JP6630052B2 - building - Google Patents

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JP6630052B2
JP6630052B2 JP2015057283A JP2015057283A JP6630052B2 JP 6630052 B2 JP6630052 B2 JP 6630052B2 JP 2015057283 A JP2015057283 A JP 2015057283A JP 2015057283 A JP2015057283 A JP 2015057283A JP 6630052 B2 JP6630052 B2 JP 6630052B2
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floor
stairs
floor beam
slab
surface material
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JP2016176251A (en
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直 宮嶋
直 宮嶋
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Asahi Kasei Homes Corp
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Description

本発明は、階段を備える建物に関する。   The invention relates to a building with stairs.

従来、住戸において、空間を区画する壁に接するように階段を設置することがある。例えば、特許文献１には、階段の桁が住戸の境となる界壁に沿うように階段を設置する構成が記載されている。   2. Description of the Related Art Conventionally, in a dwelling unit, a stair may be installed so as to be in contact with a wall that partitions a space. For example, Patent Literature 1 discloses a configuration in which stairs are installed so that a girder of the stairs is along a boundary wall that is a boundary of dwelling units.

特開２００１−３０３７３５号公報JP 2001-303735 A

特許文献１に記載されているように、階段の桁が壁に沿うように階段を設置する場合には、壁を構成する面材について納まり上の問題は少ない。しかしながら、階段と上階床梁との接続部（階段の降り口）の直下に壁を設ける場合、すなわち、階段が接続される上階床梁の直下に当該上階床梁に沿って壁を設ける場合、階段と壁の面材とが干渉するため面材の納まりが悪くなる場合がある。   As described in Patent Literature 1, when the stairs are installed such that the spar of the stairs is along the wall, there is little problem in fitting the face materials constituting the wall. However, in the case where a wall is provided immediately below the connection between the stairs and the upper floor beam (the exit of the stairs), that is, the wall is formed along the upper floor beam directly below the upper floor beam to which the stairs are connected. If provided, the stairs may interfere with the surface material of the wall, which may make it difficult to accommodate the surface material.

そこで、本発明は、階段と上階床梁との接続部の直下に壁を設ける場合に、階段と壁を構成する面材とが干渉することを抑制できる建物を提供することを目的とする。   Therefore, an object of the present invention is to provide a building capable of suppressing interference between a stair and a face material forming a wall when a wall is provided immediately below a connection between a stair and an upper floor beam. .

本発明に係る建物は、上階床梁と当該上階床梁の上面に支持されたスラブとを備える上階床層と、当該上階床層と下階床層とを連絡する階段と、の接続部において、階段の上端側は、下階床層から起立した支柱により支持され、階段を構成する桁部材の上端部は、上階床梁の側面との間に隙間部が形成されるように上階床梁の側面から所定距離離間して上階床梁の側面に対向する。   The building according to the present invention includes an upper floor layer including an upper floor beam and a slab supported on the upper surface of the upper floor beam, and a stair connecting the upper floor layer and the lower floor layer. In the connection portion, the upper end side of the stairs is supported by a support standing upright from the lower floor layer, and a gap portion is formed between the upper end of the girder member forming the stairs and the side surface of the upper floor beam. As described above, the upper floor beams are spaced apart from the side surfaces of the upper floor beams by a predetermined distance.

この建物は、桁部材の上端部と上階床梁の側面との間に隙間部を有している。このため、上階床梁と階段との接続部（階段の降り口）の直下に間仕切壁等の壁を設ける場合、すなわち、階段が接続される上階床梁の直下に当該上階床梁に沿って壁を設ける場合、壁を構成する面材を隙間部に差し込むことができるため面材と階段の上端部との干渉を抑制できる。これにより、壁を構成する面材の加工（例えば欠き込み加工等）が少なくなり、壁の施工の手間を軽減できる。   This building has a gap between the upper end of the girder member and the side of the upper floor beam. For this reason, in the case where a wall such as a partition wall is provided immediately below a connection portion (a stairway exit) between the upper floor beam and the stairs, that is, the upper floor beam is directly below the upper floor beam to which the stairs are connected. When the wall is provided along, the face material constituting the wall can be inserted into the gap, so that interference between the face material and the upper end of the staircase can be suppressed. Thereby, processing (for example, notch processing etc.) of the surface material which comprises a wall decreases, and the labor of wall construction can be reduced.

建物は、接続部に位置する上階床梁の延在方向に沿って下階の界壁が形成されており、スラブは、所定の耐火性を有し、隙間部には、界壁を構成する耐火面材が配置され、耐火面材の上端は、スラブの下面に当接していてもよい。このように、上階床梁と階段との接続部の直下に界壁を設置する場合、界壁を構成する面材の加工が少なくなり、且つ面材とスラブとを連続させることができるので、防耐火性能の低下を抑制できる。また、上階床梁と階段との接続部の直下にも容易に界壁を設置することができるため、接続部を避けて界壁を設置する必要が無く、間取り設計の制約を解消することができる。   In the building, a lower-floor boundary wall is formed along the extending direction of the upper-floor floor beam located at the connection portion, the slab has predetermined fire resistance, and the clearance portion forms a boundary wall. The upper end of the refractory surface material may be in contact with the lower surface of the slab. As described above, when the boundary wall is installed immediately below the connection between the upper floor beam and the stairs, the processing of the surface material forming the boundary wall is reduced, and the surface material and the slab can be continuous. In addition, a decrease in fireproof performance can be suppressed. Also, since the boundary wall can be easily installed directly below the connection between the upper floor beam and the stairs, there is no need to install the boundary wall avoiding the connection part, and the restriction on the floor plan design is eliminated. Can be.

階段は、蹴込部と踏板部とが断面略Ｌ字状に接続された段板部材を複数有し、複数の段板部材のうち耐火面材の上端に近接する段板部材の蹴込部は、隙間部に臨む開口を有していてもよい。この場合、作業者は、蹴込部に設けられた開口を介して、隙間部内に配置された耐火面材の上端部の固定作業等を行うことができる。従って、耐火面材の設置の作業性を向上させることができる。   The stairs have a plurality of step board members in which the riser and the tread are connected in a substantially L-shaped cross section, and the riser of the step board member that is close to the upper end of the fireproof surface material among the plurality of step board members, It may have an opening facing the gap. In this case, the worker can perform, for example, fixing work on the upper end of the fireproof surface material arranged in the gap through the opening provided in the riser. Therefore, the workability of the installation of the refractory surface material can be improved.

段板部材は荷重を伝達するための下地部材であり、段板部材の表面には、仕上げ部材が貼り付けられており、開口は、仕上げ部材によって覆われていてもよい。この場合、段板部材に開口が設けられていても、仕上げ部材によって開口が覆われるため、開口が階段の美観に影響を与えることが無い。   The step board member is a base member for transmitting a load, and a finishing member is attached to a surface of the step board member, and the opening may be covered by the finishing member. In this case, even if an opening is provided in the step board member, the opening is covered by the finishing member, so that the opening does not affect the beauty of the stairs.

本発明によれば、階段と上階床梁との接続部の直下に壁を設ける場合に、階段と壁を構成する面材とが干渉することを抑制できる。   ADVANTAGE OF THE INVENTION According to this invention, when providing a wall directly under the connection part of a stair and an upper floor beam, it can suppress that a stair and the surface material which comprises a wall interfere.

実施形態に係る建物の２階における階段周りの平面図である。It is a top view around the stairs in the 2nd floor of the building concerning an embodiment. 階段の構造を示す斜視図である。It is a perspective view which shows the structure of a stair. 階段の構造を示す別の方向から見た斜視図である。It is the perspective view seen from another direction which shows the structure of the stairs. 図１におけるIV−IV線に沿った断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG. 1.

以下、本発明に係る建物の実施形態について図面を参照しながら説明する。なお、図面の説明において同一の要素には同一の符号を付し、重複する説明を省略する。   Hereinafter, embodiments of a building according to the present invention will be described with reference to the drawings. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description.

図１に示す建物Ｘは、基礎から立ち上がる複数本の柱と、隣り合う柱間に架設される複数本の梁とによって構成された、例えば鉄骨造の建物である。建物Ｘは、少なくとも上階と、上階の一つ下層の下階とを有している。本実施形態において建物Ｘは、２階建ての建物とする。   The building X shown in FIG. 1 is, for example, a steel-framed building constituted by a plurality of pillars rising from the foundation and a plurality of beams erected between adjacent pillars. The building X has at least an upper floor and one lower floor of the upper floor. In this embodiment, the building X is a two-story building.

図１〜図４に示すように、建物Ｘは、１階と２階との間を昇降するための階段１を備えている。階段１は、平面視で、昇降方向が直角に屈曲したＬ字形状の階段である。階段１は、１階床（下階床層）と２階床（上階床層）Ｆとを連絡している。階段１は、一対の桁部材１１、複数の支柱１２、及び複数の段板部材１３、を備えている。   As shown in FIGS. 1 to 4, the building X includes a stair 1 for moving up and down between the first floor and the second floor. The staircase 1 is an L-shaped staircase whose vertical direction is bent at a right angle in plan view. The stairs 1 communicate the first floor (lower floor layer) and the second floor (upper floor layer) F. The stairs 1 include a pair of spar members 11, a plurality of columns 12, and a plurality of step board members 13.

桁部材１１は、平面視でＬ字形状に屈曲している。段板部材１３の両端部は、一対の桁部材１１によってそれぞれ支持されている。支柱１２は、鉛直方向に沿って延在し、１階床から起立している。なお、支柱１２は、１階床を構成するスラブから起立していてもよく、１階床のスラブを支持する梁から起立していてもよい。支柱１２は、桁部材１１を支持している。階段１は、支柱１２によって桁部材１１及び段板部材１３が支持された自立式の階段である。ここで、階段１は、少なくとも階段１の上端側が支柱１２によって支持されていればよい。階段１の下端側は、支柱１２以外の構造体によって支持されていてもよい。   The beam member 11 is bent in an L-shape in plan view. Both ends of the step plate member 13 are supported by a pair of spar members 11, respectively. The column 12 extends along the vertical direction, and stands upright from the first floor. In addition, the support | pillar 12 may be erected from the slab which comprises the 1st floor, and may be erected from the beam which supports the slab of the 1st floor. The support 12 supports the beam member 11. The staircase 1 is a self-supporting staircase in which the spar member 11 and the step board member 13 are supported by the columns 12. Here, the stairs 1 only need to be supported by the columns 12 at least on the upper end side of the stairs 1. The lower end side of the stairs 1 may be supported by a structure other than the pillar 12.

建物Ｘの２階床Ｆは、複数の２階床梁（上階床梁）Ｈと、２階床梁Ｈの上面に支持された複数枚のスラブ２０（図４参照）とを備えている。本実施形態では、２階床梁Ｈとして、一例としてＨ形鋼を用いている。スラブ２０は、例えば、軽量気泡コンクリートで形成された板であってもよい。スラブ２０は、所定の耐火性を有している。スラブ２０の上面には、フローリング等の床材が設置されている。   The second floor F of the building X includes a plurality of second floor beams (upper floor beams) H and a plurality of slabs 20 (see FIG. 4) supported on the upper surface of the second floor beams H. . In this embodiment, as the floor beam H on the second floor, an H-section steel is used as an example. The slab 20 may be, for example, a plate formed of lightweight cellular concrete. The slab 20 has a predetermined fire resistance. On the upper surface of the slab 20, a floor material such as a flooring is installed.

建物Ｘの２階床Ｆには、矩形状の開口Ｒが設けられている。開口Ｒの一つの辺に、階段１の上端部が接続されている。ここで、２階床Ｆと階段１との接続部分を、接続部Ａと称する。また、開口Ｒを構成する辺のうち、階段１の上端部が接続される辺に沿って配置された２階床梁Ｈを、２階床梁Ｈａと称する。   On the second floor F of the building X, a rectangular opening R is provided. The upper end of the staircase 1 is connected to one side of the opening R. Here, a connection portion between the second floor F and the stairs 1 is referred to as a connection portion A. Further, among the sides constituting the opening R, the second floor beam H arranged along the side to which the upper end of the staircase 1 is connected is referred to as a second floor beam Ha.

以下、階段１と２階床Ｆとの接続部Ａの周りの構成について詳細に説明する。桁部材１１の上端部は、２階床梁Ｈａの側面との間に隙間部Ｓが形成されるように２階床梁Ｈａの側面から所定距離離間して２階床梁Ｈａの側面に対向する。具体的には、桁部材１１は、桁部材１１の上端側において、桁材１１ａ、エンドプレート１１ｂ、及び連結板材１１ｃを有している。   Hereinafter, the configuration around the connection portion A between the stairs 1 and the second floor F will be described in detail. The upper end of the girder member 11 faces the side surface of the second floor floor beam Ha at a predetermined distance from the side surface of the second floor floor beam Ha such that a gap S is formed between the beam member 11 and the side surface of the second floor floor beam Ha. I do. Specifically, the girder member 11 has a girder member 11a, an end plate 11b, and a connecting plate member 11c on the upper end side of the girder member 11.

桁材１１ａは、長尺の鋼材である。エンドプレート１１ｂは、桁材１１ａの上端側の小口に取り付けられている。桁部材１１は、エンドプレート１１ｂと２階床梁Ｈａの側面との間に隙間部Ｓが形成されるように支柱１２によって支持されている。図４に示すように、エンドプレート１１ｂの上端の高さ位置は、２階床梁Ｈａの上面の高さ位置と一致している。   The beam member 11a is a long steel material. The end plate 11b is attached to a small edge on the upper end side of the beam member 11a. The girder member 11 is supported by the columns 12 so that a gap S is formed between the end plate 11b and the side surface of the second floor beam Ha. As shown in FIG. 4, the height position of the upper end of the end plate 11b coincides with the height position of the upper surface of the second floor floor beam Ha.

連結板材１１ｃは、エンドプレート１１ｂの上端部に連結され、２階床梁Ｈａ側に向かって延びている。連結板材１１ｃは、２階床梁Ｈａの上面にボルト接合されている。ここで、連結板材１１ｃが２階床梁Ｈａに接合されているが、例えば、連結板材１１ｃは階段１の位置ずれ（揺れ）等を抑制するための部材である。上述したように階段１は自立式の階段であり、連結板材１１ｃは階段１に加わる荷重を支えるための部材ではない。   The connecting plate 11c is connected to the upper end of the end plate 11b and extends toward the second floor floor beam Ha. The connecting plate 11c is bolted to the upper surface of the second floor floor beam Ha. Here, the connecting plate 11c is joined to the second floor floor beam Ha. For example, the connecting plate 11c is a member for suppressing the displacement (sway) of the stairs 1 and the like. As described above, the staircase 1 is a self-supporting staircase, and the connecting plate 11c is not a member for supporting the load applied to the staircase 1.

段板部材１３は、蹴込部１３ａと踏板部１３ｂとを断面略Ｌ字状に接続することによって形成されている。段板部材１３の両端部は、一対の桁部材１１にそれぞれ連結されている。ここで、複数の段板部材１３のうち、最も上側に配置される段板部材１３を段板部材１３Ａと称する（図３及び図４参照）。段板部材１３Ａは、２つの蹴込部１３ａと、当該２つの蹴込部１３ａ同士を連結する踏板部１３ｂとを有している。   The step board member 13 is formed by connecting the riser portion 13a and the tread portion 13b in a substantially L-shaped cross section. Both ends of the step board member 13 are connected to the pair of beam members 11 respectively. Here, among the plurality of step board members 13, the step board member 13 arranged at the uppermost position is referred to as a step board member 13A (see FIGS. 3 and 4). The step board member 13A has two kick portions 13a and a tread portion 13b connecting the two kick portions 13a to each other.

ここで、段板部材１３Ａが有する２つの蹴込部１３ａのうち上側に配置された蹴込部１３ａを蹴込部１３ｘと称する。蹴込部１３ｘは、２階床梁Ｈａの側面に対向する部位と、２階床梁Ｈａの上面から上側に突出した部位とを有する。蹴込部１３ｘの上端部には、スラブ２０側に向けて折り曲げられた折曲部１３ｃが設けられている。折曲部１３ｃの高さ位置は、スラブ２０の上面の高さ位置よりも所定高さ高くなっている。蹴込部１３ｘは、隙間部Ｓに臨む開口１３ｚを有している。（図３参照）。   Here, of the two risers 13a of the step board member 13A, the riser 13a arranged above is referred to as a riser 13x. The riser 13x has a portion facing the side surface of the second floor floor beam Ha and a portion projecting upward from the upper surface of the second floor floor beam Ha. A bent portion 13c bent toward the slab 20 is provided at the upper end of the riser 13x. The height position of the bent portion 13c is higher than the height position of the upper surface of the slab 20 by a predetermined height. The riser 13x has an opening 13z facing the gap S. (See FIG. 3).

図４に示すように、段板部材１３は、荷重を桁材１１ａに伝達するための下地部材である。段板部材１３の表面には、仕上げ部材１５が貼り付けられている。蹴込部１３ｘに設けられた開口１３ｚは、仕上げ部材１５によって覆われている。   As shown in FIG. 4, the step board member 13 is a base member for transmitting a load to the beam member 11a. A finishing member 15 is attached to the surface of the step board member 13. The opening 13z provided in the riser 13x is covered by the finishing member 15.

図４に示すように、接続部Ａの周りにおいて、スラブ２０と階段１との間にはモルタル２１が充填されている。モルタル２１は、スラブ２０と同様に所定の耐火性を有している。図２及び図４に示すように、モルタル２１が２階床梁Ｈａの上面から蹴込部１３ｘ側に流れ込むことを防止するため、２階床梁Ｈａの上面にモルタ止め１６が設けられている。   As shown in FIG. 4, the mortar 21 is filled between the slab 20 and the stairs 1 around the connection portion A. The mortar 21 has a predetermined fire resistance like the slab 20. As shown in FIGS. 2 and 4, a mortar stop 16 is provided on the upper surface of the second floor floor beam Ha in order to prevent the mortar 21 from flowing from the upper surface of the second floor floor beam Ha to the riser 13x side.

モルタル止め１６は、一対の外側止め部材１６ａ、及び内側止め部材１６ｂを有している。外側止め部材１６ａは、断面略Ｌ字状に形成されている。一対の外側止め部材１６ａは、一対の連結板材１１ｃの上面にそれぞれ載置されている。外側止め部材１６ａの上端部は、折曲部１３ｃの下面近傍まで延びている。内側止め部材１６ｂは、一対の連結板材１１ｃ間において、２階床梁Ｈａの上面に載置されている。内側止め部材１６ｂの上端部は、折曲部１３ｃの下面近傍まで延びている。内側止め部材１６ｂは、屈曲部分を補強するためのリブを有していてもよい。   The mortar stopper 16 has a pair of outer stopper members 16a and inner stopper members 16b. The outer stop member 16a is formed in a substantially L-shaped cross section. The pair of outer stop members 16a are respectively mounted on the upper surfaces of the pair of connecting plate members 11c. The upper end of the outer stopper 16a extends to near the lower surface of the bent portion 13c. The inner stop member 16b is placed on the upper surface of the second floor floor beam Ha between the pair of connecting plate members 11c. The upper end of the inner stop member 16b extends to near the lower surface of the bent portion 13c. The inner stop member 16b may have a rib for reinforcing a bent portion.

図１及び図４に示すように、２階床梁Ｈａの延在方向に沿って、１階の界壁３０が形成されている。図４に示すように、界壁３０は、第一耐火面材３１、及び第二耐火面材（耐火面材）３２を有している。第一耐火面材３１及び第二耐火面材３２として、例えば石膏ボードを用いることができる。２階床梁Ｈａは、第一耐火面材３１と第二耐火面材３２とによって挟み込まれている。第一耐火面材３１と第二耐火面材３２との間には、遮音材及び耐火材等が配置されている。   As shown in FIGS. 1 and 4, the first-floor boundary wall 30 is formed along the extending direction of the second-floor floor beam Ha. As shown in FIG. 4, the boundary wall 30 has a first fireproof surface material 31 and a second fireproof surface material (fireproof surface material) 32. As the first fire-resistant face material 31 and the second fire-resistant face material 32, for example, a gypsum board can be used. The second-floor floor beam Ha is sandwiched between the first fire-resistant face material 31 and the second fire-resistant face material 32. Between the first fireproof material 31 and the second fireproof material 32, a sound insulating material, a fireproof material and the like are arranged.

第一耐火面材３１及び第二耐火面材３２のうち、第二耐火面材３２が、２階床梁Ｈａよりも桁部材１１のエンドプレート１１ｂ側に配置されている。第一耐火面材３１の上端は、スラブ２０の下面に当接している。第二耐火面材３２の上端部は、２階床梁Ｈａと桁部材１１のエンドプレート１１ｂとの間の隙間部Ｓに差し込まれている。第二耐火面材３２の上端は、モルタル２１の下面に当接している。より詳細には、本実施形態において第二耐火面材３２の上端は、モルタル止め１６、或いは、連結板材１１ｃ及びモルタル止め１６を介してモルタル２１の下面に当接している。このように、２階床梁Ｈａの側面とエンドプレート１１ｂとの間に隙間部Ｓが設けられているので、第二耐火面材３２の上端の高さ位置と２階床梁Ｈａの上面の高さ位置とが一致するように第二耐火面材３２を配置することができる。   Among the first fire-resistant face material 31 and the second fire-resistant face material 32, the second fire-resistant face material 32 is arranged on the end plate 11b side of the spar member 11 with respect to the second floor floor beam Ha. The upper end of the first refractory face member 31 is in contact with the lower surface of the slab 20. The upper end of the second refractory surface material 32 is inserted into the gap S between the second floor floor beam Ha and the end plate 11 b of the girder member 11. The upper end of the second refractory face material 32 is in contact with the lower surface of the mortar 21. More specifically, in the present embodiment, the upper end of the second refractory surface material 32 is in contact with the lower surface of the mortar 21 via the mortar stopper 16 or the connecting plate 11 c and the mortar stopper 16. Since the gap S is provided between the side surface of the second floor beam Ha and the end plate 11b in this manner, the height position of the upper end of the second fireproof surface material 32 and the upper surface of the second floor beam Ha The second refractory face material 32 can be arranged so that the height position coincides with the height position.

本実施形態では、モルタル２１の下面に第二耐火面材３２の上端を当接させたが、第二耐火面材３２の上端をスラブ２０の下面に当接させてもよい。具体的には、スラブ２０が２階床梁Ｈａよりも階段１側に突出するように、スラブ２０を２階床梁Ｈａに載置する。そして、スラブ２０の下面のうち、２階床梁Ｈａから突出した部分に第二耐火面材３２の上端を当接させてもよい。   In the present embodiment, the upper end of the second refractory surface material 32 abuts on the lower surface of the mortar 21, but the upper end of the second refractory surface material 32 may abut on the lower surface of the slab 20. Specifically, the slab 20 is placed on the second-floor floor beam Ha so that the slab 20 protrudes more toward the stairs 1 than the second-floor floor beam Ha. Then, the upper end of the second refractory surface material 32 may be brought into contact with a portion of the lower surface of the slab 20 protruding from the second floor beam Ha.

ここで、蹴込部１３ｘは、第二耐火面材３２の上端部に近接している。作業者は、蹴込部１３ｘに設けられた開口１３ｚを介して第二耐火面材３２の上端部を２階床梁Ｈａ等に固定する作業などを行うことができる。   Here, the riser 13x is close to the upper end of the second refractory surface material 32. The worker can perform work such as fixing the upper end of the second fireproof surface material 32 to the second floor floor beam Ha or the like through the opening 13z provided in the riser 13x.

本実施形態は以上のように構成され、この階段１は、桁部材１１の上端部に設けられたエンドプレート１１ｂと、２階床梁Ｈａの側面との間に隙間部Ｓを有している。このため、２階床梁Ｈａと階段１との接続部Ａ（階段の降り口）の直下に界壁３０を設ける場合、すなわち、２階床梁Ｈａの直下に２階床梁Ｈａに沿って界壁３０を設ける場合、第二耐火面材３２を隙間部Ｓに差し込むことができるので第二耐火面材３２と階段１の上端部との干渉を抑制できる。これにより、第二耐火面材３２の加工（例えば欠き込み加工等）が少なくなり、界壁３０の施工の手間を軽減できる。   This embodiment is configured as described above, and this staircase 1 has a gap S between the end plate 11b provided at the upper end of the girder member 11 and the side surface of the second floor floor beam Ha. . Therefore, when the boundary wall 30 is provided immediately below the connection portion A (the exit of the stairs) between the second floor floor beam Ha and the stairs 1, that is, along the second floor floor beam Ha directly below the second floor floor beam Ha. When the boundary wall 30 is provided, the second fire-resistant surface material 32 can be inserted into the gap S, so that interference between the second fire-resistant surface material 32 and the upper end of the staircase 1 can be suppressed. Thereby, processing (for example, notch processing etc.) of the second refractory surface material 32 is reduced, and the labor of construction of the boundary wall 30 can be reduced.

第二耐火面材３２の上端は、２階床Ｆのモルタル２１の下面に当接している。このように、界壁３０を設置する場合、第二耐火面材３２の加工が少なくなり、且つ第二耐火面材３２と２階床Ｆのモルタル２１とを連続させることができるので、防耐火性能の低下を抑制できる。また、２階床梁Ｈａと階段１との接続部Ａの直下にも容易に界壁３０を設置することができるため、接続部Ａを避けて界壁３０を設置する必要が無く、間取り設計の制約を解消することができる。   The upper end of the second refractory face material 32 is in contact with the lower surface of the mortar 21 on the second floor F. As described above, when the boundary wall 30 is installed, the processing of the second fire-resistant face material 32 is reduced, and the second fire-resistant face material 32 and the mortar 21 on the second floor F can be connected. Performance degradation can be suppressed. In addition, since the boundary wall 30 can be easily installed immediately below the connection portion A between the second floor floor beam Ha and the stairs 1, there is no need to install the boundary wall 30 avoiding the connection portion A, and the floor plan is designed. Can be eliminated.

なお、上述したように、スラブ２０が２階床梁Ｈａよりも階段１側に突出しており、スラブ２０の下面に第二耐火面材３２の上端を当接させてもよい。この場合であっても、防耐火性能の低下を抑制でき、間取り設計の制約を解消することができる。   Note that, as described above, the slab 20 may protrude more toward the stairs 1 than the second-floor floor beam Ha, and the upper end of the second fire-resistant face material 32 may abut the lower surface of the slab 20. Even in this case, a decrease in fireproof performance can be suppressed, and restrictions on the floor plan design can be eliminated.

第二耐火面材３２の上端に近接する段板部材１３Ａの蹴込部１３ｘは、隙間部Ｓに臨む開口１３ｚを有している。この場合、作業者は、蹴込部１３ｘに設けられた開口１３ｚを介して、隙間部Ｓ内に配置された第二耐火面材３２の上端部の固定作業等を行うことができる。従って、第二耐火面材３２の設置の作業性を向上させることができる。   The riser 13x of the step board member 13A adjacent to the upper end of the second refractory face member 32 has an opening 13z facing the gap S. In this case, the worker can fix the upper end of the second fire-resistant face material 32 arranged in the gap S through the opening 13z provided in the riser 13x. Therefore, the workability of installing the second fire-resistant face material 32 can be improved.

段板部材１３の表面には、仕上げ部材１５が貼り付けられている。また、蹴込部１３ｘに設けられた開口１３ｚは、仕上げ部材１５によって覆われている。これにより、蹴込部１３ｘに開口１３ｚが設けられていても、仕上げ部材１５によって開口１３ｚを覆うことができるため、開口１３ｚが階段１の美観に影響を与えることが無い。   A finishing member 15 is attached to the surface of the step board member 13. The opening 13z provided in the riser 13x is covered by the finishing member 15. Thus, even if the opening 13z is provided in the riser 13x, the opening 13z can be covered by the finishing member 15, so that the opening 13z does not affect the beauty of the stairs 1.

以上、本発明の実施形態について説明したが、本発明は、上記実施形態に限定されるものではない。例えば、階段１は、平面視でＬ字形状に屈曲している構成を例に説明したが、例えば直線状の階段などＬ字形状以外の形状の階段であってもよい。   As described above, the embodiments of the present invention have been described, but the present invention is not limited to the above embodiments. For example, the configuration in which the stairs 1 are bent in an L-shape in plan view has been described as an example.

２階床梁Ｈａの直下に界壁３０を設けたが、界壁３０に代えて間仕切り壁を設けてもよい。段板部材１３の蹴込部１３ｘに開口１３ｚを設けたが、開口１３ｚを設けることは必須ではない。   Although the boundary wall 30 is provided directly below the second floor floor beam Ha, a partition wall may be provided instead of the boundary wall 30. Although the opening 13z is provided in the riser portion 13x of the step board member 13, the provision of the opening 13z is not essential.

１…階段、２０…スラブ、１１…桁部材、１２…支柱、１３…段板部材（下地部材）、１３ａ…蹴込部、１３ｂ…踏板部、１３ｘ…蹴込部（耐火面材の上端に近接する段板部材の蹴込部）、１３ｚ…開口、１５…仕上げ部材、３０…界壁、３２…第二耐火面材（耐火面材）、Ａ…接続部、Ｆ…２階床（上階床層）、Ｈａ…２階床梁（上階床梁）、Ｘ…建物。   DESCRIPTION OF SYMBOLS 1 ... Stairs, 20 ... Slab, 11 ... Girder member, 12 ... Prop, 13 ... Step board member (base member), 13a ... Kick portion, 13b ... Tread plate portion, 13x ... Kick portion (close to the upper end of fire-resistant surface material) 13z ... opening, 15 ... finishing member, 30 ... boundary wall, 32 ... second fireproof surface material (fireproof material), A ... connecting part, F ... 2nd floor (upper floor layer) ), Ha: 2nd floor beam (upper floor beam), X: Building.

Claims (3)

上階床梁と当該上階床梁の上面に支持されたスラブとを備える上階床層と、当該上階床層と下階床層とを連絡する階段と、の接続部において、
前記階段の上端側は、前記階段を構成する桁部材の下方に配置され前記下階床層から起立した支柱により支持され、
前記階段を構成する桁部材の上端部は、前記上階床梁の側面との間に隙間部が形成されるように前記上階床梁の側面から所定距離離間して前記上階床梁の側面に対向し、
前記隙間部には、前記接続部に位置する前記上階床梁の延在方向に沿って形成された下階の界壁または間仕切り壁を構成する耐火面材が差し込まれており、
前記階段は、蹴込部と踏板部とが断面略Ｌ字状に接続された段板部材を複数有し、
前記複数の段板部材のうち前記耐火面材の上端に近接する前記段板部材の前記蹴込部は、前記隙間部に臨む開口を有する、建物。 In a connection portion of an upper floor layer including an upper floor beam and a slab supported on the upper surface of the upper floor beam, and a stair connecting the upper floor layer and the lower floor layer,
The upper end side of the stairs is supported by a column that is arranged below a girder member that constitutes the stairs and that stands upright from the lower floor layer,
The upper end of the girder member forming the stairs is separated from the side of the upper floor beam by a predetermined distance so that a gap is formed between the upper floor beam and the side of the upper floor beam. Facing the side,
In the gap portion, a fire-resistant surface material constituting a lower-floor boundary wall or a partition wall formed along an extending direction of the upper-floor floor beam located at the connection portion is inserted .
The stairs have a plurality of step board members in which the riser portion and the tread portion are connected in a substantially L-shaped cross section,
The riser portion of the step plate member adjacent to the upper end of the refractory surface material of the plurality of stair treads member that have a opening facing the gap portion, a building. 前記耐火面材の上端は、前記スラブの下面に当接している、請求項１に記載の建物。   The building according to claim 1, wherein an upper end of the refractory surface material is in contact with a lower surface of the slab. 前記段板部材は荷重を伝達するための下地部材であり、
前記段板部材の表面には、仕上げ部材が貼り付けられており、
前記開口は、前記仕上げ部材によって覆われている、請求項１又は２に記載の建物。 The step plate member is a base member for transmitting a load,
A finishing member is attached to the surface of the step board member,
The opening, said covered by the finishing member, building according to claim 1 or 2.
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