building

Abstract

To provide a building that can improve the degree of freedom in design. [Solution] The building comprises a skeleton. The skeleton comprises a reinforced beam (10) and a first column (20) supporting the reinforced beam (10). The reinforced beam (10) comprises a first beam (50) and a second beam (60) that is shorter than the first beam (50) and is connected to a first bottom surface (52) of the first beam (50). A first end surface (51) of the first beam (50) faces a first direction (A1) in which the reinforced beam (10) extends. A second end surface (61) of the second beam (60) facing the first direction (A1) is located away from the first end surface (51) of the first beam (50) in the direction opposite to the first direction (A1). The first column (20) is connected to the first bottom surface (52) of the first beam (50) so as to be located between the first end surface (51) and the second end surface (61) in the first direction (A1). A first column side surface (23) of the first column (20) facing the first direction (A1) is located away from the first end surface (51) of the first beam (50) in the direction opposite to the first direction (A1).

Description

[Technical Field]

[0001] The present disclosure relates to buildings. [Background technology]

[0002] There are known building structures in which columns are connected to the underside of beams. In the structure disclosed in Patent Document 1, through beams are used in the building's framework. The use of through beams increases the degree of freedom in the building's floor plan. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-192676 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, a beam constructed by combining a first beam with a second beam that is shorter than the first beam is known. The second beam is connected to the underside of the first beam. The end of the second beam is located near the end of the first beam. In this type of beam, the end of the first beam is supported by a column. By installing such a beam between the first and second floors, a large space can be created under the beam on the first floor of a building.

[0005] However, in the above beam, the second beam is connected to the underside of the first beam, which limits the position of the column supporting the beam, and this limitation on the column position may limit the design of the building. [Means for solving the problem]

[0006] (1) A building that solves the above problem is a building that includes a skeleton, the skeleton including a reinforced beam having a first beam and a second beam that is shorter than the first beam and is connected to a first underside of the first beam, and a first column that supports the reinforced beam, wherein a first end face of the first beam faces a first direction in which the reinforced beam extends, a second end face of the second beam faces the first direction and is located away from the first end face of the first beam in a direction opposite to the first direction, the first column is connected to the first underside of the first beam so as to be located between the first end face and the second end face in the first direction, and a first column side face of the first column faces the first direction and is located away from the first end face of the first beam in a direction opposite to the first direction.

[0007] According to this configuration, the first column is connected to the first underside of the first beam so that the first column side surface of the first column is offset from the first end surface of the first beam in the direction opposite to the first direction. Therefore, it is possible to install bearing walls, fixtures, and other facilities between the first end surface of the first beam and the first column side surface of the first column under the reinforced beam. In addition, it is possible to make the first beam protrude from the exterior wall of the building. This makes it possible to construct a protruding structure such as a veranda with the first beam as its framework. In this way, the degree of freedom in the design of the building can be improved.

[0008] (2) In the building of (1) above, in the first direction, a first distance from the first end face of the first beam to the center line of the first column is greater than a second distance from the second end face of the second beam to the center line of the first column.

[0009] With this configuration, because the first distance is greater than the second distance, it is possible to place large equipment between the first end face of the first beam and the first column side face of the first column under the reinforced beam, compared to when the first distance is equal to or less than the second distance. Also, when the first beam protrudes from the exterior wall of the building, the protruding distance of a protruding structure such as a veranda that uses the first beam as a framework can be increased.

[0010] (3) In the building of (1) or (2) above, the first beam has a first flange, a second flange, and a first web connecting the first flange and the second flange, the second beam has a third flange and a second web connecting the second flange of the first beam and the third flange, and the second web is welded to the second flange so as to overlap the first web in a planar view.

[0011] According to this configuration, since the first beam is an H-shaped steel and the second beam is a T-shaped steel, the weight of the reinforced beam can be reduced compared to when the reinforced beam is made of two H-shaped steels.

[0012] (4) In any one of the buildings (1) to (3) above, the main body further includes a bearing wall extending in the first direction in a plan view and arranged below the reinforcing beam, and the bearing wall is arranged between the first end face of the first beam and the first column side face of the first column in the first direction.

[0013] With this configuration, the shear wall is positioned below the reinforced beam between the first end face of the first beam and the first column side face of the first column, so that the height of the shear wall can be aligned with the height of the first lower face of the first beam.

[0014] (5) In the building of (4) above, the reinforcing beam is arranged between the first and second floors of the building, the load-bearing wall has a first brace and a second brace that intersects with the first brace in a front view, the first brace is connected to a first underside of the first beam and the lower end of the first column, and the second brace is connected to an upper end of the first column and the foundation of the building.

[0015] In a conventional structure, when a first brace and a second brace are provided to a beam in which the end of the second beam is located near the end of the first beam, the height of the first brace differs from the height of the second brace. Specifically, the end of the first brace is connected to the end of the first beam, while the end of the second brace is connected to the underside of the second beam, resulting in a difference in the height of the first brace from the height of the second brace. This creates an imbalance between the strength of the shear wall in the direction along the first brace and the strength of the shear wall in the direction along the second brace, potentially reducing the effectiveness of the shear wall. In this regard, with the above-described structure, the first column is connected to the first underside of the first beam, thereby reducing the difference in height between the first brace and the second brace compared to when the first column is connected to the second underside of the second beam.

[0016] (6) The building of (4) or (5) above further comprises a first exterior wall, which extends in the first direction in a plan view and is positioned at a different position from the reinforcing beam in a second direction intersecting the first direction, and which has an opening provided in the first exterior wall.

[0017] According to this configuration, the building comprises a reinforcing beam extending in a first direction and a first column supporting the reinforcing beam. Furthermore, the building has a first exterior wall provided at a position different from the reinforcing beam, and a bearing wall provided below the reinforcing beam. By providing the bearing wall below the reinforcing beam, the overall strength of the building 1 is improved, making it possible to reduce the strength of other parts. In this configuration, by providing the bearing wall below the reinforcing beam, it is possible to enlarge the opening in the first exterior wall.

[0018] (7) In any one of the buildings (1) to (3) above, the building further comprises a second exterior wall and a protruding structure protruding from the second exterior wall into the outdoor space of the building, wherein the second exterior wall extends in a second direction intersecting the first direction in a plan view, the first column is provided within the second exterior wall, at least a portion of the reinforcing beam is arranged in the outdoor space, and the portion of the reinforcing beam arranged in the outdoor space supports the protruding structure.

[0019] With this configuration, the reinforcing beams can be used to create a large space inside the building, while the beams can support the protruding structure in the outdoor space. This allows for a reduction in the number of beams in the entire building compared to when separate beams are provided for creating a large space inside the building and for supporting the protruding structure in the outdoor space. [Effects of the Invention]

[0020] According to the building of the present disclosure, the degree of freedom in designing the building can be improved. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a schematic diagram of a building according to a first embodiment. FIG. [Figure 2] FIG. 2 is a schematic diagram of the building frame of the building shown in FIG. 1, viewed from above the reinforced beam. [Figure 3] FIG. 2 is a front view of the connection portion between the reinforcing beam and the first column of FIG. 1. [Figure 4] FIG. 2 is a plan view of the connection portion between the reinforcing beam and the first column of FIG. 1. [Figure 5] FIG. 2 is a cross-sectional view of the reinforced beam of FIG. 1. [Figure 6] FIG. 2 is a front view of the bearing wall of FIG. 1. [Figure 7] FIG. 10 is a schematic diagram of a building according to a second embodiment. [Figure 8] FIG. 8 is a schematic diagram of the building frame of the building in FIG. 7, viewed from above the reinforced beams. [Figure 9] FIG. 8 is a front view of the connection portion between the reinforcing beam and the first pillar in FIG. 7. [Figure 10] FIG. 8 is a plan view of the connection portion between the reinforcing beam and the first pillar in FIG. 7. DETAILED DESCRIPTION OF THE INVENTION

[0022] First Embodiment A building 1 according to a first embodiment will be described with reference to Figures 1 to 6. The building 1 is, for example, a detached house, an apartment building, a commercial facility, a public facility, etc. In this embodiment, the building 1 will be described as a detached house.

[0023] <Buildings> As shown in Fig. 1, the building 1 includes a skeleton 2. The skeleton 2 includes a reinforcing beam 10 and a first column 20 that supports the reinforcing beam 10. The reinforcing beam 10 extends in a first direction A1. In the example of Fig. 1, the reinforcing beam 10 is disposed between the first and second floors of the building 1.

[0024] The first column 20 is placed on the foundation 3 of the building 1. The first column 20 supports a portion of the reinforced beam 10 that is more inward than the end portion. By having the first column 20 support a portion of the reinforced beam 10 that is more inward than the end portion, the amount of deflection in the center of the reinforced beam 10 can be reduced compared to when the first column 20 supports the end portion of the reinforced beam 10.

[0025] A space S1 is formed in the building 1. The space S1 is, for example, the living / dining / kitchen area of ​​the building 1. The space S1 is, for example, a large space provided on the first floor of the building 1. No columns such as the first column 20 are provided in the space S1. In Figures 1 and 2, the space S1 is the area surrounded by a dashed line. In the example of Figure 1, the center of the reinforcing beam 10 is located above the space S1.

[0026] In this embodiment, the skeleton 2 further includes a support beam 30. The support beam 30 supports the end of the reinforcing beam 10. The support beam 30 is supported by a second column 31. The end of the reinforcing beam 10 may be supported by a column other than the support beam 30.

[0027] The building 1 includes an exterior wall 4. The support beams 30 and the second columns 31 are arranged, for example, inside the exterior wall 4. The exterior wall 4 separates the interior and exterior of the building 1.

[0028] The skeleton 2 further includes a bearing wall 40. The bearing wall 40 extends in a first direction A1 in a plan view. The bearing wall 40 is disposed below the reinforcing beam 10. In the first direction A1, the bearing wall 40 is located between the first column 20 and the second column 31.

[0029] As shown in FIG. 2, the skeleton 2 is provided with, for example, a plurality of reinforcing beams 10. The plurality of reinforcing beams 10 are spaced apart in a second direction A2 that intersects with the first direction A1 in a plan view. Connecting beams 10X extending in the second direction A2 are provided between the plurality of reinforcing beams 10. The connecting beams 10X are connected to the side surfaces of the reinforcing beams 10. The connecting beams 10X are made of, for example, H-shaped steel equivalent to the first beam 50 of the reinforcing beam 10.

[0030] The building 1 further includes a first exterior wall 5. The first exterior wall 5 is a part of the exterior wall 4. The first exterior wall 5 extends in a first direction A1 in a plan view. The first exterior wall 5 is disposed at a position different from the reinforcing beam 10 in the second direction A2. An opening 6 is provided in the first exterior wall 5.

[0031] The opening 6 is an opening that connects the inside and outside of the building 1. The opening 6 is, for example, a window. The opening 6 connects, for example, a space S1 among the indoor spaces to an outdoor space.

[0032] Two bearing wall structures 5Y are provided on the first exterior wall 5. The bearing wall structures 5Y are arranged below the beams 5X that support the first exterior wall 5. In FIG. 2, the portions where the bearing wall structures 5Y and the bearing walls 40 are provided are indicated by dotted hatching. The opening 6 is provided between the two bearing wall structures 5Y in the first direction A1. The bearing wall structures 5Y have the same structure as the bearing walls 40, for example. In terms of structural calculations of the building 1, it is preferable that the height of the bearing wall structures 5Y be approximately equal to the height of the bearing walls 40.

[0033] <Reinforced beam> As shown in FIG. 1 , the reinforced beam 10 has a first beam 50 and a second beam 60. The second beam 60 is shorter than the first beam 50. The second beam 60 is connected to a first lower surface 52 of the first beam 50. The second beam 60 is located, for example, above a space S1. By using the reinforced beam 10 in which the second beam 60 is connected to the first lower surface 52 of the first beam 50, a large space can be formed below the second beam 60 in the building 1. In the example of FIG. 1 , the space S1 can be formed as a large space by using the reinforced beam 10.

[0034] As shown in FIGS. 3 and 4 , a first end surface 51 of the first beam 50 faces the first direction A1. A support beam 30 is connected to the first end surface 51. The support beam 30 is, for example, an H-shaped steel. The first end surface 51 of the first beam 50 is fixed to the support beam 30 by, for example, a fixing bracket 32. The fixing bracket 32 ​​is fixed to the web of the support beam 30 by a fixing member such as a bolt, with the first web 55 of the first beam 50 sandwiched between the first end surface 51 of the first beam 50.

[0035] The second end surface 61 of the second beam 60 faces the first direction A1. The second end surface 61 of the second beam 60 is located away from the first end surface 51 of the first beam 50 in the direction opposite to the first direction A1. A ceiling 1X of the first floor of the building 1 is provided below the second lower surface 62 of the second beam 60. The ceiling 1X is composed of ceiling members such as ceiling panels that are placed below the reinforcing beams 10. The ceiling 1X is located above the space S1.

[0036] An arrangement surface 11 is provided on a portion of the first lower surface 52 of the first beam 50 that is located between the first end surface 51 of the first beam 50 and the second end surface 61 of the second beam 60 in the first direction A1. The upper end portion 21 of the first column 20 is attached to the arrangement surface 11.

[0037] A first inner wall 7 extending in the second direction A2 and a second inner wall 8 extending in the first direction A1 are arranged below the placement surface 11 of the first beam 50. The first inner wall 7 is arranged, for example, below the multiple placement surfaces 11 of multiple reinforcing beams 10 lined up in the second direction A2. A first column 20 is arranged inside the first inner wall 7. The second inner wall 8 is provided between the first inner wall 7 and the outer wall 4. The first inner wall 7 and the second inner wall 8 divide the indoor space of the building 1.

[0038] An interior such as a curtain box may be placed in the space below the placement surface 11. Such an interior may be placed, for example, between the second end surface 61 of the second beam 60 and the first inner wall 7. Between the second end surface 61 of the second beam 60 and the first inner wall 7, the height of the ceiling 1X is set to match the height of the first lower surface 52 of the first beam 50.

[0039] As shown in FIG. 5 , the first beam 50 has a first flange 53, a second flange 54, and a first web 55. The first web 55 connects the first flange 53 and the second flange 54. The second beam 60 has a third flange 63 and a second web 64. The second web 64 connects the second flange 54 of the first beam 50 to the third flange 63. In one example, the first beam 50 is an H-shaped steel, and the second beam 60 is a T-shaped steel. The second beam 60 is connected to the first beam 50 by welding. The second web 64 is welded to the second flange 54 so as to overlap the first web 55 in a plan view.

[0040] The first height H1 of the first beam 50 is greater than the second height H2 of the second beam 60. The first height H1 is, for example, 200 mm. The second height H2 is, for example, 98 mm. The second height H2 is set according to the height of the ceiling 1X of the space S1 of the building 1. The second height H2 of the second beam 60 may be equal to the first height H1 of the first beam 50.

[0041] <Pillar 1> As shown in Fig. 3, the first column 20 is connected to the first lower surface 52 of the first beam 50 so as to be located between the first end surface 51 of the first beam 50 and the second end surface 61 of the second beam 60 in the first direction A1. The upper end portion 21 of the first column 20 is attached to the second flange 54 of the first beam 50 with a fixing member such as a bolt, thereby connecting the first column 20 to the first lower surface 52 of the first beam 50. The lower end portion 22 of the first column 20 is connected to the foundation 3, for example (see Fig. 6).

[0042] The first column side surface 23 of the first column 20 faces the first direction A1. The first column side surface 23 of the first column 20 is located away from the first end surface 51 of the first beam 50 in the direction opposite to the first direction A1. The second column side surface 24 of the first column 20 faces the direction opposite to the first direction A1. The second column side surface 24 of the first column 20 is the end surface of the first column 20 opposite to the first column side surface 23. The second column side surface 24 of the first column 20 is located away from the second end surface 61 of the second beam 60 in the first direction A1. The second column side surface 24 of the first column 20 faces the second end surface 61 of the second beam 60.

[0043] The length of the first beam 50 in the first direction A1 is, for example, 6000 mm or more and 8000 mm or less. The length of the first beam 50 in the first direction A1 is, for example, 8000 mm. The length of the second beam 60 in the first direction A1 is, for example, 5000 mm or more and 7000 mm or less. The length of the second beam 60 in the first direction A1 is, for example, 5360 mm. The distance L from the first end surface 51 of the first beam 50 to the second end surface 61 of the second beam 60 is, for example, 1000 mm or more and 2000 mm or less. The distance L is, for example, 1320 mm.

[0044] A first distance L1 from the first end face 51 of the first beam 50 to the center line CL of the first pillar 20 is greater than a second distance L2 from the second end face 61 of the second beam 60 to the center line CL of the first pillar 20. The center line CL passes through the center of the first pillar 20 in the first direction A1. The first distance L1 is, for example, 1000 mm. The second distance L2 is, for example, 320 mm.

[0045] <Load-bearing wall> 6, the bearing wall 40 is disposed between the first end face 51 of the first beam 50 and the first column side face 23 of the first column 20 in the first direction A1. In the vertical direction, the bearing wall 40 is disposed between the reinforced beam 10 and the foundation 3.

[0046] The load-bearing wall 40 has a first brace 41 and a second brace 42. The second brace 42 intersects with the first brace 41 in a front view. The first brace 41 and the second brace 42 are disposed inside the second inner wall 8. The first brace 41 and the second brace 42 are hidden by, for example, the surface material of the second inner wall 8.

[0047] The first brace 41 is connected to the first lower surface 52 of the first beam 50 and the lower end portion 22 of the first column 20. One end of the first brace 41 is attached to a first metal fitting 43 fixed to the first lower surface 52 of the first beam 50, for example. The other end of the first brace 41 is attached to a second metal fitting 44 fixed to the lower end portion 22 of the first column 20, for example.

[0048] The second brace 42 is connected to the upper end 21 of the first column 20 and the foundation 3 of the building 1. One end of the second brace 42 is attached to, for example, a third metal fitting 45 that is fixed to the upper end 21 of the first column 20. The other end of the second brace 42 is attached to, for example, a fourth metal fitting 46 that is fixed to the foundation 3 of the building 1.

[0049] 6 , the first metal fitting 43 that secures one end of the first brace 41 to the first lower surface 52 of the first beam 50 is positioned so as to generally overlap in the vertical direction with the first end surface 51 of the first beam 50. In addition, the fourth metal fitting 46 that secures the other end of the second brace 42 to the foundation 3 of the building 1 is also positioned so as to generally overlap in the vertical direction with the first end surface 51 of the first beam 50. The first metal fitting 43 and the fourth metal fitting 46 may be positioned at a distance from the first end surface 51 of the first beam 50 in the direction opposite to the first direction A1. This allows a fixture such as a door to be provided between the bearing wall 40 and the exterior wall 4 on the second interior wall 8.

[0050] <Operation of this embodiment> The first function of this embodiment will be described. In the building 1, a large space is formed below the second beam 60 by the reinforcing beam 10, and equipment such as a bearing wall 40 can be placed below the reinforcing beam 10 between the first column side surface 23 of the first column 20 and the first end surface 51 of the first beam 50. Because the first column side surface 23 of the first column 20 is placed away from the first end surface 51 of the first beam 50 in the direction opposite to the first direction A1, the height between the first column side surface 23 of the first column 20 and the first end surface 51 of the first beam 50 below the placement surface 11 is constant. This simplifies the structure of the equipment placed below the reinforcing beam 10.

[0051] A second function of this embodiment will be described. In the building 1, a bearing wall 40 is located below the placement surface 11. If the height of the first brace 41 in the bearing wall 40 differs significantly from the height of the second brace 42, the structural calculations for the building 1 become complicated. In this regard, in the building 1, the height of the space below the placement surface 11 where the bearing wall 40 is located is constant, so the height of the first brace 41 and the height of the second brace 42 can be roughly matched.

[0052] A third function of this embodiment will be described. In the building 1, an opening 6 is provided in a first exterior wall 5. The first exterior wall 5 extends in a first direction A1, which is the direction in which the reinforcing beams 10 extend. Because a bearing wall 40 is provided below the reinforcing beams 10, the number of structures such as bearing walls extending in the first direction A1 can be reduced compared to when the bearing wall 40 is not provided below the reinforcing beams 10.

[0053] <Effects of this embodiment> The effects of this embodiment will be described. (1-1) The building 1 comprises a skeleton 2. The skeleton 2 comprises a reinforcing beam 10 and a first column 20 supporting the reinforcing beam 10. The reinforcing beam 10 extends in a first direction A1. The reinforcing beam 10 has a first beam 50 and a second beam 60. The second beam 60 is shorter than the first beam 50. The second beam 60 is connected to a first lower surface 52 of the first beam 50. A first end surface 51 of the first beam 50 faces the first direction A1. A second end surface 61 of the second beam 60 faces the first direction A1. The second end surface 61 of the second beam 60 is located away from the first end surface 51 of the first beam 50 in a direction opposite to the first direction A1. The second direction A2 is the direction opposite to the first direction A1. The first pillar 20 is connected to the first lower surface 52 of the first beam 50 so as to be located between the first end surface 51 and the second end surface 61. The first pillar side surface 23 of the first pillar 20 faces the first direction A1. The first pillar side surface 23 of the first pillar 20 is located away from the first end surface 51 of the first pillar 20 in the direction opposite to the first direction A1.

[0054] According to this configuration, the first column 20 is connected to the first underside 52 of the first beam 50 so that the first column side surface 23 of the first column 20 is offset from the first end surface 51 of the first beam 50 in the direction opposite to the first direction A1. Therefore, it is possible to provide facilities such as a bearing wall or fittings between the first end surface 51 of the first beam 50 and the first column side surface 23 of the first column 20 below the reinforcing beam 10. In addition, it is possible to make the first beam 50 protrude from the exterior wall 4 of the building 1. This makes it possible to configure a protruding structure such as a veranda with the first beam 50 as a framework. In this way, the degree of freedom in the design of the building 1 can be improved.

[0055] (1-2) In the first direction A1, the first distance L1 from the first end face 51 of the first beam 50 to the center line CL of the first column 20 is greater than the second distance L2 from the second end face 61 of the second beam 60 to the center line CL of the first column 20.

[0056] According to this configuration, because the first distance L1 is greater than the second distance L2, it is possible to place large equipment between the first end face 51 of the first beam 50 and the first column side face 23 of the first column 20 under the reinforced beam 10, compared to when the first distance L1 is equal to or less than the second distance L2. Furthermore, when the first beam 50 is made to protrude from the exterior wall 4 of the building 1, the protruding distance of a protruding structure such as a veranda that uses the first beam 50 as a framework can be increased.

[0057] (1-3) The first beam 50 has a first flange 53, a second flange 54, and a first web 55. The first web 55 connects the first flange 53 and the second flange 54. The second beam 60 has a third flange 63 and a second web 64. The second web 64 connects the second flange 54 of the first beam 50 to the third flange 63. The second web 64 is welded to the second flange 54 so as to overlap the first web 55 in a plan view.

[0058] According to this configuration, since the first beam 50 is an H-shaped steel and the second beam 60 is a T-shaped steel, the reinforced beam 10 can be made lighter than when the reinforced beam 10 is made of two H-shaped steels.

[0059] (1-4) The skeleton 2 further includes a bearing wall 40. The bearing wall 40 extends in a first direction A1 in a plan view. The bearing wall 40 is disposed below the reinforced beam 10. The bearing wall 40 is disposed between the first end face 51 of the first beam 50 and the first column side face 23 of the first column 20 in the first direction A1.

[0060] According to this configuration, the load-bearing wall 40 is positioned below the reinforced beam 10 between the first end face 51 of the first beam 50 and the first column side face 23 of the first column 20, so that the height of the load-bearing wall 40 can be aligned with the height of the first lower face 52 of the first beam 50.

[0061] (1-5) The reinforcing beam 10 is arranged between the first and second floors of the building 1. The bearing wall 40 has a first brace 41 and a second brace 42. The second brace 42 intersects with the first brace 41 in a front view. The first brace 41 is connected to the first lower surface 52 of the first beam 50 and the lower end 22 of the column. The second brace 42 is connected to the upper end 21 of the first column 20 and the foundation 3 of the building 1.

[0062] In a conventional structure, when a first brace and a second brace are provided to a beam such that the end of the second beam is located near the end of the first beam, the height of the first brace differs from the height of the second brace. Specifically, the end of the first brace is connected to the end of the first beam, while the end of the second brace is connected to the underside of the second beam, resulting in a difference in the height of the first brace from the height of the second brace. This creates an imbalance between the strength of the shear wall along the first brace and the strength of the shear wall along the second brace, potentially reducing the effectiveness of the shear wall. In this regard, with the above-described structure, the first column 20 is connected to the first underside 52 of the first beam 50, thereby reducing the difference in height between the first brace 41 and the second brace 42 compared to when the first column 20 is connected to the second underside 62 of the second beam 60.

[0063] (1-6) The building 1 has a first exterior wall 5. The first exterior wall 5 extends in a first direction A1 in a plan view. The first exterior wall 5 is disposed at a position different from the reinforcing beam 10 in a second direction A2 that intersects with the first direction A1. An opening 6 is provided in the first exterior wall 5.

[0064] According to this configuration, the building 1 comprises a reinforcing beam 10 extending in the first direction A1 and a first column 20 supporting the reinforcing beam 10. Furthermore, the building 1 is provided with a first exterior wall 5 at a position different from the reinforcing beam 10 in the second direction A2, and a bearing wall 40 is provided below the reinforcing beam 10. In the building 1, providing the bearing wall 40 below the reinforcing beam 10 improves the overall strength of the building 1, making it possible to reduce the strength of other portions. In this configuration, providing the bearing wall 40 below the reinforcing beam 10 makes it possible to enlarge the opening 6 in the first exterior wall 5.

[0065] Second Embodiment A building 1 according to the second embodiment will be described with reference to Figures 7 to 10. Note that in this embodiment, components that are substantially unchanged from those in the first embodiment are given the same reference numerals as those in the first embodiment, and descriptions thereof will be omitted.

[0066] In this embodiment, at least a part of the reinforcing beam 10 is arranged in the outdoor space of the building 1. The part of the reinforcing beam 10 arranged in the outdoor space supports the protruding structural portion 70.

[0067] 7 and 8, the building 1 of this embodiment includes a second exterior wall 9 and a protruding structure 70. The second exterior wall 9 is part of the exterior wall 4 of the building 1. The second exterior wall 9 extends in a second direction A2.

[0068] An end of the first beam 50 of the reinforcing beam 10 is arranged in the outdoor space of the building 1. A second beam 60 of the reinforcing beam 10 is arranged in the indoor space of the building 1. In the example of FIG. 7, the second beam 60 is located above the space S1. In a plan view, the protruding structure 70 does not overlap with the second beam 60 of the reinforcing beam 10.

[0069] The protruding structure 70 protrudes from the second exterior wall 9 into the outdoor space of the building 1. In a plan view, the protruding structure 70 is disposed at a position away from the space S1. The protruding structure 70 is configured to be accessible from, for example, the second floor of the building 1. The protruding structure 70 is, for example, a balcony or a veranda. A portion of the first floor of the building 1 may be provided below the protruding structure 70.

[0070] 9 and 10, the reinforced beam 10 of this embodiment is configured similarly to the reinforced beam 10 of the first embodiment. The first pillar 20 of this embodiment is provided within the second outer wall 9. The protruding structure 70 is disposed away from the first pillar side surface 23 of the first pillar 20 in the first direction A1.

[0071] In the multiple reinforcing beams 10, the first end faces 51 of the multiple first beams 50 are connected by a connecting beam 30X. The connecting beam 30X extends in the second direction A2 (see FIG. 8). The connecting beam 30X is configured similarly to the support beam 30 of the first embodiment, except that it is not supported by the second pillar 31. The connecting beam 30X may be supported by a pillar similar to the second pillar 31.

[0072] The protruding structure 70 has a wall portion 71 and a floor portion 72. The wall portion 71 forms a handrail of the protruding structure 70. The wall portion 71 surrounds the floor portion 72 in a plan view. The wall portion 71 has a first wall portion 71A extending in a first direction A1 in a plan view and a second wall portion 71B extending in a second direction A2 in a plan view.

[0073] The floor portion 72 forms the floor of the protruding structure portion 70. For example, a person can stand on the floor of the protruding structure portion 70. The floor portion 72 has a floor surface portion 72A that forms the floor surface of the protruding structure portion 70, and a bracket 72B that supports the floor surface portion 72A. The bracket 72B is fixed to a portion of the reinforcing beam 10 that is placed in the outdoor space. Specifically, the bracket 72B is fixed to the first flange 53 of the first beam 50 by a fixing member such as a bolt.

[0074] <Operation of this embodiment> The operation of this embodiment will be described. In the building 1 of this embodiment, the portion of the reinforcing beam 10 that is placed in the outdoor space supports the protruding structure 70. By extending the reinforcing beam 10 that constitutes a large space into the outdoor space and supporting the protruding structure 70 with the extended portion, the structure of the skeleton 2 can be simplified.

[0075] <Effects of this embodiment> The effects of this embodiment will be described. (2) The building 1 further includes a second exterior wall 9 and a protruding structure 70. The protruding structure 70 protrudes from the second exterior wall 9 into the outdoor space of the building 1. The second exterior wall 9 extends in a second direction A2. The second direction A2 intersects with the first direction A1 in a plan view. The first column 20 is provided within the second exterior wall 9. At least a portion of the reinforcing beam 10 is arranged in the outdoor space. The portion of the reinforcing beam 10 that is arranged in the outdoor space supports the protruding structure 70.

[0076] According to this configuration, a large space can be formed indoors in the building 1 using the reinforcing beams 10, while in the outdoor space the protruding structural portion 70 can be supported by the reinforcing beams 10. Therefore, the number of beams in the entire building can be reduced compared to when separate beams are provided for forming a large space indoors and for supporting the protruding structural portion 70 in the outdoor space.

[0077] <Modification> The above-described embodiments are examples of possible forms of the building 1 and are not intended to limit the form. The building 1 may take forms different from those illustrated 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.

[0078] In the embodiment, one end of the reinforcing beam 10 has been described as an example, but the other end of the reinforcing beam 10 may also be configured in the same manner as the one end of the reinforcing beam 10.

[0079] The first distance L1 from the first end face 51 of the first beam 50 to the first pillar 20 may be equal to or smaller than the second distance L2 from the second end face 61 of the second beam 60 to the first pillar 20. As long as the first pillar side surface 23 of the first pillar 20 is positioned away from the first end face 51 of the first beam 50 in the direction opposite to the first direction A1, the position of the first pillar 20 on the arrangement surface 11 can be freely changed.

[0080] Although an H-shaped steel beam is used as an example of the first beam 50 and a T-shaped steel beam is used as an example of the second beam 60, the first beam 50 and the second beam 60 are not limited to these examples. For example, both the first beam 50 and the second beam 60 may be made of H-shaped steel. At least one of the first beam 50 and the second beam 60 may be made of wood, without being limited to steel.

[0081] In the first embodiment, in FIG. 2, the bearing wall 40 is arranged under only one reinforcing beam 10, but in the building 1, the bearing wall 40 may be arranged under two or more reinforcing beams 10.

[0082] In the first embodiment, the first brace 41 and the second brace 42 of the bearing wall 40 may be wooden braces.

[0083] In the first embodiment, a seismic damper may be provided under the placement surface 11 in addition to or instead of the bearing wall 40. In this modification, the load on the bearing wall 40 can be reduced by the seismic damper.

[0084] The present specification discloses the following techniques. [Appendix 1] A building comprising a skeleton, the skeleton comprising: a reinforcing beam having a first beam and a second beam that is shorter than the first beam and is connected to a first underside of the first beam; and a first column supporting the reinforcing beam, wherein a first end face of the first beam faces a first direction in which the reinforcing beam extends, a second end face of the second beam faces the first direction and is located away from the first end face of the first beam in a direction opposite to the first direction, the first column is connected to the first underside of the first beam so as to be located between the first end face and the second end face in the first direction, and a first column side face of the first column faces the first direction and is located away from the first end face of the first beam in a direction opposite to the first direction.

[0085] [Appendix 2] A building as described in Appendix 1, wherein in the first direction, a first distance from the first end face of the first beam to the center line of the first column is greater than a second distance from the second end face of the second beam to the center line of the first column.

[0086] [Appendix 3] The building described in Appendix 1, wherein the first beam has a first flange, a second flange, and a first web connecting the first flange and the second flange, the second beam has a third flange and a second web connecting the second flange of the first beam and the third flange, and the second web is welded to the second flange so as to overlap the first web in a plan view.

[0087] [Appendix 4] The building described in any one of Appendix 1 to 3, wherein the main body further includes a bearing wall extending in the first direction in a plan view and arranged below the reinforcing beam, the bearing wall being arranged between the first end face of the first beam and the first column side face of the first column in the first direction.

[0088] [Appendix 5] 5. The building described in Appendix 4, wherein the reinforcing beam is arranged between the first and second floors of the building, the load-bearing wall has a first brace and a second brace that intersects with the first brace in a front view, the first brace is connected to a first underside of the first beam and a lower end of the first column, and the second brace is connected to an upper end of the first column and a foundation of the building.

[0089] [Appendix 6] The building described in Appendix 4 further comprises a first exterior wall, the first exterior wall extending in the first direction in a plan view and positioned at a different position from the reinforcing beam in a second direction intersecting the first direction, and an opening provided in the first exterior wall.

[0090] [Appendix 7] 4. The building described in any one of Appendixes 1 to 3, further comprising a second exterior wall and a protruding structure protruding from the second exterior wall into an outdoor space of the building, wherein the second exterior wall extends in a second direction that intersects with the first direction in a plan view, the first column is provided within the second exterior wall, at least a portion of the reinforcing beam is arranged in the outdoor space, and the portion of the reinforcing beam that is arranged in the outdoor space supports the protruding structure. [Explanation of symbols]

[0091] 1...building, 2...body, 3...foundation, 5...first exterior wall, 6...opening, 9...second exterior wall, 10...reinforced beam, 20...first column, 21...upper end, 22...lower end, 23...side of first column, 40...load-bearing wall, 41...first brace, 42...second brace, 50...first beam, 51...first end face, 52...first bottom face, 53...first flange, 54...second flange, 55...first web, 60...second beam, 61...second end face, 63...third flange, 64...second web, 70...protruding structural part.

Claims

1. A building having a skeleton and a first exterior wall, The body is a plurality of reinforcing beams extending in a first direction, the reinforcing beams including a first beam and a second beam shorter than the first beam and connected to a first lower surface of the first beam; a first column supporting the reinforcing beam; a bearing wall extending in the first direction in a plan view and disposed below the reinforcing beam; the plurality of reinforcing beams are spaced apart from one another in a second direction intersecting the first direction; A space is provided under the second beam of the plurality of reinforcing beams, the first exterior wall has two bearing wall structures and an opening disposed between the two bearing wall structures to connect the space with an outdoor space, is configured to extend in the first direction in a plan view, and is disposed at a position different from the reinforcing beam in the second direction; a first end surface of the first beam facing the first direction in which the reinforcing beam extends; a second end surface of the second beam faces the first direction and is located away from the first end surface of the first beam in a direction opposite to the first direction; the first pillar is connected to the first lower surface of the first beam so as to be located between the first end surface and the second end surface in the first direction; a first pillar side surface of the first pillar facing the first direction and positioned away from the first end surface of the first beam in a direction opposite to the first direction; The bearing wall is disposed between the first end surface of the first beam and the first column side surface of the first column in the first direction. architecture.

2. In the first direction, a first distance from the first end surface of the first beam to a center line of the first pillar is greater than a second distance from the second end surface of the second beam to the center line of the first pillar. The building according to claim 1.

3. the first beam has a first flange, a second flange, and a first web connecting the first flange and the second flange; the second beam has a third flange and a second web connecting the second flange of the first beam and the third flange, The second web is welded to the second flange so as to overlap the first web in a plan view. The building according to claim 1.

4. The reinforcing beam is disposed between the first and second floors of the building; The bearing wall has a first brace and a second brace that intersects with the first brace in a front view, the first brace is connected to the first lower surface of the first beam and a lower end of the first column, The second brace is connected to the upper end of the first column and the foundation of the building. A building according to any one of claims 1 to 3.

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