External 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 an outside corner structure. [Background technology]

[0002] Patent Document 1 discloses a rigid frame structure consisting of wooden columns and steel beams. The steel beams are made of H-shaped steel. A pair of bearing plates are attached to the bottom flange of the steel beam facing each other, and the head of the wooden column below the steel beam is sandwiched between these bearing plates. A through bolt passes through these bearing plates and the head, and a pair of nuts is fastened to both ends of the through bolt so as to sandwich the bearing plates and the head. The leg of the wooden column above the steel beam is similarly joined to the top flange of the steel column. The adjacent wooden column is similarly joined to the steel beam. Usually, a wall is provided in the area enclosed by the columns and beams.

[0003] Patent Document 2 discloses a building in which a second-floor overhanging structure overhangs the exterior of the first-floor exterior wall and a corner of the first floor is provided below the overhanging structure. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2023-9651 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-84594 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if the corner of the first floor is located under the overhang of the second floor, construction at the intersection where the underside of the overhang intersects with the outer surfaces of both sides of the corner and in the vicinity thereof is extremely difficult from the standpoints of durability, water resistance, weather resistance, etc. In particular, if the corner is not a right angle but exceeds 90°, construction becomes significantly more difficult. Therefore, the present invention aims to provide a technology that can achieve good workability at the intersection where the underside of the protrusion on the upper floor intersects with the outer surfaces on both sides of the corner of the lower floor, and in the vicinity thereof. [Means for solving the problem]

[0006] The following reference numerals in parentheses refer to FIGS. 1 to 13.

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

[0008] According to the invention of claim 1 as described above, the wooden pillars (82R, 83L) are arranged in parallel, the wooden pillars (82R, 83L) are erected on the horizontal members (72, 73), and the wooden pillars (82R, 83L) are joined to the steel beams (62, 63). One wall (112) is erected between one horizontal member (72) and one steel beam (62), and the other wall (113) is erected between the other horizontal member (73) and the other steel beam (63). These features contribute to the ability to firmly construct the protruding corner between the pair of walls (112, 113) and also contribute to the ability to easily construct the protruding corner at an obtuse angle. The exterior material 187 is formed to form a corner. The exterior material 187 is attached to the wooden posts 82R, 83L. This exterior material 187 contributes to providing weather resistance, water resistance, and other durability to the corner between the pair of walls 112, 113. Attaching this exterior material 187 to the pair of wooden posts 82R, 83L contributes to easily constructing the corner between the pair of walls 112, 113 at an obtuse angle. A pair of crosspieces (162, 163) is fixed to the pair of steel beams (62, 63) along the pair of steel beams (62, 63) below the pair of steel beams (62, 63), and these crosspieces (162, 163) are joined to each other to form an angle. The upper part of the exterior material (187) is inserted inside the angle formed by the pair of crosspieces (162, 163). This contributes to blocking the path of water infiltration. Furthermore, this contributes to providing weather resistance, water resistance, etc. to the intersection where the underside of the overhanging portion (202) of the upper floor intersects with the outer surfaces of the pair of walls (112, 113) and the vicinity thereof without compromising the ease of construction in the intersection and the vicinity thereof.

[0009] According to the invention of claim 2, there is provided an exterior corner structure as described in claim 1 or 2, characterized in that the portion of the exterior material (187) inserted inside the corner formed by the pair of battens (162, 163) is sandwiched between the pair of battens (162, 163) and the pair of wooden posts (82R, 83L).

[0010] According to the invention of claim 2 as described above, the upper part of the exterior material (187) is sandwiched between a pair of crosspieces (162, 163) and a pair of wooden pillars (82L, 83R), which contributes to imparting weather resistance, water resistance, and other durability to the intersection and its vicinity, without impairing the ease of construction at the intersection where the underside of the overhang (202) of the upper floor intersects with the outer surfaces of the pair of walls (112, 113) and its vicinity.

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

[0012] As in the invention of claim 3 described above, even if the corner formed by the pair of walls (112, 113) is an obtuse angle, the ease of construction at the intersection where the underside of the protrusion (202) of the upper floor intersects with the outer surfaces of the pair of walls (112, 113) 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 of claim 4, there is provided an exterior corner structure according to claim 1 or 2, further comprising a heat insulating material (323) packed between the pair of wooden posts (82R, 83L).

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

[0015] According to the invention of claim 5, there is provided an outside corner structure as described in claim 4, characterized in that the upper part of the insulation material (323) is inserted inside the corner formed by the pair of crosspieces (162, 163).

[0016] According to the invention as set forth in claim 5, the heat insulation of the corner between the pair of walls (112, 113) can be improved.

[0017] According to the invention of claim 6, there is provided a corner structure according to claim 1 or 2, characterized in that it comprises: a ceiling steel rigid frame structure having the pair of steel beams (62, 63) and installed along the ceiling of the lower floor; a wooden frame (150) having the pair of crosspieces (162, 163) and installed below the ceiling steel rigid frame structure; and a eaves board (190) attached to the underside of the wooden frame (150).

[0018] According to the invention of claim 7, there is provided an exterior corner structure as described in claim 6, characterized in that the pair of crosspieces (162, 163) abut against the upper parts of the pair of walls (112, 113) closer to the outdoors than the upper parts of the pair of walls (112, 113).

[0019] According to the invention of claim 6 as described above, a ceiling steel frame rigid frame structure is installed along the ceiling of the first floor, a wooden frame (150) is assembled to the ceiling steel frame rigid frame structure, and a soffit board (190) is attached to the underside of the wooden frame (150), so that the soffit board (190) is installed so as to extend downward away from the underside of the ceiling steel frame rigid frame structure. According to the seventh aspect of the invention, the pair of crosspieces (162, 163) abut against the upper portions of the pair of walls (112, 113) closer to the outdoors than the upper portions of the pair of walls (112, 113), thereby blocking the path for water to enter. [Effects of the Invention]

[0020] According to the present invention, good workability is achieved at the intersection where the underside of the overhanging portion of the upper floor intersects with the outer surfaces on both sides of the protruding corner of the lower floor, and in the vicinity thereof. [Brief explanation of the drawings]

[0021] [Figure 1] Figure 1 is a front view of the first floor of a three-story building. [Figure 2] Figure 2 is a side view of the first floor of a three-story building. [Figure 3] Figure 3 is a plan of the foundation and base. [Figure 4]Figure 4 is a plan of the steel beams on the first floor ceiling. [Figure 5] Figure 5 is a plan showing the layout of the wooden pillars erected on the foundation. [Figure 6] Figure 6 shows the joint structure between the wooden pillars and the foundation at the outer corners of the first floor. [Figure 7] Figure 7 shows the joint structure between the wooden pillars and the fire beams at the corners of the outer perimeter of the first floor. [Figure 8] Figure 8 is a horizontal cross section of the wall forming the corner of the first floor. [Figure 9] FIG. 9 is a vertical cross-sectional view taken along the line IX-IX shown in FIG. 8, viewed in the direction of the arrows. [Figure 10] FIG. 10 is an enlarged view of the region X shown in FIG. [Figure 11] FIG. 11 is an enlarged view of region XI shown in FIG. [Figure 12] Figure 12 is a plan of the wooden frame that will be installed under the steel rigid frame ceiling structure on the first floor. [Figure 13] 13 is a vertical cross-sectional view taken along the line XII-XII in FIG. 12, viewed in the direction of the arrows. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments will be described with reference to the drawings. 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. Because the drawings are provided for illustrative purposes only, the scope of the present invention is not limited to the examples in the drawings.

[0023] 1. Building Overview 1 and 2 are diagrams showing the first floor of a three-story building 200. The first floor 201 of the building 200 is a hybrid structure that combines steel and wood construction. The second floor 202 and the third floor (not shown) of the building 200 are made of wood. The building 200 is constructed in an overhanging style, with the second and third floors of the building 200 projecting out beyond the perimeter of the first floor. The part of the second floor that projects beyond the perimeter of the first floor is called the projecting part 202. The outer wall of the periphery of the second floor is provided on the periphery of the overhanging portion 202, and the inside of this outer wall is indoors. Alternatively, the outer wall of the periphery of the second floor may be provided inside the periphery of the overhanging portion 202, and the overhanging portion 202 may be a balcony.

[0024] The projection 202 may extend from the entire periphery of the first floor, or may extend from a partial range of the periphery of the first floor. The terrace may be constructed outside the perimeter of the first floor, under the overhang 202. The terrace may be provided along the entire perimeter of the first floor, or may be provided within a portion of the perimeter of the first floor. A terrace is also called a deck or veranda.

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

[0026] As shown in Figures 1 and 2, foundation 10 is constructed on the ground. Foundation 10 may be either a mat foundation or a strip foundation. Figure 3 is a plan view of a portion of foundation 10 and sills 71-76. As shown in Figure 3, foundation 10 has rising portions 11-16. Rising portions 11-16 rise vertically from the ground. Rising portions 11 and 16 are arranged parallel to each other. Rising portions 12, 13, 14, and 15 are connected in order from the end of rising portion 11 to the end of rising portion 16 along the perimeter of the first floor of building 200, and these rising portions 11-16 correspond to part of the perimeter of the first floor of building 200. Rising portion 12 is connected to rising portion 11, and the angle between rising portions 11 and 12 forms an obtuse angle, specifically a 135° external corner. Rising portion 13 is connected to rising portion 12, and the angle between rising portion 12 and rising portion 13 forms an obtuse angle, specifically an outside corner of 135°. Rising portion 14 is connected to rising portion 13, and the angle between rising portion 13 and rising portion 14 forms an obtuse angle, specifically an outside corner of 135°. Rising portion 15 is connected to rising portion 14, and the angle between rising portion 14 and rising portion 15 forms an obtuse angle, specifically an outside corner of 135°. Rising portion 16 is connected to rising portion 15, and the angle between rising portion 16 and rising portion 15 forms an obtuse angle, specifically an outside corner of 135°.

[0027] Foundation 10 has footings 17, 18 and footings 21 to 26 installed on the ground. Footing 17 is installed at the bottom of the corner formed by rising portion 11 and rising portion 12. Footing 18 is installed at the bottom of the corner formed by rising portion 15 and rising portion 16. Footings 21 to 26 are arranged around rising portions 11 to 16. Footings 17, 18, 21 to 26 are arranged in a lattice pattern. Footings 21, 17, 18, and 26 are arranged in a straight line in order. Footings 22, 23, 24, and 25 are arranged in a straight line in order, and the row of footings 22, 23, 24, and 25 and the row of footings 21, 17, 18, and 26 are parallel to each other.

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

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

[0030] As shown in Figure 4, ceiling girders 42, 43 are parallel to each other, and ceiling girders 47, 48 are parallel to each other, and these ceiling girders 42, 43, 47, 48 are framed in the shape of a rectangular frame. Ceiling joists 55-57 parallel to the ceiling girders 42, 43 are erected between the ceiling girders 47, 48. Ceiling joists 58, 59 parallel to the ceiling girders 47, 48 are erected between the ceiling girders 42, 43. Ceiling joists 55-57 are joined to these ceiling joists 58, 59 so as to be perpendicular to the ceiling joists 58, 59.

[0031] The flint beams 62, 63, 64, and 65 are respectively arranged above the rising portions 12, 13, 14, and 15. The flint beams 62, 63, 64, and 65 are made of steel beams such as H-shaped steel beams. The fire beam 62 is parallel to the rising portion 12. The fire beam 62 is erected between the ceiling main beam 42 and the ceiling joist 58 at an angle to the ceiling main beam 42 and the ceiling joist 58. One end of the fire beam 61 is arranged near the steel column 37, and the other end of the fire beam 62 is arranged near the intersection of the ceiling joist 58 and the ceiling joist 56. The flint beam 63 is parallel to the rising portion 13. The flint beam 63 is erected between the ceiling joists 55 and 56 at an angle to the ceiling joists 55 and 56. One end of the flint beam 63 is located near the intersection of the ceiling joists 58 and 56, and the other end of the flint beam 63 is located near the center of the ceiling joists 55. The flint beam 64 is parallel to the rising portion 14. The flint beam 64 is installed diagonally to the ceiling joist 57 and the ceiling joist 55, between the ceiling joist 57 and the ceiling joist 55. One end of the flint beam 64 is located near the center of the ceiling joist 55, and the other end of the flint beam 64 is located near the intersection of the ceiling joist 57 and the ceiling joist 58. The fire beam 65 is parallel to the rising portion 15. The fire beam 65 is erected between the ceiling main beam 43 and the ceiling joist 58 at an angle to the ceiling main beam 43 and the ceiling joist 58. One end of the fire beam 65 is located near the steel column 38, and the other end of the fire beam 65 is located near the intersection of the ceiling joist 58 and the ceiling joist 57.

[0032] 3 and 4, the building 200 also has steel columns, floor girders, floor beams, ceiling girders, and ceiling beams on the first floor, and a rigid frame structure is constructed by assembling these steel columns, floor girders, floor beams, ceiling girders, and ceiling beams using a steel frame construction method. The weight of the building 200 itself and external forces such as earthquake forces are mainly borne by the rigid frame structure.

[0033] Steel columns 31-38, ceiling girders 41-50, and ceiling joists 56-59 shown in Figure 4 are part of this rigid frame structure. Within the rigid frame structure, braces are provided in the rectangular area surrounded by the ceiling girders or ceiling joists located outside the perimeter of the first floor. Within the rigid frame structure, the rigid frame structure installed along the first floor ceiling is called a ceiling steel rigid frame structure, and this ceiling steel rigid frame structure has the above-mentioned ceiling girders, ceiling joists, and bracing beams.

[0034] As shown in FIG. 3, the bases 71 and 76 rest on the rising portions 11 and 16, respectively, via floor girders, and are fixed to the floor girders with fasteners such as anchors or bolts and nuts. The bases 71 and 76 are horizontal members installed horizontally along the floor girders. The bases 71 and 76 are installed parallel to each other. Walls are erected on these bases 71 and 76. The bases 71 and 76 are wooden timbers. The bases 71 and 76 are made of, for example, solid wood or laminated wood.

[0035] Bases 72, 73, 74, and 75 rest on the rising sections 12, 13, 14, and 15, respectively, via ventilation base rings, and are fixed to the rising sections 12, 13, 14, and 15, respectively, with fasteners such as anchor bolts. Bases 72, 73, 74, and 75 are wooden timbers. Bases 72, 73, 74, and 75 are made of, for example, solid wood or laminated wood. Bases 72, 73, 74, and 75 are connected in order from steel column 37 to steel column 38 along the perimeter of the first floor of building 200, and these bases 72, 73, 74, and 75 correspond to part of the perimeter of the first floor of building 200.

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

[0037] Bases 72, 73, 74, and 75 are provided parallel to the flint beams 62, 63, 64, and 65, respectively.

[0038] FIG. 5 is a plan view showing the arrangement of wooden pillars 82L-85L and 82R-85R erected on foundations 72-75. As shown in FIG. 5, wooden pillar 82L is erected on foundation 72 adjacent to steel pillar 37, and wooden pillar 82L is joined to steel pillar 37 via vertical beams and brackets. Wooden pillar 82R is erected on foundation 72, close to foundation 73. Wooden pillar 83L is erected on foundation 73, close to foundation 72. Wooden pillars 83L and 82R are arranged side by side and close to each other at the corner between foundations 73 and 72. Wooden pillar 83R is erected on foundation 73, close to foundation 74. Wooden pillar 84L is erected on foundation 74, close to foundation 73. Wooden pillar 84L and 83R are arranged side by side and close to each other at the corner between foundations 74 and 73. Wooden pillar 84R is erected on top of foundation 74, close to base 75. Wooden pillar 85L is erected on top of foundation 75, close to base 74. Wooden pillars 85L and 84R are arranged side by side and close to each other at the corner between bases 75 and 74. Wooden pillar 85R is erected on top of foundation 75, adjacent to steel pillar 38, and is joined to steel pillar 38 via vertical beams and brackets.

[0039] The joining structure between the wooden pole 82R and the base 72 will be described with reference to Figure 6. Figure 6 is an exploded perspective view of the joining structure between the wooden pole 82R and the base 72. As shown in Figure 6, a joint fitting 92R is fixed onto the base 72 with bolts or screws, and the wooden pole 82R is fixed to the joint fitting 92R with a connector 92Rz. The bases 72 and 73 are fixed onto the rising portions 12 and 13 via ventilation base rings 12a and 13a.

[0040] The joint fitting 92R has a base plate 92Rb and an insert plate 92Ra. The insert plate 92Ra is disposed approximately perpendicular to the base plate 92Rb, and the insert plate 92Ra and the base plate 92Rb are integrated. The base plate 92Rb is placed face down on the base 72 and fixed to the top of the base 72 with fasteners such as screws or bolts. The insert plate 92Ra stands perpendicular to the upper surface of the base 72. The insert plate 92Ra has a plurality of through holes 92Rc that penetrate the insert plate 92Ra.

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

[0042] The lower end of the wooden pole 82R faces the base plate 92Rb on the foundation 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 pole 82R. A connector 92Rz is driven into the wooden pole 82R from the side and penetrates the insert plate 92Ra. Specifically, the connector 92Rz is inserted and fitted into the insertion hole 82Rb of the wooden pole 82R and the through-hole 92Rc of the insert plate 92Ra. The connector 92Rz contributes to fastening the wooden pole 82R to the insert plate 92Ra. The connector 92Rz is made of metal, for example, steel. The connector 92Rz may also be made of wood. The connector 92Rz is, for example, a threaded bolt, a dowel, a dowel screw, a pin, or a drift pin. The entire connector 92Rz may fit into the insertion hole 82Rb and the through-hole 92Rc, and the connector 92Rz may not protrude from the insertion hole 82Rb.

[0043] 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. Alternatively, 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 joint structure similar to the joint structure between wooden pillar 82R and base 72 is applied to the joint structure between wooden pillar 82L and base 72, the joint structure between wooden pillar 83L and base 73, the joint structure between wooden pillar 83R and base 73, the joint structure between wooden pillar 84L and base 74, the joint structure between wooden pillar 84R and base 74, the joint structure between wooden pillar 85L and base 75, and the joint structure between wooden pillar 85R and base 75.

[0045] Wooden pillars 82L, 82R hang down from the flint beam 62. Wooden pillar 82L is positioned close to the steel pillar 37, and wooden pillar 82R is positioned by the flint beam 63. Wooden pillars 83L, 83R hang down from the flint beam 63. Wooden pillar 83L is positioned close to the flint beam 62, and wooden pillar 83R is positioned close to the flint beam 64. Wooden pillars 84L, 84R hang down from the flint beam 64. Wooden pillar 84L is positioned close to the flint beam 63, and wooden pillar 84R is positioned close to the flint beam 65. Wooden pillars 85L, 85R hang down from the flint beam 65. Wooden pillar 85L is positioned close to the flint beam 64, and wooden pillar 85R is positioned close to the steel pillar 38.

[0046] The joint structure between the wooden pillar 82R and the flint beam 62 will be described with reference to Figure 7. Figure 7 is an exploded perspective view of the joint structure between the wooden pillar 82R and the flint beam. As shown in Figure 7, a flange 102a parallel to the axial direction of the flint beam 62 hangs down from the underside of the flint beam 62 and is fixed to the underside of the flint beam 62, and the wooden pillar 82R is abutted against the flange 102a and fixed to the flange 102a.

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

[0048] The side of the wooden pole 82R is abutted against the flange 102a, and the wooden pole 82R is fixed to the flange 102a with fasteners 102d such as screws. The upper end of the wooden pole 82R may be spaced apart from the lower surface of the flare beam 62, or may abut against the lower surface. If the upper end of the wooden pole 82R is spaced apart from the lower surface of the flare beam 62, a heat insulating material may be sandwiched between the upper end of the wooden pole 82R and the lower surface of the flare beam 62.

[0049] A joint structure similar to the joint structure between wooden pillar 82R and flint beam 62 is applied to the joint structure between wooden pillar 82L and flint beam 62, the joint structure between wooden pillar 83L and flint beam 63, the joint structure between wooden pillar 83R and flint beam 63, the joint structure between wooden pillar 84L and flint beam 64, the joint structure between wooden pillar 84R and flint beam 64, the joint structure between wooden pillar 85L and flint beam 65, and the joint structure between wooden pillar 85R and flint beam 65.

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

[0051] Walls 112 to 115 are made of wood. Wall 112 is provided between wooden pillar 82L and wooden pillar 82R, and both sides of wall 112 are joined to wooden pillars 82L and 82R, respectively. Wall 113 is provided between wooden pillar 83L and wooden pillar 83R, and both sides of wall 113 are joined to wooden pillars 83L and 83R, respectively. Wall 114 is provided between wooden pillar 84L and wooden pillar 84R, and both sides of wall 114 are joined to wooden pillars 84L and 84R, respectively. Wall 115 is provided between wooden pillar 85L and wooden pillar 85R, and both sides of wall 115 are joined to wooden pillars 85L and 85R, respectively.

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

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

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

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

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

[0057] The wall 112 has at least one wall panel 112a. The wall 112 is constructed by placing the wall panel 112a in the area between the wooden columns 82L and 82R. The wall panel 112a has a rectangular frame formed by assembling a pair of upper and lower wooden horizontal frames and a pair of left and right wooden vertical frames into a rectangular frame shape, and wooden face panels attached to the front and rear surfaces of the frame. If necessary, the wall panel 112a may have one or more wooden crosspieces attached to the rectangular frame inside the rectangular frame. The wall panel 112a may have an insulating material such as glass wool, rock wool, or foamed resin filled between the face panels. The wall panel 112a is a structural material that bears loads.

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

[0059] FIG. 11 is an enlarged view of region XI shown in FIG. 8. As shown in FIG. 11, side member 112R is joined to one side of wall panel 112a with adhesive or screws. Meanwhile, side member 82Rc is joined to the side of wooden post 82R with adhesive or screws. Side members 112R and 82Rc are overlapped in the wall thickness direction, i.e., the width direction of the flint beam 62, and these side members 112R and 82Rc are joined to each other with adhesive or screws. This joins one side of wall panel 112a to wooden post 82R. Similarly, side member 113L is joined to one side of wall panel 113a with adhesive or screws, and side member 83La is joined to the side of wooden post 83L with adhesive or screws. Side members 113La and 83La are overlapped in the wall thickness direction, and these side members 113L and 83La are joined to each other with adhesive or screws.

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

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

[0062] Figure 12 is a plan view of a wooden frame 150 installed under the steel beams of the ceiling on the first floor. As shown in Figure 12, the wooden frame 150 is assembled under the area surrounded by the fire beams 62 to 65, the ceiling girder 43, the ceiling joist 59, and the ceiling girders 42. The outer edge of the wooden frame 150 runs along the area surrounded by the fire beams 62 to 65, the ceiling girders 43, the ceiling joist 59, and the ceiling girders 42.

[0063] The wooden frame 150 has horizontal outer beams 153, 159, and 154, horizontal diagonal beams 162 to 165, and a plurality of horizontal center beams 170. The outer beams 153, 159, and 154, the diagonal beams 162 to 165, and the plurality of center beams 170 are made of wood.

[0064] The outer crosspiece 153 is fixed to the underside of the ceiling girder 43 with fasteners such as bolt and nut fasteners. The outer crosspiece 153 extends along the ceiling girder 43 from the steel beam 38 to the ceiling joist 59. The outer crosspiece 159 is fixed to the underside of the ceiling joist 59 with fasteners such as bolt and nut fasteners. The outer crosspiece 159 extends along the ceiling joist 59 from the ceiling girder 43 to the ceiling joist 42. The outer crosspiece 159 and the outer crosspiece 153 are assembled at a right angle. The outer crosspiece 154 is fixed to the underside of the ceiling girder 42 with fasteners such as bolt and nut fasteners. The outer crosspiece 154 extends along the ceiling girder 42 from the ceiling joist 59 to the steel column 37. The outer crosspiece 154 and the outer crosspiece 159 are assembled at a right angle.

[0065] The diagonal beam 162 extends along the flint beam 62 from the steel column 37 to the ceiling joist 56 below the flint beam 62. The diagonal beam 162 is assembled to the outer beam 154 at an angle relative to the outer beam 154. The diagonal beam 162 may be fixed to the underside of the flint beam 62 by fasteners such as bolt and nut fasteners.

[0066] The diagonal beam 163 extends along the flint beam 63 from the ceiling joist 56 to the ceiling joist 55 below the flint beam 63. The diagonal beam 163 is assembled to the diagonal beam 162 at an angle relative to the diagonal beam 162. The angle between the diagonal beam 163 and the diagonal beam 162 is an obtuse angle of 135°. The diagonal beam 163 may be fixed to the underside of the flint beam 63 by a fastener such as a bolt and nut fastener.

[0067] Diagonal beam 164 extends along diagonal beam 64 from ceiling joist 55 to ceiling joist 57 below diagonal beam 64. Diagonal beam 164 is assembled to diagonal beam 163 at an angle relative to diagonal beam 163. The angle between diagonal beam 164 and diagonal beam 163 is an obtuse angle of 135°. Diagonal beam 164 may be fixed to the underside of diagonal beam 64 by a fastener such as a bolt and nut fastener.

[0068] The diagonal beam 165 extends along the flanking beam 65 from the ceiling joist 57 to the steel column 38 below the flanking beam 65. The diagonal beam 165 is assembled into the diagonal beam 164 at an angle relative to the diagonal beam 164. The angle between the diagonal beam 165 and the diagonal beam 164 is an obtuse angle of 135°. The diagonal beam 165 is assembled into the outer beam 154 at an angle relative to the outer beam 154. The diagonal beam 165 may be fixed to the underside of the flanking beam 65 by fasteners such as bolt and nut fasteners.

[0069] The outer crosspieces 153, 159, 154 and the diagonal crosspieces 162 to 165 are assembled into an irregular frame shape to form the outer edge of the wooden frame 150, and a plurality of middle crosspieces 170 are assembled to the irregular frame inside the irregular frame.

[0070] A soffit board 190 is attached to the underside of the wood framing 150. The soffit board 190 has the same outer periphery as the outer periphery of the wood framing 150. The soffit board 190 may have exterior material attached to it. The soffit board 190 may be weather-resistant, water-resistant, heat-resistant, or fire-resistant.

[0071] As shown in Fig. 10, diagonal beam 162 abuts against the upper part of wall 112 closer to the outdoors than the upper part of wall 112. Similarly, diagonal beam 163 abuts against the upper part of wall 113 closer to the outdoors than the upper part of wall 113, diagonal beam 164 abuts against the upper part of wall 114 closer to the outdoors than the upper part of wall 114, and diagonal beam 165 abuts against the upper part of wall 115 closer to the outdoors than the upper part of wall 115. The upper parts of walls 112, 113, 114, and 115 may be fixed to diagonal beams 162, 163, 164, and 165, respectively, with screws or adhesive. Note that, although diagonal beam 162 is spaced below and away from the underside of flint beam 62 in Fig. 10, diagonal beam 162 may also abut against the underside of flint beam 62.

[0072] Although not shown, the wooden posts 82L, 83R may protrude above the eaves top board 190, and the diagonal crosspiece 162 may abut against the upper parts of the wooden posts 82L, 82R closer to the outdoors than the upper parts of the wooden posts 82L, 82R. Similarly, the wooden posts 83L, 84R may protrude above the eaves top board 190, and the diagonal crosspiece 163 may abut against the upper parts of the wooden posts 83L, 84R closer to the outdoors than the upper parts of the wooden posts 83L, 84R. Similarly, the wooden posts 84L, 85R may protrude above the eaves top board 190, and the diagonal crosspiece 164 may abut against the upper parts of the wooden posts 84L, 85R closer to the outdoors than the upper parts of the wooden posts 84L, 85R. The wooden posts 84L, 85R may protrude above the eaves top board 190, and the diagonal crosspiece 165 may abut against the upper parts of the wooden posts 84L, 85R closer to the outdoors than the upper parts of the wooden posts 84L, 85R.

[0073] Figure 13 is a cross-sectional view showing a vertical cross section taken along the cutting line XII-XII shown in Figure 12 as viewed in the direction of the arrows. As shown in Figures 13, 2, and 8, an exterior material 199 rises from the edge of the eaves top board 190 and is attached to the outer crosspiece 159. The exterior material 199 also covers the ceiling joists 59. As shown in Figures 1 and 8, an exterior material 192 rises from the edge of the eaves top board 190 and is attached to the outer crosspiece 154. The exterior material 192 also covers the ceiling girders 42. As shown in Figure 8, an exterior material 193 rises from the edge of the eaves top board 190 and is attached to the outer crosspiece 153. The exterior material 193 also covers the ceiling girders 43.

[0074] 11, the upper part of the insulating material 323 packed between the wooden posts 82R and 83L is positioned at the corner between the diagonal beam 162 and the diagonal beam 163, and abuts against these diagonal beams 162 and 163. Similarly, the upper part of the insulating material 334 packed between the wooden posts 83R and 84L abuts against the diagonal beams 163 and 164 at the corner between the diagonal beam 163 and the diagonal beam 164. The upper part of the insulating material 345 packed between the wooden posts 84R and 85L abuts against the diagonal beams 164 and 165 at the corner between the diagonal beam 164 and the diagonal beam 165.

[0075] As shown in Figures 9 to 11, one or more exterior materials 182 are attached to the wall 112. When multiple exterior materials 182 are attached to the wall 112, gaps between adjacent exterior materials 182 are sealed with a wet or dry joint material. The upper part of the exterior material 182 may be inserted between the diagonal beam 162 and the wall 112 and sandwiched therebetween. As shown in Figure 10, the gap between the exterior material 182 and the edge of the eaves board 190 is sealed with a wet or dry joint material 182a.

[0076] 8, similar to the exterior material 182, one or more exterior materials 183 are sheathed to the wall 113, one or more exterior materials 184 are sheathed to the wall 114, and one or more exterior materials 185 are sheathed to the wall 115. The joint material 182a shown in FIG. 10 seals not only the gap between the exterior material 182 and the edge of the eaves board 190, but also the gap between the exterior material 183 and the edge of the eaves board 190, the gap between the exterior material 184 and the edge of the eaves board 190, and the gap between the exterior material 185 and the edge of the eaves board 190.

[0077] As shown in FIG. 11 , exterior materials 187 are attached to wooden posts 82R and 83L, and the gap between the wooden posts 82R and 83L is sealed by the exterior material 187 from the outdoors. The exterior material 187 is bent to form an obtuse corner that fits the angle between wall 112 and wall 113. The upper part of the exterior material 187 is inserted between the diagonal crosspiece 162 and the wooden post 82R and sandwiched therebetween. The upper part of the exterior material 187 is inserted between the diagonal crosspiece 163 and the wooden post 83L and sandwiched therebetween. The gap between the exterior material 187 and the adjacent exterior material 182 is sealed with wet or dry joint material 187a, and the gap between the exterior material 187 and the adjacent exterior material 183 is sealed with wet or dry joint material 187b. The upper part of the exterior material 182 may also be inserted between the diagonal crosspiece 162 and the wall 112 and sandwiched therebetween.

[0078] As shown in Fig. 8, similar to the exterior material 187, the exterior material 188 is attached to the wooden posts 83R, 84L, and the gaps between the wooden posts 83R, 84L are blocked from the outdoor side by the exterior material 188. Similarly, the exterior material 189 is attached to the wooden posts 84R, 85R, and the gaps between the wooden posts 84R, 85L are blocked from the outdoor side by the exterior material 189. 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 top board 190, but also the gaps between the exterior material 187 and the edge of the eaves top board 190, the gaps between the exterior material 188 and the edge of the eaves top board 190, and the gaps between the exterior material 189 and the edge of the eaves top board 190.

[0079] Exterior materials 182-186 are made of aluminum-zinc alloy plated steel sheets. Exterior materials 187-189, 192, 193, and 199 are made of aluminum-zinc alloy plated steel sheets stacked on wooden boards. These steel sheets are, for example, Galvalume Steel Sheets (registered trademark).

[0080] 3. Technically advantageous effects (1) At the corner between wall 112 and wall 113, wooden pillars 82R and 83L are arranged in parallel, and wooden pillars 82R and 83L are erected on foundations 72 and 73, respectively, and wooden pillars 82R and 83L are joined to flint beams 62 and 63, respectively. Wall 112 is erected between foundation 72 and flint beam 62, and wall 113 is erected between foundation 73 and flint beam 63. These contribute to the ability to construct the corner between wall 112 and wall 113 firmly, and also contribute to the ability to easily construct the corner at an obtuse angle.

[0081] (2) The exterior material 187 is formed to form a projecting corner. The exterior material 187 is sheathed to the wooden posts 82R, 83L. Such exterior material 187 contributes to imparting weather resistance, water resistance, and other durability to the projecting corner between the wall 112 and the wall 113. The sheathing of the wooden posts 82R, 83L with such exterior material 187 contributes to facilitating the construction of an obtuse angle projecting corner between the wall 112 and the wall 113. Since the gap between the wooden posts 82R and 83L is sealed from the outdoors by the exterior material 187, the outdoors and the indoors are separated by the exterior material 187.

[0082] (3) The diagonal beams 162, 163 are fixed to the beams 62, 63 along the beams 62, 63, respectively, below the beams, and these diagonal beams 162, 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 beams 162, 163. These features contribute to blocking water penetration. Furthermore, these features contribute to providing weather resistance, water resistance, and other resistance to the intersections and their vicinity where the undersides of the second-floor projections 202 intersect with the outer surfaces of the walls 112, 113, without compromising the ease of construction in the area. These advantageous effects are significantly enhanced by sandwiching the upper part of the exterior material 187 between the diagonal beams 162, 163 and the wooden columns 82L, 83R.

[0083] (4) The insulating material 323 is packed between the wooden posts 82R and 83L. This contributes to improving the thermal insulation of the corner between the wall 112 and the wall 113. This advantageous effect is significantly enhanced by the fact that the upper part of the insulating material 323 is located at the corner between the diagonal beam 162 and the diagonal beam 163.

[0084] (5) A steel ceiling frame rigid frame structure is installed along the ceiling of the first floor, and a wooden frame 150 is assembled to the steel ceiling frame rigid frame structure. The eaves top board 190 is attached to the underside of the wooden frame 150, so that the eaves top board 190 extends horizontally downward away from the underside of the steel ceiling frame rigid frame structure. The diagonal beams 162, 163 of the wooden frame 150 are installed along the edges of the eaves top board 190, and the wooden columns 82R, 83L, walls 112, 113, and exterior materials 182, 187, 187 protrude above the underside of the diagonal beams 162, 163 on the inside of the diagonal beams 162, 163. This provides weather resistance, water resistance, and other resistance to the intersections and their vicinity without impairing the ease of construction of the intersections and their vicinity where the undersides of the second-floor overhangs 202 and the outer surfaces of the walls 112, 113 intersect.

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

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

[0087] (8) Even if the length of wooden pillar 82R has an error from the distance from base 72 to flint beam 62, and the upper end of wooden pillar 82R does not stably abut on the underside of flint beam 62, flange 102a is joined to the underside of flint beam 62, flange 102a hangs down from flint beam 62, and the side of wooden pillar 82R abuts on flange 102a and is joined to flange 102a, so wooden pillar 82R is reliably fixed to flint beam 62. The same can be said for the other wooden pillars 82L, 83L, 83R, 84L, 84R, 85L, and 85R.

[0088] (9) When the flint beam 62 is erected before the wooden pillars 82L, 82R are erected, in order for the wooden pillars 82L, 82R to be reliably positioned between the flint beam 62 and the foundation 72 after the flint beam 62 is erected, the length of the wooden pillars 82L, 82R needs to be slightly shorter than the distance from the flint beam 62 to the foundation 72. Even in such a case, the flange 102a hangs down from the flint beam 62, and the side surfaces of the wooden pillars 82L, 82R abut against the flange 102a and are joined to the flange 102a, so the wooden pillars 82L, 82R are reliably fixed to the flint beam 62 that was erected earlier. In other words, even if the upper ends of the wooden pillars 82L, 82R are slightly separated from the underside of the flint beam 62, the flange 102a contributes to fixing the wooden pillars 82L, 82R and the flint beam 62.

[0089] (10) When attaching the angle 120 to the flint beam 62, the web 102c of the angle 120 is in surface contact with the underside of the flint beam 62 and joined to the underside of the flint beam 62, stabilizing the posture of the web 102b of the angle 120, i.e., the flange 102a. The stability of the posture of the flange 102a contributes to the stability of the posture of the wooden pillars 82L, 82R. Therefore, when erecting the wooden pillars 82L, 82R under the flint beam 62, the upper parts of the wooden pillars 82L, 82R are stably fixed to the flint beam 62. The same can be said for the other wooden pillars 83L, 83R, 84L, 84R, 85L, 85R.

[0090] (11) When installing the wooden pillar 82R, the slit 82Ra and the insert plate 92Ra can move relatively in the in-plane direction (the in-plane direction refers to the direction parallel to the insert plate 92Ra). This allows the insert plate 92Ra of the joint fitting 92R to be inserted into the slit 82Ra of the wooden pillar 82R even if the wooden pillar 82R is tilted relative to the vertical direction. Furthermore, because the slit 82Ra opens not only at the bottom end of the wooden pillar 82R but also on the side, the insert plate 92Ra of the joint fitting 92R can be inserted into the slit 82Ra of the wooden pillar 82R even if the wooden pillar 82R is tilted relative to the vertical direction. Therefore, even if the length of the wooden pillar 82R is equal to the distance between the flint beam 62 and the base 72, the wooden pillar 82R can be easily installed between the flint beam 62 and the base 72. The same can be said for the other wooden pillars 83L, 83R, 84L, 84R, 85L, and 85R.

[0091] (12) Because a steel-frame rigid frame structure is used for the first floor of Building 200, the first floor of Building 200 has high earthquake resistance and a long lifespan. Therefore, Building 200 contributes to achieving goals such as so-called "sustainable urban development" and the "SDGs (Sustainable Development Goals)."

[0092] (13) Wood is used on the first floor of building 200, and first floor 201 of building 200 is a hybrid structure combining steel and wood. The second and third floors of building 200 are made of wood. The carbon dioxide emissions from the production and processing of wood to its exhaust are less than the carbon dioxide emissions from the production and processing of steel to its exhaust. Therefore, building 200 not only contributes to the realization of a decarbonized society by promoting carbon neutrality, which reduces carbon dioxide emissions to virtually zero, but also contributes to the achievement of the SDGs. [Explanation of symbols]

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

Claims

1. A corner structure for the lower floor provided under a protruding portion of the upper floor protruding from the periphery of the lower floor of a building, a pair of horizontal wooden beams joined together at an angle; A pair of steel beams provided above each of the pair of horizontal members and parallel to each of the pair of horizontal members; A pair of wooden pillars arranged in parallel with the corners therebetween, erected on the pair of horizontal members, and joined to the pair of steel beams, respectively; A pair of walls are erected between the horizontal member and the steel beam, joined to the pair of wooden columns respectively, and form an external corner; a pair of wooden beams fixed to the pair of steel beams along the pair of steel beams below the pair of steel beams and joined to each other so as to form an angle; An exterior material formed to form an external corner and exteriorly attached to the pair of wooden posts; Equipped with The upper part of the exterior material is inserted inside the corner formed by the pair of bars. A corner structure characterized by:

2. The external corner structure according to claim 1, The portion of the exterior material inserted inside the corner formed by the pair of crosspieces is sandwiched between the pair of crosspieces and the pair of wooden posts. A corner structure characterized by:

3. The external corner structure according to claim 1 or 2, The corner formed by the pair of walls is an obtuse angle. A corner structure characterized by:

4. The external corner structure according to claim 1 or 2, Heat insulation material packed between the pair of wooden poles The external corner structure further comprises:

5. The external corner structure according to claim 4, The upper part of the heat insulating material is inserted inside the corner formed by the pair of bars. A corner structure characterized by:

6. The external corner structure according to claim 1 or 2, a ceiling steel frame rigid frame structure having the pair of steel beams and installed along the ceiling of the lower floor; a wooden frame having the pair of crosspieces and installed below the ceiling steel frame rigid frame structure; A soffit board attached to the underside of the wooden frame; An external corner structure characterized by comprising:

7. The external corner structure according to claim 6, The pair of crosspieces abut against the upper portions of the pair of walls at a position closer to the outside than the upper portions of the pair of walls. A corner structure characterized by:

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