building

Abstract

To provide a building with hipped roof and roof truss structure restraining the height of a roof surface.SOLUTION: A building 100 comprises a hip rafter 3 and roof panels 7 fixed to the hip rafter 3. The hip rafter 3 includes a T-shaped steel material in a cross section viewing along its extending direction and is placed so that its web 3a extends upward from an upper surface of a flange 3b. The roof panels 7 are fixed to lower surface parts and have fixed plate parts 72 extending downward. The fixed plate parts 72 are fixed to lateral surfaces of the web 3a.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a building.

Background Art

[0002] Patent Document 1 describes a hipped roof truss construction method for buildings (a hipped roof truss structure). In this hipped roof truss construction method for buildings, H-section steel is used for each of the planar frame-shaped eaves beam, the horizontal ridge beam arranged at a position higher than the eaves beam at the inner central portion surrounded by the eaves beam, and the hip rafter arranged in an inclined manner between the end of the ridge beam and each corner of the eaves beam. Channel steel is used for the common rafter, which is arranged in an inclined manner such that the eaves beam side is lowered in the parallel portion between the ridge beam and the eaves beam, and for the purlin arranged to span over the common rafter and the hip rafter. After the eaves beam and the ridge beam are placed on the building frame, the respective connections between the end of the ridge beam and the upper end of the hip rafter, and between the lower end of the hip rafter and the eaves beam are connected using metal plate connection fittings that overlap across the webs of the two H-section steels to be connected to each other, and bolts and nuts that fasten the overlapping portions. For the connections between the ridge beam and the upper end of the common rafter, between the lower end of the common rafter and the eaves beam, and for fixing the purlin to the common rafter and the hip rafter, connection fittings each having a plate fixed to the upper end of a threaded shaft are used. The connection fittings are attached to the top surfaces of the ridge beam, the eaves beam, the common rafter and the hip rafter with threaded shafts and nuts, and the common rafter is fastened between the ridge beam and the eaves beam, and the purlin is fastened onto the common rafter and the hip rafter using these connection fittings, bolts and nuts. In this hipped roof truss construction method, connection fittings are fixed in an upright manner to the top surface of each common rafter, purlins arranged at regular intervals in the vertical direction of the slope so as to intersect across the top surfaces of the respective common rafters are overlapped on the plates of the connection fittings, the overlapping portions are fixed with bolts and nuts to complete the hipped roof truss, and thereafter, a roof material is laid directly on the purlins, or a roof material is laid using rafters, sheathing boards and the like.

Prior Art Literature

Patent Document

[0003]

Patent Document 1

Summary of the Invention

[0004] In buildings with a hip roof truss structure assembled using conventional construction methods, as exemplified in Patent Document 1, if a panelized construction method is adopted to allow for easy roof construction without fastening roof sheathing on-site, the roof surface becomes high due to the thickness of both the steel frame and the roof frame members. In this case, it may violate the setback regulations and height restrictions under the Building Standards Act. Furthermore, if the height of the fascia board is kept constant or low from the perspective of the building's design, it becomes necessary to increase the overhang of the eaves. In this case, the area of ​​the building when viewed from above increases, which may reduce its adaptability to the site. It may also become necessary to increase the cross-section of beams and other components supporting the eaves. Therefore, there is a need for a building with a hip roof truss structure that suppresses the height of the roof surface.

[0005] This invention has been made in view of the above circumstances, and its purpose is to provide a building with a hip roof truss structure that suppresses the height of the roof surface. [Means for solving the problem]

[0006] The building according to the present invention, for achieving the above objective, Corner rafter or valley rafter, The roof panel is fixed to the aforementioned hip rafter or valley rafter, The aforementioned corner rafter or valley rafter includes a T-shaped steel member in cross-section when viewed along its extending direction, and its web is positioned to extend upward from the upper surface of the flange. The roof panel has a fixing plate portion that is fixed to the lower surface and extends downward, The fixing plate portion is fixed to the side surface of the web.

[0007] In the building according to the present invention, further, The fixing plate portion may be fixed to the side surface of the web with bolts.

[0008] In the building according to the present invention, further, The R-floor floor is further equipped with floor beams positioned around its outer perimeter. The corner rafter or valley rafter may be supported via the outer portion of the floor beam.

[0009] In the building according to the present invention, further, The roof panel may have the fixing plate portion on its outer periphery.

[0010] In the building according to the present invention, further, The roof comprises a first panel, which is a first roof panel, and a second panel, which is a second roof panel and is positioned adjacent to the first panel. The fixing plate portion of the first panel is fixed to the first side surface of the web, The fixing plate portion of the second panel may be fixed to the second side surface of the web to which the first panel is fixed.

[0011] The building according to the present invention further, The aforementioned roof panel has a mounting plate portion that bends and extends from the tip of the fixing plate portion, The mounting plate portion may be placed on the upper surface of the flange.

[0012] The building according to the present invention further, The aforementioned steel material may be CT-shaped steel. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a building with a hip roof truss structure that suppresses the height of the roof surface. [Brief explanation of the drawing]

[0014] [Figure 1] This is a perspective view of the building according to this embodiment, seen from an oblique angle above. [Figure 2] This is an explanatory diagram of the structure of the roof portion of the building according to this embodiment. [Figure 3] This is a top view of the building according to this embodiment. [Figure 4] This is a perspective view showing the support relationships between the purlin beams, purlin posts, and floor beams of the roof slab. [Figure 5] It is a perspective view of the first joining hardware. [Figure 6] It is a perspective view of the second joining hardware. [Figure 7] It is a perspective view of the roof panel as viewed diagonally from below. MODE FOR CARRYING OUT THE INVENTION

[0015] The building according to the embodiment of the present invention will be described based on the drawings.

[0016] FIG. 1 to FIG. 3 show a building 100 according to the present embodiment. FIG. 1 shows a perspective view of the building 100. FIG. 2 shows an explanatory diagram of the structure of the roof portion of the building 100. FIG. 3 shows a top view of the building 100. First, the outline of the building 100 will be described.

[0017] As shown in FIG. 1 and FIG. 2, the building 100 includes a hip rafter 3 and a roof panel 7 fixed to the hip rafter 3. As shown in FIG. 2, the hip rafter 3 includes a T-shaped steel material in cross section when viewed along its extending direction, and is arranged such that its web 3a extends upward from the upper surface of the flange 3b. The roof panel 7 has a fixed plate portion 72 that is fixed to the lower surface portion and extends downward. The fixed plate portion 72 is fixed to the side surface of the web 3a. In the present embodiment, the vertical direction is the same as the up-down direction, and the lower side or upper side in the vertical direction is hereinafter simply referred to as lower or upper.

[0018] Hereinafter, the building 100 will be described in detail.

[0019] Building 100 has a hip roof truss structure, as shown in Figure 1. A specific example of building 100 is a multi-story house with a steel frame. Building 100 may have multiple living rooms. Building 100 may consist of a reinforced concrete foundation, a frame structure composed of framing members such as columns and beams, and a superstructure fixed to the foundation, with panels forming walls and floors. The framing members and panels of building 100 can be pre-standardized. In this case, the framing members and other components can be manufactured in advance at a factory, transported to the construction site, and assembled at the building site.

[0020] The building 100 may include a ridge beam 1, four or more purlin beams 2 arranged to surround the ridge beam 1 in a top view, a roof slab F supporting each purlin beam 2 via purlin posts 20, a hip rafter 3 whose lower end is supported by the roof slab F and whose upper end is supported by the purlin beams 2, a plurality of roof panels 7 fixed to the hip rafters 3, and a lower frame A supporting the roof slab F from below. Note that Figure 1 shows only a portion of the plurality of roof panels 7 (only two in Figure 1).

[0021] Ridge beam 1 is a horizontal member placed at the highest point of the roof of building 100. As will be described later, ridge beam 1 is supported by hip rafters 3, and it is not necessary for it to be supported by ridge posts (main posts) or diagonal braces. Ridge beam 1 may be made of steel, such as an H-beam.

[0022] The R-floor slab F includes outer perimeter floor beams 4 (hereinafter sometimes referred to as floor beams 4) arranged to surround the outer perimeter, inner floor beams 5 (hereinafter sometimes referred to as floor beams 5) spanning within the area enclosed by the outer perimeter floor beams 4, and floor slabs 45 supported by the outer perimeter floor beams 4 or the inner floor beams 5. The R-floor slab F is supported by the lower structure A of the building 100, which includes the foundation and columns constructed on the foundation. The R-floor slab F may be configured as a rigid floor stiffened against horizontal forces (horizontal forces) by the floor beams 4 and 5. In the building 100, in a top view, four or more outer perimeter floor beams 4 (four in Figure 1 as an example) are arranged in a ring around the ridge beam 1 (see Figure 3). The outer perimeter floor beams 4 are so-called girder beams supported by the columns of the lower structure A.

[0023] The purlin beams 2 are horizontal members positioned lower than the ridge beam 1 on the roof of building 100 and supported by the R-story floor F. The purlin beams 2 may be made of steel, such as H-beams. In building 100, in a top view, four or more purlin beams 2 (four in Figure 1 as an example) are arranged in a ring around the ridge beam 1 (see Figure 3). Figure 1 illustrates the case where the purlin beams 21-24 are arranged in this order in a ring.

[0024] In this embodiment, the purlins 21 and 23 are arranged parallel to the ridge beam 1. The purlins 22 and 24 are arranged in a direction perpendicular to the ridge beam 1. In a top view, the purlins 21 to 24 are positioned between the ridge beam 1 and the outer floor beams 4. In a top view, the purlins 21 to 24 are spaced apart from the ridge beam 1. In a top view, the purlins 21 to 24 are spaced apart from the outer floor beams 4.

[0025] The purlin beam 2 is supported by the floor beam 5 of the R-story floor F, and is further supported by the floor beam 5 via purlin posts 20 that are erected to extend vertically. In other words, any vertical force applied to the purlin beam 2 is supported by the floor beam 5 of the R-story floor F.

[0026] It is preferable that the purlin beam 2, purlin post 20, and R-floor slab F form a structural plane that resists horizontal forces along the extension direction of the purlin beam 2. In the examples shown in Figures 1 and 4, the purlin beam 2, purlin post 20, and floor beam 5 of the R-floor slab F form the above structural plane. This structural plane may be a braced frame, a braced frame, a truss frame, or a rigid frame. Figure 4 is a perspective view illustrating the support relationship between the purlin beam 2, purlin post 20, and floor beam 5 of the R-floor slab F.

[0027] Figures 1 and 4 illustrate a case where the structural plane formed by the purlin beam 2, purlin post 20, and floor beam 5 of the R-story floor F is a braced frame structure including diagonal braces 29. That is, this structural plane is fixed to the purlin beam 2 and purlin post 20, and the diagonal braces 29 are arranged to span the structural plane parallel to and diagonally, forming a braced frame structure that resists horizontal forces along the direction of extension of the purlin beam 2.

[0028] In the example shown in Figure 1, each of the four purlins 2 arranged in a ring has a structural surface formed to resist horizontal forces along the direction of extension of each purlin 2. As a result, in building 100, these ring-shaped purlins 2 can resist forces in any direction along the horizontal.

[0029] As will be described later, the main beam 2 supports the underside of the corner rafter 3.

[0030] The hip rafter 3 is a long structural member that supports the roof panel 7 and is positioned along the slope of the roof. The hip rafter 3 is positioned along the peak of the slope on the roof of building 100. In cases where it is positioned along the peak of the slope on the roof of building 100, a valley rafter is used instead of the hip rafter 3. In the following explanation, the description of the hip rafter 3 is the same as the description of the valley rafter when the hip rafter 3 is replaced by a valley rafter.

[0031] The hip rafter 3 is positioned so as to intersect (for example, at a 45° intersection) with the purlin beam 2 when viewed from above. The hip rafter 3 is a steel material with a T-shaped cross-section when viewed along its extending direction. In this embodiment, as an example, the steel material of the hip rafter 3 is a CT-shaped steel. In this embodiment, the case where the hip rafter 3 is a CT-shaped steel is illustrated. In building 100, the hip rafter 3 is positioned so that its web 3a extends upward from the upper surface of the flange 3b.

[0032] The corner rafter 3 is supported by the purlin beam 2. Alternatively, the corner rafter 3 may be supported by the floor beam 4 located on the outer perimeter of the R-floor slab F. The corner rafter 3 may be supported by both the purlin beam 2 and the floor beam 4.

[0033] The corner rafter 3 does not require a supporting post. This makes it possible to secure a large attic space in the building 100 that is not obstructed by structures such as posts.

[0034] Now, in building 100, as described above, forces acting in any direction along the horizontal are formed in a ring shape, and the purlin beams 2 that constitute the aforementioned structural plane are able to resist them. In addition to this structure, by supporting the hip rafters 3 with the purlin beams 2, when forces acting along the vertical direction (vertical force) or horizontal forces are applied to the ridge beam 1, purlin beams 2, or hip rafters 3, these can be handled at the position of the purlin beams 2. Therefore, in building 100, it is not necessary to place structures such as braces or posts (hereinafter referred to as posts, etc.) on the hip rafters 3 that would obstruct the use of the space in the attic, or the number of posts, etc. to be placed can be reduced. As a result, the attic space of building 100 can be secured as a large space that is not obstructed by structures such as posts, etc.

[0035] Figure 1 shows a case where the corner rafter 3 is supported at the corner where a pair of adjacent purlin beams 2,2 intersect. It also shows a case where the lower end of the corner rafter 3, below the portion supported by the purlin beams 2, is supported by the floor beam 4.

[0036] The hip rafter 3 supports the ridge beam 1. In building 100, the ridge beam 1 may be supported only by multiple hip rafters 3. More specifically, the ridge beam 1 does not necessarily require ridge posts or braces (hereinafter similarly referred to as posts, etc.) to support it. Because the ridge beam 1 is supported by multiple hip rafters 3 supported by the purlin beams 2 that constitute the above-mentioned structural plane, the number of posts, etc. that support the ridge beam 1 may be reduced, or the ridge beam 1 may not have any posts, etc. to support it. Since the ridge beam 1 does not require posts, etc. such as ridge posts, or even if it is supported by posts, etc., the number of posts, etc. can be reduced, the attic space of building 100 can be secured as a large space that is not obstructed by structures such as posts, etc. In other words, a large attic space can be secured in building 100.

[0037] As shown in Figure 2, in the hip rafter 3, the web 3a of the CT-shaped steel is on the lower side and the flange 3b is on the upper side, and it is supported by the purlin beam 2 and floor beam 4. In other words, the web 3a of the CT-shaped steel of the hip rafter 3 is positioned to extend upward from the upper surface of the flange 3b. Figure 2 is a schematic diagram of the cross section (section II-II in Figure 1) of the hip rafter 3 and roof panels 7,7, viewed along the extension direction of the hip rafter 3, in order to explain the structure of the roof portion of building 100.

[0038] The hip rafter 3 supports the ridge beam 1 at its upper end. In this embodiment, the upper ends of a pair of hip rafters 3,3 are connected to one end of the ridge beam 1 in the extending direction, supporting one end of the ridge beam 1. In addition, the upper ends of a pair of hip rafters 3,3 separate from the pair supporting one end of the ridge beam 1 are connected to the other end of the ridge beam 1, supporting the other end of the ridge beam 1.

[0039] In the example shown in Figure 1, a pair of hip rafters 31 and 34 support one end of the ridge beam 1, and another pair of hip rafters 32 and 33 support the other end of the ridge beam 1. Thus, the ridge beam 1 is supported by four hip rafters 3 as an example. The hip rafters 3 are supported by the floor beams 4 and the purlin beams 2, as described above. The purlin beams 2 are supported by the floor beams 5. In other words, the ridge beam 1 is supported by the R-floor slab F via the hip rafters 3.

[0040] In building 100, one end of the hip rafters 31 and 34 and the ridge beam 1 forms a three-dimensional truss. The other end of the hip rafters 32 and 33 and the ridge beam 1 also forms a three-dimensional truss. This three-dimensional truss, formed by the ends of the hip rafters 3 and the ridge beam 1, allows building 100 to resist horizontal forces with great strength.

[0041] The hip rafter 3 is connected to the ridge beam 1, the purlin beam 2, and the floor beam 4 by connecting hardware, supporting the ridge beam 1, and may also be supported by at least one of the purlin beam 2 and the floor beam 4. As a result, vertical forces applied to the ridge beam 1 and the hip rafter 3 are transmitted from the hip rafter 3 to the purlin beam 2 and then to the floor beam 5, or from the hip rafter 3 to the floor beam 4, that is, from the hip rafter 3 to the R-floor floor F.

[0042] Figure 5 shows a first connecting hardware 61 that joins the hip rafter 3 and the ridge beam 1. The first connecting hardware 61 may have a base portion 61a fixed to the end of the ridge beam 1 in the extending direction, and a plate portion 61b having a plate surface that supports the bottom surface of the hip rafter 3 (the lower surface of the flange 3b). In Figure 5, plate portions 61b, 61b are fixed to two adjacent sides of a rectangular column portion 61c fixed on the base portion 61a, respectively, so as to incline downward as they move away from the base portion 61a. As a result, the first connecting hardware 61 enables the hip rafter 3 to support the end of the ridge beam 1, and to have the hip rafter 3 extending in an inclined downward direction from the end of the ridge beam 1. The flange 3b and the plate portion 61b may be joined using one or more bolts. The ridge beam 1 and the base portion 61a may also be joined using one or more bolts.

[0043] Figure 6 shows a second connecting hardware 62 that connects the hip rafter 3, the ridge beam 1, and the floor beam 4. The second connecting hardware 62 may have a base portion 62a fixed to the end of the floor beam 4 in the extending direction, and a plate portion 62b having a plate surface that supports the bottom surface (lower surface of flange 3b) of the hip rafter 3. Figure 6 illustrates a case where the second connecting hardware 62 further has a support plate portion 62c that extends from the side of the base portion 62a and intersects perpendicularly with the lower surface of the plate portion 62b. The plate portion 62b is fixed to the base portion 62a so as to slope downward as it moves away from the base portion 62a. As a result, the second connecting hardware 62 enables the hip rafter 3 to be supported at the end of the floor beam 4, and to be arranged in a way that it extends in a diagonally downward direction. The base portion 62a may be supported at the corner where the floor beams 4, 4 intersect, and on the outer side of the R-floor floor F (floor beam 4). In this embodiment, "outside" refers to the outside of the building 100 as seen from above in Figure 1. The flange 3b and the plate portion 62b may be joined using one or more bolts. Similarly, the floor beam 4 and the base portion 62a may also be joined using one or more bolts.

[0044] The purlin beam 2 and the hip rafter 3 may be joined using a second connecting fitting 62 or a similar connecting fitting, although this is not shown in the diagram. That is, the connecting fitting that joins the purlin beam 2 and the hip rafter 3 may have a base that is fixed to the end of the purlin beam 2 in the extending direction, and a plate portion that has a plate surface that supports the bottom surface (lower surface of flange 3b) of the hip rafter 3. The connecting fitting that joins the purlin beam 2 and the hip rafter 3 may be supported at the corner where the purlin beams 2, 2 intersect, and on the outer side of the purlin beam 2.

[0045] The roof panels 7 shown in Figures 1 and 2 are units that constitute the roof of building 100. When building 100 is constructed, the roof panels 7 may be pre-assembled at a location other than the construction site where building 100 is to be built, for example, in a factory. After pre-assembly, the roof panels 7 may be transported to the construction site where building 100 is to be built and used in the construction of building 100. In building 100, the roof panels 7 are fixed to the corner rafters 3.

[0046] Figure 7 shows an example of a specific roof panel 7. Figure 7 is a perspective view of the roof panel 7 from a diagonal downward angle.

[0047] The roof panel 7 includes roof sheathing 70a and rafters 70b, and has a roof board portion 70 that serves as a cover for the upper part of the building 100, and fasteners L that are pre-fixed to the lower surface of the upper side of the roof board portion 70 and are fixed to the hip rafters 3 when the building 100 is constructed. The roof panel 7 may have a fascia board 70c on the lower side of the roof board portion 70. The roof of the building 100 may be composed of multiple roof panels 7 arranged adjacent to each other. The rafters 70b are elongated members that support the roof sheathing 70a in the roof panel 7. The rafters 70b may be supported only by the purlins 2 and floor beams 4 in the building 100.

[0048] The fastener L may be a long, elongated member arranged along the outer periphery of the roof panel 70. As shown in Figure 2, when the roof panel 7 is fixed to the hip rafter 3, the fastener L is positioned on the outer periphery of the roof panel 70 in a location along the hip rafter 3. In other words, when the roof panel 7 is fixed to the hip rafter 3, the fastener L is positioned so that its longitudinal direction extends along the hip rafter 3.

[0049] The fastener L may have a fixing plate portion 72 that extends downward from the roof panel portion 70. The fixing plate portion 72 may be fixed to the side of the web 3a of the hip rafter 3. In other words, the fixing plate portion 72 is positioned so that its plate surface is aligned with the web 3a of the hip rafter 3. By fixing the fixing plate portion 72 to the side of the web 3a, the vertical distance between the roof panel 7 and the hip rafter 3 is reduced, which suppresses the height of the roof surface in the building 100, that is, it is possible to keep the height of the roof from the R floor F low.

[0050] In building 100, the roof height from the R floor F can be kept low, thus reducing the roof area (area of ​​building 100) when viewed from above. This reduces the land area required to construct building 100. In other words, building 100 has increased site adaptability. Furthermore, because the roof area (area of ​​building 100) when viewed from above can be reduced, the construction cost of the roof can be reduced.

[0051] In building 100, the height of the roof from the R floor F can be kept low, which allows for a lower height for the fascia board 70c. This enhances the aesthetic appeal of building 100.

[0052] In building 100, the height of the roof from the R-floor F can be kept low, which allows for a shorter overhang of the roof eaves (the distance from the side wall of building 100 to the fascia board 70c). This reduces the load on the floor beam 4 to support the roof eaves, thus enabling a cost reduction for the floor beam 4.

[0053] The fixing plate portion 72 may be fixed to the web 3a with bolts B, for example, by bolts that pass through both the fixing plate portion 72 and the web 3a. By fixing the fixing plate portion 72 to the side of the web 3a, the roof panel 7 is fixed to the hip rafter 3.

[0054] In this embodiment, the fastener L may have a support plate portion 71 fixed to the roof plate portion 70 along the lower surface of the roof plate portion 70, the aforementioned fixing plate portion 72 extending downward from the support plate portion 71 to the roof plate portion 70, and a mounting plate portion 73 extending inward from the tip of the fixing plate portion 72 in the in-plane direction of the roof plate portion 70. The support plate portion 71, the fixing plate portion 72, and the mounting plate portion 73 may be integrally molded by bending a long plate material, providing two folds along the longitudinal direction, so that the cross-section viewed along the extending direction of the corner rafter 3 becomes an angular U-shape.

[0055] In the fastener L, the support plate portion 71 is fixed to the roof plate portion 70 by aligning its plate surface with the underside of the roof plate portion 70.

[0056] With the fastener L, when the roof panel 7 is placed on the hip rafter 3 and secured, the mounting plate portion 73 is placed on the upper surface of the flange 3b. This makes it easier to place and secure the roof panel 7 on the hip rafter 3.

[0057] As shown in Figures 1 and 2, separate roof panels 7, 7 may be fixed to both sides of the web 3a (see Figure 2) of the hip rafter 3. Figures 1 and 2 show a case where the building 100 has a first roof panel 7A, which is a first roof panel 7, and a second roof panel 7B, which is a second roof panel 7 positioned adjacent to the first panel 7A. In this case, as shown in Figure 2, at the abutment C where the first panel 7A and the second panel 7B are adjacent, the shape of the upper surface of the roof becomes a ridge along the extending direction of the hip rafter 3. That is, at the abutment C, the outer surface of the roof becomes convex. At the abutment C, the fixing plate portion 72 of the first panel 7A is fixed to the first side of the web 3a. The fixing plate portion 72 of the second panel 7B is fixed to the second side of the web 3a to which the first panel 7A is fixed.

[0058] As described above, it is possible to provide a building with a hip roof truss structure that limits the height of the roof surface.

[0059] [Another embodiment] (1) In the above embodiment, the case in which the roof panel 7 is supported by the hip rafters 3 was described as an example. However, the roof panel 7 may be supported by the hip rafters 3 and the valley rafters, or by the valley rafters alone.

[0060] (2) In the above embodiment, the case in which there are four corner rafters 3 was described. However, there may be five or more corner rafters 3 and valley rafters.

[0061] (3) In the above embodiment, the case in which all (four) corner rafters 3 are supported by floor beams 4 has been described. However, the building 100 may have corner rafters 3 or valley rafters that are supported by at least the main beams 2 but not by the floor beams 4.

[0062] (4) In the above embodiment, when separate roof panels 7, 7 are fixed to both sides of the web 3a of the hip rafter 3, the shape of the upper side of the roof at the abutment C is described as a ridge along the extending direction of the hip rafter 3. However, when separate roof panels 7, 7 are fixed to both sides of the web of a valley rafter instead of the hip rafter 3, the shape of the upper side of the roof at the abutment C is a valley along the extending direction of the valley rafter.

[0063] Furthermore, the configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, as long as no inconsistencies arise. Moreover, the embodiments disclosed herein are illustrative, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the object of the present invention. [Industrial applicability]

[0064] This invention can be applied to buildings. [Explanation of Symbols]

[0065] 1: Ridge beam 100: Building 2: Main beam 20: Main building bundle 21: Main house 22: Main house 23: Main house 24: Main house 29 :Face 3: Sumiki 31: Sumiki 32: Sumiki 33: Sumiki 34: Sumiki 3a: Web 3b: Flange 4:Outer floor beam (floor beam) 45: Floorboards 5:Inner floor beam (floor beam) 61: First Joining Hardware 61a: base 61b: Plate part 61c: Prismatic section 62: Second connecting hardware 62a: base 62b: Plate part 62c: Support plate part 7: Roof Panels 70: Roof panel section 70a: Field board 70b: Rafters 71: Support plate part 72: Fixed plate part 73: Mounting plate section 7A: First Panel 7B: Second Panel A: Lower structure B: Bolt C: Butt joint F: Floor L: Fixture

Claims

1. Corner rafter or valley rafter, The roof panel is fixed to the aforementioned hip rafter or valley rafter, The aforementioned corner rafter or valley rafter includes a steel member with a T-shaped cross-section when viewed along its extending direction, and its web is positioned to extend upward from the upper surface of the flange. The roof panel has a fixing plate portion that is fixed to the lower surface and extends downward, The aforementioned fixing plate portion is a building fixed to the side surface of the web.

2. The building according to claim 1, wherein the fixing plate portion is fixed to the side surface of the web with bolts.

3. The R-floor floor is further equipped with floor beams positioned around its outer perimeter. The building according to claim 1 or 2, wherein the corner rafter or valley rafter is supported via the outer portion of the floor beam.

4. The building according to claim 1 or 2, wherein the roof panel has the fixing plate portion on its outer periphery.

5. The roof comprises a first panel, which is a first roof panel, and a second panel, which is a second roof panel and is positioned adjacent to the first panel. The fixing plate portion of the first panel is fixed to the first side surface of the web, The building according to claim 4, wherein the fixing plate portion of the second panel is fixed to the second side surface of the web to which the first panel is fixed.

6. The aforementioned roof panel has a mounting plate portion that bends and extends from the tip of the fixing plate portion, The building according to claim 1 or 2, wherein the mounting plate portion is placed on the upper surface of the flange.

7. The building according to claim 1 or 2, wherein the steel material is CT-shaped steel.

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