JP7218665B2 - Roof structure and roof structure construction method - Google Patents

Roof structure and roof structure construction method Download PDF

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JP7218665B2
JP7218665B2 JP2019081331A JP2019081331A JP7218665B2 JP 7218665 B2 JP7218665 B2 JP 7218665B2 JP 2019081331 A JP2019081331 A JP 2019081331A JP 2019081331 A JP2019081331 A JP 2019081331A JP 7218665 B2 JP7218665 B2 JP 7218665B2
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roof
sheathing board
edge
rafter
roof panel
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JP2020176490A (en
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福太郎 浅井
亮介 佐藤
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Sekisui House Ltd
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Sekisui House Ltd
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Priority to PCT/JP2020/016627 priority patent/WO2020218128A1/en
Priority to AU2020262609A priority patent/AU2020262609A1/en
Priority to US17/287,224 priority patent/US11643816B2/en
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Description

本発明は、屋根勾配を形成する屋根パネルを用いた屋根構造、及びその施工方法に関する。 TECHNICAL FIELD The present invention relates to a roof structure using roof panels that form a roof slope, and a construction method thereof.

従来より、傾斜屋根を形成する場合、母屋などの水平下地材に架設される垂木材に屋根仕上材の下地となる板材を固定した屋根パネルを用いることがある（例えば、特許文献１及び特許文献２）。これらの屋根パネルは、垂木材と、その上に載置固定される板材と、を予め工場で一体化した状態で施工現場に搬入されるため、各部材を屋根の高さまで持上げて個別に施工する必要がなく、施工性を向上させることができる。 Conventionally, when forming a sloped roof, there are cases where a roof panel is used in which a plate material that serves as a base for a roof finishing material is fixed to rafters that are installed on a horizontal base material such as a purlin (for example, Patent Document 1 and Patent Document 2). These roof panels are transported to the construction site in a state where the rafters and the plate material to be placed and fixed on them are pre-integrated at the factory, so each member is lifted to the height of the roof and installed individually. workability can be improved.

特開平１０－４６７３７Japanese Patent Laid-Open No. 10-46737 特開平７－２８６３９４Japanese Patent Laid-Open No. 7-286394

ところで、木造屋根構造において、母屋材と垂木材との接合強度、及び垂木材と野地板との接合強度を併せることによって屋根構面全体としての耐力（水平耐力）を確保する場合がある。しかしながら特許文献１及び特許文献２に記載の屋根パネルでは、隣合う屋根パネル同士が水平方向、及び屋根勾配方向共に継ぎ目を合致させた状態で水平下地材上に配置されるため、屋根パネルの継ぎ位置が構造上の弱点となり、水平ブレースのような補強材を設置しなければ屋根全体の水平耐力を確保できない可能性が高い。また屋根パネルの継ぎ位置を千鳥配置にすることもできるが、屋根パネルの割付が複雑化するため施工手間がかかるという問題点が挙げられる。 By the way, in a wooden roof structure, the joint strength between the purlin material and the rafters and the joint strength between the rafters and the sheathing board may be combined to ensure the strength (horizontal strength) of the entire roof structural surface. However, in the roof panels described in Patent Literature 1 and Patent Literature 2, since the adjacent roof panels are arranged on the horizontal base material with the joints aligned in both the horizontal direction and the roof slope direction, the joints of the roof panels The position is a structural weakness, and it is highly likely that the horizontal strength of the entire roof cannot be secured without installing reinforcements such as horizontal braces. Although it is possible to arrange the joint positions of the roof panels in a zigzag arrangement, this complicates the layout of the roof panels, which poses a problem of requiring a lot of work.

また一方で、梁間の大きい屋根や片流れ屋根のように長さのある大きな勾配屋根を形成する場合、屋根勾配に沿って傾斜する木製の垂木材同士を継ぐことがあるが、垂木材の継ぎ手部分は、精度よく繋ぎ合わせなければ滑らかな屋根面を形成することができないため高精度な施工が要求される。しかしながら、傾斜させた長尺な垂木材同士を正確に継ぐ作業は非常に難しく、その施工精度は施工者の技術に拠るところが大きいため、施工現場ごとに施工品質に差が生じることがあった。 On the other hand, when forming a long sloped roof such as a roof with a large gap between beams or a shed roof, wooden rafters that slope along the roof slope may be joined together. Since it is not possible to form a smooth roof surface without joining with high accuracy, high-precision construction is required. However, it is extremely difficult to accurately join long slanted rafters together, and since the construction accuracy largely depends on the skill of the builder, there have been differences in construction quality between construction sites.

そこで、本発明は、上述した課題を鑑みてなされたものであって、屋根に必要な構造耐力を保持しつつも容易に施工することができる屋根構造、及びその施工方法を提供することを目的とする。 SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a roof structure that can be easily constructed while maintaining the necessary structural strength of the roof, and a construction method thereof. and

本発明の第１の屋根構造は、互いに間隔を空けて平行に配置され、軒桁方向へ延びる複数の水平下地材と、第１野地板と、前記第１野地板の下面に互いに間隔を空けて平行に固定され、少なくとも前記第１野地板の一方の端縁から突出する複数の第１垂木材と、を有し、互いに間隔を空けて平行に配置された複数の水平下地材の上部に固定される屋根パネルであって、前記第１垂木材の前記第１野地板の端縁から突出する第１突出部の突出長さは、隣合う前記水平下地材の間隔以上である屋根パネルと、を備え、前記屋根パネルは、前記第１突出部を水上側へ向けて前記水平下地材に固定されることを特徴としている。 A first roof structure of the present invention includes a plurality of horizontal base materials arranged in parallel with each other and extending in an eaves girder direction, a first sheathing board, and a lower surface of the first sheathing board spaced apart from each other. a plurality of first rafters fixed parallel to each other and protruding from at least one edge of said first sheathing board; A fixed roof panel, wherein a projection length of a first projecting portion projecting from an edge of the first sheathing board of the first rafter is equal to or greater than the distance between the adjacent horizontal base members. , wherein the roof panel is fixed to the horizontal substrate with the first projecting portion directed toward the water side.

本発明の第２の屋根構造は、一方の端縁が前記第１野地板の一方の端縁に突き合せて配置される第２野地板、及び前記第２野地板の下面に互いに間隔を空けて平行に固定され、少なくとも一端が前記第２野地板の一方の端縁に配置される複数の第２垂木材を有する受け屋根パネルを備え、前記受け屋根パネルは、前記第２垂木材の一端部を隣合う前記第１突出部同士の間に配置して前記水平下地材に固定されることを特徴としている。 A second roof structure of the present invention includes: a second sheathing board having one edge facing one edge of the first sheathing board; and a lower surface of the second sheathing board spaced apart from each other. a receiving roof panel having a plurality of second rafters fixed parallel to each other and having at least one end positioned at one edge of said second sheathing board, said receiving roof panel being connected to one end of said second rafters; is fixed to the horizontal base material by arranging the portions between the adjacent first projecting portions.

本発明の第３の屋根構造は、一方の端縁が前記第２野地板の他方の端縁に突き合せて配置される第３野地板と、前記第３野地板の下面に互いに間隔を空けて平行に固定され、一端が前記第３野地板の一方の端縁から突出する複数の第３垂木材と、を有する第２屋根パネルと、を備え、前記第２屋根パネルは、前記第３垂木材の前記第３野地板の端縁から突出する第２突出部を水下側へ向けて最も水上側の前記水平下地材に固定され、前記受け屋根パネルは、前記第２垂木材の他端部を隣合う前記第２突出部同士の間に配置して前記水平下地材に固定されることを特徴としている。 A third roof structure of the present invention includes: a third sheathing board having one edge facing the other edge of the second sheathing board; and a lower surface of the third sheathing board spaced apart from each other. a second roof panel having a plurality of third rafters fixed parallel to each other and having one end projecting from one edge of said third sheathing board, said second roof panel being connected to said third A second projecting part of the rafter projecting from the edge of the third sheathing board is fixed to the horizontal base member on the most water side with the second projecting part facing the water side, and the receiving roof panel is provided in addition to the second rafter. It is characterized in that the ends are arranged between the adjacent second protrusions and fixed to the horizontal base member.

本発明の第１の屋根構造施工方法は、第３の屋根構造を用いた屋根構造施工方法であって、前記第１垂木材の前記第１突出部を水上側へ向けて前記屋根パネルを前記水平下地材に固定し、前記第２野地板の一方の端縁を前記第１野地板の一方の端縁に突き合せるとともに、前記第２垂木材の一端部を前記第１突出部同士の間に配置して前記受け屋根パネルを前記水平下地材に固定し、前記第２野地板を前記第１突出部に固定することを特徴としている。 A first roof structure construction method of the present invention is a roof structure construction method using a third roof structure , wherein the roof panel is installed with the first projecting portion of the first rafter facing the water side. It is fixed to the horizontal base material, one edge of the second sheathing board is abutted against one edge of the first sheathing board, and one end of the second rafter is placed between the first protrusions. , the receiving roof panel is fixed to the horizontal base material, and the second sheathing board is fixed to the first projecting portion.

本発明の第２の屋根構造施工方法は、前記第３垂木材の前記第２突出部を水下側へ向けて前記第２屋根パネルを最も水上の前記水平下地材に固定した後に、上方から前記第２野地板の両端縁を、それぞれ前記第１野地板の一方の端縁及び前記第３野地板の一方の端縁に突き合せ、第２垂木材の一端部を前記第１突出部同士の間に配置するとともに、第２垂木材の他端部を前記第２突出部同士の間に配置して前記受け屋根パネルを前記水平下地材に固定し、前記第２野地板を前記第１突出部及び前記第２突出部に固定することを特徴としている。 In the second roof structure construction method of the present invention, after the second roof panel is fixed to the horizontal substrate most above the water with the second projecting portion of the third rafter facing underwater, Both end edges of the second sheathing board are butted against one edge of the first sheathing board and one edge of the third sheathing board, respectively, and one end of the second rafter is connected to the first projecting part. The receiving roof panel is fixed to the horizontal base member by arranging the other end of the second rafter between the second protrusions, and the second sheathing board is arranged between the first It is characterized in that it is fixed to the projecting portion and the second projecting portion.

本発明の第１の屋根パネルによると、第１垂木材の一端部が第１野地板の端縁から突出して第１突出部を形成しているので、第１突出部を屋根勾配の方向へ向けて屋根パネルを水平下地材の上部に設置し、一般的に普及している野地板と垂木材とを一体化した複合パネルの野地板を第１野地板の一方の端縁に突き合わせるとともに、複合パネルの垂木材を隣合う第１垂木材同士の間に配置して複合パネルを水平下地材に固定すれば、各パネルの垂木材同士の間隔を密にすることができる。したがって、従来のように各パネルの垂木材の端部同士を継ぐ必要がなく施工性を向上させることができるとともに、垂木材の継ぎ目部分の構造耐力を強化することができる。また、各パネルの野地板の継ぎ目と垂木材の継ぎ目とが合致しないので、構造的な弱点を補うことができ、屋根に必要な構造耐力を保持することができる。そして、第１突出部の突出長さが、隣合う水平下地材の間隔以上であるため、屋根パネルを安定的に水平下地材の上部に設置することができる。 According to the first roof panel of the present invention, one end of the first rafter protrudes from the edge of the first sheathing board to form the first protrusion. The roof panel is installed on top of the horizontal base material, and the sheathing board of the composite panel that integrates the general sheathing board and the rafters is butted against one edge of the first sheathing board. If the rafters of the composite panel are positioned between adjacent first rafters and the composite panel is secured to the horizontal substrate, the rafters of each panel can be closely spaced. Therefore, it is not necessary to join the ends of the rafters of each panel to each other, which makes it possible to improve workability, and to increase the structural strength of the joints of the rafters. In addition, since the joints of the sheathing boards and the joints of the rafters of each panel do not match, structural weaknesses can be compensated for, and the necessary structural strength of the roof can be maintained. Further, since the length of protrusion of the first projecting portion is equal to or longer than the interval between adjacent horizontal base members, the roof panel can be stably installed above the horizontal base members.

本発明の第１の屋根構造によると、屋根パネルは、第１突出部を水上側へ向けて屋水平下地材に固定されるので、一般的に普及している野地板と垂木材とを一体化した複合パネルの野地板を水上側から第１野地板の一方の端縁に突き合わせるとともに、複合パネルの垂木材を隣合う第１垂木材同士の間に配置して複合パネルを水平下地材に固定すれば、各パネルの垂木材同士の間隔を密にすることができる。したがって、従来のように各パネルの垂木材の端部同士を継ぐ必要がなく施工性を向上させることができるとともに、垂木材の継ぎ目部分の構造耐力を強化することができる。そして、各パネルの野地板の継ぎ目と垂木材の継ぎ目とが合致しないため、構造的な弱点を補うことができ、また、垂木材と野地板との接合強度を保持することにより、屋根構面全体としての必要な水平耐力を確保することができる。 According to the first roof structure of the present invention, the roof panel is fixed to the roof horizontal base material with the first projecting part facing the water side, so that the general sheathing board and the rafters are integrated. The sheathing board of the combined composite panel is butted against one edge of the first sheathing board from the water side, and the rafters of the composite panel are arranged between the adjacent first rafters to form the composite panel as a horizontal base material. , the rafters of each panel can be closely spaced. Therefore, it is not necessary to join the ends of the rafters of each panel to each other, which makes it possible to improve workability, and to increase the structural strength of the joints of the rafters. Since the joints of the sheathing boards of each panel do not match the joints of the rafters, structural weaknesses can be compensated for. The required horizontal strength as a whole can be secured.

本発明の第２の屋根構造によると、第２野地板の一方の端縁を第１野地板の一方の端縁に突き合わせて配置するとともに、第２垂木材の一端部を隣合う第１突出部同士の間に配置して受け屋根パネルを水平下地材に固定するので、第２垂木材の一端部と第１突出部との間隔を密にすることができる。したがって、従来のように各パネルの垂木材の端部同士を継ぐ必要がなく施工性を向上させることができるとともに、垂木材の継ぎ目部分の構造耐力を強化することができる。そして、各パネルの野地板の継ぎ目と垂木材の継ぎ目とが合致しないため、構造的な弱点を補うことができ、また、垂木材と野地板との接合強度を保持することにより、屋根構面全体としての必要な水平耐力を確保することができる。 According to the second roof structure of the present invention, one edge of the second sheathing board is arranged to abut against one edge of the first sheathing board, and one end of the second rafter is attached to the adjacent first projection. Since the receiving roof panel is fixed to the horizontal substrate by being placed between the sections, the spacing between one end of the second rafter and the first protrusion can be close. Therefore, it is not necessary to join the ends of the rafters of each panel to each other, which makes it possible to improve workability, and to increase the structural strength of the joints of the rafters. Since the joints of the sheathing boards of each panel do not match the joints of the rafters, structural weaknesses can be compensated for. The required horizontal strength as a whole can be secured.

本発明の第３の屋根構造によると、第３野地板の一方の端縁を第２野地板の他方の端縁に突き合わせて配置するとともに、第２垂木材の他端部を隣合う第２突出部同士の間に配置して受け屋根パネルを水平下地材に固定するので、大屋根の場合であっても各屋根パネルを組み合わせることにより、施工現場で各垂木材の端部同士を継ぐ必要がなく、施工性を向上させることができる。 According to the third roof structure of the present invention, one edge of the third sheathing board is arranged to abut the other edge of the second sheathing board, and the other end of the second rafter is placed on the adjacent second rafter. Since the receiving roof panel is placed between the protrusions and fixed to the horizontal base material, it is necessary to join the ends of each rafter at the construction site by combining each roof panel even in the case of a large roof. It is possible to improve workability.

本発明の第１の屋根構造施工方法によると、屋根パネルを水平下地材に架設後、第１野地板から露出した隣合う第１突出部同士の間に第２垂木材の一端部を配置するので、施工現場で第１垂木材及び第２垂木材の端部同士を継ぐ必要がなく、施工性を向上させることができる。 According to the first roof structure construction method of the present invention, after installing the roof panel on the horizontal base material, one end of the second rafter is placed between the adjacent first projections exposed from the first sheathing board. Therefore, there is no need to join the ends of the first rafter and the second rafter at the construction site, and workability can be improved.

本発明の第２の屋根構造施工方法によると、第２屋根パネルを最水上の水平下地材に固定して水上側の位置決めをした後に、屋根パネルと第２屋根パネルとの間に受け屋根パネルを上方から落とし込むだけで屋根構造を構築することができるので、施工性を向上させることができる。また第２垂木材の両端部は、第１野地板及び第３野地板からそれぞれ露出した第１突出部同士及び第２突出部同士の間に配置されるので、施工現場で各垂木材の端部同士を継ぐ必要がなく、施工性を向上させることができる。 According to the second roof structure construction method of the present invention, after the second roof panel is fixed to the uppermost horizontal base member and positioned above the water, a receiving roof panel is placed between the roof panel and the second roof panel. Since the roof structure can be constructed only by dropping from above, workability can be improved. In addition, since both ends of the second rafters are arranged between the first projecting portions and the second projecting portions exposed from the first roof board and the third roof board, respectively, the ends of the rafters are arranged at the construction site. There is no need to connect the parts, and workability can be improved.

第１実施形態の屋根構造を示す斜視図。The perspective view which shows the roof structure of 1st Embodiment. 屋根パネルを示す斜視図。The perspective view which shows a roof panel. 補強垂木を有する屋根パネルを示す斜視図。FIG. 4 is a perspective view showing a roof panel with reinforcing rafters; 受け屋根パネルを示す斜視図。4 is a perspective view showing a receiving roof panel; FIG. 屋根パネルを水平下地材に架設する状況を示す斜視図。The perspective view which shows the condition which erects a roof panel on a horizontal base material. 受け屋根パネルを水平下地材に架設する状況を示す斜視図。The perspective view which shows the condition which erects a receiving roof panel on a horizontal base material. （ａ）第１垂木材を軒桁に固定する状況を示す斜視図、（ｂ）第１垂木材を軒桁に固定した様子を示す斜視図。(a) A perspective view showing how the first rafter is fixed to the eaves girder, (b) A perspective view showing how the first rafter is fixed to the eaves girder. 第２垂木材を母屋に設置する状況を示す斜視図。The perspective view which shows the condition which installs a 2nd rafter in a purlin. 第１実施形態の屋根構造を示す平面図。The top view which shows the roof structure of 1st Embodiment. 屋根パネル及び受け屋根パネルを水平下地材に複数架設した状況を示す平面図。FIG. 2 is a plan view showing a state in which a plurality of roof panels and receiving roof panels are installed on a horizontal base member; 屋根パネルを複数有する屋根構造を示す平面図。1 is a plan view of a roof structure having multiple roof panels; FIG. 屋根パネルと第２屋根パネルとの間に受け屋根パネルを設置する状況を示す斜視図。FIG. 4 is a perspective view showing the installation of a receiving roof panel between the roof panel and the second roof panel; 第２実施形態の屋根構造を示す平面図。The top view which shows the roof structure of 2nd Embodiment.

＜第１実施形態＞
以下、本発明に係る屋根構造１の実施形態について各図を参照しつつ説明する。図１に示す屋根構造１は、主に木質構造の傾斜屋根に使用される構造であって、互いに間隔を空けて平行に配置され、軒桁方向へ延びる複数の水平下地材２と、屋根パネル３と、屋根パネル３よりも水上側に配置される受け屋根パネル４と、を備えている。 <First Embodiment>
EMBODIMENT OF THE INVENTION Hereinafter, it demonstrates, referring each figure for embodiment of the roof structure 1 which concerns on this invention. A roof structure 1 shown in FIG. 1 is a structure mainly used for a sloping wooden roof, and includes a plurality of horizontal base members 2 arranged in parallel with each other at intervals and extending in the eaves beam direction, and a roof panel. 3 and a receiving roof panel 4 arranged above the water side of the roof panel 3.

水平下地材２は、図１に示すように、屋根勾配に沿って高低差を形成しながら互いに間隔を空けて略平行に配置され、図示しない柱や小屋束に支持されて軒桁方向へ延びる複数の長尺材であり、上部に屋根パネル３及び受け屋根パネル４を載置される。図示例では、水平下地材２は、最も水下側に配置される軒桁２１、最も水上側に配置される棟木２２、及び軒桁２１と棟木２２との間にこれらと平行に配置される複数の母屋２３、から構成されている。各水平下地材２間の間隔Ｌ１は、屋根の形状や地域ごとの気候、屋根に作用する荷重などを考慮して構造計算により算定され、例えば、母屋２３～母屋２３間であれば垂直距離を１５００ｍｍ程度～２０００ｍｍ程度とすることができる。なお、図１における水平下地材２の配置は一例を示したもであり、水平下地材２の種類や形状、母屋２３の本数は特に限定されない。 As shown in FIG. 1, the horizontal base members 2 are arranged substantially parallel to each other while forming a height difference along the slope of the roof, and are supported by columns and shed bundles (not shown) and extend in the eaves beam direction. It is a plurality of elongated members, on which the roof panel 3 and the receiving roof panel 4 are mounted. In the illustrated example, the horizontal base material 2 is arranged in parallel with the eaves girder 21 arranged on the most downstream side, the ridge beam 22 arranged on the most water side, and between the eaves girder 21 and the ridge beam 22. It is composed of a plurality of purlins 23 . The interval L1 between the horizontal base members 2 is calculated by structural calculation considering the shape of the roof, the climate of each region, the load acting on the roof, etc. For example, between the purlins 23, the vertical distance is It can be about 1500 mm to 2000 mm. The arrangement of the horizontal base members 2 in FIG. 1 is an example, and the type and shape of the horizontal base members 2 and the number of purlins 23 are not particularly limited.

図１及び図５に示すように、軒桁２１、棟木２２の上面には後述する第１垂木材３２及び第２垂木材４２を受けるための垂木台２ａがそれぞれ固定されており、垂木台２ａには、各垂木材３２、４２と当接する箇所ごとに図７（ａ）に示す断面視略三角形の切欠き２ｂが形成されている。また図５及び図８に示すように、母屋２３の水下側の側面には、上面を屋根勾配に合わせて傾斜させた断面視台形の垂木掛け２３ａがビスや釘などの固定具Ａによって固定されており、各垂木材３２、４２を安定して載置することができる。 As shown in FIGS. 1 and 5, rafter bases 2a for receiving a first rafter 32 and a second rafter 42, which will be described later, are fixed to the upper surfaces of the eaves girders 21 and the ridge beams 22, respectively. A notch 2b having a substantially triangular cross-sectional view shown in FIG. As shown in FIGS. 5 and 8, on the side surface of the purlin 23 on the underwater side, a rafter hanger 23a having a trapezoidal cross section whose upper surface is inclined in accordance with the slope of the roof is fixed with a fixture A such as a screw or a nail. The rafters 32, 42 can be placed stably.

屋根パネル３は、野地板と垂木材とを予め工場で一体化される複合パネルで、図２に示すように、第１野地板３１と、第１野地板３１の下面３１ａに互いに間隔を空けて平行に固定される複数の第１垂木材３２と、を有している。第１野地材３１は、厚さ１２ｍｍ程度の構造用合板が使用され、幅２０００ｍｍ程度以下、長さ３０００ｍｍ～４０００ｍｍ程度以下で形成されており、このような大きさとすることによって、施工時に屋根パネル３を支障なくクレーンで吊り上げて所定の位置に配置することができ、また容易に運搬することができる。第１垂木材３２は、第１野地板３１の上方から複数打ち込まれる固定具Ａによって第１野地板３１と連結固定され、一端部が第１野地板３１の一方の端縁３１ｂから突出しており、この突出した部分である第１突出部３２ａの突出長さＬ２は、図１に示す、隣合う水平下地材２間の間隔Ｌ１以上となっている。また、第１垂木材３２の他端部３２ｂは、第１野地板３１の他方の端縁３１ｃから突出して軒を形成する部分であり、図１に示すように、軒桁２１に載置される。この他端部３２ｂの軒桁２１と接する部分の側面３２ｃには、図７（ａ）に示すように、軒の出を揃えるために基準墨３２ｄがマーキングされており、他端部３２ｂの第１野地板３１からの出幅は、屋根ごとの軒の出によって決定される。なおこの第１垂木材３２の他端部３２ｂは、屋根パネル３を最水下に設置しない場合は第１野地板３１の他方の端縁３１ｃから突出させない。 The roof panel 3 is a composite panel in which the sheathing board and the rafters are integrated in advance at the factory, and as shown in FIG. a plurality of first rafters 32 fixed parallel to each other. The first sheathing material 31 is made of structural plywood with a thickness of about 12 mm, and is formed with a width of about 2000 mm or less and a length of about 3000 mm to 4000 mm or less. 3 can be lifted up by a crane and placed at a predetermined position without hindrance, and can be easily transported. The first rafters 32 are connected and fixed to the first sheathing board 31 by a plurality of fasteners A driven from above the first sheathing board 31, and one end protrudes from one edge 31b of the first sheathing board 31. The protruding length L2 of the first protruding portion 32a, which is the protruding portion, is equal to or greater than the interval L1 between the adjacent horizontal base members 2 shown in FIG. The other end portion 32b of the first rafter 32 is a portion that protrudes from the other edge 31c of the first sheathing board 31 to form the eaves, and is placed on the eaves beam 21 as shown in FIG. be. As shown in FIG. 7(a), the side surface 32c of the portion of the other end 32b in contact with the eaves girder 21 is marked with a reference mark 32d for aligning the overhang of the eaves. 1 The width of the projection from the roof board 31 is determined by the projection of the eaves for each roof. The other end 32b of the first rafter 32 does not protrude from the other edge 31c of the first sheathing board 31 when the roof panel 3 is not installed at the lowest water level.

屋根パネル３は、図１に示すように、第１垂木材３２の第１突出部３２ａ側を水上側に向けて水平下地材２上に固定され、その全長は少なくとも水平下地材２間の間隔Ｌ１の２～３倍以上あることが望ましい。なお、図３に示すように軒の出が大きい屋根を形成する場合は、複数の第１垂木材３２の他端部３２ｂうち、両端を除く他端部３２ｂに隣接して補強垂木３３を設置することで軒の強度を補強することができる。なお図示していないが、補強垂木３３は、一端部の端縁を他端部３２ｂの端縁に揃えて配置された状態で、他端部を棟木２１に隣接する母屋２３に架渡すことが可能な長さを有している。 As shown in FIG. 1, the roof panel 3 is fixed on the horizontal base material 2 with the first protruding part 32a side of the first rafter 32 facing the water side, and the total length thereof is at least the distance between the horizontal base materials 2. It is desirable to have 2 to 3 times or more of L1. When forming a roof with a large overhang of the eaves as shown in FIG. By doing so, the strength of the eaves can be reinforced. Although not shown, the reinforcing rafters 33 can be arranged so that the edge of one end is aligned with the edge of the other end 32b, and the other end can be bridged over the purlin 23 adjacent to the ridge beam 21. have the length possible.

隣合う第１垂木材３２同士の間隔は、「木造軸組工法住宅の許容応力度設計（２０１７年度版）」に規定される水平下地材への配置基準に倣い５００ｍｍ以下とすることが望ましい。また複数の第１垂木材３２同士の間隔は、割付けの容易さや施工性を考慮して等間隔とすることが望ましいが、５００ｍｍ以下の間隔であれば必ずしも等間隔とする必要はない。 The interval between adjacent first rafters 32 is desirably 500 mm or less in accordance with the placement standards for horizontal substrates stipulated in "Allowable Stress Design for Wooden Frame Construction Houses (2017 edition)". Further, it is desirable that the intervals between the plurality of first rafters 32 are equal in consideration of easiness of allocation and workability, but if the intervals are 500 mm or less, they do not necessarily need to be equal.

受け屋根パネル４は、屋根パネル３と同様、野地板と垂木材とを予め工場で一体化される複合パネルで、図４に示すように、第２野地板４１と、第２野地板４１の下面４１ａに互いに間隔を空けて平行に固定される複数の第２垂木材４２と、を有している。第２垂木材４２は、第２野地板４１の上方から複数打ち込まれる固定具Ａによって第２野地板４１と連結固定されており、両端がそれぞれ第２野地板４１の一方の端縁４１ｂ及び他方の端縁４１ｃに配置され、屋根パネル３とは異なり第２垂木材４２の両端部４２ａ、４２ｂは第２野地板４１から突出していない。受け屋根パネル４は、図１に示すように、第１突出部３２ａの上部に重ねて配置されるパネルであり、全長が水平下地材２間の間隔Ｌ２の２倍以上あることが望ましい。なお、第２野地板４１の構成及び第２垂木材４２同士の間隔は、それぞれ第１野地材３１の構成及び第１垂木材３２同士の間隔と同様となっている。 The receiving roof panel 4, like the roof panel 3, is a composite panel in which the sheathing board and the rafters are integrated in advance at the factory, and as shown in FIG. and a plurality of second rafters 42 fixed in parallel and spaced apart from each other on the lower surface 41a. The second rafters 42 are connected and fixed to the second roof board 41 by a plurality of fasteners A that are driven from above the second roof board 41, and both ends of the second roof board 41 are connected to one edge 41b and the other edge of the second roof board 41, respectively. , and unlike the roof panel 3, the ends 42a, 42b of the second rafter 42 do not protrude from the second sheathing board 41. As shown in FIG. The receiving roof panel 4 is, as shown in FIG. The configuration of the second sheathing boards 41 and the spacing between the second rafters 42 are the same as the configuration of the first sheathing boards 31 and the spacing between the first rafters 32, respectively.

次に、屋根構造１の施工方法について説明する。まず、図５に示すように、図外の柱や小屋束に架け渡された水平下地材２に屋根パネル３を架設する。屋根パネル３は、第１垂木材３２の第１突出部３２ａを水上側に向けた状態で軒桁２１上部の垂木台２ａ及び母屋２３に固定された垂木掛け２３ａに載置され、図７（ａ）に示すように、垂木台２ａの切欠き２ｂに第１垂木材３２の他端部３２ｂを嵌め込まれる。そして、基準墨３２ｄと垂木台２ａの水下側の角とを整合させて他端部３２ｂの軒桁２１からの出幅を揃えた後、図７（ｂ）に示すように、上方から長尺ビスＢで他端部３２ｂと軒桁２１とを一体的に連結固定する。このとき、基準墨３２ｄが第１野地板３１によって隠蔽されていないため、容易に基準墨３２ｄを軒桁２１の所定の位置に合わせることができ、施工性を向上させることができる。さらに図８に示すように、第１垂木材３２の垂木掛け２３ａに当接する部分に、第１野地板３１の上方から長尺ビスＢを打ち込んで順次屋根パネル３を水平下地材２に固定する。 Next, a construction method for the roof structure 1 will be described. First, as shown in FIG. 5, the roof panel 3 is erected on the horizontal base material 2 that is spanned by the pillars and the shed bundles (not shown). The roof panel 3 is placed on the rafter base 2a above the eaves girder 21 and the rafter hook 23a fixed to the purlin 23 with the first projecting portion 32a of the first rafter 32 directed toward the water side. As shown in a), the other end 32b of the first rafter 32 is fitted into the notch 2b of the rafter base 2a. Then, after aligning the reference mark 32d with the corner of the rafter base 2a on the underwater side to align the protrusion width of the other end portion 32b from the eaves girder 21, as shown in FIG. The other end portion 32b and the eaves girders 21 are integrally connected and fixed with a length screw B. At this time, since the reference mark 32d is not hidden by the first sheathing board 31, the reference mark 32d can be easily aligned with the predetermined position of the eaves girder 21, and workability can be improved. Further, as shown in FIG. 8, the roof panels 3 are sequentially fixed to the horizontal base member 2 by driving long screws B from above the first sheathing board 31 into the portions of the first rafters 32 abutting against the rafter hooks 23a. .

続いて、図１及び図６に示すように、受け屋根パネル４を第１野地板３１よりも水上側に位置する母屋２３に固定された垂木掛け２３ａ及び棟木２２上部の垂木台２ａに載置する。このとき、第２垂木材４２の一端部４２ａは、隣合う第１突出部３２ａ同士の間に配置され、第２野地板４１の一方の端縁４１ｂは第１野地板３１の一方の端縁３１ｂに突き合わされる。そして、屋根パネル３と同様の手順で棟木２２の垂木台２ａに第２垂木材４２の他端部４２ｂを嵌め込み、図９に示すように、第２野地板４１の上方から長尺ビスＢで受け屋根パネル４と棟木２２とを一体的に連結固定するとともに、第２垂木材４２の垂木掛け２３ａに当接する部分に、第２野地板４１の上方から長尺ビスＢを打ち込んで受け屋根パネル４を水平下地材２に固定する。 Subsequently, as shown in FIGS. 1 and 6, the receiving roof panel 4 is placed on the rafter hanger 23a fixed to the purlin 23 positioned above the water side of the first sheathing board 31 and on the rafter base 2a above the ridgepole 22. do. At this time, one end 42a of the second rafter 42 is arranged between the adjacent first projections 32a, and one edge 41b of the second sheathing board 41 is one edge of the first sheathing board 31. 31b. Then, the other end 42b of the second rafter 42 is fitted to the rafter base 2a of the ridgepole 22 in the same procedure as for the roof panel 3, and as shown in FIG. The receiving roof panel 4 and the ridgepole 22 are integrally connected and fixed, and a long screw B is driven from above the second sheathing board 41 into the part of the second rafter 42 that contacts the rafter hook 23a to attach the receiving roof panel. 4 is fixed to the horizontal base material 2.

このようにして水平下地材２上に固定された屋根パネル３及び受け屋根パネル４は、図９に示すように、第２野地板４１と第１垂木材３２の第１突出部３２ａとが整合する位置に上方から固定具Ａを複数打ち込むことにより連結される。そして、図１０に示すように、屋根パネル３及び受け屋根パネル４を同様の手順で水平方向に設置してゆき、第１垂木材３２の他端部３２ｂの先端に軒先母屋３４をビス固定するとともに、軒先から突出する第１垂木材３２の他端部３２ｂ及び軒先母屋３４の上部に軒先用の軒先野地板５１を設置する。そして最後に、屋根面の妻側の端部に位置する受け屋根パネル４の妻側寄りの端縁から水平下地材２の長手方向の端縁までの間に端部野地板５２を設置し、屋根構造１を完成させる。 As shown in FIG. 9, the roof panel 3 and the receiving roof panel 4 fixed on the horizontal base member 2 in this manner are aligned with the second sheathing board 41 and the first projecting portion 32a of the first rafter 32. It is connected by driving a plurality of fixtures A from above into the position where they are to be connected. Then, as shown in FIG. 10, the roof panel 3 and the receiving roof panel 4 are horizontally installed in the same procedure, and the eaves purlin 34 is fixed to the tip of the other end 32b of the first rafter 32 with screws. At the same time, the eaves edge base plate 51 for the eaves edge is installed on the other end portion 32b of the first rafter 32 projecting from the eaves edge and the upper part of the eaves purlin . Finally, an end sheathing board 52 is installed between the gable-side edge of the receiving roof panel 4 located at the gable-side edge of the roof surface and the longitudinal edge of the horizontal base member 2, Complete roof structure 1.

このように屋根構造１は、第１垂木材３２と第２垂木材４２とを一部分互い違いに配置することにより、各パネル３、４の垂木材３２、４２同士の間隔を密にすることができる。したがって、各垂木材３２、４２の端部同士を継ぐことなく各垂木材３２、４２の継ぎ目部分の構造耐力を強化することができ、施工性を大幅に向上させることができる。また、野地板及び垂木材の継ぎ目が合致しないので、構造上の弱点を補うことができ、屋根に必要な構造耐力を保持しつつも容易に施工することができる屋根構造を構築することができる。また、図示例では１つの屋根パネル３のみを使用しているが、図１１に示すように、複数の屋根パネル３の第１野地板３１同士を突き合わせて継ぎ合わせ、最も水上側に位置する屋根パネル３の第１突出部３２ａに受け屋根パネル４を固定してもよく、屋根の形状や大きさによって屋根パネル３の個数を調整することができる。 In this way, the roof structure 1 can have the rafters 32, 42 of each panel 3, 4 closely spaced from each other by partially staggering the first rafters 32 and the second rafters 42. . Therefore, the structural strength of the joints of the rafters 32, 42 can be enhanced without joining the ends of the rafters 32, 42, and the workability can be greatly improved. In addition, since the joints of sheathing boards and rafters do not match, structural weaknesses can be compensated for, and a roof structure that can be easily constructed while maintaining the necessary structural strength of the roof can be constructed. . In addition, although only one roof panel 3 is used in the illustrated example, as shown in FIG. The receiving roof panel 4 may be fixed to the first projecting portion 32a of the panel 3, and the number of roof panels 3 can be adjusted according to the shape and size of the roof.

＜第２実施形態＞
次に、本発明に係る屋根構造６の実施形態について各図を参照しつつ説明する。なお、屋根構造１と重複する構成は、同様の符号を用いて説明を省略する。屋根構造６は、図１２に示すように、複数の水平下地材２、屋根パネル３、受け屋根パネル４、及び、受け屋根パネル４よりも水上側に配置される第２屋根パネル７、を備えている。 <Second embodiment>
Next, an embodiment of the roof structure 6 according to the present invention will be described with reference to each drawing. In addition, the structure which overlaps with the roof structure 1 uses the same code|symbol, and abbreviate|omits description. The roof structure 6 comprises a plurality of horizontal substrates 2, a roof panel 3, a receiving roof panel 4, and a second roof panel 7 positioned above the receiving roof panel 4, as shown in FIG. ing.

野地板と垂木材とを一体化した複合パネルである第２屋根パネル７は、図１２に示すように、一方の端縁７１ａが第２野地板４１の他方の端縁４１ｃに突き合せて配置される第３野地板７１と、第３野地板７１の下面に互いに間隔を空けて平行に固定される複数の第３垂木材７２と、を有している。第３垂木材７２は、一端部が第３野地板７１の一方の端縁７１ａから突出しており、この突出した部分である第２突出部７２ａの突出長さＬ３は、図１に示す、隣合う水平下地材２間の間隔Ｌ１以上となっている。なお第３野地板７１の構成、及び第３垂木材７２同士の間隔は、それぞれ第１野地板３１及び第１垂木材３２と同様となっている。 As shown in FIG. 12, the second roof panel 7, which is a composite panel in which the sheathing board and the rafters are integrated, is arranged so that one edge 71a abuts against the other edge 41c of the second sheathing board 41. and a plurality of third rafters 72 fixed to the lower surface of the third sheathing board 71 in parallel and spaced apart from each other. One end of the third rafter 72 protrudes from one edge 71a of the third sheathing board 71, and the protruding length L3 of the second protruding portion 72a, which is the protruding portion, is the same as that shown in FIG. The distance L1 or more between the matching horizontal base members 2 is set. The configuration of the third sheathing board 71 and the spacing between the third rafters 72 are the same as those of the first sheathing board 31 and the first rafters 32, respectively.

次に、屋根構造６を用いた屋根構造施工方法について説明する。まず、屋根パネル３を第１実施形態と同様の手順で水平下地材２に固定する。そして、図１２に示すように、第２突出部７２ａを水下側へ向けた状態で第３垂木材７２の他端部７２ｂを棟木２２上部に載置された垂木台２ａの図外の切欠き２ｃに嵌め込み、第３垂木材７２を母屋２３に固定された垂木掛け２３ａに載置する。そして、上方から長尺ビスＢ（図示しない）を打ち込んで他端部７２ｂと棟木２２とを一体的に連結固定するとともに、第３垂木材７２の垂木掛け２３ａに当接する部分に、第３野地板７１の上方から長尺ビスＢ（図示しない）を打ち込んで順次第２屋根パネル７を水平下地材２に固定する。なおこのとき、第２屋根パネル７は、第３垂木材７２を第１垂木材３２の軒桁方向の位置と略整合させた状態で水平下地材２に設置され、また、各野地板３１、７１は、第１野地板３１と第３野地板７１との離間距離が第２野地板４１の長さと略同一となるように形状を調整されている。 Next, a roof structure construction method using the roof structure 6 will be described. First, the roof panel 3 is fixed to the horizontal base member 2 by the same procedure as in the first embodiment. Then, as shown in FIG. 12, the other end portion 72b of the third rafter 72 is attached to a cut (not shown) of the rafter base 2a placed on the upper part of the ridgepole 22 with the second projecting portion 72a directed toward the underwater side. The third rafter 72 is placed on the rafter hook 23a fixed to the purlin 23 by fitting it into the notch 2c. Then, a long screw B (not shown) is driven from above to integrally connect and fix the other end portion 72b and the ridgepole 22. Long screws B (not shown) are driven from above the ground plate 71 to sequentially fix the second roof panel 7 to the horizontal base member 2 . At this time, the second roof panel 7 is installed on the horizontal base material 2 in a state in which the third rafter 72 is substantially aligned with the position of the first rafter 32 in the eaves beam direction. The shape of 71 is adjusted so that the distance between the first sheathing board 31 and the third sheathing board 71 is substantially the same as the length of the second sheathing board 41 .

続いて、図１２に示すように、第１野地板３１及び第３野地板７１の間に位置する母屋２３に固定された垂木掛け２３ｂに受け屋根パネル４を載置する。このとき、第２垂木材４２は、一端部４２ａを第１垂木材３２の第１突出部３２ａ同士の間に配置されるとともに、他端部４２ｂを第３垂木材７２の第２突出部７２ａ同士の間に配置され、第２野地板４１の両端部４１ｂ、４１ｃをそれぞれ第１野地板３１の一方の端縁３１ｂ及び第３野地板７２の一方の端縁７１ａに突き合せる。そして、第２屋根パネル７と同様に、第２垂木材４２の垂木掛け２３ａに当接する部分に上方から長尺ビスＢ（図示しない）を打ち込んで受け屋根パネル４を水平下地材２に固定する。 Subsequently, as shown in FIG. 12, the receiving roof panel 4 is placed on the rafters 23b fixed to the purlin 23 located between the first sheathing board 31 and the third sheathing board 71. As shown in FIG. At this time, the second rafter 42 has one end portion 42 a disposed between the first projecting portions 32 a of the first rafter 32 and the other end portion 42 b disposed between the second projecting portions 72 a of the third rafter 72 . Both ends 41b and 41c of the second sheathing board 41 are butted against one edge 31b of the first sheathing board 31 and one edge 71a of the third sheathing board 72, respectively. Then, similarly to the second roof panel 7, the receiving roof panel 4 is fixed to the horizontal base member 2 by driving long screws B (not shown) from above into the portions of the second rafters 42 that contact the rafter hooks 23a. .

このようにして水平下地材２上に配置された受け屋根パネル４は、図１３に示すように、第２野地板４１の第１突出部３２ａ及び第２突出部７２ａと整合する位置に上方から固定具Ａを打ち込むことにより連結される。そして、屋根構造１と同様の手順で軒先野地板５１、軒先母屋３４、及び端部野地板５２を設置し、屋根構造６を完成させる。 As shown in FIG. 13, the receiving roof panel 4 arranged on the horizontal base member 2 in this manner is positioned to match the first projecting portion 32a and the second projecting portion 72a of the second sheathing board 41 from above. It is connected by driving the fixture A. Then, the eaves baseboard 51, the eaves purlin 34, and the end baseboard 52 are installed in the same procedure as the roof structure 1, and the roof structure 6 is completed.

このように屋根構造６は、各垂木材３２、４２、７２を一部互い違いに配置することにより、従来のように垂木材の端部に複雑な加工を施して垂木材同士を継ぎ合わせる必要がないので、長さのある大屋根であっても施工性を大幅に向上させることができる。また、野地板と垂木材の継ぎ目が合致しないので、構造上の弱点を補うことができ、屋根に必要な構造耐力を保持しつつも容易に施工することができる屋根構造を構築することができる。そして、屋根パネル３及び第２屋根パネル７によって最水下と最水上との位置決めを行った後に受けパネル４を上方から落とし込むので、軒や棟廻りの各パネルのずれを防止することができる。 Thus, in the roof structure 6, by arranging the rafters 32, 42, and 72 partially alternately, it is not necessary to join the rafters together by subjecting the ends of the rafters to complicated processing as in the conventional art. Therefore, workability can be greatly improved even for a large roof with a long length. In addition, since the joints of sheathing boards and rafters do not match, structural weaknesses can be compensated for, and a roof structure that can be easily constructed while maintaining the structural strength necessary for the roof can be constructed. . After positioning the roof panel 3 and the second roof panel 7 between the bottom and the top of the water, the receiving panel 4 is dropped from above, so that each panel around the eaves and ridge can be prevented from being displaced.

本発明の実施の形態は上述の形態に限ることなく、本発明の思想の範囲を逸脱しない範囲で適宜変更することができる。 The embodiments of the present invention are not limited to those described above, and can be modified as appropriate without departing from the spirit of the present invention.

本発明に係る屋根パネルは、木質構造の傾斜屋根を形成する際に好適に使用することができる。 INDUSTRIAL APPLICABILITY The roof panel according to the present invention can be suitably used when forming a sloped roof with a wooden structure.

１、６ 屋根構造
２ 水平下地材
３ 屋根パネル
３１ 第１野地板
３１ｂ 第１野地板の一方の端縁
３２ 第１垂木材
３２ａ 第１突出部
４ 受け屋根パネル
４１ 第２野地板
４１ｂ 第２野地板の一方の端縁
４１ｃ 第２野地板の他方の端縁
４２ 第２垂木材
４２ａ 第２垂木材の一端部
４２ｂ 第２垂木材の他端部
７ 第２屋根パネル
７１ 第３野地板
７１ａ 第３野地板の一方の端縁
７２ 第３垂木材
７２ａ 第２突出部
Ｌ１ 隣合う水平下地材同士の間隔
Ｌ２ 第１突出部の突出長さ
Ｌ３ 第２突出部の突出長さ

Reference Signs List 1, 6 Roof structure 2 Horizontal base material 3 Roof panel 31 First roof board 31b One edge of the first roof board 32 First rafter 32a First protrusion 4 Receiving roof panel 41 Second roof board 41b Second field One edge of the main board 41c The other edge of the second roof board 42 Second rafter 42a One end of the second rafter 42b The other end of the second rafter 7 Second roof panel 71 Third roof board 71a 3 One edge of roof board 72 3rd rafter 72a 2nd projecting part L1 Spacing between adjacent horizontal base materials L2 Projection length of 1st projecting part L3 Projecting length of 2nd projecting part

Claims (5)

互いに間隔を空けて平行に配置され、軒桁方向へ延びる複数の水平下地材と、
第１野地板と、前記第１野地板の下面に互いに間隔を空けて平行に固定され、少なくとも前記第１野地板の一方の端縁から突出する複数の第１垂木材と、を有し、互いに間隔を空けて平行に配置された複数の水平下地材の上部に固定される屋根パネルであって、
前記第１垂木材の前記第１野地板の端縁から突出する第１突出部の突出長さは、隣合う前記水平下地材の間隔以上である屋根パネルと、を備え、
前記屋根パネルは、前記第１突出部を水上側へ向けて前記水平下地材に固定されることを特徴とする屋根構造。 a plurality of horizontal base materials arranged in parallel with each other at intervals and extending in the eaves beam direction;
a first sheathing board; and a plurality of first rafters fixed in parallel and spaced apart from each other on the lower surface of the first sheathing board and protruding from at least one edge of the first sheathing board; A roof panel secured to the top of a plurality of spaced parallel horizontal furrings, comprising:
a roof panel in which a projection length of a first projecting portion of the first rafter projecting from the edge of the first sheathing board is equal to or greater than the interval between the adjacent horizontal base members ,
The roof structure, wherein the roof panel is fixed to the horizontal base member with the first projecting portion directed toward the water side. 一方の端縁が前記第１野地板の一方の端縁に突き合せて配置される第２野地板、及び前記第２野地板の下面に互いに間隔を空けて平行に固定され、少なくとも一端が前記第２野地板の一方の端縁に配置される複数の第２垂木材を有する受け屋根パネルを備え、
前記受け屋根パネルは、前記第２垂木材の一端部を隣合う前記第１突出部同士の間に配置して前記水平下地材に固定されることを特徴とする請求項１に記載の屋根構造。 A second sheathing board having one edge butted against one edge of the first sheathing board; a receiving roof panel having a plurality of second rafters positioned on one edge of the second sheathing board;
2. The roof structure of claim 1 , wherein said receiving roof panel is secured to said horizontal substrate with one end of said second rafter positioned between said adjacent first projections. . 一方の端縁が前記第２野地板の他方の端縁に突き合せて配置される第３野地板と、前記第３野地板の下面に互いに間隔を空けて平行に固定され、一端が前記第３野地板の一方の端縁から突出する複数の第３垂木材と、を有する第２屋根パネルと、を備え、
前記第２屋根パネルは、前記第３垂木材の前記第３野地板の端縁から突出する第２突出部を水下側へ向けて最も水上側の前記水平下地材に固定され、
前記受け屋根パネルは、前記第２垂木材の他端部を隣合う前記第２突出部同士の間に配置して前記水平下地材に固定されることを特徴とする請求項２に記載の屋根構造。 A third sheathing board arranged so that one end edge abuts the other edge of the second sheathing board, and is fixed to the lower surface of the third sheathing board in parallel with a space from each other. a second roof panel having a plurality of third rafters projecting from one edge of the three sheathing boards;
The second roof panel is fixed to the horizontal base member on the most water side with a second projecting portion projecting from the edge of the third sheathing board of the third rafter toward the underwater side,
3. The roof according to claim 2, wherein the receiving roof panel is fixed to the horizontal substrate with the other ends of the second rafters positioned between the adjacent second protrusions. structure. 請求項３に記載の屋根構造を用いた屋根構造施工方法であって、
前記第１垂木材の前記第１突出部を水上側へ向けて前記屋根パネルを前記水平下地材に固定し、
上方から前記第２野地板の一方の端縁を前記第１野地板の一方の端縁に突き合せるとともに、前記第２垂木材の一端部を前記第１突出部同士の間に配置して前記受け屋根パネルを前記水平下地材に固定し、
前記第２野地板を前記第１突出部に固定することを特徴とする屋根構造施工方法。 A roof structure construction method using the roof structure according to claim 3 ,
securing the roof panel to the horizontal substrate with the first protrusion of the first rafter facing the water side;
One edge of the second sheathing board is abutted against one edge of the first sheathing board from above, and one end of the second rafter is arranged between the first projecting parts, and the securing a receiving roof panel to the horizontal substrate;
A method for constructing a roof structure, characterized in that the second sheathing board is fixed to the first projecting portion. 前記第３垂木材の前記第２突出部を水下側へ向けて前記第２屋根パネルを最も水上の前記水平下地材に固定した後に、
上方から前記第２野地板の両端縁を、それぞれ前記第１野地板の一方の端縁及び前記第３野地板の一方の端縁に突き合せ、
第２垂木材の一端部を前記第１突出部同士の間に配置するとともに、第２垂木材の他端部を前記第２突出部同士の間に配置して前記受け屋根パネルを前記水平下地材に固定し、
前記第２野地板を前記第１突出部及び前記第２突出部に固定することを特徴とする請求項４に記載の屋根構造施工方法。 after fixing the second roof panel to the horizontal substrate most above water with the second protrusion of the third rafter facing underwater;
Both ends of the second sheathing board are butted against one edge of the first sheathing board and one edge of the third sheathing board from above,
One end of a second rafter is positioned between the first projections and the other end of the second rafter is positioned between the second projections to position the receiving roof panel on the horizontal foundation. fixed to the material,
5. The roof structure construction method according to claim 4 , wherein the second sheathing board is fixed to the first projecting portion and the second projecting portion.
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