JP7533539B2 - Connecting structures and building roofs - Google Patents

Description

This disclosure relates to a connection structure and a roof for a building.

The following roof is known as an example of a roof. The roof comprises two frame members, a gradient beam hung on the two frame members, and rafters hung on the two frame members. The frame members are, for example, beams or columns on which the gradient beam is hung. In one example, the gradient beam is connected to the frame members by metal fittings (for example, Patent Document 1). In the gradient beam connection structure described in Patent Document 1 (hereinafter, the conventional connection structure), the gradient beam and the frame members are connected so that the bottom surface of the gradient beam is located below the top surface of the frame members.

JP 2004-52464 A

However, in a roof, the rafters are hung above the frame members. Therefore, when the gradient beams are connected to the frame members using the conventional connection structure described in Patent Document 1, the gradient beams are located below the rafters. This makes it difficult to slim down the roof.

(1) A connection structure that solves the above problem includes a first connection structure that connects the lower end of a first gradient beam and a first frame member, the first connection structure having a first metal fitting that contacts a first end face of the lower end of the first gradient beam, and the first metal fitting connects the first gradient beam and the first frame member such that the lower surface of the first gradient beam is positioned above the upper surface of the first frame member.

With this configuration, the bottom surface of the first gradient beam is located above the top surface of the first frame member, so the first gradient beam can be positioned higher than gradient beams in conventional connection structures. By positioning the first gradient beam higher, the thickness of the roof can be made thinner. In this way, the roof can be made slimmer.

(2) In the connection structure described in (1) above, the first metal fitting includes a first connection surface that contacts the first end surface, and a second connection surface that contacts the upper surface of the first frame member and perpendicularly intersects with the first connection surface. With this configuration, the first metal fitting can contact the first gradient beam and the first frame member, so that the first gradient beam and the first frame member can be reliably connected by the first metal fitting.

(3) In the connection structure described in (2) above, a first connection portion is formed on the first connection surface to be inserted into a slit formed in the first end surface. With this configuration, the first connection portion is inserted into the slit to restrict movement of the first gradient beam relative to the first fitting, so that the first gradient beam and the first frame member can be connected in an accurate positional relationship.

(4) In the connection structure described in (2) or (3) above, a second connection part is formed on the second connection surface to be inserted into a through hole formed in the upper surface of the first frame member. With this configuration, the second connection part is inserted into the through hole to restrict movement of the first metal fitting relative to the first frame member, so that the first gradient beam and the first frame member can be connected in an accurate positional relationship.

(5) The connection structure described in any one of (1) to (4) above further includes a second connection structure that connects the upper end of the first gradient beam and a second frame member arranged parallel to the first frame member, and the second connection structure includes a second metal fitting that contacts a second end face of the upper end of the first gradient beam, the second end face being an end face opposite to the first end face, and the second connection structure includes a structure in which the first gradient beam and the second frame member are connected by the second metal fitting so that at least a part of the second end face is located above the upper surface of the second frame member. According to this configuration, the first connection structure and the second connection structure allow the first gradient beam to be positioned higher from the upper end to the lower end of the first gradient beam than the gradient beam of a conventional connection structure, thereby slimming down the roof.

(6) A roof of a building, comprising the connection structure described in any one of (1) to (5) above. With this configuration, the first gradient beam can be positioned higher than the gradient beam of a conventional connection structure, thereby slimming down the roof.

(7) A roof of a building that solves the above problem is a roof of a building that includes a first frame member, a second frame member arranged parallel to the first frame member, a first gradient beam connected to the first frame member and the second frame member, and a rafter arranged parallel to the first gradient beam, and the first gradient beam is connected to the first frame member and the second frame member such that the upper surface of the first gradient beam is located above the lower surface of the rafter.

According to this configuration, the first gradient beam is positioned so that the upper surface of the first gradient beam is located above the lower surface of the rafter, so that when the first gradient beam and the rafter are viewed from a direction along the first frame member, at least a portion of the rafter overlaps with the first gradient beam. Therefore, the thickness of the roof due to the first gradient beam and the rafters can be reduced, resulting in a slimmer roof.

(8) The roof of the building described in (7) above, wherein the first gradient beam is connected to the first frame member and the second frame member so that the upper surface of the first gradient beam is located at the same height as the upper surface of the rafter.

With this configuration, if the vertical dimension of the first gradient beam is greater than the vertical dimension of the rafter, the entire vertical dimension of the rafter overlaps with the first gradient beam when viewed from the direction along the first frame member. This further slims down the roof structure. Also, with this configuration, sheathing can be attached to the first gradient beam and the rafter, improving the rigidity of the roof.

(9) The roof of the building described in (7) or (8) above further includes a second gradient beam arranged parallel to the first gradient beam, and the second gradient beam is connected to the first frame member and the second frame member so that the upper surface of the second gradient beam is located below the upper surface of the rafters. With this configuration, the roof can have parts that can be slimmed down and parts that cannot be slimmed down by including a second gradient beam that is arranged differently from the first gradient beam.

(10) The roof of the building described in (9) above further comprises a gable member arranged to intersect with the second gradient beam and supported by the second gradient beam. With this configuration, the gable member can be supported by the second gradient beam. The structure in which the gable member is supported by the second gradient beam allows the gable to be made larger.

The connection structure and building disclosed herein can slim down the roof.

FIG. 2 is a perspective view of the building according to the first embodiment. FIG. 2 is a perspective view of the roof framework of the building of FIG. 1 . FIG. 3 is a plan view of the roof framework of FIG. 2 . 4 is a cross-sectional view of the roof framework taken along line 4-4 in FIG. 3. FIG. 2 is a side view of the connection structure according to the first embodiment. FIG. 2 is a plan view of the connection structure according to the first embodiment. FIG. FIG. FIG. 11 is an oblique view of the roof framework of a building according to the second embodiment. FIG. 1 is a perspective view of a conventional roof framework of a building. A cross-sectional view of the roof framework taken along line 11-11 in Figure 10.

First Embodiment
A connection structure 20 and a roof 1 of a building 2 according to a first embodiment will be described with reference to FIGS. 1 to 8, 10, and 11. FIG.

<Buildings>
With reference to FIG. 1, a building 2 having a roof 1 is described.
As shown in FIG. 1, the roof 1 is the roof 1 of the building 2. The building 2 includes a pilotis 3 having a pilotis space PS. The pilotis space PS is provided under the roof 1. The pilotis space PS is provided outside the building 2. In a plan view, the pilotis space PS includes a space surrounded by a first column 4A, a second column 4B, a third column 4C, and a fourth column 4D. In a plan view, the third column 4C and the fourth column 4D are arranged so that a line connecting the third column 4C and the fourth column 4D is parallel to a line connecting the first column 4A and the second column 4B. The pilotis 3 may be configured as a veranda, a terrace, a balcony, or an entrance porch. The use of the pilotis 3 is not limited to these examples.

<Roof>
The configuration of the roof 1 of the building 2 will be described with reference to Figures 2, 3 and 5.
As shown in Figures 2 and 3, the roof 1 includes a first frame member 5, a second frame member 6, a first gradient beam 7, and a rafter 8. The first frame member 5, the second frame member 6, the first gradient beam 7, and the rafter 8 are made of, for example, wood. In this embodiment, the first frame member 5 is a horizontal beam that connects the third column 4C and the fourth column 4D. The second frame member 6 is disposed at a higher position than the first frame member 5. The second frame member 6 is disposed parallel to the first frame member 5. In this embodiment, the second frame member 6 is a horizontal beam that connects the first column 4A and the second column 4B.

The roof 1 is provided on the building 2 so as to be inclined. The first frame member 5 is disposed on the lower side of the inclination of the roof 1. The second frame member 6 is disposed on the upper side of the inclination of the roof 1. If the roof 1 has a gable roof structure as shown in FIG. 1, the second frame member 6 may correspond to the ridgepole 2A of the building 2. If the roof 1 is configured as a shed, the second frame member 6 may correspond to a beam disposed at the connection point between the roof 1 and the exterior wall of the building 2.

The first gradient beam 7 is connected to the first frame member 5 and the second frame member 6. The first gradient beam 7 is arranged so as to extend diagonally upward from the first frame member 5 to the second frame member 6 when viewed from the first direction D1. The first direction D1 is a direction along the first frame member 5. The rafter 8 is arranged parallel to the first gradient beam 7. The rafter 8 is arranged so as to be hung on at least one of the first frame member 5 and the second frame member 6 when viewed from the first direction D1.

5, the first gradient beam 7 includes a first end face 9 and a second end face 10. The first end face 9 is an end face located on the lower side when the first gradient beam 7 is connected to the first frame member 5. The first end face 9 is a face facing the horizontal direction DH when the first gradient beam 7 is connected to the first frame member 5. The horizontal direction DH is a direction perpendicular to the first direction D1 and the up-down direction. The first end face 9 does not face the side of the first frame member 5 when the first gradient beam 7 is connected to the first frame member 5. The second end face 10 is an end face located on the upper side when the first gradient beam 7 is connected to the second frame member 6. The second end face 10 is an end face opposite to the first end face 9. The second end face 10 is a face facing the opposite direction to the first end face 9 when the first gradient beam 7 is connected to the second frame member 6. A portion of the second end surface 10 faces the second frame member 6 when the first gradient beam 7 is connected to the second frame member 6.

As shown in FIG. 2, the roof 1 includes a first connecting beam 11. The first connecting beam 11 is made of, for example, wood. The first connecting beam 11 is connected to the side of the first gradient beam 7 so that the upper surface of the first connecting beam 11 is flush with the upper surface 7A of the first gradient beam 7 and the lower surface of the first connecting beam 11 is flush with the lower surface 7B of the first gradient beam 7. The first connecting beam 11 increases the degree of freedom in the configuration of the roof 1. The first connecting beam 11 may be omitted.

In one example, the rafters 8 include a first rafter 8A and a second rafter 8B. The first rafter 8A is arranged so that it can be hung on the first frame member 5 and the second frame member 6. The second rafter 8B is arranged so that it can be hung on the first frame member 5 and the first tie beam 11 without being hung on the second frame member 6. The second rafter 8B may be arranged so that it can be hung on the second frame member 6 without being hung on the first frame member 5.

As shown in FIG. 5, the roof 1 comprises a sheathing board 12 and a ceiling member 13. The sheathing board 12 is attached to the upper surface 7A of the first gradient beam 7 and the upper surface 8C of the rafters 8. A roofing material is attached to the upper surface of the sheathing board 12. The ceiling member 13 is placed below the first gradient beam 7 along the first reference line R1 and forms the underside of the roof 1. The first reference line R1 is set according to the underside 7B of the first gradient beam 7. The ceiling member 13 is attached to the first gradient beam 7 to form the ceiling of the piloti space PS. The ceiling member 13 includes, for example, a decorative panel.

Figure 4 shows a cross-sectional view taken along line 4-4 in Figure 3. The first gradient beam 7 is connected to the first frame member 5 and the second frame member 6 so that the upper surface 7A of the first gradient beam 7 is located above the lower surface 8D of the rafter 8. In this embodiment, the first gradient beam 7 is connected to the first frame member 5 and the second frame member 6 so that the upper surface 7A of the first gradient beam 7 is located at the same height as the upper surface 8C of the rafter 8. As shown in the cross-sectional view of Figure 4, the upper edge of the cross section of the first gradient beam 7 and the upper edge of the cross section of the rafter 8 coincide with the imaginary line R. The imaginary line R is the line along which the sheathing board 12 is arranged. As shown in Figure 4, the dimension L1 of the first gradient beam 7 in the vertical direction is greater than the dimension L2 of the rafter 8 in the vertical direction.

As shown in FIG. 4, the dimension L3 of the first gradient beam 7 in the first direction D1 is larger than the dimension L4 of the rafter 8 in the first direction D1. In this embodiment, the edge of the sheathing board 12 in the first direction D1 is arranged on the first gradient beam 7. According to this arrangement, since the dimension L3 of the first gradient beam 7 is larger than the dimension L4 of the rafter 8, the dimensional error of the sheathing board 12 in the first direction D1 is more easily absorbed than when the edge of the sheathing board 12 is arranged on the rafter 8. Specifically, the sheathing board 12 is arranged so that the edge of the sheathing board 12 in the first direction D1 is located on the first gradient beam 7. In this case, the overlap area when the edge of the sheathing board 12 is arranged to be located on the first gradient beam 7 can be made larger than the overlap area when the edge of the sheathing board 12 is arranged to be located on the rafter 8. It is preferable that the overlap area when the edge of the sheathing board 12 is arranged to be located on the first gradient beam 7 is large as an area for driving screws. Therefore, by placing the edge of the sheathing board 12 on the first gradient beam 7, it is easy to ensure an area for driving screws into the sheathing board 12.

The function of the roof 1 of the building 2 of this embodiment will be described.
10 and 11 show the roof framework of a roof 60 to which a slope beam 62 is attached by a conventional connection structure. In the conventional roof 60, the end face of the lower end of the slope beam 62 is connected to the side of the frame member 63. The rafters 64 are arranged to rest on the frame member 63. Therefore, at the lower end of the slope beam 62, the lower surface of the slope beam 62 is located below the upper surface of the frame member 63, and the upper surface of the slope beam 62 is located at the same height as the lower surface of the rafters 64. In this way, in the conventional roof 60, the positions of the rafters 64 and the slope beams 62 are significantly misaligned in the vertical direction. For this reason, in the conventional structure, the thickness of the roof 60 as viewed from the fourth direction D4 cannot be made smaller than the sum of the dimension L5 of the slope beam 62 in the vertical direction and the dimension L6 of the rafters 64 in the vertical direction. The fourth direction D4 corresponds to the first direction D1 in FIG. 2.

In the roof 1 of this embodiment, the first gradient beam 7 is connected to the first frame member 5 so that the lower surface 7B of the first gradient beam 7 is located above the upper surface 5A of the first frame member 5 at the lower end of the first gradient beam 7. As a result, the upper surface 7A of the first gradient beam 7 is located above the lower surface 8D of the rafter 8. Therefore, as viewed from the first direction D1, at least a part of the rafter 8 overlaps with the first gradient beam 7. Therefore, according to this configuration, the thickness of the roof 60 can be made thinner than that of the conventional roof 60 by the amount of the rafter 8 that overlaps with the first gradient beam 7 in the vertical direction. Furthermore, the upper surface 7A of the first gradient beam 7 may be located at the same height as the upper surface 8C of the rafter 8. In this case, as viewed from the first direction D1, the entire rafter 8 in the vertical direction overlaps with the first gradient beam 7. Therefore, according to this configuration, the thickness of the roof 1 can be made thinner than that of the conventional roof 60 by the amount of the dimension L2 of the rafter 8.

In a conventional roof 60, the sheathing boards are attached only to the rafters 64. Because the upper surfaces of the slope beams 62 are located at the same height as the lower surfaces of the rafters 64, the conventional roof 60 is structured in such a way that the sheathing boards cannot be attached to the slope beams 62. In contrast, in the roof 1 of this embodiment, the upper surfaces 7A of the first slope beams 7 are located at the same height as the upper surfaces 8C of the rafters 8, so the sheathing boards 12 can be attached to the first slope beams 7 and the rafters 8. Because the sheathing boards 12 can be attached to the first slope beams 7, which are the roof skeleton, the rigidity of the roof 1 is improved.

<Connection structure>
4 to 6, the connection structure 20 of the first gradient beam 7 will be described. The connection structure 20 includes a first connection structure 22 that connects the lower end of the first gradient beam 7 and the first frame member 5.

5 and 6, in the roof 1, the first gradient beam 7 is offset upward relative to the first frame member 5 and the second frame member 6 by the connection structure 20. By offsetting the first gradient beam 7 upward, the first gradient beam 7 is positioned so that the second reference line R2 is located between the upper surface 7A and the lower surface 7B of the first gradient beam 7 when viewed from the first direction D1. The second reference line R2 is a line along the lower surface 8D of the rafter 8 when the rafter 8 is hung on the first frame member 5 and the second frame member 6 when viewed from the first direction D1. In the conventional roof 60 as shown in FIG. 10, when viewed from the direction corresponding to the first direction D1, the upper surface of the gradient beam 62 coincides with the line corresponding to the second reference line R2.

The first connection structure 22 includes a first metal fitting 21. The first connection structure 22 includes a structure in which the lower end of the first gradient beam 7 and the first frame member 5 are connected by the first metal fitting 21. The first metal fitting 21 has a portion that contacts the first end surface 9 of the lower end of the first gradient beam 7. The first metal fitting 21 supports the first end surface 9 of the lower end of the first gradient beam 7. The first connection structure 22 connects the first gradient beam 7 to the first frame member 5 so that the lower surface 7B of the first gradient beam 7 is located above the upper surface 5A of the first frame member 5. When viewed from the first direction D1, the lower surface 7B of the first gradient beam 7 is separated from the upper surface 5A of the first frame member 5 by a predetermined distance. In this embodiment, the first connection structure 22 connects the first gradient beam 7 and the first frame member 5 so that the first end surface 9 does not face the first frame member 5.

The connection structure 20 further includes a second connection structure 24 that connects the upper end of the first gradient beam 7 and the second frame member 6. The connection structure 20 includes a second metal fitting 23. The second connection structure 24 includes a structure in which the first gradient beam 7 and the second frame member 6 are connected by the second metal fitting 23. The second metal fitting 23 has a portion that contacts the second end face 10 at the upper end of the first gradient beam 7. The second metal fitting 23 supports the second end face 10 at the upper end of the first gradient beam 7. The first gradient beam 7 is connected to the second frame member 6 by the second connection structure 24 so that at least a portion of the second end face 10 is located above the upper surface 6A of the second frame member 6 when viewed from the first direction D1. In this embodiment, the first gradient beam 7 and the second frame member 6 are connected by the second connection structure 24 so that the lower portion of the second end face 10 faces the side surface of the second frame member 6 when viewed from the first direction D1.

The operation of the connection structure 20 of this embodiment will be described.
In the roof 1 of this embodiment, at the lower end of the first gradient beam 7, the lower surface 7B of the first gradient beam 7 is located above the upper surface 5A of the first frame member 5 by the first connection structure 22. Therefore, the lower end of the first gradient beam 7 is located at a higher position than the lower end of the gradient beam 62 of the conventional connection structure. Also, according to the first connection structure 22 and the second connection structure 24, the first gradient beam 7 is located at a higher position than the gradient beam 62 of the conventional connection structure from the lower end to the upper end of the first gradient beam 7. Therefore, the ceiling member 13 can be located at a higher position, so that the thickness of the roof 1 can be made thinner than that of the conventional roof 60.

<First metal fitting>
5 to 8, a first metal fitting 21 for realizing the first connection structure 22 will be described. The first metal fitting 21 connects the first gradient beam 7 and the first frame member 5 such that the lower surface 7B of the first gradient beam 7 is located above the upper surface 5A of the first frame member 5.

As shown in FIG. 7, the first fitting 21 includes a first connection surface 25 and a second connection surface 26. The first connection surface 25 is configured to contact the first end surface 9 at the lower end of the first gradient beam 7. The second connection surface 26 is configured to contact the upper surface 5A of the first frame member 5. The second connection surface 26 intersects perpendicularly with the first connection surface 25. The second connection surface 26 intersects perpendicularly with the first connection surface 25 at the lower end of the first connection surface 25. The first connection surface 25 and the second connection surface 26 are formed continuously.

As shown in FIG. 5, the first metal fitting 21 includes a first body portion 27. The first body portion 27 is made of iron, stainless steel, or the like. The first body portion 27 includes a first portion 27A where the first connection surface 25 is formed, and a second portion 27B where the second connection surface 26 is formed. The first portion 27A is a plate-shaped member. The second portion 27B is a plate-shaped member. The first portion 27A and the second portion 27B may be formed by bending a single plate-shaped member, or may be formed by joining two plate-shaped members by welding.

7, the first metal fitting 21 includes a first support portion 28A and a second support portion 28B. The first support portion 28A and the second support portion 28B support the first portion 27A so that the first portion 27A is disposed perpendicular to the second portion 27B. The first support portion 28A and the second support portion 28B are disposed so as to be aligned in the second direction D2. The second direction D2 is a direction parallel to the first connection surface 25 and the second connection surface 26. When the first metal fitting 21 connects the first gradient beam 7 and the first frame member 5, the second direction D2 coincides with the first direction D1. The first support portion 28A and the second support portion 28B are made of iron, stainless steel, or the like, and are joined to the first body portion 27 by welding or the like.

6, the first fitting 21 further includes a first connection portion 29. The first connection portion 29 is formed on the first connection surface 25. The first connection portion 29 is inserted into a slit 9A formed on the first end surface 9 at the lower end of the first gradient beam 7. By inserting the first connection portion 29 into the slit 9A, the movement of the first gradient beam 7 in the first direction D1 relative to the first fitting 21 is restricted. As shown in FIG. 7, the first connection portion 29 is removably attached to the first portion 27A by a bolt and a nut. Since the first connection portion 29 is detachable from the first portion 27A, the size and shape of the first connection portion 29 can be selected according to the dimensions of the first gradient beam 7. The first connection portion 29 may be formed integrally with the first portion 27A.

The first connection portion 29 includes a first connection portion 29A and a second connection portion 29B. The first connection portion 29A and the second connection portion 29B are formed of plate-like members whose thickness direction coincides with the second direction D2 when the first gradient beam 7 and the first frame member 5 are connected. The first connection portion 29A and the second connection portion 29B are arranged so as to be aligned with a gap in the second direction D2. The first connection portion 29A and the second connection portion 29B are formed so as to extend obliquely upward from the first connection surface 25 along the first gradient beam 7 when the first gradient beam 7 and the first frame member 5 are connected. The first connection portion 29 may include other members in addition to or instead of the first connection portion 29A and the second connection portion 29B, as long as the first connection portion 29 can restrict the movement of the first gradient beam 7 in a direction parallel to the first frame member 5 relative to the first fitting 21. An example of the other members is an axis member.

The first connection portion 29 includes a first through hole 30. The first through hole 30 is formed in the first connection portion 29A and the second connection portion 29B. The first through hole 30 is configured so that the first support pin 30A is inserted when the first connection portion 29 is inserted into the slit 9A at the lower end of the first gradient beam 7. The first support pin 30A is, for example, a drift pin. When the first connection portion 29 is inserted into the slit 9A, the first support pin 30A is inserted into the first through hole 30, so that the first connection portion 29 is firmly attached to the first gradient beam 7. In addition, the first support pin 30A is inserted into the through hole of the first gradient beam 7 and the first through hole 30 of the first connection portion 29, so that the movement of the first gradient beam 7 in the vertical direction relative to the first fitting 21 is restricted.

The first fitting 21 further includes a second connection portion 31. The second connection portion 31 is formed on the second connection surface 26. The second connection portion 31 is inserted into a through hole 5B formed in the upper surface 5A of the first frame member 5. The second connection portion 31 includes a first shaft portion 31A. By inserting the first shaft portion 31A into the through hole 5B, horizontal movement of the first fitting 21 relative to the first frame member 5 is restricted. The second connection portion 31 may be removably attached to the second portion 27B by a bolt. The second connection portion 31 may be formed integrally with the second portion 27B.

The second connection portion 31 includes a second through hole 32. The second through hole 32 is formed in the first shaft portion 31A. The second through hole 32 is configured so that the second support pin 32A can be inserted when the second connection portion 31 is inserted into the insertion hole 5B of the first frame member 5. The second support pin 32A is, for example, a drift pin. When the second connection portion 31 is inserted into the insertion hole 5B of the first frame member 5, the second support pin 32A is inserted into the through hole of the first frame member 5 and the second through hole 32 of the second connection portion 31, so that the second connection portion 31 is firmly attached to the first frame member 5. The second support pin 32A penetrates the through hole formed in the first frame member 5 and the second through hole 32 of the second connection portion 31, so that the vertical movement of the first metal fitting 21 relative to the first frame member 5 is restricted.

The function of the first metal fitting 21 of this embodiment will be described.
The first metal fitting 21 is disposed on the upper surface 5A of the first frame member 5 and is connected to the first end surface 9 of the first gradient beam 7, thereby connecting the first gradient beam 7 and the first frame member 5. The first connection surface 25 extends upward from the second connection surface 26. Therefore, when the first metal fitting 21 connects the first gradient beam 7 and the first frame member 5, the first connection surface 25 is disposed so as to extend upward from the upper surface 5A of the first frame member 5. Therefore, by attaching the first end surface 9 of the first gradient beam 7 to the first connection surface 25, the first gradient beam 7 is offset upward with respect to the first frame member 5.

As shown in FIG. 6, the first fitting 21 can connect the first gradient beam 7 to the first frame member 5 so that the first gradient beam 7 does not overlap the first frame member 5 in the vertical direction. Without the first fitting 21, in order to offset the first gradient beam 7 upwardly to the first frame member 5, it is necessary to extend the first gradient beam 7 in the longitudinal direction so that the first gradient beam 7 overlaps the first frame member 5 in the vertical direction. In contrast, with the first fitting 21, the first gradient beam 7 can be offset upwardly to the first frame member 5 by the first fitting 21, so there is no need to extend the first gradient beam 7. In short, the first fitting 21 allows the first connection structure 22 to be constructed using the gradient beam 62 of the conventional roof 60 as is.

<Second metal fitting>
5 to 8, the second metal fitting 23 for realizing the second connection structure 24 will be described. The second metal fitting 23 connects the first gradient beam 7 and the second frame member 6 such that at least a portion of the second end face 10 is located above the upper surface 6A of the second frame member 6.

As shown in FIG. 8, the second fitting 23 includes a third connection surface 33 and a fourth connection surface 34. The third connection surface 33 is configured to contact the second end surface 10 at the upper end of the first gradient beam 7. The fourth connection surface 34 is configured to contact the upper surface 6A of the second frame member 6. The fourth connection surface 34 intersects perpendicularly with the third connection surface 33. The fourth connection surface 34 intersects perpendicularly with the third connection surface 33 at the lower end of the third connection surface 33. The third connection surface 33 and the fourth connection surface 34 are formed continuously.

As shown in FIG. 5, the second metal fitting 23 includes a second body portion 35. The second body portion 35 is made of iron, stainless steel, or the like. The second body portion 35 includes a third portion 35A where the third connection surface 33 is formed, and a fourth portion 35B where the fourth connection surface 34 is formed. The third portion 35A is a plate-shaped member. The fourth portion 35B is a plate-shaped member. The third portion 35A and the fourth portion 35B may be formed by bending a single plate-shaped member, or may be formed by joining two plate-shaped members by welding.

8, the second metal fitting 23 includes a third support portion 36A and a fourth support portion 36B. The third support portion 36A and the fourth support portion 36B support the third portion 35A so that the third portion 35A is disposed perpendicular to the fourth portion 35B. The third support portion 36A and the fourth support portion 36B are disposed so as to be aligned in the third direction D3. The third direction D3 is a direction parallel to the third connection surface 33 and the fourth connection surface 34. When the second metal fitting 23 connects the first gradient beam 7 and the second frame member 6, the third direction D3 coincides with the first direction D1. The third support portion 36A and the fourth support portion 36B are made of iron, stainless steel, or the like, and are joined to the second body portion 35 by welding or the like.

5 and 6, the second fitting 23 further includes a third connection portion 37. The third connection portion 37 is formed on the third connection surface 33. The third connection portion 37 is inserted into a slit 10A formed on the second end surface 10 at the upper end of the first gradient beam 7. By inserting the third connection portion 37 into the slit 10A, the movement of the first gradient beam 7 in the first direction D1 relative to the second fitting 23 is restricted. The third connection portion 37 is removably attached to the third portion 35A by a bolt and a nut. Since the third connection portion 37 is detachable from the third portion 35A, the size and shape of the third connection portion 37 can be selected according to the dimensions of the first gradient beam 7. The third connection portion 37 may be formed integrally with the third portion 35A.

The third connection portion 37 includes a third connection portion 37A and a fourth connection portion 37B. The third connection portion 37A and the fourth connection portion 37B are formed of plate-like members whose thickness direction coincides with the third direction D3 when the first gradient beam 7 and the second frame member 6 are connected. The third connection portion 37A and the fourth connection portion 37B are arranged so as to be aligned with a gap in the third direction D3. The third connection portion 37A and the fourth connection portion 37B are formed so as to extend obliquely downward along the first gradient beam 7 from the third connection surface 33 when the first gradient beam 7 and the second frame member 6 are connected. The third connection portion 37 may include other members in addition to or instead of the third connection portion 37A and the fourth connection portion 37B, as long as the third connection portion 37 can restrict the movement of the first gradient beam 7 in a direction parallel to the second frame member 6 relative to the second fitting 23. An example of the other members is an axis member.

The third connection portion 37 includes a third through hole 38. The third through hole 38 is formed in the third connection portion 37A and the fourth connection portion 37B. The third through hole 38 is configured so that the third support pin 38A is inserted when the third connection portion 37 is inserted into the slit 10A at the upper end of the first gradient beam 7. The third support pin 38A is, for example, a drift pin. When the third connection portion 37 is inserted into the slit 10A, the third support pin 38A is inserted into the third through hole 38, so that the third connection portion 37 is firmly attached to the first gradient beam 7. In addition, the third support pin 38A is inserted into the through hole of the first gradient beam 7 and the third through hole 38 of the third connection portion 37, so that the movement of the first gradient beam 7 in the vertical direction relative to the second metal fitting 23 is restricted.

The second fitting 23 further includes a fourth connection portion 39. The fourth connection portion 39 is formed on the fourth connection surface 34. The fourth connection portion 39 is inserted into a through hole 6B formed in the upper surface 6A of the second frame member 6. The fourth connection portion 39 includes a second shaft portion 39A. The second shaft portion 39A is inserted into the through hole 6B, thereby restricting movement of the second fitting 23 in a horizontal direction relative to the second frame member 6. The fourth connection portion 39 may be removably attached to the fourth portion 35B by a bolt. The fourth connection portion 39 may be formed integrally with the fourth portion 35B.

The fourth connection portion 39 includes a fourth through hole 40. The fourth through hole 40 is formed in the second shaft portion 39A. The fourth through hole 40 is configured so that the fourth support pin 40A can be inserted when the fourth connection portion 39 is inserted into the insertion hole 6B of the second frame member 6. The fourth support pin 40A is, for example, a drift pin. When the fourth connection portion 39 is inserted into the insertion hole 6B of the second frame member 6, the fourth support pin 40A penetrates the through hole of the second frame member 6 and the fourth through hole 40 of the fourth connection portion 39, so that the fourth connection portion 39 is firmly attached to the second frame member 6. The fourth support pin 40A penetrates the through hole formed in the second frame member 6 and the fourth through hole 40 of the fourth connection portion 39, so that the movement of the second metal fitting 23 in the vertical direction relative to the second frame member 6 is restricted.

As shown in Figures 7 and 8, the second connection portion 31 includes a plurality of second through holes 32. The fourth connection portion 39 includes a plurality of fourth through holes 40. The pitch of the plurality of fourth through holes 40 is equal to the pitch of the plurality of second through holes 32.

The function of the second metal fitting 23 of this embodiment will be described.
The second metal fitting 23 is disposed on the upper surface 6A of the second frame member 6 and is connected to the second end surface 10 of the first gradient beam 7, thereby connecting the first gradient beam 7 and the second frame member 6. The third connection surface 33 extends upward from the fourth connection surface 34. Therefore, when the second metal fitting 23 connects the first gradient beam 7 and the second frame member 6, the third connection surface 33 is disposed so as to extend upward from the upper surface 6A of the second frame member 6. Therefore, by attaching the second end surface 10 of the first gradient beam 7 to the third connection surface 33, the first gradient beam 7 is offset upward with respect to the second frame member 6.

As shown in FIG. 6, the second metal fitting 23 can connect the first gradient beam 7 to the second frame member 6 so that the first gradient beam 7 does not overlap the second frame member 6 in the vertical direction. Without the second metal fitting 23, in order to offset the first gradient beam 7 upwardly to the second frame member 6, it is necessary to extend the first gradient beam 7 in the longitudinal direction so that the first gradient beam 7 overlaps the second frame member 6 in the vertical direction. In contrast, with the second metal fitting 23, the first gradient beam 7 can be offset upwardly to the second frame member 6 by the second metal fitting 23, so there is no need to extend the first gradient beam 7. In short, the second metal fitting 23 allows the second connection structure 24 to be constructed using the gradient beam 62 of the conventional roof 60 as is.

The effects of this embodiment will be described.
(1-1) The connection structure 20 includes a first connection structure 22 that connects the lower end of the first gradient beam 7 and the first frame member 5. The first connection structure 22 includes a first metal fitting 21 that contacts a first end face 9 of the lower end of the first gradient beam 7. The first connection structure 22 includes a structure in which the first metal fitting 21 connects the first gradient beam 7 and the first frame member 5 such that the lower surface 7B of the first gradient beam 7 is located above the upper surface 5A of the first frame member 5.

With this configuration, the underside 7B of the first gradient beam 7 is located above the upper side 5A of the first frame member 5, so the first gradient beam 7 can be positioned higher than the gradient beam 62 of a conventional connection structure. Because the position of the first gradient beam 7 is higher, the first gradient beam 7 overlaps the rafter 8 when viewed from the first direction D1. As a result, the step between the underside 7B of the first gradient beam 7 and the underside 8D of the rafter 8 is smaller than the step between the underside of the gradient beam 62 of the conventional roof 60 and the underside of the rafter 64. This allows the thickness of the roof 1 to be made thinner, making the roof 1 slimmer. This improves the design of the ceiling compared to the conventional roof 60.

(1-2) The first fitting 21 includes a first connection surface 25 that contacts the first end surface 9 of the first gradient beam 7, and a second connection surface 26 that contacts the upper surface 5A of the first frame member 5 and perpendicularly intersects with the first connection surface 25. With this configuration, the first fitting 21 contacts the first gradient beam 7 and the first frame member 5, so that the first gradient beam 7 and the first frame member 5 can be reliably connected by the first fitting 21.

(1-3) A first connection portion 29 is formed on the first connection surface 25 to be inserted into a slit 9A formed in the first end surface 9 of the first gradient beam 7. With this configuration, the first connection portion 29 is inserted into the slit 9A to restrict movement of the first gradient beam 7 relative to the first fitting 21, so that the first gradient beam 7 and the first frame member 5 can be connected in an accurate positional relationship.

(1-4) The second connection surface 26 is formed with a second connection portion 31 that is inserted into a through hole 5B formed in the upper surface 5A of the first frame member 5. With this configuration, the second connection portion 31 is inserted into the through hole 5B to restrict movement of the first metal fitting 21 relative to the first frame member 5, so that the first gradient beam 7 and the first frame member 5 can be connected in an accurate positional relationship.

(1-5) The connection structure 20 further includes a second connection structure 24 that connects the upper end of the first gradient beam 7 and the second frame member 6. The second connection structure 24 includes a second metal fitting 23 that contacts the second end face 10 of the upper end of the first gradient beam 7. The second metal fitting 23 connects the first gradient beam 7 and the second frame member 6 such that at least a portion of the second end face 10 is located above the upper surface 6A of the second frame member 6 that is arranged parallel to the first frame member 5.

According to this configuration, the first connection structure 22 and the second connection structure 24 allow the first gradient beam 7 to be positioned higher from its upper end to its lower end than the gradient beam 62 of a conventional connection structure, thereby slimming down the structure of the roof 1.

(1-6) A roof 1 of a building 2, comprising a connection structure 20. With this configuration, the first gradient beam 7 is positioned higher than the gradient beam 62 of a conventional connection structure, thereby slimming down the structure of the roof 1. In addition, the ceiling member 13 can be positioned higher than in a conventional roof 60, thereby improving the design of the ceiling compared to the conventional roof 60.

(1-7) A roof 1 of a building 2, comprising a first frame member 5, a second frame member 6 arranged parallel to the first frame member 5, a first gradient beam 7 connected to the first frame member 5 and the second frame member 6, and a rafter 8 arranged parallel to the first gradient beam 7. The first gradient beam 7 is connected to the first frame member 5 and the second frame member 6 such that the upper surface 7A of the first gradient beam 7 is located above the lower surface 8D of the rafter 8.

According to this configuration, the first gradient beam 7 is positioned so that the upper surface 7A of the first gradient beam 7 is located above the lower surface 8D of the rafter 8, so that when the first gradient beam 7 and the rafter 8 are viewed from the first direction D1 along the first frame member 5, at least a portion of the rafter 8 overlaps with the first gradient beam 7. Therefore, the thickness of the roof 1 due to the first gradient beam 7 and the rafter 8 can be reduced. This allows the configuration of the roof 1 to be slimmed down.

(1-8) The first gradient beam 7 is connected to the first frame member 5 and the second frame member 6 so that the upper surface 7A of the first gradient beam 7 is located at the same height as the upper surface 8C of the rafter 8. With this configuration, when the vertical dimension L1 of the first gradient beam 7 is greater than the vertical dimension L2 of the rafter 8, the entire vertical dimension of the rafter 8 overlaps with the first gradient beam 7 when viewed from the first direction D1 along the first frame member 5. Therefore, the thickness of the roof 1, which is determined by the dimensions of the first gradient beam 7 and the rafter 8, can be made thinner. This allows the configuration of the roof 1 to be slimmer.

In addition, with this configuration, the sheathing boards 12 can be attached to the first gradient beams 7 and the rafters 8. By attaching the sheathing boards 12 to the first gradient beams 7, the rigidity of the roof 1 is improved. By improving the rigidity of the roof 1, the amount of structure for improving the rigidity of the building 2 can be reduced compared to the conventional building 61, and the degree of freedom in the structure of the building 2 is increased. Examples of structures for improving the rigidity of the building 2 include load-bearing walls, firestops, etc.

Second Embodiment
The roof 1 of the building 2 according to the second embodiment will be described with reference to Fig. 9. The same reference numerals as in the first embodiment are used for the components of the roof 1 of the building 2 of the second embodiment that are common to the first embodiment, and duplicated descriptions will be omitted.

<Roof>
The roof 1 further includes a second gradient beam 50 arranged parallel to the first gradient beam 7. The second gradient beam 50 is made of, for example, wood. The dimensions of the second gradient beam 50 are equal to those of the first gradient beam 7. The dimensions of the second gradient beam 50 may be different from those of the first gradient beam 7. The second gradient beam 50 is arranged such that the upper surface 50A of the second gradient beam 50 is located below the upper surface 7A of the first gradient beam 7. The second gradient beam 50 is connected to the first frame member 5 and the second frame member 6 such that the upper portion of the second gradient beam 50 overlaps the first gradient beam 7 when viewed from the first direction D1.

The second gradient beam 50 is connected to the first frame member 5 so that the end face of the lower end of the second gradient beam 50 contacts the side of the first frame member 5. The second gradient beam 50 is connected to the second frame member 6 so that the end face of the upper end of the second gradient beam 50 contacts the side of the second frame member 6. The second gradient beam 50 is connected to the first frame member 5 and the second frame member 6 so that the upper surface 50A of the second gradient beam 50 is located below the upper surface 8C of the rafter 8. The second gradient beam 50 is positioned so that the upper surface 50A of the second gradient beam 50 coincides with the second reference line R2 when viewed from the first direction D1.

The roof 1 includes a second connecting beam 51 and an additional rafter 52. The second connecting beam 51 and the additional rafter 52 are made of, for example, wood. The first end of the second connecting beam 51 is connected to the side of the second gradient beam 50 so that the upper surface of the second connecting beam 51 is flush with the upper surface 50A of the second gradient beam 50. The second end of the second connecting beam 51 is connected to a gradient beam arranged below the first gradient beam 7 so that the upper surface of the second connecting beam 51 is located below the upper surface 7A of the first gradient beam 7. The gradient beam arranged below the first gradient beam 7 is, for example, a gradient beam of a conventional connection structure. The additional rafter 52 is arranged between the first gradient beam 7 and the second gradient beam 50 in the first direction D1 when viewing the roof 1 from above. The additional rafter 52 is arranged so that the upper surface of the additional rafter 52 is flush with the upper surface 8C of the rafter 8. The additional rafter 52 is attached to the first frame member 5, the second frame member 6, and the second connecting beam 51 with screws or the like.

The roof 1 further includes a gable member 53 arranged to intersect with the second gradient beam 50. The gable member 53 is supported by the second gradient beam 50. The gable member 53 is arranged on the second gradient beam 50. The gable member 53 is made of, for example, wood. The gable member 53 constitutes the gable 54 of the building 2. The gable member 53 includes, for example, a corbel beam 53A whose one end is connected to the additional rafter 52. The gable member 53 is connected to the additional rafter 52 so that the lower surface of the gable member 53 is located at the same height as the lower surface 7B of the first gradient beam 7. The gable member 53 is connected to the additional rafter 52 so that the upper surface of the gable member 53 is flush with the upper surface of the additional rafter 52.

The function of the roof 1 of this embodiment will be described.
The building 2 of this embodiment further includes a second gradient beam 50 in addition to the first gradient beam 7. Since the gable member 53 can be supported by the second gradient beam 50, the gable 54 can be configured to be large. The second gradient beam 50 allows the building 2 to have a slim ceiling provided by the first gradient beam 7 and a large gable 54 provided by the second gradient beam 50.

The effects of this embodiment will be described.
(2-1) Further provided is a second gradient beam 50 arranged parallel to the first gradient beam 7. The second gradient beam 50 is connected to the first frame member 5 and the second frame member 6 such that the upper surface 50A of the second gradient beam 50 is located lower than the upper surface 8C of the rafter 8.

According to this configuration, the roof 1 includes the second gradient beam 50 that is arranged differently from the first gradient beam 7, so that it is possible to provide some parts that can be slimmed down and some parts that cannot be slimmed down. In addition, because the roof 1 includes the second gradient beam 50 that is arranged differently from the first gradient beam 7, the degree of freedom of the configuration of the roof 1 is improved. For example, in a conventional roof 60, the first gradient beam 7 can be added in place of or in addition to the gradient beam 62. In this case, since the second gradient beam 50 is not arranged in the part of the first gradient beam 7, the configuration of the roof 1 can be slimmed down. In addition, by attaching the sheathing board 12 to the first gradient beam 7, the rigidity can be improved compared to the conventional roof 60.

(2-2) Further provided is a gable member 53 that intersects with the second gradient beam 50. The gable member 53 is supported by the second gradient beam 50. With this configuration, the gable member 53 can be supported by the second gradient beam 50, so the gable 54 can be made large. In addition, because the gable 54 can be made large, the design of the roof 1 can be improved.

<Modification>
The above-described embodiments are examples of possible forms of the connection structure 20 and the roof 1 of the building 2, and are not intended to limit the forms. The connection structure 20 and the roof 1 of the building 2 may take forms different from those exemplified in the above-described embodiments. Examples of such forms include forms in which part of the configuration of each embodiment is replaced, modified, or omitted, or forms in which a new configuration is added to each embodiment. Modified examples of each embodiment are shown below.

(1) The roof 1 having the connection structure 20 does not have to be a roof placed above the pilotis 3. The roof 1 having the connection structure 20 may be, for example, a roof placed above the interior of the building 2.

(2) The pillar may be the first frame member 5. The pillar may include the third pillar 4C or the fourth pillar 4D. In short, the first connection structure 22 may have a structure in which the first metal fitting 21 connects the first gradient beam 7 and the pillar such that the lower surface 7B of the first gradient beam 7 is located above the upper surface of the pillar.

(3) The first gradient beam 7 may be connected to the first frame member 5 and the second frame member 6 so that the upper surface 7A of the first gradient beam 7 is located lower than the upper surface 8C of the rafter 8. Even in this case, if the upper surface 7A of the first gradient beam 7 is located higher than the lower surface 8D of the rafter 8, the lower surface 7B of the first gradient beam 7 is positioned higher, so that the structure of the roof 1 can be slimmer than that of the conventional roof 60.

(4) The first gradient beam 7 may be positioned so that the lower surface 7B of the first gradient beam 7 is at the same height as the lower surface 8D of the rafter 8. Even in this case, the lower surface 7B of the first gradient beam 7 is positioned at a higher position, so the structure of the roof 1 can be made slimmer than that of the conventional roof 60.

(5) The shape of the first metal fitting 21 is not limited as long as it has the first connection surface 25 and the second connection surface 26. The first metal fitting 21 may be formed, for example, as a cube, rectangular parallelepiped, or the like having the first connection surface 25 and the second connection surface 26.

(6) The shape of the second metal fitting 23 is not limited as long as it has the third connection surface 33 and the fourth connection surface 34. The second metal fitting 23 may be formed, for example, as a cube, rectangular parallelepiped, or the like, having the third connection surface 33 and the fourth connection surface 34.

(7) The first gradient beam 7 and the second frame member 6 may be connected by the second connection structure 24 so that the first gradient beam 7 overlaps the second frame member 6 in a plan view. In this case, the first gradient beam 7 may be connected by the second connection structure 24 to the second frame member 6 so that the lower surface 7B of the first gradient beam 7 is located above the upper surface 6A of the second frame member 6.

The present specification discloses the following techniques.
[Appendix 1]
A connection structure including a first connection structure connecting a lower end of a first gradient beam and a first frame member, the first connection structure comprising a first metal fitting contacting a first end face of the lower end of the first gradient beam, the first metal fitting connecting the first gradient beam and the first frame member such that the lower surface of the first gradient beam is positioned above the upper surface of the first frame member.

[Appendix 2]
2. The connection structure described in Appendix 1, wherein the first fitting includes a first connection surface that contacts the first end surface, and a second connection surface that contacts an upper surface of the first frame member and intersects with the first connection surface perpendicularly.

[Appendix 3]
3. The connection structure according to claim 2, wherein the first connection surface is formed with a first connection portion to be inserted into a slit formed in the first end surface.

[Appendix 4]
4. The connection structure according to claim 2 or 3, wherein a second connection portion is formed on the second connection surface to be inserted into an insertion hole formed in the upper surface of the first frame member.

[Appendix 5]
A connection structure as described in any one of Appendix 1 to 4, further comprising a second connection structure connecting an upper end of the first gradient beam and a second frame member arranged parallel to the first frame member, the second connection structure comprising a second metal fitting contacting a second end face of the upper end of the first gradient beam, the second end face being an end face opposite to the first end face, and the second connection structure comprising a structure in which the first gradient beam and the second frame member are connected by the second metal fitting so that at least a portion of the second end face is positioned above the upper surface of the second frame member.

[Appendix 6]
A roof of a building, comprising a connection structure according to any one of appendices 1 to 5.

[Appendix 7]
A roof of a building comprising: a first frame member; a second frame member arranged parallel to the first frame member; a first gradient beam connected to the first frame member and the second frame member; and a rafter arranged parallel to the first gradient beam, wherein the first gradient beam is connected to the first frame member and the second frame member such that an upper surface of the first gradient beam is located above a lower surface of the rafter.

[Appendix 8]
The roof of claim 7, wherein the first gradient beam is connected to the first frame member and the second frame member so that the upper surface of the first gradient beam is located at the same height as the upper surface of the rafter.

[Appendix 9]
9. The roof of claim 7 or 8, further comprising a second gradient beam arranged parallel to the first gradient beam, the second gradient beam being connected to the first frame member and the second frame member such that an upper surface of the second gradient beam is located below an upper surface of the rafters.

[Appendix 10]
The roof of claim 9, further comprising a gable member arranged to intersect with the second slope beam and supported by the second slope beam.

1...roof, 2...building, 5...first frame member, 6...second frame member, 7...first slope beam, 8...rafter, 9...first end face, 9A...slit, 10...second end face, 10A...slit, 20...connection structure, 21...first metal fitting, 22...first connection structure, 23...second metal fitting, 24...second connection structure, 25...first connection surface, 26...second connection surface, 29...first connection part, 31...second connection part, 50...second slope beam, 53...gable member.

Claims (10)

a first connection structure that connects a lower end of the first gradient beam and the first frame member;
The first connection structure includes a first metal fitting that contacts a first end surface of the lower end of the first gradient beam,
The first gradient beam and the first frame member are connected by the first metal fitting so that the lower surface of the first gradient beam is located above the upper surface of the first frame member ,
The first fitting is
a first connection surface in contact with the first end surface;
a second connection surface that contacts the upper surface of the first frame member and perpendicularly intersects with the first connection surface.
Connection structure. A first connection portion is formed on the first connection surface to be inserted into a slit formed in the first end surface.
The connection structure according to claim 1 . A second connection portion is formed on the second connection surface to be inserted into an insertion hole formed in the upper surface of the first frame member.
The connection structure according to claim 1 . Further comprising a second connection structure connecting an upper end of the first gradient beam and a second frame member arranged parallel to the first frame member;
The second connection structure includes a second metal fitting that contacts a second end surface of the upper end of the first gradient beam,
The second end surface is an end surface opposite to the first end surface,
The connection structure according to claim 1, wherein the second connection structure includes a structure in which the first gradient beam and the second frame member are connected by the second metal fitting so that at least a portion of the second end face is positioned above an upper surface of the second frame member. A roof of a building,
A roof comprising the connection structure according to any one of claims 1 to 4 . A roof of a building,
A first frame member; and
a second frame member disposed parallel to the first frame member;
a first gradient beam connected to the first frame member and the second frame member;
A rafter disposed parallel to the first gradient beam;
a connection structure that connects a lower end of the first gradient beam and the first frame member;
The connection structure includes the connection structure according to claim 1 ,
the first gradient beam is connected to the first frame member and the second frame member such that an upper surface of the first gradient beam is located above a lower surface of the rafters. The first gradient beam is connected to the first frame member and the second frame member such that the upper surface of the first gradient beam is located at the same height as the upper surface of the rafter.
7. The roof of claim 6 . Further comprising a second gradient beam arranged parallel to the first gradient beam;
The second gradient beam is
The second gradient beam is connected to the first frame member and the second frame member such that the upper surface of the second gradient beam is located below the upper surface of the rafter.
A roof according to claim 6 or 7 . The second slope beam is disposed so as to intersect with the second slope beam, and the second slope beam is supported by the gable member.
9. The roof of claim 8 . A roof of a building,
A first frame member; and
a second frame member disposed parallel to the first frame member;
a first gradient beam connected to the first frame member and the second frame member;
A rafter arranged parallel to the first gradient beam ;
A second gradient beam arranged parallel to the first gradient beam;
A gable member is disposed so as to intersect with the second gradient beam and is supported by the second gradient beam,
The first gradient beam is connected to the first frame member and the second frame member such that an upper surface of the first gradient beam is located above a lower surface of the rafter;
The second gradient beam is connected to the first frame member and the second frame member such that an upper surface of the second gradient beam is located below an upper surface of the rafter;
The gable member is arranged so that the upper surface of the gable member is flush with the upper surface of the rafter.
roof.

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