10m high, 4-storey steel-framed building construction method

Abstract

To provide a four-storied building with a height of 10 m which enables a person to comfortably live indoor in current Building Standard Law.SOLUTION: A construction method for four-storied steel construction with a height of 10 m includes: a ceiling joist which is fixed onto a center line of a lower surface of a crest part of a deck plate constituting a floor slab by a screw nail for a ceiling joist; a ceiling material which is fixed to the lower surface of the ceiling joist by a screw nail for a ceiling material; an aseismatic M-shaped frame in which four braces are welded and joined to two steel columns composed of parallel square steel tubes having the same shape in an M shape; and 1 / 20 or less of a roof gradient composed of a gable roof.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] This invention relates to a four-story building to be constructed in an area with a 10m height limit set by the Building Standards Act. [Background technology]

[0002] There are various restrictions imposed by the Building Standards Act on the construction of new buildings. For example, in Type 1 Low-rise Residential Districts and Type 2 Low-rise Residential Districts, there are restrictions on shade, and the height of buildings is restricted to 10m or less.

[0003] For this reason, when constructing a multi-story building in an area where the height is restricted to 10m or less, it has been common to build no more than three stories, taking into account the interior height.

[0004] However, three-story apartment buildings have a significantly fewer number of units per building than four-story apartment buildings, which means fewer housing units per land area, which is disadvantageous from the perspective of making effective use of the land. Summary of the Invention [Problem to be solved by the invention]

[0005] However, there are many areas with height restrictions of 10 meters, and housing demand has not kept up with supply.

[0006] If a height of 10m were divided into four using conventional technology, the effective interior height of each floor would be around 2m in order to maintain the space in the ceiling base and the strength of the floor. This falls outside the standard set out in the Building Standards Act that states "the interior ceiling height of habitable rooms must be 2.1m or more," making it impossible to use the rooms as living spaces.

[0007] This invention has been made in consideration of the above problems, and its objective is to provide a 10m high, four-story building that meets the current Building Standards Act and allows people to live comfortably indoors. [Means for solving the problem]

[0008] In order to solve this problem, the invention described in claim 1 is a construction method for a 10m high, four-story steel-framed building, which comprises a rafter fixed to the center line of the underside of the crest of the deck plate that constitutes the floor slab with a rafter screw, ceiling material fixed to the underside of the rafter with ceiling material screw, an earthquake-resistant M-shaped frame in which four braces are welded in an M shape to two parallel steel columns made of identical square steel pipes, and a gable roof with a roof slope of less than 1 / 20. As a result, the interior height from the top of the foundation slab (31) on the first floor to the bottom of the ceiling material (364) on the first floor is 2310 mm, as shown by the dimension (G). The total dimension (F) from the top of the second floor floor slab (20) to the bottom of the ceiling material (364) on the floor below is 168 mm. Furthermore, the interior height from the top of the flooring (381) installed on the top of the second floor floor slab (20) to the bottom of the ceiling material on the second floor is 2310 mm, as shown by the dimension (E). The total dimension (D) from the top of the floor slab (19) on the third floor to the bottom of the ceiling material on the floor below is 168 mm. Furthermore, the interior height from the top of the flooring installed on the top of the third floor floor slab (19) to the bottom of the ceiling material on the third floor is 2310 mm, as shown by the dimension (C). The calculated dimension (B) is 168 mm, the interior height from the top of the flooring installed on the top surface of the 4th floor floor slab (18) to the bottom of the 4th floor ceiling material is 2396 mm as shown by the dimension (A), the slope of the gable roof is 1 / 20, the dimension (K) showing half the size of the frontage from the outside of the ALC wall panel (15) to the ridge of the gable roof is 2730 mm, and the decorative slate roof (32) that forms the roof, the asphalt roofing (22) and the sheathing boards (21) that waterproof the roof are 2396 mm. The height of the roof consisting of the (structural plywood) and the attic is 164.9mm as shown by dimension (J), and the dimension from GL (ground level) constructed in this way to the maximum height of the building is 9994.9mm as shown by dimension (I). By constructing it in this way, it is possible to ensure that "indoor ceiling heights of habitable rooms shall be 2.1m or more" as stipulated by the Building Standards Act, even in a 10m high, four-story building, and it has been ensured that indoor heights allow people to live comfortably, even in a 10m high, four-story building. It is characterized by: Effect of the Invention

[0012] According to the invention described in claim 1, in a construction method for a 10m-high, four-story steel-framed building, a rafter fixed to the center line of the underside of the crest of the deck plate that constitutes the floor slab with a rafter screw, ceiling material fixed to the underside of the rafter with ceiling material screw, an earthquake-resistant M-shaped frame consisting of four braces welded in an M shape to two parallel steel columns made of identical square steel pipes, and a gable roof with a roof slope of less than 1 / 20. Therefore, the interior height dimension from the top of the foundation slab (31) on the first floor to the bottom of the ceiling material (364) on the first floor is shown by the dimension value (G). The total dimension (F) from the top of the second floor floor slab (20) to the bottom of the ceiling material (364) on the floor below is 168 mm. The interior height from the top of the flooring (381) installed on the top of the second floor floor slab (20) to the bottom of the ceiling material on the second floor is 2310 mm as shown by the dimension (E). The total dimension (D) from the top of the third floor floor slab (19) to the bottom of the ceiling material on the floor below is 168 mm. The interior height from the top of the flooring installed on the top surface of the 4th floor floor slab (18) to the bottom of the ceiling material on the 3rd floor is 2310 mm as shown by the dimension value (C), the total dimension value (B) from the top of the 4th floor floor slab (18) to the bottom of the ceiling material on the floor below is 168 mm, the interior height from the top of the flooring installed on the top surface of the 4th floor floor slab (18) to the bottom of the ceiling material on the 4th floor is 2396 mm as shown by the dimension value (A), and the roof formed by a gable roof is 2396 mm. The slope of the building is 1 / 20, the dimension (K) showing half the width of the frontage from the outside of the ALC wall panel (15) to the ridge of the gable roof is 2730 mm, and the height of the roof consisting of the decorative slate roofing (32) that forms the roof, the asphalt roofing (22) that waterproofs the roof, the sheathing boards (21) (structural plywood) and the attic is 164.9 mm as shown by the dimension (J). The dimension from the GL (ground level) configured in this way to the maximum height of the building is 9994.9 mm as shown by the dimension (I). With this configuration, even in a 10m high, four-story building, it is possible to ensure that the "indoor ceiling height of living rooms shall be 2.1m or more" as stipulated by the Building Standards Act, and an indoor height that allows people to live comfortably is ensured even in a 10m high, four-story building. This makes it possible to ensure an interior height that allows people to live comfortably inside the building while also achieving high earthquake resistance. EXAMPLES

[0016] Hereinafter, an embodiment of the present invention will be described. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] 1 to 17 show an embodiment of the present invention.

[0018] Fig. 1 shows a steel frame structure 1 for constructing a steel frame building. A plan view of a number of anchor bolts 16 embedded in predetermined positions in foundation concrete 17, a first floor earthquake-resistant M-shaped frame 5 of steel frame structure fixed to the anchor bolts 16, a second floor slab 20 and a second floor earthquake-resistant M-shaped frame 4 of steel frame structure, a third floor slab 19 and a third floor earthquake-resistant M-shaped frame 3 of steel frame structure, a fourth floor slab 18 and a fourth floor earthquake-resistant M-shaped frame 2 of steel frame structure, an ALC wall panel 15 constituting the exterior wall, sheathing boards 21 (structural plywood) constituting the gable roof, asphalt roofing 22 for waterproofing the roof, and decorative slate roofing 32 are also shown.

[0019] The fourth floor slab 18, third floor slab 19, and second floor slab 20 shown in Fig. 1 are constructed of the same structure, and the third floor steel structure M-shaped frame 3 and second floor steel structure M-shaped frame 4 for seismic reinforcement of the building are formed of the same shape. Furthermore, the first floor steel structure M-shaped frame 30, second floor steel structure M-shaped frame 29, third floor steel structure M-shaped frame 28, and fourth floor steel structure M-shaped frame 27 are constructed of the first floor steel structure M-shaped frame 5, second floor steel structure M-shaped frame 4, third floor steel structure M-shaped frame 3, and fourth floor steel structure M-shaped frame 2, which are the same shape but are inverted from left to right, and are shown installed on opposite sides of the same floor.

[0020] Figure 2 shows the interior height of each floor from the first to fourth floors described in Figure 1, the height dimensions of the floor slabs and under-floor ceiling pockets on each floor, and the height dimensions of the roof, as well as the dimension from GL (ground level) to the maximum height of the building, indicated as dimension value I. The indoor height dimension from the top of the foundation slab 31 on the first floor to the bottom of the ceiling material 364 (shown in Figure 16) on the first floor is about 2310 mm as shown by dimension value G, the combined dimension F from the top of the floor slab 20 on the second floor to the bottom of the ceiling material 364 (shown in Figure 16) on the floor below is about 168 mm, the indoor height from the top of the flooring 381 (shown in Figure 16) installed on the top of the floor slab 20 on the second floor to the bottom of the ceiling material on the second floor is about 2310 mm as shown by dimension value E, the combined dimension D from the top of the floor slab 19 on the third floor to the bottom of the ceiling material on the floor below is about 168 mm, the indoor height from the top of the flooring installed on the top of the floor slab 19 on the third floor to the bottom of the ceiling material on the third floor is about 2310 mm as shown by dimension value C, and the combined dimension F from the top of the floor slab 18 on the fourth floor to the bottom of the ceiling material on the floor below is about 168 mm. Value B is approximately 168 mm, and the interior height from the top of the flooring installed on the top surface of the 4th floor floor slab 18 to the underside of the 4th floor ceiling material is approximately 2396 mm, as shown by dimension value A, the slope of the gable roof is 1 / 20, and dimension value K indicating half the size of the frontage from the outside of the ALC wall panel 15 to the ridge of the gable roof is approximately 2730 mm, and further, at the ridge of the gable roof, the height dimension of the part that constitutes the roof, which is the sum of the decorative slate roofing 32 that forms the roof, the asphalt roofing 22 for waterproofing the roof, the sheathing boards 21 (structural plywood), and the attic part, is approximately 164.9 mm, as shown by dimension value J, and the dimension from GL (ground level) configured in this way to the maximum height of the building is approximately 9994.9 mm, as shown by dimension value I. By configuring it in this way, it is possible to ensure that even in a 10m high, four-story building, the "interior ceiling height of living rooms must be at least 2.1m" as stipulated in the Building Standards Act, and it is now possible to ensure the interior height required for people to live comfortably, even in a 10m high, four-story building.

[0021] 3 is a perspective view of the earthquake-resistant M-shaped frame 5 for the first floor of a steel frame structure, foundation concrete 17, anchor bolts 16, and girders 11 and 12 described in FIG. 1. The earthquake-resistant M-shaped frame 5 for the first floor of a steel frame structure is composed of a third steel column 13 and a fourth steel column 14, which are made of two square steel pipes with sides of 100 mm and a thickness of 4.5 mm, arranged in parallel at intervals of 700 mm, a lower beam frame 52 made of an H-shaped steel with a height of 200 mm, sides of 100 mm, a flange thickness of 8 mm, a web thickness of 5.5 mm, and a length of approximately 900 mm, with flange surfaces welded to the lower ends of the two third steel columns 13 and the fourth steel columns 14, and a first brace 48 attached to the upper end of the center line of the plate mounting surface 57 of the third steel column 13. Two brace fixing upper end plates 45 are formed of flat steel plates of the same shape and trapezoidal shape, with the ends welded together to sandwich the plates in a sandwich shape. Two brace fixing upper and lower center plates 46 are formed of flat steel plates of the same shape and rectangular shape, with the ends of the second brace 49 and the third brace 50 welded together to sandwich the plates in a sandwich shape on the center line of the plate mounting surface 57. The lower end of the plate mounting surface 57 is welded together to sandwich the end of the fourth brace 51. The brace fixing lower end plates 47 are formed of flat steel plates of the same shape and are welded together as shown in FIG. 1, and two brace fixing upper plates 53 are formed of flat steel plates of the same shape and are welded together so as to sandwich the ends of the first brace 48 and the second brace 49 at a quarter position from the top end on the center line of the plate mounting surface 55 of the fourth steel column 14. The ends of the third brace 50 and the fourth brace 51 are also supported at a quarter position from the bottom end on the center line of the plate mounting surface 55. The brace fixing upper plate 45, the brace fixing upper and lower center plates 46, and the brace fixing lower end plate 47 are welded to the plate mounting surface 57 of the third steel column 13, while the brace fixing upper plate 53 and the brace fixing lower plate 54 are welded to the plate mounting surface 55 of the fourth steel column 14 located opposite each other. Each plate has a side length of 80 mm and a wall thickness of 2.The ends of the four first braces 48, second brace 49, third brace 50, and fourth brace 51 formed from 3 mm square rectangular steel pipes are welded together in an M shape, and an upper end plate 62 formed from a square flat steel plate about 100 mm long, about 100 mm wide, and 9 mm thick is welded together to the upper end of the third steel column 13, and a beam fixing plate 44 formed from a rectangular flat steel plate about 100 mm long, about 270 mm wide, and 9 mm thick is welded together to the upper end of the fourth steel column 14. The figure shows a state in which the girder lower flange (A) 75 of the girder 11 and the girder lower flange (B) 81 of the girder 12, which are made of two identical H-shaped steel pieces with a height dimension of 200 mm, side dimension of 100 mm, flange thickness of 8 mm, and web thickness of 5.5 mm fixed at right angles to an L shape with two splice plates 40, bolts 41, and nuts (not shown), are placed on the upper surfaces of the upper end plate 62 and the beam fixing plate 44, and the L-shaped girder 11 and girder 12 are fixed to the third steel column 13 and the fourth steel column 14 with bolts 42 and 43.

[0022] Fig. 4 is a perspective view of the M-shaped earthquake-resistant frame 5 for the first floor of a steel frame structure explained in Fig. 3, excluding the girders 11 and 12 attached to the top, and the anchor bolts 16 and concrete foundation 17 at the bottom. By assembling the M-shaped earthquake-resistant frame 5 for the first floor of a steel frame structure configured in this way in a factory using an assembly jig, it is now possible to manufacture the M-shaped earthquake-resistant frame 5 for the first floor of a steel frame structure with improved assembly precision.

[0023] Fig. 5 shows an exploded view of the earthquake-resistant M-shaped frame 5 for the first floor of a steel frame structure described in Fig. 3. The frame includes an upper end plate 62 having four bolt holes 61 formed in a roughly square shape on a square flat steel plate having a side of about 100 mm and a thickness of 9 mm, for welding to a steel column upper end (A) 84 at the upper end of a third steel column 13 formed from a square rectangular steel pipe having a side of 100 mm, a thickness of 4.5 mm and a length of about 1926 mm, four beam fixing nuts 85 for welding to a steel column mounting surface (A) 83 on the underside of the four bolt holes 61 formed in the upper end plate 62, and further, four bolt holes 61 formed in the upper end plate 62. Two brace fixing upper end plates 45 made of flat steel plates of the same shape and trapezoidal shape are welded to the upper end of the plate mounting surface 57, two upper and lower central plates 46 made of flat steel plates of the same shape and rectangular shape are welded to the upper and lower central parts of the plate mounting surface 57 of the third steel column 13, two lower end plates 47 made of flat steel plates of the same shape and rectangular shape are welded to the lower end of the plate mounting surface 57 of the third steel column 13, and a fourth A beam fixing plate 44 is made of a rectangular flat steel plate with a length of about 100 mm, a width of about 270 mm, and a thickness of 9 mm, and has four bolt holes 63 formed at approximately the four corners of the plate to be welded to the upper end (B) 89 of the steel column 14 at the upper end of the steel column 14. Further, two brace fixing upper plates 53 are made of flat steel plates with the same rectangular shape, and are welded to a quarter position from the upper end on the center line of the plate mounting surface 55 of the fourth steel column 14. The lower brace fixing lower plates 54 are made of flat steel plates of the same rectangular shape and are welded to a position one-quarter of the way from the bottom end of the brace. Furthermore, the steel column lower end (A) 90 of the third steel column 13 and the steel column lower end (B) 92 of the fourth steel column 14 are welded to the flange surfaces of the lower beam frame 52 made of H-shaped steel. The lower beam frame 52 is made of H-shaped steel with a height of 200 mm, a side dimension of 100 mm, a flange thickness of 8 mm, a web thickness of 5.5 mm, and a length of approximately 900 mm.

[0024] Furthermore, in FIG. 5, in order to attach the upper end plate 62 and the beam fixing plate 44 welded to the tops of the third steel column 13 and the fourth steel column 14 to the lower flange (A) 75 of the main girder 11 and the lower flange (B) 81 of the main girder 12 fixed at right angles to an L shape, four bolt holes 77 are formed at the positions of the lower flange (A) 75 of the main girder that face the four bolt holes 61 formed in the upper end plate 62 of the third steel column 13, and four bolts 42 are shown for fixing the lower flange (A) 75 of the main girder 12 to four beam fixing nuts 85 welded to the underside of the upper end plate 62. Similarly, four bolt holes 79 are formed in the lower flange (B) 81 of the girder that corresponds to the four bolt holes 63 formed in the beam fixing plate 44 of the fourth steel column 14, and four bolts 43 and four nuts 87 are shown for fixing the lower flange (B) 81 of the girder 12 to the beam fixing plate 44.

[0025] Figure 6 shows a front view of the earthquake-resistant M-shaped frame 5 for the first floor of a steel frame structure described in Figure 3, and also shows, in enlarged views in Figures 6a to 6e, the upper end plate 45 for fixing the brace, the upper and lower central plates 46 for fixing the brace, and the lower end plate 47 for fixing the brace welded to the plate mounting surface 57 of the third steel column 13, as well as the upper plate 53 for fixing the brace and the lower plate 54 for fixing the brace welded to the plate mounting surface 55 of the fourth steel column 14.

[0026] 6a shows the third steel column 13 by a dotted line, and the brace fixing upper end plate 45 welded to the plate mounting surface 57 at the upper end of the third steel column 13 by a solid line. The brace fixing upper end plate 45 is two trapezoidal plates with a thickness of 6 mm formed in the same shape to sandwich and fix the end of the first brace 48 formed from a square steel pipe with one side of 80 mm and a thickness of 2.3 mm to the plate mounting surface 57 of the third steel column 13, and has a side (A) 110 with a dimension of approximately 81 mm, a side (B) 111 with a dimension of approximately 99 mm, a side (C) 112 with a dimension of approximately 70 mm, a steel column mounting portion 113 with a dimension of approximately 140 mm, and The angle M at which side (A) 110 and side (B) 111 intersect is approximately 240 degrees, the angle at which side (B) 111 and side (C) 112 intersect is 90 degrees, the angle at which side (C) 112 intersects with steel column mounting portion 113 is 90 degrees, and the angle L at which steel column mounting portion 113 intersects with side (A) 110 is approximately 300 degrees.The state in which the tip at which side (A) 110 and steel column mounting portion 113 intersect is positioned so as to be located at the upper end of plate mounting surface 57, and steel column mounting portion 113 is welded and joined to plate mounting surface 57 is shown.

[0027] 6b shows the third steel column 13 in dotted lines and the brace fixing upper and lower central plates 46 welded to the upper and lower centers of the plate mounting surface 57 of the third steel column 13 in solid lines. The brace fixing upper and lower central plates 46 are two rectangular plates with a thickness of 6 mm formed in the same shape to sandwich the ends of the second brace 49 and the third brace 50 formed from square steel pipes with a side length of 80 mm and a thickness of 2.3 mm and fix them to the plate mounting surface 57 of the third steel column 13. The dimensions of the side (E) 114 are approximately 70 mm, the dimensions of the side (F) 115 are approximately 230 mm, the dimensions of the side (G) 116 are approximately 70 mm, and the dimensions of the steel column mounting part 117 are approximately 230 mm. The state shown is that the upper and lower central parts of the steel column mounting part 117 are abutted against the upper and lower centers of the plate mounting surface 57 and welded to each other.

[0028] FIG. 6c shows the third steel column 13 in dotted lines, and the brace fixing lower end plate 47 welded to the plate mounting surface 57 at the lower end of the third steel column 13 in solid lines. The brace fixing lower end plate 47 is made of two identical rectangular plates with a thickness of 6 mm, which are used to sandwich and fix the end of the fourth brace 51, which is made of a square steel pipe with a side length of 80 mm and a thickness of 2.3 mm, to the plate mounting surface 57 of the third steel column 13. The dimension of side (I) 118 is approximately 70 mm, the dimension of side (J) 119 is approximately 110 mm, the dimension of side (K) 120 is approximately 70 mm, and the dimension of steel column mounting portion 121 is approximately 110 mm. The plate mounting surface 57 is shown welded to the steel column mounting surface 57.

[0029] 6d shows the fourth steel column 14 in dotted lines and the brace fixing upper plate 53 welded to the plate mounting surface 55 at a quarter position from the top end of the fourth steel column 14 in solid lines. The brace fixing upper plate 53 is two rectangular plates with a thickness of 6 mm formed in the same shape to sandwich the ends of the first brace 48 and the second brace 49 formed from square steel pipes with a side length of 80 mm and a thickness of 2.3 mm and fix them to the plate mounting surface 55 of the fourth steel column 14. The dimensions of the side (M) 122 are approximately 70 mm, the dimensions of the side (P) 125 are approximately 230 mm, the dimensions of the side (O) 124 are approximately 70 mm, and the dimensions of the steel column mounting part 123 are approximately 230 mm. The state shown is that the upper and lower central parts of the steel column mounting part 123 are abutted and welded to the quarter position from the top end of the plate mounting surface 55.

[0030] 6e shows the fourth steel column 14 in dotted lines and the brace fixing lower plate 54 welded to the plate mounting surface 55 at a quarter position from the bottom end of the fourth steel column 14 in solid lines. The brace fixing lower plate 54 is two rectangular plates with a thickness of 6 mm formed in the same shape to sandwich the ends of the third brace 50 and the fourth brace 51 formed from square steel pipes with a side length of 80 mm and a thickness of 2.3 mm and fix them to the fourth steel column 14. The dimensions of the side (Q) 126 are approximately 70 mm, the dimensions of the side (T) 129 are approximately 230 mm, the dimensions of the side (S) 128 are approximately 70 mm, and the dimensions of the steel column mounting part 127 are approximately 230 mm. The state shown is that the upper and lower central parts of the steel column mounting part 127 are abutted and welded to the plate mounting surface 55 at a quarter position from the bottom end.

[0031] Figure 7 shows a front view of the earthquake-resistant M-shaped frame 5 for the first floor of a steel frame structure described in Figure 4, and also shows, in enlarged views of Figures 7a to 7e, the upper end plate 45 for brace fixing attached to the plate mounting surface 57 of the third steel column 13, the upper and lower central plates 46 for brace fixing, the first brace 48, the second brace 49, the third brace 50, and the fourth brace 51 welded to the lower end plate 47 for brace fixing, as well as the upper plate 53 for brace fixing attached to the plate mounting surface 55 of the fourth steel column 14, and the first brace 48, the second brace 49, the third brace 50, and the fourth brace 51 welded to the lower plate 54 for brace fixing.

[0032] 7a shows, by dotted lines, the state in which the end of the first brace 48 is sandwiched and fixed between two brace fixing upper end plates 45 formed in the same shape. The overlap width (A) 140 is the overlapping portion for abutting the side (BB) 181 (shown in FIG. 8) of the first brace 48 against the side (A) 110 (shown in FIG. 6) of the brace fixing upper end plate 45 for welding, and the overlap width (A) 140 is about 12 mm. Similarly, the overlap width (B) 141 is the overlapping portion for sandwiching the first brace 48 between the two brace fixing upper end plates 45 for welding, and the dimension of the overlap width (B) 141 shown by dotted lines is about 58 mm.

[0033] Figure 7b shows with dotted lines the state in which the ends of the second brace 49 and the third brace 50 are sandwiched and fixed between two upper and lower central plates 46 for fixing the brace, which are formed to the same shape. The overlap width (C) 142 is the overlapping portion where side (FF) 185 (shown in Figure 8) of the second brace 49 is positioned so as to contact the tip where side (E) 114 and side (F) 115 explained in Figure 6b intersect, and is sandwiched between the two upper and lower central plates 46 for fixing the brace, which are formed to the same shape, and welded together, and the dimension of the overlap width (C) 142 shown by the dotted line is approximately 61 mm. Similarly, overlap width (D) 143 is the overlapping portion where side (GG) 186 (shown in FIG. 8) of the second brace 49 is sandwiched between the two brace fixing upper and lower central plates 46 and welded together, and the dimension of overlap width (D) 143 shown by dotted lines is approximately 12 mm. Furthermore, overlap width (E) 144 is the overlapping portion where side (JJ) 189 (shown in FIG. 8) of the third brace 50 is sandwiched between the two brace fixing upper and lower central plates 46 and welded together, and the dimension of overlap width (E) 144 shown by dotted lines is approximately 12 mm. Similarly, overlap width (F) 145 is positioned so that side (KK) 190 (shown in Figure 8) of third brace 50 contacts the tip where side (F) 115 and side (G) 116 described in Figure 6b intersect, and is the overlapping portion to be sandwiched and welded together between two upper and lower central plates 46 for fixing the brace which are formed to the same shape, and the dimension of overlap width (F) 145 shown by a dotted line is approximately 61 mm.

[0034] FIG. 7c shows the state in which the end of the fourth brace 51 is sandwiched and fixed between two brace fixing lower end plates 47 formed in the same shape by dotted lines. In order to sandwich and weld the end of the fourth brace 51 between the two brace fixing lower end plates 47, the side (NN) 193 (shown in FIG. 8) of the fourth brace 51 is arranged so as to contact the tip where the side (I) 118 and the side (J) 119 described in FIG. 6c intersect. The dimension of the overlap width (G) 146 shown by dotted lines between the brace fixing lower end plate 47 and the fourth brace 51 is approximately 62 mm. Similarly, the overlap width (H) 147 is the overlapping portion in order to sandwich and weld the fourth brace 51 between the two brace fixing lower end plates 47, and the dimension of the overlap width (H) 147 shown by dotted lines is approximately 12 mm.

[0035] FIG. 7d shows by dotted lines the state in which the ends of the first brace 48 and the second brace 49 are sandwiched and fixed between two brace fixing upper plates 53 formed in the same shape. The overlap width (I) 148 is the overlapping portion in order to sandwich and weld the edge (BB) 181 (shown in FIG. 8) of the first brace 48 between the two brace fixing upper plates 53 formed in the same shape so that the edge (M) 112 and the edge (P) 125 described in FIG. 6d intersect, and the overlap width (I) 148 shown by dotted lines is about 58 mm. Similarly, the overlap width (J) 149 is the overlapping portion in order to sandwich and weld the edge (CC) 182 (shown in FIG. 8) of the first brace 48 between the two brace fixing upper plates 53, and the overlap width (J) 149 shown by dotted lines is about 12 mm. Furthermore, overlap width (K) 150 is the overlapping portion where side (FF) 185 (shown in FIG. 8) of second brace 49 is sandwiched between two brace fixing upper plates 53 and welded to be joined, and the dimension of overlap width (K) 150 shown by dotted lines is approximately 12 mm. Similarly, overlap width (L) 151 is the overlapping portion where side (GG) 186 (shown in FIG. 8) of second brace 49 is arranged to contact the tip where side (P) 125 and side (O) 124 explained in FIG. 6d intersect, and where two brace fixing upper plates 53 formed in the same shape are sandwiched and welded to be joined, and the dimension of overlap width (L) 151 is approximately 61 mm.

[0036] Figure 7e shows with dotted lines the state in which the ends of the third brace 50 and the fourth brace 51 are sandwiched and fixed between two brace fixing lower plates 54 formed in the same shape. The overlap width (M) 152 is the overlapping portion where side (JJ) 189 (shown in Figure 8) of the third brace 50 is positioned so as to contact the tip end where side (Q) 126 and side (T) 129 explained in Figure 6e intersect, and is sandwiched and welded together between the two brace fixing lower plates 54 formed in the same shape, and the dimension of overlap width (M) 152 shown by dotted lines is approximately 61 mm. Similarly, overlap width (N) 153 is the overlapping portion where side (KK) 190 (shown in FIG. 8) of the third brace 50 is sandwiched between two brace fixing lower plates 54 and welded together, and the dimension of overlap width (N) 153 shown by dotted lines is approximately 12 mm. Furthermore, overlap width (O) 154 is the overlapping portion where side (NN) 193 (shown in FIG. 8) of the fourth brace 51 is sandwiched between two brace fixing lower plates 54 and welded together, and the dimension of overlap width (O) 154 shown by dotted lines is approximately 12 mm. Similarly, overlap width (P) 155 is positioned so that side (OO) 194 (shown in Figure 8) of fourth brace 51 contacts the tip where side (T) 129 and side (S) 128 described in Figure 6e intersect, and is the overlapping portion that is sandwiched between two brace fixing lower plates 54 formed to the same shape and welded together, and the dimension of overlap width (P) 155 shown by a dotted line is approximately 62 mm.

[0037] Furthermore, welds (A) 156, (B) 158, (C) 165, (D) 160, (E) 163, (F) 166, (G) 169, and (H) 171 in Figure 7 show the positions where the first brace 48, the second brace 49, the third brace 50, and the fourth brace 51 are fixed by welding to the two brace fixing upper end plates 45, the upper and lower central plates 46 for brace fixing, the lower end plate 47 for brace fixing, the upper plate 53 for brace fixing, and the lower plate 54 for brace fixing.

[0038] 8 is a front view showing the disassembled state of the third steel column 13, the fourth steel column 14, the brace fixing upper end plate 45, the brace fixing upper and lower central plate 46, the brace fixing lower end plate 47, the brace fixing upper plate 53, the brace fixing lower plate 54, the first brace 48, the second brace 49, the third brace 50, the fourth brace 51, and the lower beam frame 52 of the earthquake-resistant M-shaped frame 5 for the first floor of the steel frame structure explained in FIG. 7. The first brace 48 is formed from a square steel pipe with a side of about 80 mm, a thickness of 2.3 mm, and a length of about 718 mm, and both ends are welded to the brace fixing upper end plate 45 and the brace fixing upper plate 53 at an angle of about 30.2 degrees with respect to the horizontal direction as shown by angle N. Similarly, the second brace 49 is formed from a square steel pipe with a side length of approximately 80 mm, a thickness of 2.3 mm, and a length of approximately 731 mm, and both ends are welded to the brace fixing upper plate 53 and the brace fixing upper and lower center plates 46 at an angle of approximately 31.7 degrees with respect to the horizontal as shown by angle O. Similarly, the third brace 50 is formed from a square steel pipe with a side length of approximately 80 mm, a thickness of 2.3 mm, and a length of approximately 731 mm, and both ends are welded to the brace fixing upper and lower center plates 46 and the brace fixing lower plate 54 at an angle of approximately 31.7 degrees with respect to the horizontal as shown by angle P. Similarly, the fourth brace 51 is formed from a square steel pipe with a side length of approximately 80 mm, a wall thickness of 2.3 mm, and a length of approximately 735 mm, and both ends are welded to the brace fixing lower plate 54 and the brace fixing lower end plate 47 at an angle of approximately 32.1 degrees to the horizontal, as shown by angle Q.

[0039] 9 is a perspective view of the earthquake-resistant M-shaped frame 4 for the second floor of a steel frame structure, the girders 6, 7, 11, and 12, which are described in FIG. 1. The earthquake-resistant M-shaped frame 4 for the second floor of a steel frame structure is composed of a first steel column 8 and a second steel column 9, each of which is made of two square steel pipes, each of which is 100 mm on a side and 4.5 mm thick, arranged in parallel at intervals of 700 mm, two upper end plates 210 for fixing braces, each of which is made of a flat steel plate having a trapezoidal shape of the same shape and welded to the upper end of the plate mounting surface 222 on the center line of the first steel column 8, two upper and lower center plates 211 for fixing braces, each of which is made of a flat steel plate having a rectangular shape of the same shape and welded to the upper and lower center parts on the center line of the plate mounting surface 222, and further The plate mounting surface 222 is welded to the lower end of the plate mounting surface 222, and the plate mounting surface 222 is welded to the lower end of the plate mounting surface 222. The ... The brace fixing upper end plate 210, the brace fixing upper and lower center plates 211, and the brace fixing lower end plate 212 are welded to the plate mounting surface 222 of the first steel column 8, and the brace fixing upper plate 213 and the brace fixing lower plate 214 are welded to the plate mounting surface 219 of the second steel column 9 located opposite to each other. The first brace 215, the second brace 216, the third brace 217, and the fourth brace 218 are attached to the brace fixing upper end plate 210, the brace fixing upper and lower center plates 211, and the brace fixing lower end plate 212, which are welded to the plate mounting surface 219 of the second steel column 9 located opposite to each other. The end of the beam fixing plate (A) 223 is welded to the top of the second steel column 9. The top of the first steel column 8 is welded to an upper end plate 226 made of a square flat steel plate measuring 100 mm in length, 100 mm in width and 9 mm in thickness. The top of the second steel column 9 is welded to an upper end plate 226 made of a rectangular flat steel plate measuring 100 mm in length, 270 mm in width and 9 mm in thickness. The top surfaces of the upper end plate 226 and the beam fixing plate (A) 223 thus constructed are fitted with a metal plate measuring 200 mm in height, 100 mm in side length, 8 mm in flange thickness and 5 mm in web thickness.Two 5 mm identical H-shaped steel beams are fixed at right angles to each other in an L-shape using two splice plates 208, bolts 209, and nuts (not shown). The lower flange (A) 233 of the girder 6 and the lower flange (B) 237 of the girder 7 are placed on the girder 6 and fixed with bolts 235 and 246. The lower end plate 228 is made of a square flat steel plate measuring approximately 100 mm in length, 100 mm in width, and 9 mm in thickness and is welded to the lower end of the first steel column 8. Furthermore, a beam fixing plate (B) 221 formed from a rectangular flat steel plate measuring approximately 100 mm in length, 270 mm in width, and 9 mm in thickness is welded to the lower end of the second steel column 9, and the lower end plate 228 thus constructed and the upper flange (A) 263 of the main girder 11 and the upper flange (B) 264 of the main girder 12, which are fixed at right angles in an L-shape to the underside of the beam fixing plate (B) 221, are fixed with bolts 256 (shown in Figure 11) and bolts 220.

[0040] Fig. 10 is a perspective view showing the state of the second-story M-shaped earthquake-resistant steel frame 4 explained in Fig. 9, without the girders 6 and 7 attached to the top and the girders 11 and 12 attached to the bottom. By assembling the second-story M-shaped earthquake-resistant steel frame 4 configured in this way in the factory using jigs, it has become possible to build a steel structure with improved assembly precision.

[0041] Fig. 11 shows an exploded view of the earthquake-resistant M-shaped frame 4 for the second floor of a steel frame structure described in Fig. 9. The frame 4 is made of a square steel pipe with a side length of 100 mm, a thickness of 4.5 mm, and a length of approximately 2257 mm. The frame 4 is made of a square steel plate with a side length of 100 mm and a thickness of 9 mm, and has four bolt holes 225 formed at approximately the four corners of the square steel plate. The four bolt holes 225 formed in the upper end plate 226 are welded to the steel column mounting surface (A) 241 of the four bolt holes 225 formed in the upper end plate 226. The upper end plate 226 is made of a square steel pipe with a side length of 100 mm, a thickness of 4.5 mm, and a length of approximately 2257 mm. The upper end plate 226 is made of a square steel plate with a side length of 100 mm and a thickness of 9 mm, and has four bolt holes 225 formed at approximately the four corners of the square steel plate. The four bolt holes 225 are welded to the steel column mounting surface (A) 241 of the four bolt holes 225 formed in the upper end plate 226. The upper end plate 226 is made of a square steel pipe with a side length of 100 mm, a thickness of 4.5 mm, and a length of approximately 2257 mm. Two brace fixing upper end plates 210 formed in the same shape to be welded to the upper and lower central parts on the center line of the plate mounting surface 222 of the first steel column 8, two brace fixing lower end plates 212 formed in the same shape to be welded to the lower end part on the center line of the plate mounting surface 222 of the first steel column 8, and a square plate 213 with one side of about 100 mm and a thickness of 9 mm to be welded to the steel column lower end (A) 253 of the first steel column 8. a lower end plate 228 having four bolt holes 252 formed at approximately the four corners of the flat steel plate; four beam fixing nuts 250 welded to the steel column mounting surface (C) 251 of the four bolt holes 252 formed in the lower end plate 228; and a beam fixing plate (A) 223 having four bolt holes 227 formed at approximately the four corners of a rectangular flat steel plate about 100 mm long, about 270 mm wide, and 9 mm thick, for welding to the steel column upper end (B) 249 of the second steel column 9. The brace fixing upper plates 213 are formed in the same shape for welding to a position one-quarter of the way from the top end of the second steel column 9, two brace fixing lower plates 214 are formed in the same shape for welding to a position one-quarter of the way from the bottom end on the center line of the plate mounting surface 219 of the second steel column 9, and a beam fixing plate (B) 221 which is a rectangular flat steel plate approximately 100 mm in length, 270 mm in width and 9 mm in thickness and has four bolt holes 229 formed in approximately the four corners for welding to the steel column lower end (B) 257 of the second steel column 9.

[0042] 11 further shows four bolt holes 238 formed at positions of the girder lower flange (A) 233 facing the four bolt holes 225 formed in the upper end plate 226 in order to fix the first steel column 8, to which the upper end plate 226 is welded, to the girder lower flange (A) 233 of the girder 6, and also shows bolts 235 and beam fixing nuts 243 for attaching the girder lower flange (A) 233 of the girder 6 to the first steel column 8. Similarly, four bolt holes 245 are formed at positions of the girder lower flange (B) 237 of the girder 7 facing the four bolt holes 227 formed in the beam fixing plate (A) 223 of the second steel column 9, and also shows four bolts 246 and nuts 247 for attaching the girder 7 to the second steel column 9. Furthermore, as explained in Figure 9, in order to fix the first steel column 8 to which the lower end plate 228 is welded, and the second steel column 9 to which the beam fixing plate (B) 221 is welded, to the upper flange (A) 263 of the main girder 11 and the upper flange (B) 264 of the main girder 12, four bolt holes 255 are formed at the positions of the upper flange (A) 263 of the main girder opposite to the four bolt holes 252 formed in the lower end plate 228, and bolts 256 and beam fixing nuts 250 for fixing the main girder 11 to the lower end plate 228 welded to the steel column lower end (A) 253 of the first steel column 8 are also shown. Similarly, four bolt holes 261 are formed at positions on the upper flange (B) 264 of the main girder that correspond to the four bolt holes 229 formed in the beam fixing plate (B) 221, and bolts 220 and nuts 262 are shown for fixing the main girder 12 to the beam fixing plate (B) 221 welded to the lower end portion (B) 257 of the second steel column 9.

[0043] Figure 12 shows a front view of the earthquake-resistant M-shaped frame 4 for the second floor of a steel frame structure described in Figure 9, and also shows in enlarged views the upper end plate 210 for fixing the brace, the upper and lower central plates 211 for fixing the brace, and the lower end plate 212 for fixing the brace welded to the plate mounting surface 222 of the first steel column 8 in Figures 12a to 12e, as well as the upper plate 213 for fixing the brace and the lower plate 214 for fixing the brace welded to the plate mounting surface 219 of the second steel column 9.

[0044] 12a shows the first steel column 8 in dotted lines, and the brace fixing upper end plate 210 welded to the plate mounting surface 222 at the upper end of the first steel column 8 in solid lines. The brace fixing upper end plate 210 is two identical trapezoidal plates with a thickness of 6 mm for sandwiching and fixing the end of the first brace 215 formed from a square steel pipe with a side length of 80 mm and a thickness of 2.3 mm to the first steel column 8. The plate is disposed so that the tip where the side (A) 270 and the steel column mounting part 273 intersect is in contact with the upper end of the plate mounting surface 222, and the steel mounting part 273 is welded to the plate mounting surface 222. The dimension of side (A) 270 of the upper end plate 210 for fixing the brace is approximately 86 mm, the dimension of side (B) 271 is approximately 90 mm, the angle S at which side (A) 270 and side (B) 271 intersect is approximately 239.8 degrees, the dimension of side (C) 272 is approximately 70 mm, the angle at which side (B) 271 and side (C) 272 intersect is 90 degrees, the dimension of the steel column mounting portion 273 is approximately 140 mm, the angle at which the steel column mounting portion 273 intersects with side (C) 272 is 90 degrees, and the angle R at which the steel column mounting portion 273 intersects with side (A) 270 is approximately 300.2 degrees.

[0045] 12b shows the first steel column 8 in dotted lines and the brace fixing upper and lower central plates 211 welded to the plate mounting surface 222 in the upper and lower central parts of the first steel column 8 in solid lines. The brace fixing upper and lower central plates 211 are two rectangular plates with a thickness of 6 mm and the same shape to sandwich and fix the ends of the second brace 216 and the third brace 217 formed from square steel pipes with a side length of 80 mm and a thickness of 2.3 mm to the first steel column 8. The dimensions of the side (E) 274 are approximately 70 mm, the dimensions of the side (F) 275 are approximately 230 mm, the dimensions of the side (G) 276 are approximately 70 mm, and the dimensions of the steel column mounting part 277 are approximately 230 mm. The state shown is that the upper and lower central parts of the steel column mounting part 277 are abutted against the upper and lower central parts of the plate mounting surface 222 and welded to the plate mounting surface 222.

[0046] 12c shows the first steel column 8 in dotted lines and the brace fixing lower end plate 212 welded to the plate mounting surface 222 at the lower end of the first steel column 8 in solid lines. The brace fixing lower end plate 212 is two identical trapezoidal plates with a thickness of 6 mm for sandwiching the end of the fourth brace 218 formed from a square steel pipe with a side length of 80 mm and a thickness of 2.3 mm to fix it to the first steel column 8. The plate is disposed so that the tip where the side (K) 280 and the steel column mounting part 281 intersect is in contact with the lower end of the plate mounting surface 222, and the steel mounting part 281 is welded to the plate mounting surface 222. The dimension of side (I) 278 of the lower end plate 212 for fixing the brace is approximately 70 mm, the dimension of side (J) 279 is approximately 90 mm, the angle where side (I) 278 and side (J) 279 intersect is 90 degrees, the dimension of side (K) 280 is approximately 86 mm, the angle U where side (K) 280 and side (J) 279 intersect is approximately 235 degrees, the angle T where steel column mounting portion 281 and side (K) 280 intersect is approximately 305.5 degrees, and the dimension of steel column mounting portion 281 is approximately 140 mm.

[0047] 12d shows the second steel column 9 in dotted lines and the brace fixing upper plate 213 welded to the plate mounting surface 219 at a quarter from the top of the second steel column 9 in solid lines. The brace fixing upper plate 213 is two rectangular plates with a thickness of 6 mm and the same shape to sandwich the ends of the first brace 215 and the second brace 216 formed from square steel pipes with a side length of 80 mm and a thickness of 2.3 mm and fix them to the second steel column 9. The dimensions of the side (M) 282 are approximately 70 mm, the dimensions of the side (P) 285 are approximately 230 mm, the dimensions of the side (O) 284 are approximately 70 mm, and the dimensions of the steel column mounting part 283 are approximately 230 mm. The state shown is that the upper and lower central parts of the steel column mounting part 283 are abutted and welded to the quarter position from the top of the plate mounting surface 219.

[0048] 12e shows the second steel column 9 in dotted lines and the brace fixing lower plate 214 welded to the plate mounting surface 219 at a quarter from the lower end of the second steel column 9 in solid lines. The brace fixing lower plate 214 is two identical rectangular plates with a thickness of 6 mm for sandwiching the ends of the third brace 217 and the fourth brace 218 formed from square steel pipes with a side length of 80 mm and a thickness of 2.3 mm to fix them to the second steel column 9. The dimensions of the side (Q) 286 are approximately 70 mm, the dimensions of the side (T) 289 are approximately 230 mm, the dimensions of the side (S) 288 are approximately 70 mm, and the dimensions of the steel column mounting part 287 are approximately 230 mm. The state shown is that the upper and lower central parts of the steel column mounting part 287 are abutted and welded to the quarter position from the lower end of the plate mounting surface 219.

[0049] Figure 13 shows a front view of the earthquake-resistant M-shaped frame 4 for the first floor of a steel frame structure described in Figure 10, and also shows in Figures 13a to 13e enlarged views of the first brace 215, second brace 216, third brace 217, and fourth brace 218 welded to the upper end plate 210 for brace fixing, the upper and lower central plates 211 for brace fixing, and the lower end plate 212 for brace fixing, which are welded to the plate mounting surface 222 of the first steel column 8, as well as the upper plate 213 for brace fixing welded to the plate mounting surface 219 of the second steel column 9, and the first brace 215, second brace 216, third brace 217, and fourth brace 218 welded to the lower plate 214 for brace fixing.

[0050] 13a shows, in dotted lines, the state in which the end of the first brace 215 is sandwiched between two brace fixing upper end plates 210 formed in the same shape. The overlap width (A) 300 is the overlapping portion for abutting the side (BB) 341 (shown in FIG. 14) of the first brace 215 with the side (A) 270 (shown in FIG. 12) of the brace fixing upper end plate 210 so as to overlap and weld together, and the dimension of the overlap width (A) 300 is about 12 mm. Similarly, the overlap width (B) 301 is the overlapping portion for sandwiching the first brace 215 between the two brace fixing upper end plates 210 and welding together, and the dimension of the overlap width (B) 301 shown in dotted lines is about 55 mm.

[0051] Figure 13b shows by dotted lines the state in which the ends of the second brace 216 and the third brace 217 are sandwiched and fixed between two upper and lower central plates 211 for fixing the brace, which are formed in the same shape. The overlap width (C) 302 is the overlapping portion where the side (FF) 345 (shown in Figure 14) of the second brace 216 is arranged to contact the tip where the side (E) 274 and the side (F) 275 explained in Figure 12b intersect, and the two upper and lower central plates 211 for fixing the brace, which are formed in the same shape, are sandwiched and welded together, and the dimension of the overlap width (C) 302 shown by the dotted line is approximately 74 mm. Similarly, overlap width (D) 303 is the overlapping portion where side (GG) 346 (shown in FIG. 14) of second brace 216 is sandwiched between two brace fixing upper and lower central plates 211 and welded to each other, and the dimension of overlap width (D) 303 shown by dotted lines is approximately 13 mm. Furthermore, overlap width (E) 304 is the overlapping portion where side (JJ) 349 (shown in FIG. 14) of third brace 217 is sandwiched between two brace fixing upper and lower central plates 211 and welded to each other, and the dimension of overlap width (E) 304 shown by dotted lines is approximately 13 mm. Similarly, overlap width (F) 305 is the overlapping portion that is positioned so that side (KK) 350 (shown in Figure 14) of third brace 217 contacts the tip where side (F) 275 and side (G) 276 described in Figure 12b intersect, and is sandwiched between two upper and lower central plates 211 for fixing the brace that are formed to the same shape, and welded together, and the dimension of overlap width (F) 305 shown by a dotted line is approximately 75 mm.

[0052] 13c shows by dotted lines the state in which the end of the fourth brace 218 is sandwiched between two brace fixing lower end plates 212 formed in the same shape. The overlapping portion is for sandwiching the end of the fourth brace 218 between the two brace fixing lower end plates 212 and welding it together, and the overlapping width (G) 306 is for sandwiching the side (NN) 353 (shown in FIG. 14) of the fourth brace 218 between the two brace fixing lower end plates 212 and welding it together, and the dimension of overlapping width (G) 306 shown by dotted lines is approximately 55 mm. Similarly, overlap width (H) 307 is the overlapping portion where edge (OO) 354 (shown in Figure 14) of the fourth brace 218 is abutted so as to overlap with edge (K) 280 (shown in Figure 12) of the brace fixing lower end plate 212 and welded to each other, and the dimension of overlap width (H) 307 is approximately 12 mm.

[0053] Figure 13d shows with dotted lines the state in which the ends of the first brace 215 and the second brace 216 are sandwiched and attached between two brace fixing upper plates 213 formed in the same shape. Overlap width (I) 308 is the overlapping portion where side (BB) 341 (shown in Figure 14) of the first brace 215 is positioned so as to contact the tip where side (M) 282 and side (P) 285 explained in Figure 12d intersect, and is sandwiched between the two brace fixing upper plates 213 formed in the same shape and welded together, and overlap width (I) 308 shown by dotted lines is approximately 69 mm. Similarly, overlap width (J) 309 is the overlapping portion for sandwiching side (CC) 342 (shown in FIG. 14) of first brace 215 between two brace fixing upper plates 213 and welding them together, and overlap width (J) 309 shown by dotted lines is approximately 12 mm. Furthermore, overlap width (K) 310 is the overlapping portion for sandwiching side (FF) 345 (shown in FIG. 14) of second brace 216 between two brace fixing upper plates 213 and welding them together, and overlap width (K) 310 shown by dotted lines is approximately 13 mm. Similarly, overlap width (L) 311 is the overlapping portion that is positioned so that side (GG) 346 (shown in Figure 14) of second brace 216 contacts the tip where side (P) 285 and side (O) 284 described in Figure 12d intersect, and is sandwiched between two upper brace fixing plates 213 formed in the same shape and welded to join, and overlap width (L) 311 shown by dotted lines is approximately 75 mm.

[0054] FIG. 13e shows by dotted lines the state in which the ends of the third brace 217 and the fourth brace 218 are sandwiched between two brace fixing lower plates 214 formed in the same shape. The overlap width (M) 312 is the overlapping portion for sandwiching and welding the edge (JJ) 349 (shown in FIG. 14) of the third brace 217 between the ends of the edges (Q) 286 and (T) 289 described in FIG. 12e and sandwiching the edge (JJ) 349 (shown in FIG. 14) between the two brace fixing lower plates 214 formed in the same shape, and is approximately 75 mm. Similarly, the overlap width (N) 313 is the overlapping portion for sandwiching and welding the edge (KK) 350 (shown in FIG. 14) of the third brace 217 between the two brace fixing lower plates 214, and is approximately 13 mm. Furthermore, overlap width (O) 314 is the overlapping portion where side (NN) 353 (shown in FIG. 14) of the fourth brace 218 is sandwiched between two brace fixing lower plates 214 for welding, and overlap width (O) 314 shown by dotted lines is approximately 12 mm. Similarly, overlap width (P) 315 is the overlapping portion where side (OO) 354 (shown in FIG. 14) of the fourth brace 218 is arranged to contact the tip where side (S) 288 and side (T) 289 described in FIG. 12e intersect, and where two brace fixing lower plates 214 formed in the same shape are sandwiched between and welded, and overlap width (P) 315 shown by dotted lines is approximately 69 mm.

[0055] Furthermore, weld (A) 316, weld (B) 318, weld (C) 321, weld (D) 322, weld (E) 325, weld (F) 326, weld (G) 329, and weld (H) 331 in Figure 13 indicate the positions at which the first brace 215, second brace 216, third brace 217, and fourth brace 218 are welded to the two brace fixing upper end plates 210, upper and lower central plates 211 for brace fixing, lower end plate 212 for brace fixing, upper plate 213 for brace fixing, and lower plate 214 for brace fixing.

[0056] Fig. 14 is a front view showing the first steel column 8, the second steel column 9, the brace fixing upper end plate 210, the brace fixing upper and lower central plate 211, the brace fixing lower end plate 212, the brace fixing upper plate 213, the brace fixing lower plate 214, the first brace 215, the second brace 216, the third brace 217, and the fourth brace 218 of the earthquake-resistant M-shaped frame 4 for the second floor of the steel frame structure described in Fig. 13, disassembled. The first brace 215 is formed from a square steel pipe with one side of 80 mm, a thickness of 2.3 mm, and a length of about 769 mm, and both ends are welded to the brace fixing upper end plate 210 and the brace fixing upper plate 213 at an angle of about 35.5 degrees with respect to the horizontal direction, as shown by angle V. Similarly, the second brace 216 is formed from a square steel pipe with a side length of 80 mm, a thickness of 2.3 mm, and a length of approximately 797 mm, and both ends are welded to the brace fixing upper plate 213 and the brace fixing upper and lower center plates 211 at an angle of approximately 37.9 degrees with respect to the horizontal as indicated by angle W. Similarly, the third brace 217 is formed from a square steel pipe with a side length of 80 mm, a thickness of 2.3 mm, and a length of approximately 797 mm, and both ends are welded to the brace fixing upper and lower center plates 211 and the brace fixing lower plate 214 at an angle of approximately 37.9 degrees with respect to the horizontal as indicated by angle X. Similarly, the fourth plate 218 is formed from a square steel pipe with a side length of 80 mm, a wall thickness of 2.3 mm, and a length of approximately 769 mm, and both ends are welded to the brace fixing lower plate 214 and the brace fixing lower end plate 212 at an angle of approximately 35.5 degrees to the horizontal, as shown by angle Y.

[0057] Figure 15 shows a method of constructing a ceiling foundation to be applied to the underside of the second floor slab 20 described in Figure 1. Figure 15b shows an exploded view of the state before the joist 361 and ceiling material 364 formed from square timber are attached to the deck plate 363, and Figure 15a shows a perspective view of the state in which the joist 361 is fixed to the underside of the peak 366 of the deck plate 363 described in Figure 15b with joist screw nails 368, and the ceiling material 364 is fixed to the underside of the joist 361 with ceiling material screw nails 365.

[0058] FIG. 15b shows a state where two sets of deck plates 363 of the same shape are arranged side by side and overlapped with each other at the joints (shown as joints (A) 390 and joints (B) 395 in FIG. 17b) formed at the ends of each other, and further shows a state where a plurality of joint screw holes 368 for fixing the rafter 361 to the underside of the crest 366 of the deck plate 363 are formed on the approximate center line of the crest 366 of the deck plate 363. The exploded view shows 69, a joist 361 formed from a square timber measuring approximately 65 mm in length and 50 mm in width for fixing onto the center line of the underside of the peak portion 366 of the deck plate 363, a flat ceiling material 364 for fixing to the underside of the joist 361, a plurality of ceiling material screw nail holes 372 drilled in the ceiling material 364 for fixing the ceiling material 364 to the joist 361, and further a ceiling material screw nail 365 for attaching the ceiling material 364 to the joist 361. Furthermore, by using a joist 361 made from square timber with a vertical dimension of approximately 65 mm, which is obtained by adding 15 mm to the deck height dimension Ll (shown in Figure 17a) of the deck plate 363, the lower part of the joist 361 protrudes below the valley portion 367 of the deck plate 363, which prevents the ceiling material 364 from coming into contact with the underside of the valley portion 367 of the deck plate 363 when the ceiling material 364 is attached to the underside of the joist 361. It also makes it possible to wire an F cable for lighting fixtures, etc., in the gap of approximately 15 mm between the underside of the valley portion 367 of the deck plate 363 and the ceiling material 364.

[0059] Fig. 15a shows a state in which a joist 361 is placed on the underside of the peak 366 of the deck plate 363 described in Fig. 15b, and the peak 366 of the deck plate 363 and the joist 361 are fixed from the upper side of the peak 361 of the deck plate 363 with a joist screw nail 368, and a ceiling material 364 is fixed to the underside of the joist 361 fixed to the deck plate 363 with a ceiling material screw nail 368. By fixing the joist 361 to the underside of the peak 366 of the deck plate 363 in this way, it is possible to reduce the height of the ceiling base, and therefore to make the ceiling in the room higher.

[0060] FIG. 16 shows a cross-sectional view of the second floor slab 20 described in FIG. 1. The third floor slab 19 and the fourth floor slab 18 have the same shape as the second floor slab 20. FIG. 16b shows a cross-sectional view of the second floor slab 20 in an exploded state. The exploded cross-sectional view shows a deck plate 363 welded to the upper flange of the girder 12, a joist 361 formed from square timber to be attached to the underside of the crest 366 of the deck plate 363, a joist screw nail 368 for fixing the joist 361 to the underside of the crest 366 of the deck plate 363, a ceiling material 364 for attaching to the underside of the joist 361, and a ceiling material screw nail 365 for fixing the ceiling material 364 to the underside of the joist 361.

[0061] Fig. 16a shows the state in which the joist 361 is fixed to the underside of the crest 366 of the deck plate 363 described in Fig. 16b on the approximate center line with a joist screw 368, the ceiling material 364 is fixed to the underside of the joist 361 fixed to the deck plate 363 with a ceiling material screw 365, and concrete 362 is poured on the upper side of the deck plate 363 to form the floor slab 20. Fig. 16a further shows the details of the dimension F (approximately 168 mm, which is the total dimension of the floor slab 20 and the ceiling substrate) described in Fig. 2. The flooring 381 is a flooring material to be installed on the indoor floor of the floor slab 10, and is approximately 13 mm thick. The thickness of the concrete 362 applied to the second floor floor slab 20 (from the underside of the flooring 381 to the top surface of the crest 366 of the deck plate 363) is about 80 mm, the thickness of the joist 361 fixed to the underside of the crest 366 of the deck plate 363 is about 65 mm, and the thickness of the ceiling material 364 is about 10 mm. Therefore, the dimension value F (168 mm) described in FIG. 2 = the total thickness of the thickness of the flooring 381 (about 13 mm) + the thickness of the concrete 362 (about 80 mm) + the vertical dimension of the joist 361 (about 65 mm) + the thickness of the ceiling material 364 (about 10 mm). By configuring in this way, it is possible to omit the parts such as the hanging bolts and the joist support hanging hardware that were previously used to compose the ceiling base, and it is possible to increase the height of the room by the amount of the omission.

[0062] FIG. 17 shows a cross-sectional view of the deck plate 363 described in FIG. As shown in Figure 17a, the deck plate 363 is formed with a thickness of approximately 1.2 mm, an overall width dimension Aa of approximately 614 mm, an upper panel width dimension Bb of approximately 146.1 mm, a groove width dimension Cc of approximately 58.6 mm, an upper panel width dimension Dd of approximately 146.1 mm, a groove width dimension Ee of approximately 58.6 mm, an upper panel width dimension Ff of approximately 146.1 mm, a sleeve panel dimension Gg of approximately 19.2 mm, a lower panel width dimension Hh of approximately 38.6 mm, a ridge width dimension Ii of approximately 166.1 mm, a lower panel width dimension Jj of approximately 38.6 mm, a sleeve rise dimension Kk of approximately 15 mm, and a deck height dimension of approximately 50 mm, and further, as shown in Figure 17b, angles Mm, Nn, Oo, Pp, and Qq of the deck plate 363 are all approximately 258.7 degrees, and angle Rr of approximately 101.3 degrees.

[0063] The construction method for a 10m high, four-story steel frame structure according to the present invention has been explained in detail above based on the embodiment, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention and still fall within the technical scope of the present invention. [Brief description of the drawings]

[0064] [Figure 1] 1 is a front view of a steel frame structure for constructing a steel frame building according to an embodiment of the present invention; [Diagram 2] 2 is a front view showing the overall height and the interior height of the steel frame structure shown in FIG. 1 according to the embodiment. [Diagram 3] 2 is a perspective view showing an earthquake-resistant M-frame for the first floor of a steel frame structure according to the embodiment, which is installed on the first floor portion of the steel frame structure shown in FIG. 1. [Figure 4] 4 is a perspective view showing the state in which the girders and foundation concrete are removed from the earthquake-resistant M-shaped frame for the first floor of a steel frame structure shown in FIG. 3 according to the embodiment. [Diagram 5] 4 is an exploded view of the earthquake-resistant M-shaped frame for the first floor of a steel frame structure shown in FIG. 3 according to the embodiment. [Figure 6] 4 is a front view of the earthquake-resistant M-shaped frame for the first floor of a steel frame structure shown in FIG. 3 according to the embodiment. [Figure 7] FIG. 5 is a front view showing a state in which braces are welded to each plate of the earthquake-resistant M-shaped frame for the first floor of a steel frame structure shown in FIG. 4 according to the embodiment. [Figure 8] 8 is a front view showing the disassembled state of the plates and braces of the earthquake-resistant M-shaped frame for the first floor of a steel frame structure shown in FIG. 7 according to the embodiment. [Figure 9] 2 is a perspective view showing an earthquake-resistant M-frame for a first floor of a steel frame structure according to the embodiment, which is installed on a second floor portion of the steel frame structure shown in FIG. 1. FIG. [Figure 10] 10 is a perspective view of the second-story earthquake-resistant M-shaped steel frame shown in FIG. 9 with the girders and concrete foundation removed, according to the embodiment. [Figure 11] 10 is an exploded view of the earthquake-resistant M-shaped frame for the second floor of a steel frame structure shown in FIG. 9 according to the embodiment. [Figure 12] 10 is a front view of the earthquake-resistant M-shaped frame for a second floor steel frame structure shown in FIG. 9 according to the embodiment. [Figure 13] FIG. 5 is a front view showing a state in which braces are welded to each plate of the earthquake-resistant M-shaped frame for a second floor steel frame structure shown in FIG. 4 according to the embodiment. [Figure 14] FIG. 14 is a front view of the second-story earthquake-resistant M-shaped frame for steel frame construction shown in FIG. 13 with the plates and braces disassembled according to the embodiment. [Figure 15] 2 is an exploded view of the floor slabs and ceiling substrate of each floor shown in FIG. 1 according to the embodiment. [Figure 16] 16 is a cross-sectional view of the floor slabs and ceiling substrate of each floor shown in FIG. 15 according to this embodiment. [Figure 17] 17 is a cross-sectional view of the deck plate shown in FIG. 16 according to the same embodiment. [Explanation of symbols]

[0065] A Dimension Value B Dimension Value C Dimension Value D Dimension Value E dimension value F Dimensions G dimension value I Dimension Value J Dimension Value K Dimension Value L angle M angle N angle O Angle P angle Q Angle R angle S angle T angle U angle V angle W Angle X angle Y Angle Aa Overall width Bb Top panel width Cc Groove width dimension Dd Top panel width Ee Groove width dimension Ff Top panel width Gg Sleeve dimensions Hh Bottom plate width dimension Ii Mountain width dimension Jj Bottom plate width dimension Kk Sleeve rise dimension Ll Deck height dimension mm angle Nn angle Oo angle Pp angle Qq Angle Rr angle 1. Steel structure 2. Steel structure, earthquake-resistant M-shaped frame for 4th floor 3. Steel structure, earthquake-resistant M-shaped frame for 3rd floor 4. Steel structure, earthquake-resistant M-shaped frame for 2nd floor 5. Steel structure, earthquake-resistant M-shaped frame for first floor 6 girder 7 girder 8. First Steel Column 9 Second Steel Column 11 Large beam 12 Large beam 13 Third Steel Pillar 14 Fourth Steel Pillar 15 ALC wall panel 16 Anchor bolt 17 Foundation Concrete 18 4th floor floor slab 19 3rd floor slab 20 2nd floor slab 21 Field board 22 Asphalt Roofing 23 Beam 24 Beam 25 Large beam 26 Large beam 27 Steel structure, earthquake-resistant M-shaped frame for 4th floor 28 Steel structure, earthquake-resistant M-shaped frame for 3rd floor 29 Steel structure, earthquake-resistant M-shaped frame for 2nd floor 30 Steel structure, earthquake-resistant M-shaped frame for first floor 31 Foundation slab 32 Decorative slate roofing 40 Splice Plate 41 Volts 42 Volts 43 Volts 44 Beam fixing plate 45 Brace fixing upper end plate 46 Upper and lower central plates for fixing braces 47 Lower end plate for fixing brace 48 First Brace 49 Second Brace 50 Third Brace 51 Fourth Brace 52 Lower beam frame 53 Upper plate for fixing brace 54 Lower plate for fixing brace 55 Plate mounting surface 56 Nut 57 Plate mounting surface 61 Bolt Hole 62 Upper end plate 63 Bolt Hole 64 Stiffener(A) 65 Anchor bolt hole (A) 66 Anchor bolt hole (B) 67 Stiffener (B) 75 Lower flange of girder (A) 76 Web(A) 77 Bolt Hole 78 Beam end 79 Bolt Holes 80 Web(B) 81 Lower flange of girder (B) 82 Beam mounting surface (A) 83 Steel column mounting surface (A) 84 Steel column upper end (A) 85 Beam fixing nut 86 Beam mounting surface (B) 87 Nut 88 Steel column mounting surface (B) 89 Steel column top end (B) 90 Steel column bottom end (A) 91 Steel column mounting surface (A) 92 Steel column bottom end (B) 93 Steel column mounting surface (B) 94 Web(C) 110 Side(A) 111 Side(B) 112 Side(C) 113 Steel column attachment part 114th side(E) 115 Side(F) 116 Sides(G) 117 Steel column attachment part 118 Sides(I) 119 Side(J) 120 sides(K) 121 Steel column attachment part 122 sides(M) 123 Steel column attachment part 124 Sides(O) 125 sides(P) 126 Sides(Q) 127 Steel column attachment part 128 Sides(S) 129 Side(T) 140 overlap width (A) 141 overlap width (B) 142 overlap width(C) 143 overlap width (D) 144 overlap width(E) 145 overlap width(F) 146 overlap width (G) 147 overlap width (H) 148 overlap width(I) 149 overlap width (J) 150 overlap width (K) 151 Stack width (L) 152 overlap width (m) 153 Overlap width (N) 154 Overlap width (O) 155 overlap width (P) 156 Welding (A) 157 Intersection (A) 158 Welded Section(B) 159 Intersection (B) 160 Welding section(D) 161 Intersection (D) 162 Intersection (E) 163 Welding (E) 164 Intersection (C) 165 Welding (C) 166 Welding (F) 167 Intersection (F) 168 Intersection (G) 169 Welded section (G) 170 Intersection (H) 171 Welded part (H) 180 sides (AA) 181 Sides(BB) 182 sides(CC) 183 sides(DD) 184 sides(EE) 185 sides(FF) 186 sides(GG) 187 Sides(HH) 188 Sides(II) 189 side(JJ) 190 sides(KK) 191 sides(LL) 192 sides (MM) 193 sides(NN) 194 sides(OO) 195 sides(PP) 208 Splice Plate 209 Volts 210 Upper end plate for fixing brace 211 Upper and lower central plates for fixing braces 212 Lower end plate for fixing brace 213 Upper plate for fixing brace 214 Lower plate for fixing brace 215 First Brace 216 Second Brace 217 Third Brace 218 Fourth Brace 219 Plate mounting surface 220 Volts 221 Beam fixing plate (B) 222 Plate mounting surface 223 Beam fixing plate (A) 225 bolt holes 226 Upper end plate 227 Bolt Hole 228 Lower end plate 229 Bolt Hole 233 Lower flange of girder (A) 234 Web(A) 235 volts 236 Web(B) 237 Lower flange of girder (B) 238 Bolt Hole 239 Beam end 240 Beam mounting surface (A) 241 Steel column mounting surface (A) 242 Steel column top end (A) 243 Beam fixing nut 244 Beam mounting surface (B) 245 bolt holes 246 volts 247 Nut 248 Steel column mounting surface (B) 249 Steel column top end (B) 250 Beam fixing nut 251 Steel column mounting surface (C) 252 Bolt Hole 253 Steel column bottom end (A) 254 Beam mounting surface (A) 255 bolt holes 256 volts 257 Steel column bottom end (B) 258 Steel column mounting surface (D) 260 Beam mounting surface (B) 261 Bolt Hole 262 Nut 263 Upper flange of girder (A) 264 Upper flange of girder (B) 270 Side(A) 271 Sides(B) 272 Side(C) 273 Steel column attachment part 274 Sides(E) 275 sides(F) 276 sides(G) 277 Steel column attachment part 278 Sides(I) 279 sides(J) 280 sides(K) 281 Steel column attachment part 282 sides(M) 283 Steel column attachment part 284 Sides(O) 285 sides(P) 286 sides(Q) 287 Steel column attachment part 288 sides(S) 289 Sides(T) 300 overlap width (A) 301 overlap width (B) 302 overlap width(C) 303 overlap width (D) 304 overlap width (E) 305 overlap width (F) 306 overlap width (G) 307 Overlap width (H) 308 Overlap width(I) 309 overlap width (J) 310 overlap width (K) 311 Stack width (L) 312 overlap width (m) 313 Overlap width (N) 314 Overlap width (O) 315 overlap width (P) 316 Welding section (A) 317 Intersection (A) 318 Welding (B) 319 Intersection (B) 320 Intersection (C) 321 Welding (C) 322 Welding (D) 323 Intersection (D) 324 Intersection (E) 325 Welded Section(E) 326 Welding (F) 327 Intersection (F) 328 Intersection (G) 329 Welded Section(G) 330 Intersection (H) 331 Welded section (H) 340 sides(AA) 341 sides(BB) 342 sides(CC) 343 sides(DD) 344 sides(EE) 345 sides(FF) 346 sides(GG) 347 Sides(HH) 348 Sides(II) 349 side(JJ) 350 sides(KK) 351 sides(LL) 352 sides (MM) 353 sides(NN) 354 sides(OO) 355 sides(PP) 361 Rough edge 362 Concrete 363 Deck Plate 364 Ceiling material 365 Screw nails for ceiling materials 366 Yamabe 367 Valley 368 Screw nails for rafters 369 Screw holes for rafters 370 Arrow 371 Arrow 372 Screw holes for ceiling materials 381 Flooring 382 Gap 390 Joint part (A) 391 Sleeve plate (A) 392 Inclined plate 393 Bottom plate 394 Sleeve riser board 395 Joint part (B)

Claims

[Claim 1] In a 10m high, four-story steel-framed building, A joist is fixed to the center line of the underside of the crest of the deck plate that constitutes the floor slab with a joist screw; A ceiling material fixed to the underside of the joist by a ceiling material screw; The earthquake-resistant M-shaped frame is made of two parallel steel columns made of identical square steel pipes to which four braces are welded in an M shape. By constructing the gable roof with a slope of less than 1 / 20, the interior height dimension from the top of the foundation slab (31) on the first floor to the bottom of the ceiling material (364) on the first floor is 2,310 mm, as shown by the dimension value (G), and the combined dimension value (F) from the top of the second floor floor slab (20) to the bottom of the ceiling material (364) on the floor below is 168 mm. The interior height from the top of the flooring (381) installed on the top of the second floor to the bottom of the ceiling material on the second floor is 2310 mm as shown by the dimension value (E), the combined dimension value (D) from the top of the third floor floor slab (19) to the bottom of the ceiling material on the floor below is 168 mm, the interior height from the top of the flooring installed on the top of the third floor floor slab (19) to the bottom of the ceiling material on the third floor is 2310 mm as shown by the dimension value (C), the combined dimension value (B) from the top of the fourth floor floor slab (18) to the bottom of the ceiling material on the floor below is 168 mm, the interior height from the top of the flooring installed on the top of the fourth floor floor slab (18) to the bottom of the ceiling material on the fourth floor is 2396 mm as shown by the dimension value (A), the slope of the roof formed by the gable roof is 1 / 20, the dimension indicating half the size of the frontage from the outside of the ALC wall panel (15) to the ridge of the gable roof is 1 / 20, and the dimension indicating half the size of the frontage from the outside of the ALC wall panel (15) to the ridge of the gable roof is 1 / 20. The value (K) is 2730 mm, and furthermore, at the ridge of the gable roof, the height dimension of the part constituting the roof, which is the sum of the decorative slate roofing (32) that forms the roof, the asphalt roofing (22) for waterproofing the roof, the sheathing boards (21) (structural plywood), and the attic part, is 164.9 mm, as shown by the dimension value (J). The dimension from the GL (ground level) thus constructed to the maximum height of the building is 9994.9 mm, as shown by the dimension value (I). By constructing in this way, it is possible to ensure that "the interior ceiling height of living rooms shall be 2.1 m or more" as stipulated in the Building Standards Act even in a 10 m high, 4-story building, and this is a 10 m high, 4-story steel-framed construction method characterized by ensuring an interior height that allows people to live comfortably even in a 10 m high, 4-story building.

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