Projected corner structure

Abstract

To provide a projected corner structure allowing good workability at an intersection where a lower surface of a projected part of an upper floor and outer surfaces of both sides of a projected corner of a lower floor intersect, and in the vicinity of the intersection.SOLUTION: A projected corner structure of a lower floor arranged under a projected part 202 of an upper floor is provided with: horizontal members 72, 73 connected with each other; steel beams 62, 63 arranged parallel to the horizontal members 72, 73; wooden columns 82R, 83L installed on the horizontal members 72, 73 and connected to the steel beams 62, 63; walls 112, 113 installed between the horizontal members 72, 73 and the steel beams 62, 63 and connected to the wooden columns 82R, 83L; bars 162, 163 fixed on the steel beams 62, 63 along the steel beams 62, 63 below the steel beams 62, 63 and connected with each other so as to form a corner; and exterior material 187 formed so as to form the corner and covering the wooden columns 82R, 83L. An upper part of the exterior material 187 is inserted into an inside of a corner formed with the bars 162, 163.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a corner structure.

Background Art

[0002] Patent Document 1 discloses a ramen structure composed of wooden columns and steel beams. The steel beam is made of H-shaped steel. A pair of pressure plates are provided on the lower flange of the steel beam facing each other, and the head of the wooden column under the steel beam is sandwiched between these pressure plates. A through bolt penetrates these pressure plates and the head, and a pair of nuts are fastened to both ends of the through bolt so as to sandwich these pressure plates and the head. The leg of the wooden column above the steel beam is similarly joined to the upper flange of the steel column. Adjacent wooden columns are similarly joined to the steel beam. Usually, a wall is provided in the area surrounded by the columns and the beam.

[0003] Patent Document 2 discloses a building in which a cantilever structure on the second floor projects to the outdoor side beyond the outer wall on the first floor, and a corner on the first floor is provided under the cantilever structure.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when the corner on the first floor is provided under the cantilever part on the second floor, the construction at the intersection where the lower surface of the cantilever part and the outer surfaces on both sides of the corner intersect and the vicinity thereof is very difficult from the viewpoints of durability, water resistance, weather resistance, etc. In particular, when the corner is not a right angle and exceeds 90°, the difficulty of construction increases significantly. Therefore, an object of the present invention is to provide a technique capable of realizing good workability at the intersection where the lower surface of the overhanging portion on the upper floor intersects the outer surfaces on both sides of the protruding corner on the lower floor and in the vicinity thereof.

Means for Solving the Problems

[0006] The reference numerals shown in the following parentheses are referred to in FIGS. 1 to 13.

[0007] In order to solve the above problems, according to the invention according to claim 1, there is provided a protruding corner structure on the lower floor provided under an overhanging portion (202) on the upper floor protruding from the outer periphery of the lower floor of a building (200), the protruding corner structure including: a pair of wooden horizontal members (72, 73) joined to each other so as to form a corner; a pair of steel beams (62, 63) provided parallel to the pair of horizontal members (72, 73) respectively above the pair of horizontal members (72, 73); a pair of wooden columns (82R, 83L) arranged in parallel with the corner therebetween, built on the pair of horizontal members (72, 73) respectively, and joined to the pair of steel beams (62, 63) respectively; a pair of walls (112, 113) built between the horizontal members (72, 73) and the steel beams (62, 63), joined to the pair of wooden columns (82R, 83L) respectively, and forming a protruding corner; a pair of wooden crosspieces (162, 163) fixed to the pair of steel beams (62, 63) respectively along the pair of steel beams (62, 63) under the pair of steel beams (62, 63) and joined to each other so as to form a corner; and an exterior material (187) formed so as to form a protruding corner and externally mounted on the pair of wooden columns (82R, 83L), wherein an upper portion of the exterior material (187) is inserted inside the corner formed by the pair of crosspieces (162, 163).

[0008] According to the invention according to claim 1 as described above, wooden columns (82R, 83L) are arranged in parallel, the wooden columns (82R, 83L) are respectively built into the horizontal members (72, 73), and the wooden columns (82R, 83L) are respectively joined to the steel beams (62, 63). One wall (112) is built between one horizontal member (72) and one steel beam (62), and the other wall (113) is built between the other horizontal member (73) and the other steel beam (63). These contribute to the ability to firmly construct the outside corner between the pair of walls (112, 113), and also contribute to the ability to easily construct the outside corner into an obtuse angle. The exterior material (187) is formed so as to form an outside corner. The exterior material (187) is installed on the wooden columns (82R, 83L). Such an exterior material (187) contributes to imparting resistance such as weather resistance and water resistance to the outside corner between the pair of walls (112, 113). The fact that such an exterior material (187) is installed on the pair of wooden columns (82R, 83L) contributes to the ability to easily construct the outside corner between the pair of walls (112, 113) into an obtuse angle. A pair of crossbars (162, 163) are respectively fixed to the pair of steel beams (62, 63) along the pair of steel beams (62, 63) under the pair of steel beams (62, 63), and these crossbars (162, 163) are joined to each other to form a corner. The upper part of the exterior material (187) is inserted inside the corner formed by the pair of crossbars (162, 163). These contribute to blocking the water intrusion path. Further, these contribute to imparting resistance such as weather resistance and water resistance to the intersection where the lower surface of the overhanging part (202) of the upper floor intersects the outer surfaces of the pair of walls (112, 113) and the vicinity thereof without impairing the workability of the intersection and the vicinity thereof.

[0009] According to the invention according to claim 2, there is provided an outside corner structure according to claim 1 or 2, wherein a portion of the exterior material (187) inserted inside the corner formed by the pair of crossbars (162, 163) is sandwiched between the pair of crossbars (162, 163) and the pair of wooden columns (82R, 83L).

[0010] According to the invention according to claim 2 as described above, the upper part of the exterior material (187) being sandwiched between the pair of rails (162, 163) and the pair of wooden columns (82L, 83R) contributes to imparting resistance such as weather resistance and water resistance to the intersection where the lower surface of the overhanging part (202) of the upper floor and the outer surfaces of the pair of walls (112, 113) intersect and the vicinity thereof, without impairing the workability at the intersection and in the vicinity thereof.

[0011] According to the invention according to claim 3, there is provided an external corner structure according to claim 1 or 2, wherein the external corner formed by the pair of walls (112, 113) is an obtuse angle.

[0012] As in the invention according to claim 3 as described above, even if the external corner formed by the pair of walls (112, 113) is an obtuse angle, the workability at the intersection where the lower surface of the overhanging part (202) of the upper floor and the outer surfaces of the pair of walls (112, 113) intersect and the vicinity thereof is not impaired, and resistance such as weather resistance and water resistance is imparted to the intersection and the vicinity thereof.

[0013] According to the invention according to claim 4, there is provided an external corner structure according to claim 1 or 2, further comprising a heat insulating material (323) packed between the pair of wooden columns (82R, 83L).

[0014] The invention according to claim 4 as described above contributes to improving the heat insulation of the external corner between the pair of walls (112, 113).

[0015] According to the invention according to claim 5, there is provided an external corner structure according to claim 4, wherein the upper part of the heat insulating material (323) is inserted inside the angle formed by the pair of rails (162, 163).

[0016] According to the invention according to claim 5 as described above, it contributes to improving the heat insulation of the external corner between the pair of walls (112, 113).

[0017] According to the invention according to claim 6, there is provided a corner structure according to claim 1 or 2, comprising a ceiling steel frame ramen structure having the pair of steel frame beams (62, 63) and provided along the ceiling of the lower floor, a wooden frame (150) having the pair of crossbars (162, 163) and provided below the ceiling steel frame ramen structure, and an eaves ceiling board (190) attached to the lower surface of the wooden frame (150).

[0018] According to the invention according to claim 7, there is provided a corner structure according to claim 6, wherein the pair of crossbars (162, 163) abut against the upper parts of the pair of walls (112, 113) outside the upper parts of the pair of walls (112, 113).

[0019] According to the invention according to claim 6 as described above, since the ceiling steel frame ramen structure is provided along the ceiling of the first floor, the wooden frame (150) is assembled to the ceiling steel frame ramen structure, and the eaves ceiling board (190) is attached to the lower surface of the wooden frame (150), the eaves ceiling board (190) is provided so as to extend downward away from the lower surface of the ceiling steel frame ramen structure. According to the invention according to claim 7 as described above, since the pair of crossbars (162, 163) abut against the upper parts of the pair of walls (112, 113) outside the upper parts of the pair of walls (112, 113), the water intrusion path is blocked.

Effect of the Invention

[0020] According to the present invention, good workability at the intersection where the lower surface of the overhanging part of the upper floor intersects with the outer surfaces on both sides of the corner of the lower floor and in the vicinity thereof is realized.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0022] Hereinafter, embodiments will be described with reference to the drawings. The features and technical effects of the embodiments will be understood from the following detailed description and drawings. However, the scope of the present invention is not limited to the embodiments disclosed below. Since the drawings are provided for illustrative purposes only, the scope of the present invention is not limited to the illustrations in the drawings.

[0023] 1. Overview of the Building Figs. 1 and 2 are diagrams showing the first floor portion of a three-story building 200. The first floor portion 201 of the building 200 has a hybrid structure combining a steel frame structure and a wooden structure. The second floor portion 202 and the third floor portion (not shown) of the building 200 are wooden structures. The building 200 is constructed in an overhang type, and the second and third floor portions of the building 200 project outward beyond the outer periphery of the first floor. The portion of the second floor that projects outward from the outer periphery of the first floor is referred to as the overhanging portion 202. The outer wall on the outer periphery of the second floor is provided on the outer periphery of the overhanging portion 202, and the inside of the outer wall is indoors. On the other hand, the outer wall on the outer periphery of the second floor may be provided inside the outer periphery of the overhanging portion 202, and the overhanging portion 202 may be a balcony.

[0024] The overhanging portion 202 may project from its outer periphery across the entire outer periphery of the first floor, or may project from a partial range of the outer periphery of the first floor. A terrace may be constructed outside the outer periphery of the first floor and under the overhanging portion 202. The terrace may be provided across the entire outer periphery of the first floor, or may be provided in a partial range of the outer periphery of the first floor. The terrace is also referred to as a deck or a wet edge.

[0025] 2. First floor corner structure Hereinafter, the first floor of the building 200 will be described in detail, and the first floor corner structure provided under the overhanging portion 202 will be described in detail.

[0026] As shown in FIGS. 1 and 2, the foundation 10 is constructed on the ground. The foundation 10 may be either a mat foundation or a strip foundation. FIG. 3 is a sectional view of a part of the foundation 10 and the pedestals 71 to 76. As shown in FIG. 3, the foundation 10 has rising portions 11 to 16. The rising portions 11 to 16 rise vertically from the ground. The rising portion 11 and the rising portion 16 are provided parallel to each other. In order, the rising portions 12, 13, 14, 15 rise from the end of the rising portion 11 to the end of the rising portion 16 along the outer periphery of the first floor of the building 200, and these rising portions 11 to 16 correspond to a part of the outer periphery of the first floor of the building 200. The rising portion 12 is continuous with the rising portion 11, and the angle between the rising portion 11 and the rising portion 12 forms an obtuse angle, specifically a 135° outside corner. The rising portion 13 is continuous with the rising portion 12, and the angle between the rising portion 12 and the rising portion 13 forms an obtuse angle, specifically a 135° outside corner. The rising portion 14 is continuous with the rising portion 13, and the angle between the rising portion 13 and the rising portion 14 forms an obtuse angle, specifically a 135° outside corner. The rising portion 15 is continuous with the rising portion 14, and the angle between the rising portion 14 and the rising portion 15 forms an obtuse angle, specifically a 135° outside corner. The rising portion 16 is continuous with the rising portion 15, and the angle between the rising portion 16 and the rising portion 15 forms an obtuse angle, specifically a 135° outside corner.

[0027] The foundation 10 has footings 17, 18 and footings 21 to 26 provided on the ground. The footing 17 is provided at the lower part of the outside corner formed by the rising portion 11 and the rising portion 12. The footing 18 is provided at the lower part of the outside corner formed by the rising portion 15 and the rising portion 16. The footings 21 to 26 are arranged around the rising portions 11 to 16. The footings 17, 18, 21 to 26 are arranged in a grid pattern. In order, the footings 21, 17, 18, 26 are arranged in a straight line. In order, the footings 22, 23, 24, 25 are arranged in a straight line, and the row of the footings 22, 23, 24, 25 and the row of the footings 21, 17, 18, 26 are parallel to each other.

[0028] Steel columns 31, 32, 33, 34, 35, 36, 37, 38 are provided in a state of being erected on footings 21, 22, 23, 24, 25, 26, 17, 18 respectively. The legs of steel columns 31, 32, 33, 34, 35, 36, 37, 38 are embedded in footings 21, 22, 23, 24, 25, 26, 17, 18 respectively and fixed to footings 21, 22, 23, 24, 25, 26, 17, 18 respectively. Steel columns 31, 32, 33, 34, 35, 36, 37, 38 extend vertically upward from footings 21, 22, 23, 24, 25, 26, 17, 18 respectively. Steel columns 31 - 38 are made of square steel pipes.

[0029] Figure 4 is a hidden view of the steel beams on the ceiling of the first floor. As shown in Figure 4, a plurality of ceiling main beams and ceiling secondary beams such as H - shaped steel are stretched between steel columns 31 - 38 at the ceiling height of the first floor. Specifically, ceiling main beam 41 is horizontally installed between steel column 31 and steel column 32. Ceiling main beam 42 is horizontally installed between steel column 37 and steel column 33. Ceiling main beam 43 is horizontally installed between steel column 38 and steel column 34. Ceiling main beam 44 is horizontally installed between steel column 36 and steel column 35. Ceiling main beam 43 is horizontally installed between steel column 38 and steel column 34. Ceiling main beam 45 is horizontally installed between steel column 31 and steel column 37. Ceiling main beam 46 is horizontally installed between steel column 32 and steel column 33. Ceiling main beam 47 is horizontally installed between steel column 37 and steel column 38. Ceiling main beam 48 is horizontally installed between steel column 33 and steel column 34. Ceiling main beam 49 is horizontally installed between steel column 38 and steel column 36. Ceiling main beam 50 is horizontally installed between steel column 34 and steel column 35. A plurality of ceiling secondary beams 55 - 57 are installed between adjacent ceiling main beams 41 - 50. Here, the main beam refers to the beam installed between columns, and the secondary beam refers to the beam installed between main beams.

[0030] As shown in FIG. 4, ceiling girders 42 and 43 are parallel to each other, ceiling girders 47 and 48 are parallel to each other, and these ceiling girders 42, 43, 47, and 48 are framed in a rectangular shape. Ceiling joists 55 to 57 parallel to ceiling girders 42 and 43 are installed between ceiling girders 47 and 48. Ceiling joists 58 and 59 parallel to ceiling girders 47 and 48 are installed between ceiling girders 42 and 43. Ceiling joists 55 to 57 are joined to these ceiling joists 58 and 59 so as to be orthogonal to ceiling joists 58 and 59.

[0031] Spark striking beams 62, 63, 64, and 65 are respectively arranged above rising portions 12, 13, 14, and 15. Spark striking beams 62, 63, 64, and 65 are made of steel skeleton beams such as H-shaped steel. Spark striking beam 62 is parallel to rising portion 12. Spark striking beam 62 is installed obliquely between ceiling girder 42 and ceiling joist 58, with respect to ceiling girder 42 and ceiling joist 58. One end of spark striking beam 61 is arranged near steel column 37, and the other end of spark striking beam 62 is arranged near the intersection of ceiling joist 58 and ceiling joist 56. Spark striking beam 63 is parallel to rising portion 13. Spark striking beam 63 is installed obliquely between ceiling joist 55 and ceiling joist 56, with respect to ceiling joist 55 and ceiling joist 56. One end of spark striking beam 63 is arranged near the intersection of ceiling joist 58 and ceiling joist 56, and the other end of spark striking beam 63 is arranged near the center of ceiling joist 55. Spark striking beam 64 is parallel to rising portion 14. Spark striking beam 64 is installed obliquely between ceiling joist 57 and ceiling joist 55, with respect to ceiling joist 57 and ceiling joist 55. One end of spark striking beam 64 is arranged near the center of ceiling joist 55, and the other end of spark striking beam 64 is arranged near the intersection of ceiling joist 57 and ceiling joist 58. Spark striking beam 65 is parallel to rising portion 15. Spark striking beam 65 is installed obliquely between ceiling girder 43 and ceiling joist 58, with respect to ceiling girder 43 and ceiling joist 58. One end of spark striking beam 65 is arranged near steel column 38, and the other end of spark striking beam 65 is arranged near the intersection of ceiling joist 58 and ceiling joist 57.

[0032] In addition to the steel columns 31 to 38, ceiling girders 41 to 50, and ceiling joists 56 to 59 shown in FIGS. 3 and 4, the building 200 is provided with steel columns, floor girders, floor joists, ceiling girders, and ceiling joists in the first - floor part. These steel columns, floor girders, floor joists, ceiling girders, and ceiling joists are framed by the steel - frame method to construct a ramen structure. The self - weight of the building 200 and external forces such as seismic forces are mainly borne by the ramen structure.

[0033] The steel columns 31 to 38, ceiling girders 41 to 50, and ceiling joists 56 to 59 shown in FIG. 4 are part of this ramen structure. In the rectangular area surrounded by the ceiling girder or ceiling joist located outside the outer periphery of the first floor in the ramen structure, braces are provided. Among the ramen structures, the ramen structure provided along the ceiling of the first floor is called a ceiling steel - frame ramen structure, and the ceiling steel - frame ramen structure has the above - mentioned ceiling girders, ceiling joists, and fire - striking beams.

[0034] As shown in FIG. 3, the foundations 71, 76 are respectively placed on the rising parts 11, 16 via the floor girders and are fixed to the floor girders by fastening tools such as anchors or bolt nuts. The foundations 71, 76 are horizontal members provided horizontally along the floor girders. The foundations 71, 76 are provided parallel to each other. Walls are built on these foundations 71, 76. The foundations 71, 76 are wooden square timbers. The foundations 71, 76 are, for example, solid wood materials or laminated woods.

[0035] The foundations 72, 73, 74, 75 are respectively placed on the rising parts 12, 13, 14, 15 via the ventilation base wheels and are respectively fixed to the rising parts 12, 13, 14, 15 by fixing tools such as anchor bolts. The foundations 72, 73, 74, 75 are wooden square timbers. The foundations 72, 73, 74, 75 are, for example, solid wood materials or laminated woods. In order, the foundations 72, 73, 74, 75 are continuous from the steel column 37 to the steel column 38 along the outer periphery of the first floor of the building 200, corresponding to a part of the outer periphery of the first floor of the building 200.

[0036] The edge of the base 72 abuts against the side surface of the steel column 37, and the angle between the base 72 and the base 71 is an obtuse angle such as 135°. The edge of the base 73 is butted against the edge of the base 72, and the bases 72 and 73 are horizontally continuous. The angle between the base 73 and the base 72 is an obtuse angle such as 135°. The edge of the base 74 is butted against the edge of the base 73, and the bases 73 and 74 are horizontally continuous. The angle between the base 74 and the base 73 is an obtuse angle such as 135°. The edge of the base 75 is butted against the edge of the base 74, and the bases 74 and 75 are horizontally continuous. The angle between the base 75 and the base 74 is an obtuse angle of 135°. The edge of the base 75 abuts against the side surface of the steel column 38, and the angle between the base 75 and the base 76 is an obtuse angle such as 135°.

[0037] The bases 72, 73, 74, and 75 are respectively provided in parallel with the spark-suppressing beams 62, 63, 64, and 65.

[0038] Figure 5 is a plan view showing the arrangement of the wooden columns 82L to 85L and 82R to 85R built on the bases 72 to 75. As shown in Figure 5, the wooden column 82L is built on the base 72 adjacent to the steel column 37, and the wooden column 82L is joined to the steel column 37 via the longitudinal crossbar and the bracket. The wooden column 82R is built on the base 72 closer to the base 73. The wooden column 83L is built on the base 73 closer to the base 72. The wooden column 83L and the wooden column 82R are juxtaposed close to each other at the angle between the base 73 and the base 72. The wooden column 83R is built on the base 73 closer to the base 74. The wooden column 84L is built on the base 74 closer to the base 73. The wooden column 84L and the wooden column 83R are juxtaposed close to each other at the angle between the base 74 and the base 73. The wooden column 84R is built on the base 74 closer to the base 75. The wooden column 85L is built on the base 75 closer to the base 74. The wooden column 85L and the wooden column 84R are juxtaposed close to each other at the angle between the base 75 and the base 74. The wooden column 85R is built on the base 75 adjacent to the steel column 38, and the wooden column 85R is joined to the steel column 38 via the longitudinal crossbar and the bracket.

[0039] Referring to FIG. 6, the joining structure between the wooden pillar 82R and the base 72 will be described. FIG. 6 is an exploded perspective view of the joining structure between the wooden pillar 82R and the base 72. As shown in FIG. 6, the splicing fitting 92R is fixed on the base 72 by bolts or screws, etc., and the wooden pillar 82R is fixed to the splicing fitting 92R by the joining tool 92Rz. Note that the bases 72, 73 are fixed on the rising portions 12, 13 via the ventilation base rings 12a, 13a.

[0040] The splicing fitting 92R has a base plate 92Rb and an insert plate 92Ra. The insert plate 92Ra is provided substantially perpendicular to the base plate 92Rb, and the insert plate 92Ra and the base plate 92Rb are integrated. The base plate 92Rb is laid on the base 72 and fixed on the base 72 by fasteners such as screws or bolts. The insert plate 92Ra is erected perpendicular to the upper surface of the base 72. The insert plate 92Ra has a plurality of through holes 92Rc passing through the insert plate 92Ra.

[0041] On the other hand, in the wooden pillar 82R, a slit 82Ra is cut out from the lower end of the wooden pillar 82R in the axial direction of the wooden pillar 82R, and the slit 82Ra opens at the lower end and two opposite side surfaces of the wooden pillar 82R. A plurality of insertion holes 82Rb penetrate from the other side surface of the wooden pillar 82R across the slit 82Ra to the opposite side surface in a direction parallel to the two opposite side surfaces. The fact that the slit 82Ra opens at the side surface of the wooden pillar 82R contributes to the insertion of the insert plate 92Ra into the slit 82Ra while moving the wooden pillar 82R in the lateral direction.

[0042] The lower end of the wooden post 82R is directed toward the base plate 92Rb on the base 72, and the insert plate 92Ra is inserted into the slit 82Ra. The through-hole 92Rc of the insert plate 92Ra is coaxial with the insertion hole 82Rb of the wooden post 82R. The joining tool 92Rz is driven into the wooden post 82R from the side of the wooden post 82R and penetrates the insert plate 92Ra. Specifically, the joining tool 92Rz is inserted into and fitted in the insertion hole 82Rb of the wooden post 82R and the through-hole 92Rc of the insert plate 92Ra. The joining tool 92Rz contributes to fixing the wooden post 82R to the insert plate 92Ra. The joining tool 92Rz is made of metal, for example, steel. The joining tool 92Rz may be made of wood. The joining tool 92Rz is, for example, a split bolt, a dowel, a dowel screw, a pin, or a drift pin. The entire joining tool 92Rz may fit within the insertion hole 82Rb and the through-hole 92Rc, and the joining tool 92Rz may not protrude from the insertion hole 82Rb.

[0043] In the example shown in FIG. 6, the insert plate 92Ra is perpendicular to the axial direction (longitudinal direction) of the base 72, and the width direction of the slit 82Ra is parallel to the axial direction of the base 72. In contrast, the insert plate 92Ra may be parallel to the axial direction of the base 72, and the width direction of the slit 82Ra may be perpendicular to the axial direction of the base 72.

[0044] A joining structure similar to the joining structure between the wooden post 82R and the base 72 is applied to the joining structure between the wooden post 82L and the base 72, the joining structure between the wooden post 83L and the base 73, the joining structure between the wooden post 83R and the base 73, the joining structure between the wooden post 84L and the base 74, the joining structure between the wooden post 84R and the base 74, the joining structure between the wooden post 85L and the base 75, and the joining structure between the wooden post 85R and the base 75.

[0045] The wooden columns 82L and 82R hang down from the fire-struck beam 62. The wooden column 82L is arranged closer to the steel column 37, and the wooden column 82R is arranged by the fire-struck beam 63. The wooden columns 83L and 83R hang down from the fire-struck beam 63. The wooden column 83L is arranged closer to the fire-struck beam 62, and the wooden column 83R is arranged closer to the fire-struck beam 64. The wooden columns 84L and 84R hang down from the fire-struck beam 64. The wooden column 84L is arranged closer to the fire-struck beam 63, and the wooden column 84R is arranged closer to the fire-struck beam 65. The wooden columns 85L and 85R hang down from the fire-struck beam 65. The wooden column 85L is arranged closer to the fire-struck beam 64, and the wooden column 85R is arranged closer to the steel column 38.

[0046] Referring to FIG. 7, the joining structure between the wooden column 82R and the fire-struck beam 62 will be described. FIG. 7 is an exploded perspective view of the joining structure between the wooden column 82R and the fire-struck beam. As shown in FIG. 7, a flange 102a parallel to the axial direction of the fire-struck beam 62 hangs down from the lower surface of the fire-struck beam 62 and is fixed to the lower surface of the fire-struck beam 62. The wooden column 82R is applied to the flange 102a and fixed to the flange 102a.

[0047] The flange 102a is constituted by one of the two webs 102b and 102c of the steel angle 102. Specifically, the axial direction (longitudinal direction) of the angle 102 is parallel to the axial direction of the fire-struck beam 62. One web 102c of the angle 102 is in surface contact with the lower surface of the fire-struck beam 62 and welded to the lower surface thereof, or fixed by high-strength bolt joining or the like. The other web 102b of the angle 102 hangs vertically from the lower surface of the fire-struck beam 62, and the other web 102b corresponds to the flange 102a.

[0048] The side surface of the wooden column 82R is applied to the flange 102a, and the wooden column 82R is fixed to the flange 102a by a fastener 102d such as a screw. The upper end of the wooden column 82R may be separated from the lower surface of the fire-struck beam 62, or may be in contact with the lower surface thereof. When the upper end of the wooden column 82R is separated from the lower surface of the fire-struck beam 62, a heat insulating material may be sandwiched between the upper end of the wooden column 82R and the lower surface of the fire-struck beam 62.

[0049] The joining structure similar to the joining structure of the wooden column 82R and the fire - striking beam 62 is applied to the joining structure of the wooden column 82L and the fire - striking beam 62, the joining structure of the wooden column 83L and the fire - striking beam 63, the joining structure of the wooden column 83R and the fire - striking beam 63, the joining structure of the wooden column 84L and the fire - striking beam 64, the joining structure of the wooden column 84R and the fire - striking beam 64, the joining structure of the wooden column 85L and the fire - striking beam 65, and the joining structure of the wooden column 85R and the fire - striking beam 65.

[0050] Referring to FIG. 8, the walls 112, 113, 114, and 115 built on the bases 72, 73, 74, and 75 respectively will be described. FIG. 8 is a horizontal cross - sectional view of these walls 112, 113, 114, and 115. As shown in FIG. 8, the walls 112, 113, 114, and 115 are arranged in order along the outer periphery of the first floor of the building 200, and these walls 112 - 115 correspond to a part of the outer periphery of the first floor of the building 200.

[0051] The walls 112 - 115 are made of wood. The wall 112 is provided between the wooden columns 82L and 82R, and both sides of the wall 112 are joined to the wooden columns 82L and 82R respectively. The wall 113 is provided between the wooden columns 83L and 83R, and both sides of the wall 113 are joined to the wooden columns 83L and 83R respectively. The wall 114 is provided between the wooden columns 84L and 84R, and both sides of the wall 114 are joined to the wooden columns 84L and 84R respectively. The wall 115 is provided between the wooden columns 85L and 85R, and both sides of the wall 115 are joined to the wooden columns 85L and 85R respectively.

[0052] FIG. 9 is a cross - sectional view showing the vertical cross - section along the cutting line IX - IX shown in FIG. 8 as viewed in the arrow direction. FIG. 10 is an enlarged view of the region X shown in FIG. 9. As shown in FIGS. 9 and 10, the upper part of the wall 112 is applied to the flange 102a, and the upper part of the wall 112 is fixed to the flange 102a by screws or the like, so that the upper part of the wall 112 is joined to the fire - striking beam 62. The upper end of the wall 112 is spaced from the lower surface of the fire - striking beam 62, and the heat - insulating material 142 is sandwiched between the upper end of the wall 112 and the lower surface of the fire - striking beam 62. Note that the heat - insulating material 142 may not be provided, and the upper end of the wall 112 may be in contact with the lower surface of the fire - striking beam 62.

[0053] Just as the upper part of wall 112 is joined to the striker beam 62 via the flange 102a, the upper parts of walls 1113, 114, and 115 are respectively joined to striker beams 63, 64, and 65.

[0054] As shown in FIG. 9, the lower part of wall 112 is joined to the base 72. Similarly, walls 113, 114, and 115 are respectively joined to bases 73, 74, and 75.

[0055] As shown in FIG. 8, one side of wall 112 is joined to the wooden post 82R, and the other side is joined to the wooden post 82L. One side of wall 113 is joined to the wooden post 83R, and the other side is joined to the wooden post 83L. One side of wall 114 is joined to the wooden post 84R, and the other side is joined to the wooden post 84L. One side of wall 115 is joined to the wooden post 85R, and the other side is joined to the wooden post 85L.

[0056] Walls 112 and 113 are arranged with wooden posts 82R and 83L placed between them, and the wooden posts 82R and 82L are spaced apart from each other. The corner between walls 112 and 113 forms an obtuse angle, specifically a 135° protruding corner. Similarly, the corner between walls 113 and 114 forms a 135° protruding corner, and the corner between walls 114 and 115 forms a 135° protruding corner.

[0057] Wall 112 has at least one wall panel 112a. By allocating the wall panel 112a to the area between the wooden posts 82L and 82R, wall 112 is constituted. The wall panel 112a has a rectangular frame body formed by assembling a pair of upper and lower wooden horizontal frame members and a pair of left and right wooden vertical frame members in a rectangular frame shape, and wooden face materials attached to the front and rear surfaces of the frame body. If necessary, the wall panel 112a may have one or more wooden cross members assembled to the rectangular frame body inside the rectangular frame body. The wall panel 112a may have a heat insulating material such as glass wool, rock wool, and foamed resin filled between the face materials. The wall panel 112a is a structural member that bears the load.

[0058] Similar to the wall 112, at least one wall panel 113a is assigned to the area between the wooden columns 83L and 83R to form the wall 113, at least one wall panel 114a is assigned to the area between the wooden columns 84L and 84R to form the wall 114, and at least one wall panel 115a is assigned to the area between the wooden columns 85L and 85R to form the wall 115. The wall panels 113a, 114a, and 115a are the same as the wall panel 112a.

[0059] FIG. 11 is an enlarged view of the area XI shown in FIG. 8. As shown in FIG. 11, the side member 112R is joined to one side surface of the wall panel 112a by an adhesive or screws or the like. On the other hand, the side member 82Rc is joined to the side surface of the wooden column 82R by an adhesive or screws or the like. The side member 112R and the side member 82Rc are overlapped in the wall thickness direction, that is, the width direction of the fire beam 62, and these side members 112R and 82Rc are joined to each other by an adhesive or screws or the like. Thereby, one side of the wall panel 112a is joined to the wooden column 82R. Similarly, the side member 113L is joined to one side surface of the wall panel 113a by an adhesive or screws or the like, the side member 83La is joined to the side surface of the wooden column 83L by an adhesive or screws or the like, and the side member 113L and the side member 83La are overlapped in the wall thickness direction, and these side members 113L and 83La are joined to each other by an adhesive or screws or the like.

[0060] The same joining structure as the joining structure between the wall panel 112a and the wooden column 82R is applied to the joining structure between the wall panel 113a and the wooden column 83R, the joining structure between the wall panel 114a and the wooden column 84L, the joining structure between the wall panel 114a and the wooden column 84R, and the joining structure between the wall panel 115a and the wooden column 85L.

[0061] As shown in FIG. 11, the wooden columns 82R and 82L are separated from each other. A heat insulating material 323 such as glass wool, rock wool, and foamed resin is packed between the wooden columns 82R and 83L. Similarly, as shown in FIG. 8, a heat insulating material 334 is packed between the wooden columns 83R and 84L, and a heat insulating material 345 is packed between the wooden columns 84R and 85L.

[0062] Figure 12 is a plan view of the wooden formwork 150 provided under the steel frame beam of the ceiling on the first floor. As shown in Figure 12, the wooden formwork 150 is assembled at the lower part of the area surrounded by the fire-stopping beams 62 - 65, the ceiling main beam 43, the ceiling secondary beam 59, and the ceiling main beam 42. The outer edge of the wooden formwork 150 follows the area surrounded by the fire-stopping beams 62 - 65, the ceiling main beam 43, the ceiling secondary beam 59, and the ceiling main beam 42.

[0063] The wooden formwork 150 has horizontal outer rails 153, 159, 154, horizontal diagonal rails 162 - 165, and a plurality of horizontal intermediate rails 170. The outer rails 153, 159, 154, the diagonal rails 162 - 165, and the plurality of intermediate rails 170 are made of wood.

[0064] The outer rail 153 is fixed to the lower surface of the ceiling main beam 43 by a fastener such as a bolt-nut fastener. The outer rail 153 extends along the ceiling main beam 43 from the steel frame beam 38 to the ceiling secondary beam 59. The outer rail 159 is fixed to the lower surface of the ceiling secondary beam 59 by a fastener such as a bolt-nut fastener. The outer rail 159 extends along the ceiling secondary beam 59 from the ceiling main beam 43 to the ceiling main beam 42. The outer rail 159 and the outer rail 153 are assembled at a right angle. The outer rail 154 is fixed to the lower surface of the ceiling main beam 42 by a fastener such as a bolt-nut fastener. The outer rail 154 extends along the ceiling main beam 42 from the ceiling secondary beam 59 to the steel frame column 37. The outer rail 154 and the outer rail 159 are assembled at a right angle.

[0065] The diagonal rail 162 extends along the fire-stopping beam 62 from the steel frame column 37 to the ceiling secondary beam 56 under the fire-stopping beam 62. The diagonal rail 162 is assembled diagonally to the outer rail 154 with respect to the outer rail 154. The diagonal rail 162 may be fixed to the lower surface of the fire-stopping beam 62 by a fastener such as a bolt-nut fastener.

[0066] The diagonal rail 163 extends along the fire-stopping beam 63 from the ceiling secondary beam 56 to the ceiling secondary beam 55 under the fire-stopping beam 63. The diagonal rail 163 is assembled diagonally to the diagonal rail 162 with respect to the diagonal rail 162. The angle between the diagonal rail 163 and the diagonal rail 162 is an obtuse angle of 135°. The diagonal rail 163 may be fixed to the lower surface of the fire-stopping beam 63 by a fastener such as a bolt-nut fastener.

[0067] The diagonal brace 164 extends along the striker beam 64 from the ceiling joist 55 to the ceiling joist 57 under the striker beam 64. The diagonal brace 164 is assembled to the diagonal brace 163 obliquely with respect to the diagonal brace 163. The angle between the diagonal brace 164 and the diagonal brace 163 is an obtuse angle of 135°. The diagonal brace 164 may be fixed to the lower surface of the striker beam 64 by a fastener such as a bolt-nut fastener.

[0068] The diagonal brace 165 extends along the striker beam 65 from the ceiling joist 57 to the steel column 38 under the striker beam 65. The diagonal brace 165 is assembled to the diagonal brace 164 obliquely with respect to the diagonal brace 164. The angle between the diagonal brace 165 and the diagonal brace 164 is an obtuse angle of 135°. The diagonal brace 165 is assembled to the outer brace 154 obliquely with respect to the outer brace 154. The diagonal brace 165 may be fixed to the lower surface of the striker beam 65 by a fastener such as a bolt-nut fastener.

[0069] The outer braces 153, 159, 154 and the diagonal braces 162 to 165 are assembled in a special-shaped frame form so as to form the outer edge of the wooden formwork 150, and a plurality of intermediate braces 170 are assembled to the special-shaped frame inside the special-shaped frame.

[0070] The eaves ceiling board 190 is attached to the lower surface of the wooden formwork 150. The eaves ceiling board 190 has the same outer peripheral shape as the outer peripheral shape of the wooden formwork 150. The eaves ceiling board 190 may have an exterior material attached thereto. The eaves ceiling board 190 may have weather resistance, water resistance, heat resistance or fire resistance.

[0071] As shown in FIG. 10, the diagonal strut 162 abuts against the upper part of the wall 112 outside the building rather than at the upper part of the wall 112 inside the building. Similarly, the diagonal strut 163 abuts against the upper part of the wall 113 outside the building rather than at the upper part of the wall 113 inside the building, the diagonal strut 164 abuts against the upper part of the wall 114 outside the building rather than at the upper part of the wall 114 inside the building, and the diagonal strut 165 abuts against the upper part of the wall 115 outside the building rather than at the upper part of the wall 115 inside the building. The upper parts of the walls 112, 113, 114, 115 may be respectively fixed to the diagonal struts 162, 163, 164, 165 by screws, adhesives or the like. In FIG. 10, although the diagonal strut 162 is spaced below the lower surface of the ridge beam 62, the diagonal strut 162 may abut against the lower surface of the ridge beam 62.

[0072] Although not shown, the wooden columns 82L, 83R protrude above the gable roof sheathing 190, and the diagonal strut 162 may abut against the upper parts of the wooden columns 82L, 82R outside the building rather than at the upper parts of the wooden columns 82L, 82R inside the building. Similarly, the wooden columns 83L, 84R protrude above the gable roof sheathing 190, and the diagonal strut 163 may abut against the upper parts of the wooden columns 83L, 84R outside the building rather than at the upper parts of the wooden columns 83L, 84R inside the building. Similarly, the wooden columns 84L, 85R protrude above the gable roof sheathing 190, and the diagonal strut 164 may abut against the upper parts of the wooden columns 84L, 85R outside the building rather than at the upper parts of the wooden columns 84L, 85R inside the building. The wooden columns 84L, 85R protrude above the gable roof sheathing 190, and the diagonal strut 165 may abut against the upper parts of the wooden columns 84L, 85R outside the building rather than at the upper parts of the wooden columns 84L, 85R inside the building.

[0073] FIG. 13 is a sectional view showing a vertical section along the cutting line XII-XII shown in FIG. 12 as viewed in the direction of the arrow. As shown in FIGS. 13, 2 and 8, the exterior material 199 rises from the edge of the gable roof sheathing 190 and is externally mounted on the outer strut 159. The exterior material 199 also covers the ceiling joist 59. As shown in FIGS. 1 and 8, the exterior material 192 rises from the edge of the gable roof sheathing 190 and is externally mounted on the outer strut 154. The exterior material 192 also covers the ceiling girder 42. As shown in FIG. 8, the exterior material 193 rises from the edge of the gable roof sheathing 190 and is externally mounted on the outer strut 153. The exterior material 193 also covers the ceiling girder 43.

[0074] As shown in FIG. 11, the upper part of the heat insulating material 323 packed between the wooden columns 82R and 83L is disposed at the corner between the diagonal struts 162 and 163 and abuts against these diagonal struts 162 and 163. Similarly, the upper part of the heat insulating material 334 packed between the wooden columns 83R and 84L abuts against the diagonal struts 163 and 164 at the corner between the diagonal struts 163 and 164. The upper part of the heat insulating material 345 packed between the wooden columns 84R and 85L abuts against the diagonal struts 164 and 165 at the corner between the diagonal struts 164 and 165.

[0075] As shown in FIGS. 9 to 11, one or a plurality of exterior materials 182 are externally mounted on the wall 112. When a plurality of exterior materials 182 are assigned to the wall 112, the gap between adjacent exterior materials 182 is sealed by a wet or dry joint material. The upper part of the exterior material 182 may be inserted between the diagonal strut 162 and the wall 112 and sandwiched therebetween. As shown in FIG. 10, the gap between the edge of the exterior material 182 and the eaves soffit 190 is sealed by a wet or dry joint material 182a.

[0076] As shown in FIG. 8, similar to the exterior material 182, one or a plurality of exterior materials 183 are externally mounted on the wall 113, one or a plurality of exterior materials 184 are externally mounted on the wall 114, and one or a plurality of exterior materials 185 are externally mounted on the wall 115. The joint material 182a shown in FIG. 10 seals not only the gap between the edge of the exterior material 182 and the eaves soffit 190 but also the gaps between the edges of the exterior materials 183, 184, and 185 and the eaves soffit 190.

[0077] As shown in FIG. 11, the exterior material 187 is attached to the wooden columns 82R and 83L, and the gap between the wooden columns 82R and 83L is blocked by the exterior material 187 from the outside. The exterior material 187 is bent to form an obtuse corner at the corner between the walls 112 and 113. The upper part of the exterior material 187 is inserted between the diagonal cross-member 162 and the wooden column 82R and is sandwiched between them. The upper part of the exterior material 187 is inserted between the diagonal cross-member 163 and the wooden column 83L and is sandwiched between them. The gap between the exterior material 187 and the adjacent exterior material 182 is sealed by a wet or dry joint material 187a, and the gap between the exterior material 187 and the adjacent exterior material 183 is sealed by a wet or dry joint material 187b. The upper part of the exterior material 182 may be inserted between the diagonal cross-member 162 and the wall 112 and be sandwiched between them.

[0078] As shown in FIG. 8, similar to the exterior material 187, the exterior material 188 is attached to the wooden columns 83R and 84L, and the gap between the wooden columns 83R and 84L is blocked by the exterior material 188 from the outside. Similarly, the exterior material 189 is attached to the wooden columns 84R and 85R, and the gap between the wooden columns 84R and 85L is blocked by the exterior material 189 from the outside. The joint material 182a shown in FIG. 10 seals not only the gaps between the exterior materials 182, 183, 184, 185 and the edge of the eaves board 190, but also the gaps between the exterior material 187 and the edge of the eaves board 190, the gap between the exterior material 188 and the edge of the eaves board 190, and the gap between the exterior material 189 and the edge of the eaves board 190.

[0079] The exterior materials 182 to 186 are made of steel plates subjected to aluminum-zinc alloy plating. The exterior materials 187 to 189, 192, 193, 199 are made of steel plates subjected to aluminum-zinc alloy plating stacked on wooden boards. These steel plates are, for example, Galvalume steel plates (registered trademark).

[0080] 3. Technically advantageous effects (1) At the outside corner between wall 112 and wall 113, wooden columns 82R and 83L are arranged in parallel. The wooden columns 82R and 83L are respectively built into the bases 72 and 73, and the wooden columns 82R and 83L are respectively joined to the fire-striking beams 62 and 63. Wall 112 is built between base 72 and fire-striking beam 62, and wall 113 is built between base 73 and fire-striking beam 63. These contribute to the ability to construct the outside corner between wall 112 and wall 113 firmly and also contribute to the ability to easily construct the outside corner into an obtuse angle.

[0081] (2) The exterior material 187 is formed so as to form an outside corner. The exterior material 187 is installed on the wooden columns 82R and 83L. Such an exterior material 187 contributes to imparting resistance such as weather resistance and water resistance to the outside corner between wall 112 and wall 113. The fact that such an exterior material 187 is installed on the wooden columns 82R and 83L contributes to the ability to easily construct the outside corner between wall 112 and wall 113 into an obtuse angle. Since the gap between the wooden column 82R and the wooden column 83L is blocked by the exterior material 187 from the outside, the outside and the inside are partitioned by the exterior material 187.

[0082] (3) The diagonal braces 162 and 163 are respectively fixed along the fire-striking beams 62 and 63 under the fire-striking beams 62 and 63, and these diagonal braces 162 and 163 are joined to each other so as to form an obtuse angle. The upper part of the exterior material 187 is inserted inside the angle formed by the diagonal braces 162 and 163. These contribute to blocking the water intrusion path. Further, these contribute to imparting resistance such as weather resistance and water resistance to the intersection where the lower surface of the overhanging part 202 of the second floor intersects the outer surfaces of walls 112 and 113 and the vicinity thereof without impairing the workability of the intersection and its vicinity. Such an advantageous effect is significantly enhanced by the upper part of the exterior material 187 being sandwiched between the diagonal braces 162 and 163 and the wooden columns 82L and 83R.

[0083] (4) The heat insulating material 323 is packed between the wooden columns 82R and 83L. This contributes to improving the heat insulation performance at the corner between the walls 112 and 113. Such an advantageous effect is significantly enhanced by arranging the upper part of the heat insulating material 323 at the corner between the diagonal beams 162 and 163.

[0084] (5) The ceiling steel frame ramen structure is provided along the ceiling of the first floor, and the wooden frame 150 is assembled to the ceiling steel frame ramen structure. Since the eaves ceiling board 190 is attached to the lower surface of the wooden frame 150, the eaves ceiling board 190 is provided horizontally extending downward from the lower surface of the ceiling steel frame ramen structure. The diagonal beams 162 and 163 of the wooden frame 150 are provided along the edge of the eaves ceiling board 190, and the wooden columns 82R, 83L, the walls 112, 113 and the exterior materials 182, 187, 187 protrude above the lower surface of the diagonal beams 162 and 163 inside the diagonal beams 162 and 163. Therefore, the workability at the intersection where the lower surface of the overhanging part 202 of the second floor intersects the outer surfaces of the walls 112 and 113 and in the vicinity thereof is not impaired, and resistance such as weather resistance and water resistance is imparted to the intersection and in the vicinity thereof.

[0085] (6) The joint material 182a shown in FIG. 10 seals the gaps between the exterior material 187 and the edge of the eaves ceiling board 190, the gaps between the exterior material 182 and the edge of the eaves ceiling board 190, and the gaps between the exterior material 183 and the edge of the eaves ceiling board 190. This contributes to blocking the water intrusion path.

[0086] (7) The same can be said for the corners between the walls 113 and 114 and the corners between the walls 114 and 115 as in the above (1) to (6).

[0087] (8) Even if the length of the wooden column 82R has an error from the distance from the base 72 to the striking beam 62 and the upper end of the wooden column 82R does not stably contact the lower surface of the striking beam 62, the flange 102a is joined to the lower surface of the striking beam 62, the flange 102a hangs down from the striking beam 62, and the side surface of the wooden column 82R contacts the flange 102a and is joined to the flange 102a. Therefore, the wooden column 82R is securely fixed to the striking beam 62. The same can be said for the other wooden columns 82L, 83L, 83R, 84L, 84R, 85L, 85R.

[0088] (9) When the striking beam 62 is erected before the wooden columns 82L, 82R are built in, in order to ensure that the wooden columns 82L, 82R are arranged between the striking beam 62 and the base 72 after the erection of the striking beam 62, it is necessary to make the length of the wooden columns 82L, 82R slightly shorter than the distance from the striking beam 62 to the base 72. Even in such a case, since the flange 102a hangs down from the striking beam 62 and the side surfaces of the wooden columns 82L, 82R contact the flange 102a and are joined to the flange 102a, the wooden columns 82L, 82R are securely fixed to the previously erected striking beam 62. That is, even if the upper ends of the wooden columns 82L, 82R are slightly separated from the lower surface of the striking beam 62, the flange 102a contributes to the fixation of the wooden columns 82L, 82R and the striking beam 62.

[0089] (10) When the angle 120 is attached to the striking beam 62, since the web 102c of the angle 120 is in surface contact with the lower surface of the striking beam 62 and is joined to the lower surface of the striking beam 62, the posture of the web 102b of the angle 120, that is, the posture of the flange 102a, is stabilized. The stabilization of the posture of the flange 102a contributes to the stabilization of the posture of the wooden columns 82L, 82R. Therefore, when building in the wooden columns 82L, 82R under the striking beam 62, the upper parts of the wooden columns 82L, 82R are stably fixed to the striking beam 62. The same can be said for the other wooden columns 83L, 83R, 84L, 84R, 85L, 85R.

[0090] (11) When the wooden column 82R is being installed, since the slit 82Ra and the insert plate 92Ra are movable relative to each other in the in-plane direction (the in-plane direction refers to the direction parallel to the insert plate 92Ra), even if the wooden column 82R is inclined with respect to the vertical direction, the insert plate 92Ra of the splicing fitting 92R can be inserted into the slit 82Ra of the wooden column 82R. Also, since the slit 82Ra opens not only at the lower end but also on the side surface of the wooden column 82R, even if the wooden column 82R is inclined with respect to the vertical direction, the insert plate 92Ra of the splicing fitting 92R can be inserted into the slit 82Ra of the wooden column 82R. Therefore, even if the length of the wooden column 82R is equal to the distance between the fire beam 62 and the foundation 72, the wooden column 82R can be easily installed between the fire beam 62 and the foundation 72. The same can be said for the other wooden columns 83L, 83R, 84L, 84R, 85L, 85R.

[0091] (12) Since a steel-frame ramen structure is adopted in the first-floor part of the building 200, the seismic resistance of the first-floor part of the building 200 is high and the lifespan is long. Therefore, the building 200 contributes to the achievement of goals such as so-called "building construction for continuous living" and "SDGs (Sustainable Development Goals: Sustainable Development Goals)".

[0092] (13) Wood is used in the first-floor part of the building 200, and the first-floor part 201 of the building 200 has a hybrid structure combining a steel frame and wood. The second and third floors of the building 200 are made of wood. The amount of carbon dioxide emissions from the production and processing of wood to exhaust is less than the amount of carbon dioxide emissions from the production and processing of steel to exhaust. Therefore, the building 200 contributes to the realization of a decarbonized society by promoting carbon neutrality that reduces the amount of carbon dioxide emissions to substantially zero, and also contributes to the achievement of the SDGs.

Explanation of symbols

[0093] 62, 63, 64, 65 Fire beam 72, 73, 74, 75 Foundation 82R, 83L, 83R, 83L, 84R, 85L Wooden column Walls 112, 113, 114, 115 Frame 150 Diagonal braces 162, 163, 164, 165 Exterior materials 187, 188, 189 Eaves board 190 Overhang 202 Insulation materials 323, 334, 345

Claims

1. The out-corner structure of the lower floor provided under the overhanging part of the upper floor that projects from the outer periphery of the lower floor of the building, A pair of wooden horizontal members joined to each other to form an angle, A pair of steel beams provided parallel to the pair of horizontal members respectively above each of the pair of horizontal members, A pair of wooden columns arranged in parallel with the angle in between, built on the pair of horizontal members respectively, and joined to the pair of steel beams respectively, A pair of walls built between the horizontal members and the steel beams, joined to the pair of wooden columns respectively, and forming an out-corner, A pair of wooden crossbars fixed to the pair of steel beams respectively along the pair of steel beams under the pair of steel beams, and joined to each other to form an angle, An exterior material formed to form an out-corner and installed on the pair of wooden columns, Comprising, The upper part of the exterior material is inserted into the inside of the angle formed by the pair of crossbars An out-corner structure characterized by this.

2. The out-corner structure according to Claim 1, Among the exterior materials, the part inserted into the inside of the angle formed by the pair of crossbars is sandwiched between the pair of crossbars and the pair of wooden columns An out-corner structure characterized by this.

3. The out-corner structure according to Claim 1 or 2, The out-corner formed by the pair of walls is an obtuse angle An out-corner structure characterized by this.

4. The out-corner structure according to Claim 1 or 2, A heat insulating material packed between the pair of wooden columns An out-corner structure further characterized by comprising this.

5. The out-corner structure according to Claim 4, The upper part of the heat insulating material is inserted into the inside of the angle formed by the pair of crossbars An out-corner structure characterized by this.

6. The out-corner structure according to Claim 1 or 2, Having the pair of steel beams, a ceiling steel ramen structure provided along the ceiling of the lower floor, Having the pair of crossbars, a wooden frame provided below the ceiling steel ramen structure, An eave ceiling board pasted on the lower surface of the wooden frame, An out-corner structure characterized by comprising this.

7. The out-corner structure according to Claim 6, The pair of crossbars abut on the upper parts of the pair of walls on the outdoor side rather than the upper parts of the pair of walls An out-corner structure characterized by this.

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