JP3559543B2

JP3559543B2 - Frame structure of steel house low-rise building

Info

Publication number: JP3559543B2
Application number: JP2001348879A
Authority: JP
Inventors: 辰生江崎; 伸一郎橋本; 喜満村橋; 繁明藤内
Original assignee: Nippon Steel Corp
Current assignee: Nippon Steel Corp
Priority date: 2001-11-14
Filing date: 2001-11-14
Publication date: 2004-09-02
Anticipated expiration: 2021-11-14
Also published as: JP2003147852A

Description

【０００１】
【発明の属する技術分野】
本発明は、２階、３階建の低層建物で、かつ大きな開口部を有する建物を構成するスチールハウス（板厚１ｍｍ前後の薄板軽量形鋼による枠材と構造用面材による鉄鋼系パネル構造の建物をスチールハウスと定義する）における枠組構造に関する。
【０００２】
【従来の技術】
従来、低層用建物に採用される工法として鉄骨軸組み工法が主流であったが、最近、２、３階の低層建物において、スチールハウス（ＳＨ）工法が普及しつつある。
【０００３】
スチールハウスは前述のとおり、薄板軽量形鋼製の枠材を建物全体の主架構要素とし、必要に応じて部分的に木製枠材や合板製面材を薄板軽量形鋼製の枠材に組合わせて構成される。そして、この薄板軽量形鋼製の枠材は、１ｍｍ前後の板厚の薄鋼板をロールフォーミングにより溝形、リップ付き溝形、ボックス形等に形成し、巾寸法なども所定の仕様に合わせて成形することにより構成される。
【０００４】
図９〜図１２によって、従来のスチールハウス工法による枠組み構造を説明する。下枠材１から複数の立て枠材２が所定の間隔をあけて立ち上がっており、各立て枠材２の上端の間は上枠材３で結合されていて、この下枠材１と立て枠材２と上枠材３で構成される壁枠材に構造用面材６（図１２に示す）またはブレースを取付けて耐力壁パネル７が構成されている。建物には出入り口８ａ、窓８ｂなどの開口部８が形成される。
【０００５】
耐力壁７の上枠材３には、側根太５ａと端根太５ｂが支持されていて、両根太が矩形に組まれている。そして、側根太５ａと平行して長短複数の床根太１０が所定間隔で設けられていて、長尺の床根太１０の両端は前後の端根太５ｂに受け金物１１を介して結合され、短尺の床根太１０の一端は前側又は後側の端根太５ｂに、他端は床梁１２にそれぞれ受け金物１１を介して結合されている。床梁１２の一端は側根太５ａに、他端は長尺の床根太１０に受け金物１１を介して結合されている。床根太１０に合板等の構造用面材１３を敷き詰めて床パネル１４が構成される。図９において、１０ａは床開口部端根太、１０ｂは開口部側根太、１０ｃは根太受け金物、１０ｄはころび止めである。
【０００６】
前記ＳＨ工法の建物おいて、出入り口８ａ、窓８ｂなどの開口部８には立て枠材２が存在しないことから、この開口部８においては、屋根等の上階からの鉛直荷重を支える柱がなく、開口部８の部位は強度的に弱くなる。このため、当該開口部８の上部を補強する必要があり、開口部８の上にまぐさ１５を設ける。
【０００７】
図７に示すように、窓８ｂのまぐさ１５の上下に上枠材３とまぐさ枠材１７が設けられ、まぐさ枠材１７と窓上枠材１８の間に開口部上枠材１９が設けられ、まぐさ１５の両端がまぐさ受け２０にまぐさ受け金物２１を介して取付けられ、まぐさ受け取付け立て枠２２は、耐力壁７の端部の立て枠材２にドリルビス２３で接合されている。２４は窓台、２４ａは窓台受け、２５は開口部下枠材である。
【０００８】
図１１には、図９のＳＨ工法による架構を建物の１階部２７として、その上に２階部２８を載せた建物の開口部８の概要図、図１２は図１１のＡ−Ａ断面図を示し、各図は、まぐさ１５と端根太５ｂと床根太１０との取合い構造を示している。薄板軽量溝形鋼からなる端根太５ｂには、受け金物１１を取付けた床根太１０の端部が接合されている。受け金物１１は、リップ付き薄板軽量溝形鋼を短寸に切断し、溝部を立てにして配置されている。端根太５ｂの下側に配置され、この端根太５ｂにドリルビスを用いて接合されるまぐさ１５は、リップ付き薄板軽量溝形鋼１５ａを向かい合わせ、上下の外側を結合枠材１５ｂで結合して構成されている。
【０００９】
前述のスチールハウス（ＳＨ）工法は、薄板軽量形鋼の枠材をドリルビスを用いて接合して建物の壁枠パネルを構築し、この壁枠に構造用面材６を貼り付けた耐力壁パネルで躯体を構築するものであり、そのメリットとして薄板軽量形鋼は、溶接加工を必要とせず、切断、穴あけ加工も簡単で、部材が軽く、人手で運搬できるため、作業効率も高く、製作コストは安価なことである。壁については、耐力壁パネルは安定した製品精度を確保しやすい、パネルの先作り、したがって工期短縮、パネル精度確保により施工が容易、３０〜４０坪程度の規模の場合建て方２．０日などである。このため、２、３階の低層建物の構造分野では経済的な構造である。
【００１０】
【発明が解決しようとする課題】
他方、薄板軽量形鋼を主な架構要素とするスチールハウスには、次の欠点がある。
【００１１】
出入り口や窓など壁面に形成する開口部において、上階からの鉛直荷重を支持するうえで強度が不足するので、前述のまぐさを開口部の上部に設け、このまぐさを介して、開口部に上方から掛かる鉛直荷重を両側耐力壁パネルの立て枠に流している。しかし、まぐさは、屋根、床等、上階からの鉛直荷重を受け止めるだけの強度確保が必要であり、このため、複数の薄板軽量形鋼の組み合わせ部材を使用することになりまぐさの加工や構成が複雑であり、さらに、まぐさの両端は、開口部の両側に位置する耐力壁パネルの側端部に取付けられるので、前記の構成の複雑さとも関係して、まぐさと周辺部材との取付けが複雑であり、さらに、まぐさの存在により開口部の高さ（図１１にｈで示す）に制約を受けるとういう問題があった。
【００１２】
本発明は前記の問題を解決した低層建物の枠組み構造を提供することを目的とする。
【００１３】
すなわち、本発明は、低層建物において、スチールハウスの利点を生かすと共に、重量鉄骨構造を一部取り入れること（これを混構造と定義する）、または、複数の薄板軽量形鋼を接合してなる枠材構造（これを複合構造と定義する）とすることでＳＨ工法の欠点を補う、つまり、前記構成により開口部におけるまぐさを使用せずに、耐力壁パネルの上部に設ける臥梁を介して耐力壁パネルと屋根パネルおよび床パネル又は屋根パネルを接合することで、開口上部のまぐさを無くし、その結果として、まぐさの加工手間と、開口部高さの制約から解放した枠組み構造を提供するものである。
【００１４】
【課題を解決するための手段】
前記の課題を解決するため、本発明は次のように構成する。
【００１５】
請求項１の発明は、薄板軽量形鋼製の枠材に面材又はブレースを取付けて耐力壁パネルを構成し、耐力壁パネルの上部に設けた臥梁によって床根太を支持し、壁には開口部が形成されてなる数階建てのスチールハウスにおいて、前記床根太と平行に開口部が形成された壁面に設けられる臥梁をウェブを鉛直に配置した溝形鋼で構成し、該溝形鋼の溝部には上下のフランジの変形を阻止する補強材を適宜間隔で配置したうえ、溝形鋼の前記ウェブ背面に前記床根太の端部に設けた受け金物を当てがい、その当接部に挿通するボルト締結により溝形鋼製臥梁と耐力壁パネルおよび床根太の間をボルト接合し、前記壁面の開口部は前記臥梁の直下まで開口していることを特徴とするスチールハウス製低層建物の枠組構造である。
【００１６】
請求項２の発明は、薄板軽量形鋼製の枠材に面材又はブレースを取付けて耐力壁パネルを構成し、耐力壁パネルの上部に設けた臥梁によって床根太を支持し、壁には開口部が形成されてなる数階建てのスチールハウスにおいて、前記床根太と平行に開口部が形成された壁面に設けられる臥梁をウェブを鉛直に配置したＨ形鋼で構成し、該Ｈ形鋼のウェブの側面に形成される溝部には上下のフランジの変形を阻止する補強材を適宜間隔に配置したうえ、溝形鋼の前記ウェブ背面に前記床根太の端部に設けた受け金物を当てがい、その当接部に挿通するボルト締結により溝形鋼製臥梁と耐力壁パネルおよび床根太の間をボルト接合し、前記壁面の開口部は前記臥梁の直下まで開口していることを特徴とするスチールハウス製低層建物の枠組構造である。
【００１７】
請求項３の発明は、薄板軽量形鋼製の枠材に面材又はブレースを取付けて耐力壁パネルを構成し、耐力壁パネルの上部に設けた臥梁によって床根太を支持し、壁には開口部が形成されてなる数階建てのスチールハウスにおいて、前記床根太と平行に開口部が形成された壁面に設けられる臥梁をウェブを鉛直に配置した薄板軽量溝形鋼の組合わせ材で構成し、該薄板軽量溝形鋼の溝部には上下のフランジの変形を阻止する補強材を適宜間隔で配置したうえ、前記薄板軽量形鋼の組合わせ材からなる臥梁の溝部に、前記床根太の端部に設けた受け金物を配置し、前記溝形鋼製臥梁と耐力壁パネルおよび床根太の間をボルト接合し、前記壁面の開口部は前記臥梁の直下まで開口していることを特徴とするスチールハウス製低層建物の枠組構造である。
【００１８】
請求項４の発明は、請求項１記載の発明において、前記床根太と直交して開口部が形成された壁面に設けられる臥梁がウェブを鉛直に配置した溝形鋼からなり、前記溝形鋼の上フランジ上面に床根太の端部を載置し、両部材の当接部をボルト接合したことを特徴とする。
【００１９】
請求項５の発明は、請求項２に記載の発明おいて、床根太と直交して開口部が形成された壁面に設けられる臥梁がウェブを鉛直に配置したＨ形鋼からなり、前記Ｈ形鋼の上フランジ上面に床根太の端部を載置し、両部材の当接部をボルト接合したことを特徴とする。
【００２０】
請求項６の発明は、請求項３に記載の発明おいて、床根太と直交して開口部が形成された壁面に設けられる臥梁を構成する薄板軽量形鋼の組合わせ材をウェブが鉛直になるように配置し、前記組合わせ材のそれぞれの上フランジ上面に床根太の端部を当てがい、両部材の当接部をボルト接合したことを特徴とする。
【００２１】
【作用】
本発明により、耐力壁パネルの上部の臥梁をＨ形鋼、溝形鋼等の重量鉄骨または、薄板軽量溝形鋼の組み合わせ材で構成することで、まぐさ部材を省略することが可能となり、低層の建物において、薄板軽量形鋼製の枠材を主要素とするスチールハウス工法の利点、すなわち溶接加工が不要、切断、穴あけ加工も簡単で、部材が軽く、人手で運搬できて作業効率も高く、また、耐力壁パネル及び屋根、床パネル等の工場生産による効率化、安定したパネル精度確保、現場施工の簡略化、容易化、工期短縮、製作コストが安価などの利点を生かしつつ、まぐさ部材の省略による開口部の高さ及び巾等への適応範囲拡大を図ることが可能となる。
【００２２】
【発明の実施の形態】
以下、本発明の実施形態を図を参照して説明する。従来例と同一の要素には、同一符号を付して説明する。
【００２３】
図１は、本発明の実施形態の第１例に係る２階建て建物の概要斜視図で、図５、図６、図７には、第２例、第３例、第４例に係る建物の概要斜視図が示されている。
【００２４】
図１、図５〜図７の各建物において、耐力壁パネル７によって1階２７と２階２８の壁が構成されていて、１階の耐力壁パネル７の上端に沿って配置された側根太５ａおよび端根太５ｂ（両根太を総称して臥梁５という）によって２階２８の耐力壁パネル７が支持されていると共に、臥梁５によって床根太１０が支持されていて、床根太１０に構造用面材（合板）１３を貼り付けて床パネル１４が構成されている。また、図１、図５では、床根太１０と直交した壁面に開口部８が設けられており、図６では床根太１０と平行した壁面に開口部８が設けられている。さらに、図５は、上階に開口部８がない例を、図１、図６は、上階に開口部８がある例を示している。
【００２５】
図７は、耐力壁パネル７の配置例として示す建物の斜視図であり、この耐力壁パネル７は、図８のように構成されている。図８（Ａ）の例では、耐力壁パネル７は、薄板軽量形鋼製の下枠材１と薄板軽量形鋼製の立て枠材２と、薄板軽量形鋼製の上枠材３とで壁枠材が組まれ、これに構造用面材６を貼り付けてドリルビス１９で接合して構成される。図６（Ｂ）の耐力壁パネル７例では、前記下枠材１と立て枠材２と上枠材３を組み付けてなる壁枠材にブレース３０をドリルビス１９や溶接で接合して構成される。本実施形態では、図６（Ａ）、（Ｂ）何れの耐力壁パネル７を用いてもよい。なお、薄板軽量形鋼製の壁枠材に代えて木製枠材と面材（合板）で耐力壁パネル７を構成してもよい。
【００２６】
本発明は前述のＳＨ工法による２、３階の建物において、臥梁５を特殊構造とすることで、開口部８における従来のまぐさを省略することを主目的とするが、この場合、耐力壁パネル７と、臥梁５と、床根太１０との３部材の接合構造が主要構成の一部をなす。図２〜図４には耐力壁パネル７と、臥梁５と、床根太１０との３部材を接合する場合の第１例〜第６例を示している。この６例において、臥梁５を構造面から３例に分けることができ、前記３部材の組み合わせ面から２種類に分けることができ、図にはこれらの合計６例を示している。
【００２７】
図２には、耐力壁パネル７と、臥梁（周辺梁ともいう）５と、床根太１０の３部材の接合の第１例を示し、図３（Ａ）、（Ｂ）には第２例と第３例を示し、図４（Ａ）、（Ｂ）、（Ｃ）には第４例と第５例と第６例を示す。第３例（図３Ｂ）には、開口部８が床根太１０と平行な壁面に配置される場合など、当該壁面に形成される開口部８に掛かる鉛直力、水平力が比較的小さい場合の接合例を示す。第１例、第２例及び第４例〜第６例は、開口部８が床根太１０と直交する壁面に配置される場合など、当該壁面に形成される開口部８に掛かる鉛直力、水平力が比較的大きい場合の接合例を示す。
【００２８】
図２〜図４によって、第１例〜第６例に共通の構成要素を概要的に説明する。
【００３３】
臥梁５は、図２と図４（Ａ）では溝形鋼で構成され、図３（Ａ）と図４（Ｂ）ではＨ形鋼で構成され、図３（Ｂ）と図４（Ｃ）では２つの薄板軽量溝形鋼を背中合わせに接合した組合わせ材で構成されている。また、床根太１０と平行して開口部８が設けられた壁面に設けられる臥梁５にあっては、図２と図３（Ａ）、（Ｂ）に示すように、当該臥梁５の側面に床根太１０がボルト接合される。また、床根太１０と直交して開口部８が設けられた壁面に設けられる臥梁５にあっては、図４（Ａ）、（Ｂ）、（Ｃ）に示すように、当該臥梁５の上面に床根太１０が載置されボルト接合される。
【００２９】
図２〜図４の詳細構造を順に説明する。
【００３０】
図２に示す第１例において、ウエブ３１を垂直配置でかつ溝部を外向きにして配置した溝形鋼からなる臥梁５の下フランジ３２を、耐力壁パネル７の薄板軽量溝形鋼製の上枠材３のウェブ上面に当てがい、ウェブ下面に押え板３３を配置し、この当接部の各部材を挿通して接合ボルト３４を設け、ナット３５を締結することで、耐力壁パネル７と臥梁５を接合する。
【００３１】
溝形鋼製の臥梁５のウエブ背面には、床根太１０の端部に設けた受け金物１１を当てがう。この受け金物１１は、リップ付き薄板軽量溝形鋼を短寸に切断し立て置きで床根太１０の端部に接合されていて、その一側フランジを臥梁５のウエブ背面に当てがい、押え板３３を介して、この当接部に接合ボルト３４を挿通し、ナット３５を締結することで、床根太１０と臥梁５を接合する。溝形鋼製臥梁５の溝部には、補強材３７が設けられている。
【００３２】
床パネル１４は、既述のとおり床根太１０に構造用面材１３を貼り付けて構成されている。臥梁５の上フランジ３６には、上階の耐力壁パネル７の薄板軽量形鋼製の下枠材１が載置され、ボルト接合される。
【００３３】
次に、図３（Ａ）の第２例では、耐力壁パネル７の上端に、ウエブ３１を垂直配置したＨ形鋼からなる臥梁５の下フランジ３２を、耐力壁パネル７の薄板軽量溝形鋼製の上枠材３のウェブ上面に当てがい、ウェブ下面に押え板３３を配置し、この当接部の各部材を挿通して接合ボルト３４を設け、ナット３５を締結することで、耐力壁パネル７と臥梁５を接合する。Ｈ形鋼製の臥梁５のウエブ背面には、床根太１０の端部に設けた受け金物１１を当てがう。その他の構成は、図２の第１例と同じである。
【００３４】
次に、図３（Ｂ）の第３例では、ウエブ３８を背中合わせに接合してなる２つの薄板軽量溝形鋼の組合わせ材で臥梁５を構成し、ウェブ３８を垂直配置した臥梁５の下フランジ３９を、耐力壁パネル７の薄板軽量溝形鋼製の上枠材３のウェブ上面に当てがい、当接部の各部材をボルトやドリルビスを用いて接合し、耐力壁パネル７と臥梁５を接合する。薄板軽量溝形鋼の組合わせ材からなる臥梁５の溝部には、補強材４０が設けられている。その他の構成は、図２の第１例と同じである。
【００３５】
第１例〜第３例において、開口部８（図１に示す）が形成された壁面において、耐力壁パネル７の上には、前記溝形鋼やＨ形鋼等の鉄骨製又は、薄板軽量溝形鋼の組合わせ材からなる剛性の高い臥梁５が設けられるので、この臥梁５に従来のまぐさ機能を兼用させても何ら問題なく、したがって、従来のスチールハウス工法における開口部のまぐさを省略しても、上階の鉛直荷重や、水平力を十分支持できる。また、この第１例〜第３例では、開口部８が床根太１０と平行配置の壁に設けられる臥梁５が支持する鉛直力、水平力は、直角配置の場合に比べ、比較的小さいので臥梁５の側面に根太１０の端部を接合しても十分な支持力を確保できる。
【００３６】
次に、図４（Ａ）、（Ｂ）、（Ｃ）は、床根太１０と直交配置の開口部８が設けられた壁面における耐力壁パネル７上の臥梁５と、前記床根太１０の第４、第５、第６の接合例を示し、いずれも臥梁５の上部に床根太１０の端部が載置され、ボルト接合されている。また、図４（Ａ）、（Ｂ）、（Ｃ）に示す臥梁５は、それぞれ図２、図３（Ａ）、（Ｂ）の臥梁５と同一構造で、耐力壁パネル７の上端部との接合構造もそれらと同じである。床根太１０の構成も図２、図３（Ａ）、（Ｂ）と同じである。
【００３７】
さらに説明すると、図４（Ａ）では、床根太１０端部の薄板軽量溝形鋼製の端根太５ｂが溝形鋼の臥梁５の上フランジ３６の上面に載置され、上フランジ３６と薄板軽量溝形鋼と押え板３３との接合部を挿通して接合ボルト３４が設けられ、ナット３５を締結することで臥梁５と床根太１０とが接合される。床根太１０の上面に貼り付けられた構造用面材６の端部上面には、上階の耐力壁パネル７の薄板軽量溝形鋼製の下枠材１が載置され、ボルト接合されている。
【００３８】
図４（Ｂ）では、床根太１０端部の薄板軽量溝形鋼製の端根太５ｂがＨ形鋼の臥梁５の上フランジ３６の上面に載置され、上フランジ３６と薄板軽量溝形鋼と押え板３３との接合部を挿通して接合ボルト３４が設けられ、ナット３５を締結することで臥梁５と床根太１０とが接合される。床根太１０の上面に貼り付けられた構造用面材６の端部上面には、上階の耐力壁パネル７の薄板軽量溝形鋼製の下枠材１が載置され、ボルト接合されている。
【００３９】
図４（Ｃ）では、床根太１０端部の薄板軽量溝形鋼製の端根太５ｂが薄板軽量溝形鋼の組合わせ材からなる臥梁５の上フランジ３６の上面に載置され、上フランジ３６と薄板軽量溝形鋼と押え板３３との接合部を挿通して接合ボルト３４が設けられ、ナット３５を締結することで臥梁５と床根太１０とが接合される。端根太５ｂの外側面には薄板軽量溝形鋼製の補強枠４１が設けられると共に、床根太１０の上面に貼り付けられた構造用面材６の端部上面には、上階の耐力壁パネル７の薄板軽量溝形鋼製の下枠材１が載置され、ボルト接合されている。
【００４０】
第４例〜第６例においても、開口部８（図８に示す）が形成された壁面において、耐力壁パネル７の上には、前記溝形鋼やＨ形鋼等の鉄骨製又は、薄板軽量溝形鋼の組合わせ材からなる剛性の高い臥梁５が設けられるので、この臥梁５に従来のまぐさ機能を兼用させても何ら問題なく、したがって、従来のスチールハウス工法における開口部のまぐさを省略しても、上階の鉛直荷重や、水平力を十分支持できる。また、この第４例〜第６例では、臥梁５の上部で床根太１０を支持するので、接合ボルト３４にせん断力が掛からず、開口部８が床根太１０と直交配置の壁に設けられる臥梁５が支持する鉛直力や水平力が大きくても十分な支持力を確保できる。
【００４１】
なお、本発明において、各部の構成及び接合材（ボルト、リベット、ドリルビス等）は臥梁に加わる荷重条件に応じて適宜設計変更して実施することができ、このような設計変更的実施は本発明に含まれる。
【００４２】
【発明の効果】
本発明により、耐力壁パネルの上部の臥梁をＨ形鋼、みぞ形鋼等の重量鉄骨または、薄板軽量形鋼による組み合わせ梁とすることで、まぐさ部材を省略することが可能となり、従来のＳＨ技術の壁パネル及び屋根、床パネル等の工場生産による効率化、現場施工の簡略化を生かしつつ、開口部の高さ及び巾等への適応範囲拡大を図ることが可能となる。
【図面の簡単な説明】
【図１】本発明の実施形態の１例に係る２階建て建物の斜視図である。
【図２】（Ａ）は、図１のＢ−Ｂ線に沿う断面図の第１例の図、（Ｂ）は、（Ａ）の横断平面図である。
【図３】（Ａ）、（Ｂ）は、図１のＢ−Ｂ線に沿う断面図の第２例と第３例の図、（Ｃ）は、図（Ｂ）の臥梁と補強材を示す図である。
【図４】（Ａ）、（Ｂ）、（Ｃ）は、図１のＢ−Ｂ線に沿う断面図の第４例と第５と第６例の図である。
【図５】本発明の実施形態の他の１例に係る２階建て建物の斜視図である。第２実施形態に係るＳＨパネルと周辺梁と大梁の接合関係を示す図である。
【図６】本発明の実施形態の更に他の１例に係る２階建て建物の斜視図である。
【図７】（Ａ）は、本発明の実施形態のさらに他の１例に係る２階建て建物の斜視図である。
【図８】（Ａ）、（Ｂ）は、耐力壁パネルの２例の斜視図である。
【図９】スチールハウスの１階部分の枠組みの斜視図である。
【図１０】（Ａ）、（Ｂ）は、窓枠の分解斜視図と組み立て後の斜視図である。
【図１１】従来例として示すスチールハウス工法による低層建物の斜視図である。
【図１２】図１１のＡ−Ａ断面図である。
【符号の説明】
１下枠材
２立て枠材
３上枠材
５臥梁
５ａ側根太
５ｂ端根太
６構造用面
７耐力壁パネル
８開口部
８ａ出入り口
８ｂ窓
１０床根太
１１受け金物
１２床梁
１３構造用面材
１４床パネル
１５まぐさ
１６まぐさ受け金物
１７まぐさ枠材
１９開口部上枠材
２０まぐさ受け
２１まぐさ受け金物
２２まぐさ受け取付け枠材
２３ドリルビス
２４窓台
２５開口部下枠材
２７１階
２８２階
３０ブレース
３１ウェブ
３２下フランジ
３３押え板
３４接合ボルト
３５ナット
３６上フランジ
３７補強材
３８ウェブ
３９下フランジ
４０補強材
４１補強枠[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a steel house (a steel-based panel structure including a frame member made of a thin lightweight steel plate having a thickness of about 1 mm and a structural panel member) which is a low-rise building having two floors and three floors and having a large opening. Building is defined as a steel house).
[0002]
[Prior art]
Conventionally, a steel frame construction method has been mainly used as a construction method adopted for a low-rise building, but recently, a steel house (SH) construction method is becoming widespread in low-rise buildings having two or three floors.
[0003]
As mentioned above, steel houses are made of thin lightweight steel frames as the main structural elements of the entire building, and if necessary, wooden frames and plywood facings are partially assembled into thin lightweight steel frames. It is configured together. This thin sheet lightweight frame steel frame material is formed by rolling a thin steel sheet with a thickness of about 1 mm into a groove shape, a groove shape with lip, a box shape, etc. It is formed by molding.
[0004]
The frame structure by the conventional steel house method will be described with reference to FIGS. A plurality of upright frame members 2 stand up from the lower frame member 1 at predetermined intervals, and an upper frame member 3 joins between upper ends of the respective upright frame members 2. A structural wall member 6 (shown in FIG. 12) or a brace is attached to a wall frame member composed of the member 2 and the upper frame member 3 to form a load-bearing wall panel 7. An opening 8 such as a doorway 8a and a window 8b is formed in the building.
[0005]
The side joist 5a and the end joist 5b are supported on the upper frame member 3 of the load-bearing wall 7, and both joists are assembled in a rectangular shape. A plurality of long and short floor joists 10 are provided at predetermined intervals in parallel with the side joists 5a, and both ends of the long floor joists 10 are connected to front and rear end joists 5b via receiving hardwares 11 to form short joists. One end of the floor joist 10 is connected to the front or rear end joist 5b, and the other end is connected to the floor beam 12 via the receiving hardware 11. One end of the floor beam 12 is connected to the side joist 5 a, and the other end is connected to the long floor joist 10 via the receiving hardware 11. A floor panel 14 is formed by laying structural floor members 13 such as plywood on the floor joist 10. In FIG. 9, 10a is an end joist of a floor opening, 10b is an opening side joist, 10c is a joist receiving metal, and 10d is an anti-roll.
[0006]
In the building using the SH method, since the upright frame member 2 does not exist in the openings 8 such as the doorway 8a and the window 8b, the columns supporting the vertical load from the upper floor such as the roof are formed in the opening 8. However, the strength of the portion of the opening 8 is reduced. Therefore, it is necessary to reinforce the upper part of the opening 8, and the lintel 15 is provided on the opening 8.
[0007]
As shown in FIG. 7, the upper frame member 3 and the lintel frame member 17 are provided above and below the lintel 15 of the window 8b, and the opening upper frame member 19 is provided between the lintel frame member 17 and the window upper frame member 18. Is provided, and both ends of the lintel 15 are attached to the lintel support 20 via the lintel receiving hardware 21. The lintel support mounting frame 22 is attached to the frame 2 at the end of the load-bearing wall 7 with a drill screw 23. Are joined. 24 is a window stand, 24a is a window stand receiver, and 25 is an opening lower frame material.
[0008]
FIG. 11 is a schematic view of the opening 8 of the building in which the frame by the SH method in FIG. 9 is the first floor 27 of the building and the second floor 28 is placed thereon, and FIG. Drawings are shown, and each figure shows an assembling structure of the lintel 15, the end joist 5b, and the floor joist 10. The end portion of the floor joist 10 to which the receiving metal 11 is attached is joined to the end joist 5b made of a thin lightweight grooved steel. The receiving metal member 11 is arranged by cutting a thin, lightweight grooved steel plate with a lip into short dimensions and setting the groove portion upright. The lintel 15 which is arranged below the end joist 5b and which is joined to the end joist 5b using a drill screw, faces a thin lightweight grooved steel plate 15a with a lip, and connects the upper and lower outer sides with a joining frame member 15b. It is configured.
[0009]
In the above-mentioned steel house (SH) method, a thin-walled lightweight steel frame material is joined using drill screws to construct a wall frame panel of a building, and a load-bearing wall panel in which a structural face material 6 is adhered to the wall frame. As a merit, thin and lightweight shaped steel does not require welding, is easy to cut and drill, is lightweight, can be transported by hand, and has high working efficiency and high manufacturing cost. Is cheap. Regarding walls, load-bearing wall panels are easy to secure stable product accuracy, pre-fabrication of panels, therefore shortening the construction period, easy to install by ensuring panel accuracy, etc. For a scale of about 30 to 40 tsubo, build method 2.0 days, etc. It is. For this reason, it is an economical structure in the structural field of low-rise buildings on the second and third floors.
[0010]
[Problems to be solved by the invention]
On the other hand, a steel house using a thin lightweight steel as a main structural element has the following disadvantages.
[0011]
At the opening formed on the wall surface such as an entrance or a window, the strength is insufficient to support the vertical load from the upper floor, so the above-mentioned lintel is provided above the opening, and through this lintel, the opening is formed. The vertical load applied from above is flowing to the standing frames of the load bearing wall panels on both sides. However, lintels must be strong enough to receive vertical loads from roofs, floors, and other upper floors. And the configuration is complicated, and furthermore, since both ends of the lintel are attached to the side ends of the load-bearing wall panels located on both sides of the opening, the lintel and the peripheral members are related to the complexity of the configuration described above. However, there is a problem that the height of the opening (shown by h in FIG. 11) is restricted by the presence of the lintel.
[0012]
An object of the present invention is to provide a frame structure of a low-rise building which solves the above-mentioned problem.
[0013]
That is, the present invention makes use of the advantages of a steel house in a low-rise building and partially incorporates a heavy steel frame structure (this is defined as a mixed structure), or a frame formed by joining a plurality of thin lightweight steel plates. The material structure (this is defined as a composite structure) compensates for the drawbacks of the SH method. That is, the above structure does not use the lintel at the opening, but through the ridge provided above the load-bearing wall panel. By joining the load-bearing wall panel with the roof panel and the floor panel or roof panel, the lintel at the top of the opening is eliminated, and as a result, the lintel processing time and the framework structure free from the restriction of the opening height are provided. Is what you do.
[0014]
[Means for Solving the Problems]
In order to solve the above problem, the present invention is configured as follows.
[0015]
According to the first aspect of the present invention, a load-bearing wall panel is formed by attaching a face material or a brace to a thin-plate lightweight steel frame material, and a floor joist is supported by a beam provided above the load-bearing wall panel. In a several-story steel house having an opening formed therein, a ridge provided on a wall surface having an opening formed in parallel with the floor joist is formed of a channel steel in which a web is vertically arranged, and Reinforcing materials for preventing deformation of the upper and lower flanges are arranged at appropriate intervals in the steel groove, and a metal fitting provided at the end of the floor joist is applied to the back surface of the web of the channel steel, and the contact portion thereof A bolted bolt is inserted between the grooved steel beam and the load-bearing wall panel and the floor joist to form a bolt, and the opening of the wall surface is open to just below the beam. It is a frame structure of a low-rise building.
[0016]
The invention according to claim 2 provides a load-bearing wall panel by attaching a face material or a brace to a frame member made of a thin and lightweight section steel , supporting a floor joist by a girder provided above the load-bearing wall panel, In a several-storey steel house having an opening formed therein, a beam provided on a wall surface having an opening formed in parallel with the floor joist is formed of an H-shaped steel in which a web is disposed vertically, and the H-shaped steel is provided. In the groove formed on the side surface of the steel web, reinforcing materials for preventing deformation of the upper and lower flanges are arranged at appropriate intervals, and a receiving metal provided at the end of the floor joist on the back of the web of the channel steel. Fitting, bolt connection between the grooved steel girder and the load-bearing wall panel and the floor joist by bolt fastening inserted into the abutting part, and the opening of the wall surface is opened to just below the girder Characterized by a steel house low-rise building frame structure That.
[0017]
The invention according to claim 3 provides a load-bearing wall panel by attaching a face material or a brace to a frame member made of a thin and lightweight section steel , supporting the floor joist by a beam provided above the load-bearing wall panel, In a several-story steel house having an opening formed therein, a lie beam provided on a wall surface having an opening formed in parallel with the floor joist is made of a combination of thin lightweight grooved steel in which webs are vertically arranged. The reinforcing member for preventing deformation of the upper and lower flanges is arranged at appropriate intervals in the groove portion of the thin sheet-shaped lightweight steel section, and the floor section is formed in the groove section of the beam made of a combination material of the thin sheet-shaped lightweight section steel sheet. A metal fitting provided at the end of the joist is arranged, and the groove-shaped steel girder, the load-bearing wall panel and the floor joist are bolted together, and the opening of the wall surface is open to just below the girder. Characterized by a frame structure of a low-rise building made of a steel house.
[0018]
According to a fourth aspect of the present invention, in the first aspect of the invention, the cross beam provided on a wall surface having an opening perpendicular to the floor joist is formed of a channel steel in which a web is disposed vertically, and The end of the floor joist is placed on the upper surface of the steel upper flange, and the abutting portions of both members are bolted.
[0019]
According to a fifth aspect of the present invention, in the second aspect, the lying beam provided on the wall surface having an opening perpendicular to the floor joist is made of an H-section steel having a web arranged vertically. The end portion of the floor joist is placed on the upper surface of the upper flange of the section steel, and the abutting portion of both members is bolted.
[0020]
According to a sixth aspect of the present invention, in the third aspect of the present invention, the web is made of a combination of thin and light-weight steels constituting a berth provided on a wall surface having an opening perpendicular to the floor joist. , The end of the floor joist is applied to the upper surface of the upper flange of each of the combination members, and the contact portions of both members are bolted.
[0021]
[Action]
According to the present invention, it is possible to omit the lintel member by forming the upper beam of the load-bearing wall panel with a heavy steel frame such as an H-section steel, a channel steel or the like, or a combination of a thin sheet lightweight channel steel. In low-rise buildings, the advantages of the steel house construction method, which is mainly made of thin and lightweight steel frame material, are unnecessary: welding is unnecessary, cutting and drilling are easy, the members are light, and they can be transported by hand and work efficiency It is also high, and it takes advantage of such advantages as efficiency through factory production of load-bearing wall panels and roofs, floor panels, etc. By omitting the lintel member, it is possible to expand the applicable range to the height and width of the opening.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same elements as those in the conventional example will be described with the same reference numerals.
[0023]
FIG. 1 is a schematic perspective view of a two-story building according to a first example of the embodiment of the present invention, and FIGS. 5, 6, and 7 show buildings according to the second, third, and fourth examples. Is shown in a schematic perspective view.
[0024]
In each of the buildings shown in FIGS. 1, 5 to 7, the walls on the first floor 27 and the second floor 28 are constituted by the load-bearing wall panels 7, and the lateral joists are arranged along the upper end of the load-bearing wall panel 7 on the first floor. The load-bearing wall panel 7 on the second floor 28 is supported by 5a and the end joists 5b (both joists are collectively referred to as the joists 5), and the joists 5 support the floor joists 10. A floor panel 14 is formed by attaching a structural surface material (plywood) 13. 1 and 5, an opening 8 is provided on a wall surface orthogonal to the floor joist 10, and in FIG. 6, an opening 8 is provided on a wall surface parallel to the floor joist 10. Further, FIG. 5 shows an example where there is no opening 8 on the upper floor, and FIGS. 1 and 6 show an example where there is an opening 8 on the upper floor.
[0025]
FIG. 7 is a perspective view of a building shown as an example of the arrangement of the load-bearing wall panels 7, and the load-bearing wall panels 7 are configured as shown in FIG. In the example of FIG. 8A, the load-bearing wall panel 7 is composed of a lower frame member 1 made of a thin, lightweight section steel, an upright frame member 2 made of a thin, lightweight section steel, and an upper frame member 3 made of a thin, lightweight section steel. A wall frame material is assembled, and the structural face material 6 is attached to the wall frame material and joined with a drill screw 19. In the example of the load-bearing wall panel 7 shown in FIG. 6B, a brace 30 is joined to a wall frame material obtained by assembling the lower frame material 1, the upright frame material 2, and the upper frame material 3 with a drill screw 19 or welding. . In the present embodiment, any of the load-bearing wall panels 7 shown in FIGS. 6A and 6B may be used. It should be noted that the load-bearing wall panel 7 may be constituted by a wooden frame material and a face material (plywood) in place of the wall frame material made of a thin and lightweight shaped steel.
[0026]
The main object of the present invention is to omit the conventional lintel at the opening 8 by using the special structure of the girder 5 in the second and third floor buildings by the above-mentioned SH method. The joint structure of the three members of the wall panel 7, the girder 5, and the floor joist 10 forms a part of the main configuration. FIGS. 2 to 4 show first to sixth examples in which three members, the load-bearing wall panel 7, the lying beam 5, and the floor joist 10 are joined. In these six examples, the lying beam 5 can be divided into three examples from the structural aspect, and can be divided into two types from the combination aspect of the three members. The figure shows a total of six examples.
[0027]
FIG. 2 shows a first example of joining of three members, a load-bearing wall panel 7, a lying beam (also referred to as a peripheral beam) 5, and a floor joist 10 , and FIGS. 3A and 3B show a second example. Examples and a third example are shown, and FIGS. 4A, 4B, and 4C show a fourth example, a fifth example, and a sixth example. In the third example (FIG. 3B), the case where the vertical force and the horizontal force applied to the opening 8 formed on the wall surface are relatively small, such as when the opening 8 is arranged on a wall surface parallel to the floor joist 10. An example of joining will be described. In the first example, the second example, and the fourth to sixth examples, when the opening 8 is arranged on a wall surface orthogonal to the floor joist 10, the vertical force acting on the opening 8 formed on the wall surface and the horizontal force An example of joining when the force is relatively large is shown.
[0028]
2 to 4, components common to the first to sixth examples will be schematically described.
[0033]
2 and 4 (A) are formed of a channel steel, while FIGS. 3 (A) and 4 (B) are formed of an H-shaped steel, and FIGS. 3 (B) and 4 (C). ) Is composed of a combined material in which two thin, lightweight channel steels are joined back to back. As shown in FIGS. 2 and 3A and 3B, the strut 5 provided on the wall surface provided with the opening 8 in parallel with the floor joist 10. The floor joist 10 is bolted to the side surface. In addition, as shown in FIGS. 4A, 4B, and 4C, the strut 5 provided on the wall surface provided with the opening 8 at right angles to the floor joist 10. The floor joist 10 is placed on the upper surface of the base and is bolted.
[0029]
The detailed structure of FIGS. 2 to 4 will be described in order.
[0030]
Oite the first example shown in FIG. 2, the lower flange 32 of Wo beam 5 comprising the a and the groove of the web 31 vertically disposed from channel steel that is disposed outwardly, thin plate bearing wall panels 7 weight interposition steel A press plate 33 is arranged on the upper surface of the upper frame member 3 made of steel, and a holding plate 33 is arranged on the lower surface of the web. The panel 7 and the beam 5 are joined.
[0031]
The metal fitting 11 provided at the end of the floor joist 10 is applied to the back surface of the web of the channel steel beam 4. The receiving metal fitting 11 is formed by cutting a thin, lightweight grooved steel lip with a short length and joining it to the end of the floor joist 10 by standing upright. The connecting bolt 34 is inserted into the contact portion via the plate 33 and the nut 35 is fastened to join the floor joist 10 and the joist 5. A reinforcing member 37 is provided in the groove of the grooved steel beam 5.
[0032]
The floor panel 14 is configured by attaching the structural face material 13 to the floor joist 10 as described above. The lower frame member 1 made of a thin, light-weight steel plate of the load-bearing wall panel 7 on the upper floor is mounted on the upper flange 36 of the beam 5 and is bolted.
[0033]
Next, in the second example of FIG. 3A, the lower flange 32 of the H-beam 5 made of H-shaped steel on which the web 31 is vertically arranged is attached to the upper end of the load-bearing wall panel 7 by a thin plate light-weight groove of the load-bearing wall panel 7. By applying a pressing plate 33 to the upper surface of the web of the upper steel frame member 3 made of shaped steel, arranging a pressing plate 33 on the lower surface of the web, inserting each member of this abutting portion to provide a joining bolt 34, and fastening a nut 35, The load-bearing wall panel 7 and the beam 5 are joined. The receiving metal 11 provided at the end of the floor joist 10 is applied to the back of the web of the H-shaped steel beam 5. Other configurations are the same as those of the first example in FIG.
[0034]
Next, in a third example shown in FIG. 3B, the ligament 5 is made of a combination of two thin, lightweight grooved steel members joined together back to back with webs 38, and the ligaments with the webs 38 arranged vertically. 5, the lower flange 39 is applied to the upper surface of the web of the upper frame member 3 made of the thin lightweight grooved steel of the load-bearing wall panel 7, and each member at the contact portion is joined using bolts or drill screws. And the beam 5 are joined. A reinforcing member 40 is provided in a groove of the beam 5 made of a combination of thin and lightweight channel steel. Other configurations are the same as those of the first example in FIG.
[0035]
In the first to third examples, on the wall surface on which the opening 8 (shown in FIG. 1) is formed, on the load-bearing wall panel 7, a steel frame such as the channel steel or the H-section steel or a thin plate is used. Since the rigid berth 5 made of a combination material of a channel steel is provided, there is no problem even if this berth 5 is made to also have the conventional lintel function. Even if the lintel is omitted, the vertical load on the upper floor and the horizontal force can be sufficiently supported. Further, in the first to third examples, the vertical force and the horizontal force supported by the lying beam 5 in which the opening 8 is provided on the wall arranged in parallel with the floor joist 10 are relatively small as compared with the case of the right angle arrangement. Therefore, even if the end of the joist 10 is joined to the side surface of the joist 5, a sufficient supporting force can be secured.
[0036]
Next, FIGS. 4 (A), (B) and (C) show the joist 5 on the load-bearing wall panel 7 on the wall surface provided with the opening 8 orthogonal to the floor joist 10 and the floor joist 10. The fourth, fifth, and sixth joining examples are shown, and the end of the floor joist 10 is placed on the upper part of the beam 5 and is bolted. 4 (A), 4 (B) and 4 (C) have the same structure as that of FIGS. 2, 3 (A) and 3 (B), respectively. The joint structure with the part is the same as them. The configuration of the floor joist 10 is the same as that shown in FIGS. 2, 3A and 3B.
[0037]
4A, an end joist 5b made of a thin sheet-shaped lightweight channel steel at the end of the floor joist 10 is placed on the upper surface of the upper flange 36 of the grooved steel beam 5. A joining bolt 34 is provided through a joining portion between the thin lightweight channel steel and the holding plate 33, and the joist 5 and the floor joist 10 are joined by fastening a nut 35. On the upper surface at the end of the structural panel 6 attached to the upper surface of the floor joist 10, the lower frame member 1 made of a thin, lightweight channel steel of the load-bearing wall panel 7 on the upper floor is placed and bolted. I have.
[0038]
In FIG. 4B, an end joist 5b made of a thin lightweight grooved steel at the end of the floor joist 10 is placed on the upper surface of the upper flange 36 of the H-shaped steel beam 5, and the upper flange 36 and the thin lightweight grooved shape are mounted. A joint bolt 34 is provided through a joint between the steel and the holding plate 33, and the joist 5 and the floor joist 10 are joined by fastening a nut 35. On the upper surface at the end of the structural panel 6 attached to the upper surface of the floor joist 10, the lower frame member 1 made of a thin, lightweight channel steel of the load-bearing wall panel 7 on the upper floor is placed and bolted. I have.
[0039]
In FIG. 4C, an end joist 5b made of a thin lightweight channel steel at the end of the floor joist 10 is placed on the upper surface of the upper flange 36 of the beam 5 made of a combination material of the thin lightweight channel steel. A joining bolt 34 is provided through a joint between the flange 36, the thin lightweight channel steel and the holding plate 33, and the nut 35 is fastened to join the beam 5 and the floor joist 10. A reinforcing frame 41 made of a thin lightweight grooved steel is provided on the outer surface of the end joist 5b, and a load bearing wall of the upper floor is provided on the upper surface of the end of the structural panel 6 attached to the upper surface of the floor joist 10. The lower frame member 1 made of a thin, lightweight channel steel of the panel 7 is placed and joined by bolts.
[0040]
Also in the fourth to sixth examples, on the wall surface on which the opening 8 (shown in FIG. 8) is formed, on the load-bearing wall panel 7, a steel plate such as the channel steel or the H-section steel or a thin plate is used. Since the high rigidity girder 5 made of a combination material of lightweight channel steel is provided, there is no problem even if this girder 5 is made to also have the conventional lintel function. Even if the lintel is omitted, the vertical load on the upper floor and the horizontal force can be sufficiently supported. In the fourth to sixth examples, the floor joist 10 is supported at the upper part of the joist 5, so that no shearing force is applied to the joining bolt 34, and the opening 8 is provided in a wall orthogonal to the floor joist 10. Even if the vertical force or horizontal force supported by the lying beam 5 is large, sufficient supporting force can be secured.
[0041]
In the present invention, the configuration of each part and the joining materials (bolts, rivets, drill screws, etc.) can be appropriately changed in design according to the load conditions applied to the girder. Included in the invention.
[0042]
【The invention's effect】
According to the present invention, it is possible to omit the lintel member by forming the upper beam of the load-bearing wall panel as a heavy beam such as an H-section steel, a grooved section steel, or a combination beam using a thin sheet lightweight section steel. It is possible to expand the range of application to the height and width of the opening while making efficient use of the SH technology of wall panels, roofs, floor panels, and other factories and simplifying on-site construction.
[Brief description of the drawings]
FIG. 1 is a perspective view of a two-story building according to an example of an embodiment of the present invention.
FIG. 2A is a diagram of a first example of a cross-sectional view taken along line BB of FIG. 1, and FIG. 2B is a cross-sectional plan view of FIG.
FIGS. 3A and 3B are second and third examples of a cross-sectional view taken along the line BB of FIG. 1, and FIG. 3C is a cross beam and a reinforcing member of FIG. FIG.
FIGS. 4A, 4B, and 4C are diagrams of a fourth example, a fifth example, and a sixth example of a cross-sectional view taken along line BB of FIG. 1;
FIG. 5 is a perspective view of a two-story building according to another example of the embodiment of the present invention. It is a figure showing the joining relation of the SH panel concerning a 2nd embodiment, a peripheral beam, and a girder.
FIG. 6 is a perspective view of a two-story building according to still another example of the embodiment of the present invention.
FIG. 7A is a perspective view of a two-story building according to still another example of the embodiment of the present invention.
FIGS. 8A and 8B are perspective views of two examples of load-bearing wall panels.
FIG. 9 is a perspective view of a framework of a first floor portion of the steel house.
FIGS. 10A and 10B are an exploded perspective view of a window frame and a perspective view after assembly.
FIG. 11 is a perspective view of a low-rise building by a steel house method shown as a conventional example.
FIG. 12 is a sectional view taken along line AA of FIG. 11;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower frame material 2 Stand frame material 3 Upper frame material 5 Lying beam 5a Side joist 5b End joist 6 Structural surface 7 Load-bearing wall panel 8 Opening 8a Doorway 8b Window 10 Floor joist 11 Receiving hardware 12 Floor beam 13 Structural surface material 14 floor panel 15 lintel 16 lintel support 17 lintel frame 19 opening upper frame 20 lintel 21 lintel support 22 lintel mount frame 23 drill screw 24 window sill 25 lower window lower 271 Floor 28 Second floor 30 Brace 31 Web 32 Lower flange 33 Holding plate 34 Joint bolt 35 Nut 36 Upper flange 37 Reinforcement 38 Web 39 Lower flange 40 Reinforcement 41 Reinforcement frame

Claims

A face material or a brace is attached to a thin lightweight steel frame to form a load-bearing wall panel, the floor joist is supported by a beam provided above the load-bearing wall panel, and an opening is formed in the wall. In a steel storey of several floors, a beam provided on a wall having an opening formed in parallel with the floor joist is formed of a channel steel in which a web is vertically arranged, and a vertical portion is formed in a groove of the channel steel. Reinforcing members for preventing deformation of the flange are arranged at appropriate intervals, and a metal fitting provided at the end of the floor joist is applied to the back surface of the web of the channel steel, and the groove is formed by bolting which is inserted into the contact portion. A frame structure for a steel house low-rise building, wherein a bolt is formed between the shaped steel beam and the load-bearing wall panel and the floor joist, and an opening of the wall surface is opened to a position directly below the beam.

A face material or a brace is attached to a thin lightweight steel frame to form a load-bearing wall panel, the floor joist is supported by a beam provided above the load-bearing wall panel, and an opening is formed in the wall. In a multi-storey steel house, a beam provided on a wall surface having an opening formed in parallel with the floor joist is formed of an H-shaped steel in which a web is disposed vertically, and formed on a side surface of the web of the H-shaped steel. In the groove to be formed, reinforcing materials for preventing deformation of the upper and lower flanges are arranged at appropriate intervals, and a metal fitting provided at the end of the floor joist is applied to the back surface of the web of the channel steel, and the contact portion thereof A bolted bolt is inserted between the grooved steel beam and the load-bearing wall panel and the floor joist to form a bolt, and the opening of the wall surface is open to just below the beam. Frame structure of low-rise building.

A face material or a brace is attached to a thin lightweight steel frame to form a load-bearing wall panel, the floor joist is supported by a beam provided above the load-bearing wall panel, and an opening is formed in the wall. In a multi-storey steel house, a beam provided on a wall surface having an opening formed in parallel with the floor joist is composed of a combination of thin lightweight grooved steel in which webs are vertically arranged, and the thin lightweight groove is provided. Reinforcing members for preventing deformation of the upper and lower flanges were arranged at appropriate intervals in the groove of the section steel, and provided at the end of the floor joist in the groove of the beam made of a combination of the thin and lightweight section steel. A steel house, comprising a receiving metal member, and bolt-joining between the grooved steel beam and the load-bearing wall panel and the floor joist, and an opening of the wall surface is opened directly below the beam. Frame structure of low-rise building.

2. The floor joist according to claim 1, wherein the beam provided on the wall surface having an opening perpendicular to the floor joist is made of a channel steel having a web arranged vertically, and an end of the floor joist on the upper flange upper surface of the channel joist. And a contact portion of both members is bolted to the frame structure of a low-rise building.

5. The beam as claimed in claim 2, wherein the beam provided on the wall surface having an opening perpendicular to the floor joist is made of an H-shaped steel having a web arranged vertically, and is provided on an upper flange upper surface of the H-shaped steel. A frame structure for a low-rise building, wherein an end of a floor joist is placed and a contact portion of both members is bolted.

4. The combination material according to claim 3, wherein a combination of thin and light-weight steels forming a beam to be provided on a wall surface having an opening perpendicular to the floor joist is arranged so that the web is vertical. The frame structure of a low-rise building, characterized in that the end of the floor joist is applied to the upper surface of each upper flange, and the contact portions of both members are bolted.