving plate can be integrated in advance.

Also, in the above embodiment, the notch for inserting the pillar member is provided in the batten member, but this is an example corresponding to general pillars and studs, and the size and number of notches are limited. Various types are conceivable depending on the internal structure of the wall. Moreover, notch processing can be performed at the construction site without performing notch processing at the time of shipment from the factory.

Further, depending on the internal structure of the wall, the batten member of the stair base material may be configured without notches. 24A and 24B are perspective views showing a construction method for stairs according to another embodiment, and FIGS. It is a side view. In the staircase 200 shown in FIG. 24, there is no pillar member to be inserted through the middle portion of each stair base material. Therefore, as shown in FIGS. 25 and 26, a base member for stairs having no notches in batting members can be used.

Of course, depending on the internal structure of the wall, a stair base material having a batten member with a notch and a stair base material having a batten member without a notch can be used in combination.

1 pillar 2 stud 10 board member 11, 12, 13, 14 batten member 20 board member 21, 22, 23, 24 batten member 30 board member 31, 32, 33, 34 batten member 40 board member 41, 42, 43, 44 batten member 50 plate member 51, 52, 53, 54 batten member 60 plate member 71, 72, 73, 74 batten member 80, 90 incombustible material 100 staircase 110 plate member 111, 112 batten member 200 Staircases A, A1, A2, B1, B2, C1, C2, D1, D2 Base materials for stairs a, a1, a2, b1, b2, c1, c2, d1, d2 Pedestal X First straight stair Y Around Stair Z Second Straight Stair

Claims (7)

A stair base material installed between a tread cradle of a staircase and a pillar member of a staircase,
A plate member made of a noncombustible material and batting members provided along two opposite sides of one side of the plate member are formed to have a substantially U-shaped cross section,
A base member for stairs, wherein the batting member protrudes outward from each of the two opposing sides. 2. The base material for stairs according to claim 1, wherein the width of the plate member in the height direction is equal to or greater than the width of the pedestal in the height direction. 2. The base material for stairs according to claim 1, wherein the peripheral portion of said plate member is composed of five or less straight lines. 2. The base material for stairs according to claim 1, wherein the batting member is provided with a notch through which the column member is inserted. 2. The base material for stairs according to claim 1, wherein a heat insulating layer is provided between said batten members facing each other. A stair construction method using the base material for stairs according to claim 1,
The stair base material is fixed along the installation position of the pedestal of the stair tread, the pedestal is fixed from the surface of the fixed stair base material, and the stair tread is fixed to the fixed pedestal. A method of constructing a staircase characterized by: 7. The method for constructing stairs according to claim 6, wherein the area of the fixed plate member of the stair base material is equal to or larger than the area of the pedestal, and the fixed pedestal does not protrude from the plate member. .

Images