JP3711201B2

JP3711201B2 - Building roof structure

Info

Publication number: JP3711201B2
Application number: JP26942198A
Authority: JP
Inventors: 良道河合; 潤清水
Original assignee: Nippon Steel Corp
Current assignee: Nippon Steel Corp
Priority date: 1998-09-24
Filing date: 1998-09-24
Publication date: 2005-11-02
Anticipated expiration: 2018-09-24
Also published as: JP2000096761A

Description

【０００１】
【発明の属する技術分野】
本発明は建築物の屋根構造に係り、大屋根と小屋根が接合する、平面形状がＬ形，Ｔ形等の屋根において、前記大屋根と小屋根の接合部の支持構造に特長がある建築物の屋根構造に関するもので、特に、溝形鋼を枠材として用いた鋼製建築物に適した屋根構造に関する。
【０００２】
【従来の技術】
図９（Ａ），（Ｂ），（Ｃ），（Ｄ）に示すように、大屋根（本体屋根）１と小屋根２とが接合されて平面がＬ形（Ｔ形の例は図示せず）をなす屋根が知られている。図（Ａ）は大屋根１が切妻で小屋根２が寄棟の例、図（Ｂ）は大屋根１と小屋根２の両方が寄棟の例、図（Ｃ）は大屋根１と小屋根２の両方が切妻の例、図（Ｄ）は大屋根が寄棟で、小屋根２が切妻の例を示す。
【０００３】
図１０〜図１５は、前述のような大屋根１と小屋根２が平面Ｌ形に接合された屋根における架構構造を示す。大屋根１における両妻方向に複数の大屋根受けトラス３が平行に配設されて大屋根が形成され、その妻方向端部に位置する大屋根受けトラス３に対し、小屋根２の屋根受け台形トラス４が直角配置で設けられる
。
【０００４】
大屋根１が支持される大屋根側第１壁５および、これと直角に大屋根側第２壁６が設けられ、大屋根側第１壁５と平行な大屋根側第３壁７の端部壁７ａと、大屋根側第２壁６の端部壁６ａとの開口間隔Ｌの範囲が開口部８とされており、この大屋根側の第２壁６と、第３壁７の各端部壁７ａ，６ａには壁面が外方に出張るよう平面コ字形の小屋根側コ字形壁１０の両側壁１０ａが接続されている（なお、この接続位置にスタッド柱１５が配置されている）。
【０００５】
前記開口間隔Ｌの部位おいて、大屋根１の屋根受けトラス３は、上弦材３０と下弦材１１を山形に組み立て、ラチス材２８、束材２９等で補強してなり、その下弦材１１の一端は、大屋根側の第１壁５の上端で支持されるが、他方側は開口間隔Ｌのため支持される部材がない。このため、開口間隔Ｌにおける大屋根受けトラス３の他端部１２は、小屋根２の台形トラス４のラチス材９又は束材９ａに接合金物１４を介して支持される。
【０００６】
つまり、小屋根２の台形トラス４の下弦材１３の両端は、小屋根側コ字形壁１０の両側壁１０ａで支持されているので、この大屋根受けトラス３の他端部１２が、前記下弦材１３と、上弦材１６と、斜材１７と、ラチス材９を組立ててなる前記小屋根受け台形トラス４の、例えばラチス材９，束材９ａ等の側面に接合金物１４を介して固着することで、前記開口間隔Ｌにおける大屋根受けトラス３の他端部１２の支持構造としている。
【０００７】
しかし、図１５に示すように、小屋根受け台形トラス４の中心軸線Ｏから外れた位置において、当該小屋根受け台形トラス４の側面に大屋根受けトラス３の他端部１２が接合されているので、屋根荷重が大屋根受けトラス３を介して、この他端部１２に作用する（図１５に垂直下向き矢印で示す）とき小屋根受け台形トラス４に偏心作用し、小屋根受け台形トラス４には図１５に円弧矢印で示す回転力が作用する。
【０００８】
【発明が解決しようとする課題】
従来のＬ形，Ｔ形等の屋根構造にあっては、大屋根と小屋根を、同一の台形トラス（つまり、小屋根受け台形トラス）で支持する構造であるため、前記の小屋根受け台形トラスに過大な荷重が作用し、このため小屋根受け台形トラスの各部材が大になり、部材数、接合箇所数が多くなり、その結果、複雑なディテールおよび組立工数増となっていた。また、大屋根の荷重が小屋根受け台形トラスの下弦材に作用するため、この下弦材に回転力が作用するが、この回転力を押さえることが困難で、屋根架構に歪みが発生する欠点があった。
【０００９】
本発明は、前記の欠点に鑑みて、大屋根と小屋根とが接合する部位において、大屋根軒部が開口となる場合に、大屋根荷重と小屋根荷重の支持構造を設計上、明確に分離する構造とすることにより従来の課題を解決したものである。
【００１０】
【課題を解決するための手段】
前記の課題を解決するため、本発明に係る建築物の屋根構造は、複数の大屋根受けトラスによって構成される大屋根と、複数の小屋根受けトラスおよび小屋根受け台形トラスによって構成される小屋根とからなる、平面形状がＬ形，Ｔ形等の屋根構造であって、前記大屋根と小屋根との接合部における大屋根軒部の開口間隔Ｌの開口部に、その両端を当該開口部両側の壁に固着することで組立梁を天井面より下った位置に設置し、この組立梁の上面に前記開口部に設置される大屋根受けトラスの一方の端部を載置すると共に固定金具により固定して支持させて、前記大屋根受けトラスを小屋根受け台形トラスに支持させないようにしたことを特徴とする。
本発明において、前記小屋根は、前記組立梁とは別に前記開口部両側の壁に固着された小屋根受けトラス又は、キングポストトラスに支持されている構成を特徴とする。
また、本発明は、前記開口部の両側に位置する壁に、壁巾に合わせた組立梁用接合金物が固着され、この接合金物に組立梁が接合支持されている構成を特徴とする。
【００１１】
本発明によると、大屋根と小屋根との接合部における大屋根軒部の開口間隔Ｌの開口部において、大屋根受けトラスの一端は、前記開口部に架設された組立梁に支持されるから、大屋根荷重と小屋根荷重は明確に構造分離され、従来のように小屋根受け台形トラスに屋根荷重が作用せず、小屋根受け台形トラスの構成を複雑化，大型化しなくてすみ、さらに小屋根受け台形トラスの下弦材に回転力が作用しない。
【００１２】
【発明の実施の形態】
本発明の実施の形態を図１〜図８を参照して説明する。なお、従来構造と同一要素には同一符号を付して説明を省略する。
【００１３】
本発明の実施形態では、大屋根１と小屋根２とが接合する接合部における大屋根軒部の開口間隔Ｌの開口部８に所定長さで、溝形鋼を組合わせて、断面が長方形のボックス形状とした組立梁１８が天井面より下った位置に設置される。
【００１４】
組立梁１８の両端部は、開口部８の両側位置の壁６ａ，７ａ（より具体的には一方の壁は大屋根側の第２壁６と小屋根側コ字形壁１０の一方の端部とが交わる部位の壁におけるスタッド柱１５の上端部、他方の壁は大屋根側の第３壁７と小屋根側のコ字形壁１０の他方の端部とが交わる部位の壁におけるスタッド柱１５の上端部）に固着される組立梁用接合金物１９で支持される。
【００１５】
組立梁用接合金物１９は、１枚の平鋼板を接合金物展開形状に切断したうえ、所定部位の折曲げ線を介して折り曲げることにより、図６に示すように背面板２０と両側板２１と、底面板２２とで前方と上方が開放の枠形に構成される。この組立梁用接合金物１９は、その背面板２０を開口部８の両側の壁６ａ，７ａに当てがい背面板２０を貫通し、かつ壁６ａ，７ａの位置において、上下方向に伸長するスタッド柱１５の側面に複数のドリルねじ，ボルト，リベット等の固定金具２３を打設することで組立梁用接合金物１９が壁６ａ，７ａに固定される。そして、ボックス形状からなる組立梁１８の両端部を組立梁用接合金物１９の前方と上方の開放部を介して、その内側に挿入支持させ、組立梁用接合金物１９の両側板２１を貫通して組立梁１８の両側面に固定金具２３を打設することで、組立梁１８の両端部が組立梁用接合金物１９に固着される。
【００１６】
図７には組立梁１８の変形例が示されている。この組立梁１８ａは、薄鋼板製のリップを有する内側溝形鋼２４を２本向い合わせ、ボックス断面枠を形成し、このボックス断面枠を両側から抱持するように一対の中間溝形鋼２５を配置して接合し、さらにこの中間溝形鋼２５の上下部に重ねるように外側溝形鋼２６を配置し接合して構成されており、このようにして薄鋼板製溝形鋼の重合により断面強度が向上した断面多重構造の組立枠１８ａが構成された例が示されている。この組立梁１８ａの両端部は、前述と同じ組立梁用接合金物１９で支持されかつ、大屋根受けトラス３の端部を支持するものである。
【００１７】
図８に示すように、大屋根１と小屋根２が接合する開口部８の天井面より下った位置（つまり、点線で示す壁上端レベル２７）に設置される組立梁１８によって大屋根受けトラス３の下弦材１１の他端部１２が支持され、固定金具２３を用いてこの組立梁１８に固定される。組立梁１８の上面は、前述の点線で示す壁上端レベル２７と同じ高さに設けられ、かつ小屋根受け台形トラス４は、前記組立梁１８とは独立してその側方に設けられ、壁１０ａで支持されている。
【００１８】
本発明の実施形態に係る屋根構造の作用は次のとおりである。
▲１▼ 大屋根１の荷重を大屋根受けトラス３を介して組立梁１８が支持し、小屋根２の荷重を小屋根受け台形トラス４で支持することで、構造設計上、大屋根１と小屋根２の明確な支持構造の分離がなされている。
▲２▼ また、▲１▼により、組立梁１８、小屋根受け台形トラス４（又はキングポストトラス）ともシンプルな構造にでき、従来技術のような小屋根受け台形トラス４の回転力を抑える必要がない。
▲３▼ 大屋根軒部の接合を組立梁部分においても、従来と全く同じ方法で施工できるため、施工が簡単であり、特別の金物を必要としない。
▲４▼ 組立梁用接合金物１９は、（この種の通常の金物のように取付けフランジが両外側に突出するような構造でなく）金物巾が壁巾と同じであり、それ故に、金物がスタッド柱１５の両側から突出せず、壁のあらゆる部分に取付け可能である。なお、図６，図７に示す接合金物１９は、組立梁１８，１８ａに限らず床根太や天井根太を支持する金物として適用できる。
【００１９】
【発明の効果】
以上説明したように、本発明に係る建築物の屋根構造によると、大屋根と小屋根の接合部における大屋根軒部の開口間隔Ｌの開口部において、大屋根受けトラスの一方の端部を前記開口部に架設された組立梁の上面に支持させるから、大屋根の荷重を大屋根受けトラスを介して組立梁で支持させ、小屋根の荷重を小屋根受け台形トラスでそれぞれ支持でき、よって、構造設計上、大屋根と小屋根の明確な支持構造の分離が可能である。これにより小屋根受け台形トラスの構成を複雑化，大型化しなくてすみ、さらに小屋根受け台形トラスの下弦材に回転力が作用しないので、その回転を抑える機構も不要である。さらに、大屋根軒部の接合を組立梁部分においても、従来と全く同じ方法で施工できるため、施工が簡単であり、特別の金物を必要としないという効果がある。
【図面の簡単な説明】
【図１】本発明の実施形態に係る屋根構造を示す側面説明図である。
【図２】図１の平面図である。
【図３】図１の屋根構造における大屋根と小屋根の接合部における天井高さ位置で平面的に示す説明図である。
【図４】図３の正面説明図である。
【図５】（Ａ）は大屋根受けトラスの側面図、（Ｂ）は小屋根受け台形トラスの側面図である。
【図６】第１例に係る組立梁とその接合金物を示す斜視図である。
【図７】第２例に係る組立梁とその接合金物を示す斜視図である。
【図８】組立梁と大屋根受けトラスの支持構造を示す側面図である。
【図９】（Ａ），（Ｂ），（Ｃ），（Ｄ）は、大屋根と小屋根が接合された平面Ｌ形状の４種の屋根構造を示す斜視図である。
【図１０】従来構造に係る屋根構造を示す側面説明図である。
【図１１】図１０の平面図である。
【図１２】図１０の屋根構造における大屋根と小屋根の接合部における天井部高さ位置で平面的に示す説明図である。
【図１３】図１２の正面説明図である。
【図１４】（Ａ）は大屋根受けトラスの側面図、（Ｂ）は小屋根受け台形トラスの側面図である。
【図１５】小屋根受け台形トラスと大屋根受けトラスの支持構造を示す側面図である。
【符号の説明】
１大屋根
２小屋根
３大屋根受けトラス
４小屋根受け台形トラス
５大屋根側第１壁
６大屋根側第２壁
７大屋根側第３壁
８開口部
１０小屋根側コ字形壁
１１下弦材
１２他端部
１３下弦材
１４接合金物
１５スタッド柱
１６上弦材
１７斜材
１８組立梁
１９組立梁用接合金物
２０背面板
２１両側板
２２底面板
２３固定金具
２４内側溝形鋼
２５中間溝形鋼
２６外側溝形鋼
２７壁上端レベル[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roof structure of a building, in which a large roof and a small roof are joined, and in a roof having a planar shape of L shape, T shape, etc., there is a feature in the support structure of the joint portion of the large roof and the small roof. In particular, the present invention relates to a roof structure suitable for a steel building using channel steel as a frame material.
[0002]
[Prior art]
As shown in FIGS. 9A, 9B, 9C, and 9D, a large roof (main body roof) 1 and a small roof 2 are joined to form an L-shaped plane (an example of a T-shape is not shown). )) Is known. Figure (A) shows an example where the large roof 1 is gable and the small roof 2 is a dormitory. Figure (B) shows an example where both the large roof 1 and the small roof 2 are dormitories. Figure (C) shows the large roof 1 and the small dormitory. Both roofs 2 are examples of gables, and FIG. (D) shows an example in which the large roof is a dormitory and the small roof 2 is a gable.
[0003]
10 to 15 show a frame structure in a roof in which the large roof 1 and the small roof 2 are joined in a plane L shape as described above. A large roof is formed by arranging a plurality of large roof receiving trusses 3 parallel to both ends of the large roof 1, and the roof receiving of the small roof 2 with respect to the large roof receiving truss 3 located at the end in the direction of the wife. A trapezoidal truss 4 is provided at a right angle.
[0004]
A large roof side first wall 5 on which the large roof 1 is supported, and a large roof side second wall 6 provided at right angles to the large roof side first wall 5, and an end of the large roof side third wall 7 parallel to the large roof side first wall 5 The range of the opening interval L between the part wall 7a and the end wall 6a of the large roof side second wall 6 is an opening 8, and each of the second wall 6 and the third wall 7 on the large roof side Both end walls 10a of the small U-shaped flat roof 10 are connected to the end walls 7a and 6a so that the wall surface travels outward (note that the stud column 15 is disposed at this connection position). )
[0005]
The roof receiving truss 3 of the large roof 1 is formed by assembling the upper chord material 30 and the lower chord material 11 into a mountain shape and reinforcing them with a lattice material 28, a bundle material 29, and the like. One end is supported by the upper end of the first wall 5 on the large roof side, but there is no member supported on the other side due to the opening interval L. For this reason, the other end portion 12 of the large roof receiving truss 3 at the opening interval L is supported by the lattice material 9 or the bundle material 9 a of the trapezoidal truss 4 of the small roof 2 via the joint metal 14.
[0006]
That is, since both ends of the lower chord member 13 of the trapezoidal truss 4 of the small roof 2 are supported by the both side walls 10a of the small roof side U-shaped wall 10, the other end portion 12 of the large roof receiving truss 3 is the lower chord. The small roof pedestal truss 4 formed by assembling the material 13, the upper chord material 16, the diagonal material 17, and the lattice material 9 is fixed to the side surfaces of the lattice material 9, the bundle material 9 a, and the like via the joint hardware 14. Thus, the support structure of the other end portion 12 of the large roof receiving truss 3 at the opening interval L is provided.
[0007]
However, as shown in FIG. 15, the other end portion 12 of the large roof receiving truss 3 is joined to the side surface of the small roof receiving truss 4 at a position deviating from the central axis O of the small roof receiving truss 4. Therefore, when the roof load acts on the other end portion 12 via the large roof receiving truss 3 (indicated by a vertical downward arrow in FIG. 15), it acts eccentrically on the small roof receiving truss 4 and the small roof receiving truss 4 The rotational force indicated by the circular arc arrow in FIG.
[0008]
[Problems to be solved by the invention]
In the conventional L-shaped, T-shaped, etc. roof structures, the large roof and the small roof are supported by the same trapezoidal truss (that is, the small roof receiving truss). An excessive load was applied to the truss, and each member of the small roof pedestal truss increased in size, resulting in an increase in the number of members and joints, resulting in an increase in complicated details and assembly man-hours. In addition, since the load of the large roof acts on the lower chord material of the small roof pedestal truss, rotational force acts on this lower chord material, but it is difficult to suppress this rotational force, and the roof frame is distorted. there were.
[0009]
In view of the above-described drawbacks, the present invention clearly defines the support structure for the large roof load and the small roof load when the large roof eave portion is an opening at the portion where the large roof and the small roof are joined. By separating the structure, the conventional problem is solved.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems, a roof structure of a building according to the present invention includes a large roof constituted by a plurality of large roof receiving trusses, and a small roof constituted by a plurality of small roof receiving trusses and a small roof receiving truss. A roof structure having a roof shape such as an L-shape or a T-shape, and having both ends of the opening in the opening interval L of the large roof eave portion at the joint portion between the large roof and the small roof. The assembly beam is installed at a position below the ceiling surface by being fixed to the walls on both sides of the unit, and one end of the large roof receiving truss installed in the opening is placed and fixed on the upper surface of the assembly beam The large roof receiving truss is not supported by the small roof receiving truss by being fixedly supported by metal fittings .
In the present invention, the small roof is supported by a small roof receiving truss or a king post truss that is fixed to the walls on both sides of the opening, separately from the assembly beam.
Further, the present invention is characterized in that an assembly beam joint metal fitting in accordance with the wall width is fixed to walls located on both sides of the opening, and the assembly beam is joined and supported on the joint hardware.
[0011]
According to the present invention, one end of the large roof receiving truss is supported by the assembly beam erected in the opening at the opening portion L of the large roof eave portion at the joint portion between the large roof and the small roof. The large roof load and the small roof load are clearly separated in structure, so that the roof load does not act on the small roof pedestal truss as in the past, and the configuration of the small roof pedestal truss is not complicated and large. Rotational force does not act on the lower chord material of the small roof receiving truss.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same element as a conventional structure, and description is abbreviate | omitted.
[0013]
In the embodiment of the present invention, the cross-section is rectangular by combining groove steel with a predetermined length in the opening 8 of the opening interval L of the large roof eave portion at the joint where the large roof 1 and the small roof 2 are joined. The box-shaped assembly beam 18 is installed at a position below the ceiling surface.
[0014]
Both ends of the assembly beam 18 are walls 6a and 7a on both sides of the opening 8 (more specifically, one wall is one end of the second wall 6 on the large roof side and the small roof side U-shaped wall 10). The stud column 15 at the upper end of the stud column 15 at the wall where the crossing and the other wall are the wall at the portion where the third wall 7 on the large roof side and the other end of the U-shaped wall 10 on the small roof side intersect. The upper end of the assembly beam) is supported by an assembly beam joint 19 for fixing.
[0015]
As shown in FIG. 6, the assembled beam joint metal 19 is formed by cutting a flat steel plate into a joint metal unfolded shape and bending it through a fold line at a predetermined portion. The bottom plate 22 is configured in a frame shape with an open front and top. This assembly beam joint metal 19 is a stud column that passes through the back plate 20 with the back plate 20 applied to the walls 6a, 7a on both sides of the opening 8, and extends vertically at the positions of the walls 6a, 7a. By mounting a plurality of fixing brackets 23 such as drill screws, bolts, rivets, etc. on the side surfaces of the assembly 15, the assembly beam joint hardware 19 is fixed to the walls 6 a, 7 a. Then, both end portions of the box-shaped assembly beam 18 are inserted and supported inside through the front and upper open portions of the assembly beam joint 19, and penetrate both side plates 21 of the assembly beam joint 19. The fixing brackets 23 are placed on both side surfaces of the assembled beam 18 so that both end portions of the assembled beam 18 are fixed to the assembled beam joint 19.
[0016]
FIG. 7 shows a modified example of the assembly beam 18. This assembled beam 18a is formed by facing two inner channel steels 24 having thin steel plate lips to form a box cross section frame, and a pair of intermediate channel steels 25 so as to hold the box cross section frame from both sides. Are arranged and joined, and the outer channel steel 26 is arranged and joined so as to overlap the upper and lower portions of the intermediate channel steel 25. In this way, by superposition of the thin steel channel steel An example is shown in which an assembly frame 18a having a multi-section structure with improved cross-sectional strength is configured. Both ends of the assembly beam 18a are supported by the same assembly beam joint 19 as described above, and support the end of the large roof receiving truss 3.
[0017]
As shown in FIG. 8, a large roof receiving truss is provided by an assembly beam 18 installed at a position below the ceiling surface of the opening 8 where the large roof 1 and the small roof 2 join (that is, the wall upper end level 27 indicated by a dotted line). The other end portion 12 of the lower chord member 11 is supported and fixed to the assembly beam 18 using a fixing bracket 23. The upper surface of the assembly beam 18 is provided at the same height as the wall upper end level 27 indicated by the dotted line, and the small roof pedestal truss 4 is provided on the side thereof independently of the assembly beam 18. 10a.
[0018]
The operation of the roof structure according to the embodiment of the present invention is as follows.
(1) The assembly beam 18 supports the load of the large roof 1 through the large roof receiving truss 3, and the load of the small roof 2 is supported by the small roof receiving truss 4 so that Clear support structure separation of the small roof 2 is made.
(2) Also, by (1), the assembly beam 18 and the small roof receiving truss 4 (or king post truss) can be made simple, and it is necessary to suppress the rotational force of the small roof receiving truss 4 as in the prior art. There is no.
(3) Large roof eaves can be joined to the assembled beam part in exactly the same way as before, so construction is simple and no special hardware is required.
(4) The metal joint 19 for an assembled beam has the same width as the wall width (not a structure in which the mounting flange protrudes outwards like this kind of normal hardware). It does not protrude from both sides of the stud column 15 and can be attached to any part of the wall. 6 and 7 can be applied not only to the assembled beams 18 and 18a but also as a hardware that supports floor joists and ceiling joists.
[0019]
【The invention's effect】
As described above, according to the roof structure of a building according to the present invention, one end portion of the large roof receiving truss is formed at the opening portion L of the large roof eave portion at the joint portion between the large roof and the small roof. Since it is supported on the upper surface of the assembly beam installed in the opening, the load of the large roof can be supported by the assembly beam through the large roof receiving truss, and the load of the small roof can be supported by the small roof receiving truss, respectively. In terms of structural design, it is possible to clearly separate the supporting structure between the large roof and the small roof. As a result, the structure of the small roof pedestal truss need not be complicated and large. Further, since no rotational force acts on the lower chord material of the small roof pedestal truss, a mechanism for suppressing the rotation is unnecessary. Furthermore, since the large roof eaves can be joined to the assembly beam portion in the same manner as before, the construction is simple and there is an effect that no special hardware is required.
[Brief description of the drawings]
FIG. 1 is an explanatory side view showing a roof structure according to an embodiment of the present invention.
2 is a plan view of FIG. 1. FIG.
FIG. 3 is an explanatory diagram showing in plan view a ceiling height position at a joint portion between a large roof and a small roof in the roof structure of FIG. 1;
4 is an explanatory front view of FIG. 3. FIG.
5A is a side view of a large roof receiving truss, and FIG. 5B is a side view of a small roof receiving truss.
FIG. 6 is a perspective view showing an assembly beam and its joint hardware according to the first example.
FIG. 7 is a perspective view showing an assembly beam and its joint hardware according to a second example.
FIG. 8 is a side view showing a support structure for an assembly beam and a large roof receiving truss.
FIGS. 9A, 9B, 9C, and 9D are perspective views showing four types of roof structures having a planar L shape in which a large roof and a small roof are joined together.
FIG. 10 is an explanatory side view showing a roof structure according to a conventional structure.
11 is a plan view of FIG.
12 is an explanatory diagram showing in plan view the height of the ceiling at the joint between the large roof and the small roof in the roof structure of FIG.
13 is an explanatory front view of FIG. 12. FIG.
14A is a side view of a large roof receiving truss, and FIG. 14B is a side view of a small roof receiving truss.
FIG. 15 is a side view showing a support structure for a small roof receiving truss and a large roof receiving truss.
[Explanation of symbols]
1 large roof 2 small roof 3 large roof receiving truss 4 small roof receiving trapezoidal truss 5 large roof side first wall 6 large roof side second wall 7 large roof side third wall 8 opening 10 small roof side U-shaped wall 11 lower string Material 12 Other end portion 13 Lower chord material 14 Joint metal 15 Stud column 16 Upper chord material 17 Diagonal material 18 Assembly beam 19 Assembly beam for assembly beam 20 Back plate 21 Both side plates 22 Bottom plate 23 Fixing bracket 24 Inner channel steel 25 Intermediate groove shape Steel 26 Outer channel steel 27 Wall top level

Claims

The roof structure is composed of a large roof composed of a plurality of large roof receiving trusses and a small roof composed of a plurality of small roof receiving trusses and a small roof receiving truss, and the planar shape is L-shaped, T-shaped, etc. The assembly beam is positioned below the ceiling surface by fixing both ends of the large roof eave portion at the opening portion L at the joint portion between the large roof and the small roof to the walls on both sides of the opening. Install and place one end of a large roof receiving truss installed in the opening on the upper surface of the assembly beam and fix it with a fixing bracket to support the large roof receiving truss in the form of a small roof receiving truss A roof structure of a building characterized by not supporting the truss .

The roof structure of a building according to claim 1, wherein the small roof is supported by a small roof receiving truss or a king post truss fixed to the walls on both sides of the opening, separately from the assembly beam.

The roof structure of a building according to claim 1 or 2, wherein the joint beam for the assembly beam matching the wall width is fixed to the walls located on both sides of the opening, and the assembly beam is joined and supported by the joint hardware.