Architectural structure and construction method of architectural structure

Abstract

To provide an architectural structure which simplifies placing a wooden floor on a steel beam and can facilitate manufacturing.SOLUTION: An architectural structure includes: a steel beam including a first steel frame and a second steel frame welded to the first steel frame; an NLT panel formed by laminating a plurality of long woods along a transverse direction and placed on a top face of the steel beam; and a fastening tool fastening the steel beam and the NLT panel.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to buildings and building construction methods. [Background technology]

[0002] Various materials (building materials) are used for the beams and floors of buildings. For example, steel beams made of steel are used to ensure the rigidity of a building, and wooden floors made of wood are used to reduce the weight of the building. Patent Document 1 discloses that protrusions are provided on the top surfaces of the steel frames (steel beams), and these protrusions are used to restrict horizontal movement of wooden panels (wooden floors) placed on the steel frames. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-084730 Summary of the Invention [Problem to be solved by the invention]

[0004] Steel beams are sometimes formed by welding one steel beam to another. In this case, since there are no interfering objects such as stud bolts on the top surface of the steel beam, a wooden floor can be placed directly on the top surface of the steel beam. However, in Patent Document 1, the steel beam has protrusions (interfering objects), making it difficult to place a wooden floor on the steel beam.

[0005] Patent Document 1 also discloses cross-laminated timber (CLT), a wooden flooring material made by laminating and gluing lamina together so that the fiber directions are perpendicular to each other. However, special equipment is required to form cross-laminated timber.

[0006] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide a building that can simplify the placement of wooden floors on steel beams and can be easily manufactured. [Means for solving the problem]

[0007] In order to achieve the above-mentioned objectives, the building of the present disclosure comprises a steel beam including a first steel frame and a second steel frame welded to the first steel frame, an NLT panel formed by stacking multiple long pieces of wood together along the short side and placed on the top surface of the steel beam, and a fastener that fastens the steel beam and the NLT panel. [Effects of the Invention]

[0008] According to the building of the present disclosure, it is possible to simplify the placement of wooden floors on steel beams, and to provide a building that can be easily manufactured. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing a schematic configuration of a building according to a first embodiment. [Figure 2] 1 is a diagram illustrating a schematic configuration of an NLT panel according to a first embodiment. [Figure 3] FIG. 2 is a diagram illustrating the configuration of a steel beam, an NLT panel, and a fastener according to the first embodiment. [Figure 4] 10A and 10B are diagrams for explaining a method for fixing the NLT panel according to the first embodiment. [Figure 5] FIG. 10 is a diagram for explaining a method for fixing an NLT panel according to a modified example of the first embodiment. [Figure 6] FIG. 10 is a diagram schematically showing the configuration of an NLT panel according to a modified example of the first embodiment. [Figure 7] 10A and 10B are diagrams for explaining a method for fixing an NLT panel according to the second embodiment. [Figure 8] FIG. 10 is a diagram for explaining a method for fixing an NLT panel according to a modified example of the second embodiment. [Figure 9]2 is a flowchart of a construction method for a building according to the first embodiment. [Figure 10] 4 is a flowchart of a second construction method for a building according to the first embodiment. [Figure 11] 10 is a flowchart of a construction method for a building according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] A building according to an embodiment of the present disclosure and a construction method for the building will be described below with reference to the drawings. The embodiment shows one aspect of the present disclosure, does not limit the present disclosure, and can be modified as desired within the scope of the technical concept of the present disclosure.

[0011] First Embodiment Fig. 1 is a diagram that schematically shows the configuration of a building 1 according to the first embodiment. As illustrated in Fig. 1, the building 1 includes a steel beam 2, an NLT panel 4, and a fastener 6A (6). Note that Fig. 1 shows only a portion of the building 1 to explain the steel beam 2, the NLT panel 4, and the fastener 6A, but the building 1 also includes components other than those shown in Fig. 1 (for example, walls).

[0012] In the present disclosure, the horizontal direction perpendicular to the up-down direction D1 in which the steel beams 2 extend is referred to as the extension direction D2, and the horizontal direction perpendicular to the extension direction D2 is referred to as the left-right direction D3.

[0013] The steel beam 2 includes a first steel frame 8a and a second steel frame 8b welded to the first steel frame 8a. The steel beam 2 is connected to a beam-column joint 3 and joined to a column 5 via the beam-column joint 3. Each of the first steel frame 8a and the second steel frame 8b extends along the extension direction D2 and is an H-shaped steel including an upper flange 10, a lower flange 12 positioned below the upper flange 10, and a web 14 connecting the upper flange 10 and the lower flange 12. In the first embodiment, one end of the first steel frame 8a on one side in the extension direction D2 is connected to the beam-column joint 3, and the other end is joined to the second steel frame 8b by welding. The upper surface 2a of the steel beam 2 includes the upper surface 11 of the upper flange 10 of the first steel frame 8a and the upper surface 11 of the upper flange 10 of the second steel frame 8b. The column-beam joint 3 may have any configuration as long as it is configured to be able to join the steel beam 2 and the column 5 together.

[0014] The NLT panel 4 will now be described. FIG. 2 is a diagram schematically illustrating the configuration of an NLT panel 4 according to a first embodiment, viewed from above. As illustrated in FIG. 2, the NLT panel 4 includes a plurality of long pieces of wood 30 and nails 32. The pieces of wood 30 are two-by-four lumber such as 2x4 lumber. Each piece of wood 30 is edge-mounted and fastened with nails 32, and is stacked on top of each other along the short-side direction D4 of the piece of wood 30 (NLT: Nail Laminated Timber). In the first embodiment, a flat floor surface 4a is formed by stacking the plurality of pieces of wood 30 on top of each other. As illustrated in FIG. 1, the NLT panel 4 is placed on the upper surface 2a of a steel beam 2 with the floor surface 4a facing upward. The floor surface 4a may have any shape; for example, the floor surface 4a may have a curved shape or a stepped shape that protrudes upward. In the first embodiment, the plurality of wooden pieces 30 are fastened together by the nails 32, but the present disclosure is not limited to this. For example, the nails 32 may be replaced with screws.

[0015] The fasteners 6 fasten the steel beams 2 and the NLT panels 4. Fig. 3 is a diagram showing the schematic configuration of the steel beams 2, NLT panels 4, and fasteners 6A according to the first embodiment, as viewed from the extension direction D2 of the first steel frame 8a. Fig. 4 is a diagram for explaining a method of fixing the NLT panels 4 according to the first embodiment.

[0016] 3 and 4, in the first embodiment, a through hole 16 is formed in the NLT panel 4, penetrating along the up-down direction D1. As illustrated in Fig. 4, the through hole 16 includes a small diameter portion 18, a large diameter portion 20 that is located above the small diameter portion 18 and has a larger diameter than the small diameter portion 18, and a step portion 22 that connects the small diameter portion 18 and the large diameter portion 20.

[0017] 4, the fastener 6A according to the first embodiment includes a stud bolt 24 extending upward from the upper surface 11 of the upper flange 10 of the first steel frame 8a (i.e., the upper surface 2a of the steel beam 2), and a nut 26 threaded onto the stud bolt 24. The lower end of the stud bolt 24 is joined to the upper surface 2a of the steel beam 2 by welding, and a metal bolt collar 28 is attached to the lower end.

[0018] A stud bolt 24 is inserted through the through hole 16. The outer diameter of the stud bolt 24 is approximately the same as the inner diameter of the small diameter portion 18. The inner diameter of the small diameter portion 18 is smaller than the outer diameter of the nut 26 and the outer diameter of the washers 34, 36. The inner diameter of the large diameter portion 20 is larger than the outer diameter of the nut 26 and the outer diameter of the washers 34, 36 so that the nut 26 and the washers 34, 36 can be accommodated in the through hole 16. The fastener 6A does not protrude above the floor surface 4a. The step portion 22 has a step surface 22a facing upward. The nut 26 abuts against the step surface 22a via the washers 34, 36. In other words, the nut 26 abuts against the NLT panel 4 from above. The washers 34 and 36 are not particularly limited, and for example, the washer 34 is a round washer and the washer 36 is a spring washer.

[0019] Incidentally, the present disclosure is not limited to the case where the fastener 6A as illustrated in FIG. 4 does not protrude (project) above the floor surface 4a. FIG. 5 is a diagram for explaining a method of fixing the NLT panel 4 according to a modification of the first embodiment. In the form illustrated in FIG. 5, the through hole 16 has an inner wall surface that is flush, and extends while maintaining an inner diameter approximately the same as the outer diameter of the stud bolt 24. The inner diameter of this through hole 16 is smaller than the outer diameters of the nut 26 and the washers 34 and 36. In the fastener 6A according to the modification of the first embodiment, the stud bolt 24 protrudes above the floor surface 4a. The nut 26 is in contact with the floor surface 4a via the washers 34 and 36. That is, the nut 26 is in contact with the NLT panel 4 from above. By adopting such a configuration, for example, when there is no need to consider the floor level difference, the shape of the through hole 16 can be made simpler than the form illustrated in FIG. 4, and the man-hours for the method of fixing the NLT panel 4 can be reduced.

[0020] In the first embodiment, as illustrated in FIG. 2, the length of the short direction D4 of the wood 30 is denoted as W, and the hole diameter of the through hole 16 is denoted as d. When d≧W / 2 is satisfied, the through hole 16 is formed across the wood 30 and the second wood 38 (30) adjacent to the wood 30. FIG. 6 is a diagram schematically showing the configuration of the NLT panel 4 according to a modification of the first embodiment. As illustrated in FIG. 6, when d<W / 2 is satisfied, the through hole 16 is formed in one wood 30. The through hole 16 is located at the center of this one wood 30 in the short direction D4.

[0021] (Function and Effect) The function and effect of the building 1 according to the first embodiment will be described. According to the first embodiment, since the steel beam 2 is formed by welding the second steel frame 8b to the first steel frame 8a, there is no interference object such as a splice plate provided on the upper surface 2a. Therefore, the NLT panel 4 can be directly placed on the upper surface 2a of the steel beam 2, so that the placement of the NLT panel 4 on the steel beam 2 can be simplified. Further, since the NLT panel 4 is formed only by laminating the woods 30 along the short direction D4, special equipment is not required. Therefore, the manufacture of the building 1 can be facilitated.

[0022] According to the first embodiment, the NLT panel 4 can be fixed to the steel beam 2 by abutting and tightening the nut 26 screwed onto the stud bolt 24 against the stepped portion 22. According to the first embodiment, even if a narrow wood 30 with a width satisfying d≧W / 2 is applied, it is possible to suppress the wood 30 from cracking due to the formation of the through hole 16. According to the configuration illustrated and described in FIG. 6, when applying a wide wood 30 with a width satisfying d<W / 2, the through hole 16 can be formed in one wood 30, facilitating the drilling process (formation of the through hole 16). Further, since the through hole 16 is formed in the central portion of the wood 30, it is possible to suppress a decrease in the strength of the wood 30.

[0023] <Second Embodiment> The building 1 according to the second embodiment of the present disclosure will be described. The building 1 according to the second embodiment has a different fixing direction of the NLT panel 4 from that of the first embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

[0024] FIG. 7 is a diagram for explaining a method of fixing the NLT panel 4 according to the second embodiment. In the second embodiment, as illustrated in FIG. 7, a flange hole 40 penetrating along the vertical direction D1 is formed in the upper flange 10. The inner diameter of the flange hole 40 is approximately the same as the inner diameter of the small-diameter portion 18 of the through hole 16. The fastener 6B (6) includes a stud bolt 42 penetrating the upper flange 10 from below, an upper nut 44 screwed onto the stud bolt 42, and a lower nut 46 screwed onto the stud bolt 42 below the upper nut 44.

[0025] As illustrated in FIG. 7 , the stud bolt 42 is inserted through the flange hole 40 and the through-hole 16. The outer diameter of the stud bolt 42 is approximately the same as the inner diameter of the flange hole 40 and the inner diameter of the small-diameter portion 18. The inner diameter of the small-diameter portion 18 is smaller than the outer diameter of the upper nut 44. The inner diameter of the large-diameter portion 20 is larger than the outer diameter of the upper nut 44 so that the upper nut 44 can be accommodated in the through-hole 16. The fastener 6B does not protrude above the floor surface 4a. The upper nut 44 abuts against the stepped surface 22a via the washers 34 and 36. In other words, the upper nut 44 abuts against the NLT panel 4 from above. The upper surface 46a of the lower nut 46 abuts against the lower surface 13 of the upper flange 10. In other words, the lower nut 46 abuts against the upper flange 10 from below.

[0026] However, the present disclosure is not limited to the fastener 6B not being positioned (protruding) above the floor surface 4a as illustrated in FIG. 7 . FIG. 8 is a diagram illustrating a method for fixing an NLT panel 4 according to a modified example of the second embodiment. In the example illustrated in FIG. 8 , the through hole 16 has a flush inner wall surface and extends with an inner diameter approximately equal to the outer diameter of the stud bolt 42. The inner diameter of the through hole 16 is smaller than the outer diameter of the nut 26 and the outer diameter of the washers 34 and 36. In the fastener 6B according to the modified example of the second embodiment, the stud bolt 42 protrudes above the floor surface 4a. The upper nut 44 abuts against the floor surface 4a via the washers 34 and 36. In other words, the upper nut 44 abuts against the NLT panel 4 from above. With this configuration, for example, when it is not necessary to consider floor unevenness, the shape of the through hole 16 can be simpler than the example illustrated in FIG. 7 , thereby reducing the number of steps required for fixing the NLT panel 4.

[0027] (Actions and Effects) The following describes the operation and effect of the building 1 according to the second embodiment. According to the second embodiment, the NLT panel 4 can be fixed to the steel beam 2 by abutting the upper nut 44 threaded onto the stud bolt 42 against the stepped portion 22 and tightening it, and by abutting the lower nut 46 threaded onto the stud bolt 42 against the upper flange 10 and tightening it.

[0028] According to the second embodiment, since there is no need to weld the stud bolts 42 to the upper surface 2a of the steel beam 2, fire of the NLT panel 4 can be suppressed. In the first embodiment, to suppress fire of the NLT panel 4, the stud bolts 24 are sometimes welded to the upper surface 2a of the steel beam 2 before the NLT panel 4 with the through holes 16 is placed on the steel beam 2. However, in this case, the through holes 16 must be formed in the NLT panel 4 so that the positions of the through holes 16 and the stud bolts 24 do not misalign, which requires highly accurate drilling. In contrast, according to the second embodiment, after the NLT panel 4 without the through holes 16 is placed on the steel beam 2, the through holes 16 are formed in the NLT panel without the through holes 16, and the stud bolts 42 are inserted into the through holes 16, which simplifies the drilling process. Incidentally, the first embodiment does not require the formation of flange holes 40 in the upper flange 10, which is advantageous in that it suppresses a decrease in the strength of the upper flange 10.

[0029] Although not shown, in some embodiments, the fastener 6 is a bolt that penetrates the upper flange 10 from below, and includes a threaded portion and a head connected to the lower end of the threaded portion and having a larger diameter than the threaded portion, and a nut that is screwed onto the threaded portion, with the nut abutting the NLT panel 4 from above and the head of the bolt abutting the upper flange 10 from below.

[0030] <Building construction method> A construction method for the building 1 according to the first embodiment will be described. Fig. 9 is a flowchart of the construction method for the building 1 according to the first embodiment. As illustrated in Fig. 9, the construction method for the building 1 according to the first embodiment includes a welding step S1, a through-hole forming step S2, and a placement step S3. After the placement step S3, the NLT panel 4 and the steel beam 2 are fastened together by fasteners 6A.

[0031] In the welding step S1, the stud bolts 24 are welded to the upper surface 2a (upper surface 11 of the upper flange 10) of the steel beam 2. In the through hole forming step S2, after the welding step S1, through holes 16 are formed in the NLT panel 4 in which no through holes 16 have been formed. In the placing step S3, after the through hole forming step S2, the NLT panel 4 is placed on the upper surface 2a of the steel beam 2.

[0032] According to the method shown in Figure 9, after the stud bolt 24 is welded to the upper surface 2a of the steel beam 2, the NLT panel 4 is placed on the upper surface 2a of the steel beam 2, so that the heat generated during welding can be prevented from entering the NLT panel 4.

[0033] Fig. 10 is a flowchart of a second construction method for the building 1 according to the first embodiment. As illustrated in Fig. 10, the second construction method for the building 1 according to the first embodiment includes a preparation step S11, a placement step S12, and a welding step S13. After the welding step S13, the NLT panel 4 and the steel beam 2 are fastened together by fasteners 6A.

[0034] In a preparation step S11, an NLT panel 4 having a through hole 16 formed therein is prepared. In a placement step S12, after the preparation step S11, the NLT panel 4 is placed on the upper surface 2a of the steel beam 2. In a welding step S13, after the placement step S12, a stud bolt 24 is welded to the upper surface 2a of the steel beam 2.

[0035] According to the method described in Figure 10, the NLT panel 4 having the through hole 16 formed therein can be prepared in advance, for example, in a factory, rather than at the construction site of the building 1, thereby improving the accuracy of forming the through hole 16 in the NLT panel 4.

[0036] A construction method for the building 1 according to the second embodiment will be described. Fig. 11 is a flowchart of the construction method for the building 1 according to the second embodiment. As illustrated in Fig. 11, the construction method for the building 1 according to the second embodiment includes a placing step S21, a through-hole forming step S22, and a fastening step S23.

[0037] In a placing step S21, an NLT panel 4 without a through hole 16 is placed on the upper surface 2a of a steel beam 2. In a through hole forming step S22, after the placing step S21, a through hole 16 is formed in the NLT panel 4 without a through hole 16. In a fastening step S23, after the through hole forming step S22, the NLT panel 4 and the steel beam 2 are fastened together with a fastener 6B. The flange holes 40 may be formed together with the through holes 16, or may be formed in the upper flange 10 in advance.

[0038] According to the method shown in Figure 11, after placing an NLT panel 4 without a through hole 16 on a steel beam 2, a through hole 16 is formed in the NLT panel without a through hole 16 and a stud bolt 42 is inserted into the through hole 16, which makes the drilling process easier than when the through hole 16 is formed in the NLT panel 4 before placing it on the upper surface 2a of the steel beam 2.

[0039] The contents described in each of the above embodiments can be understood, for example, as follows.

[0040] [1] The building (1) according to the present disclosure is: a steel beam (2) including a first steel frame (8a) and a second steel frame (8b) welded to the first steel frame; An NLT panel (4) formed by stacking a plurality of long wooden pieces (30) together along the short direction (D4) and placed on the upper surface (2a) of the steel beam; and fasteners (6) for fastening the steel beams and the NLT panels together.

[0041] According to the configuration described in [1] above, the steel beam is formed by welding the second steel frame to the first steel frame, so there are no obstructions on the top surface. Therefore, the NLT panel can be placed directly on the top surface of the steel beam, simplifying the placement of the NLT panel on the steel beam. Furthermore, since the NLT panel is formed simply by stacking pieces of wood together along the short side, no special equipment is required. This simplifies the manufacturing of buildings.

[0042] [2] In some embodiments, in the configuration described in [1] above, The fastener (6A) includes a stud bolt (24) extending upward from the upper surface of the steel beam and a nut (26) threaded onto the stud bolt, The NLT panel is formed with a through hole (16) that penetrates along the vertical direction (D1) and through which the stud bolt is inserted, The nut abuts against the NLT panel from above.

[0043] According to the configuration described in [2] above, the NLT panel can be fixed to the steel beam.

[0044] [3] In some embodiments, in the configuration described in [1] above, The fastener (6B) includes a stud bolt (42) that penetrates from below a flange (10) located above the web (14) of the steel beam, an upper nut (44) that is screwed onto the stud bolt, and a lower nut (46) that is screwed onto the stud bolt below the upper nut, The NLT panel is formed with a through hole (16) that penetrates along the vertical direction and through which the stud bolt is inserted, The upper nut abuts against the NLT panel from above, The lower nut abuts against the flange from below.

[0045] According to the configuration described in [3] above, the NLT panel can be fixed to the steel beam.

[0046] [4] In some embodiments, in the configuration described in [2] or [3] above, The through hole includes a small diameter portion (18), a large diameter portion (20) located above the small diameter portion and having a larger diameter than the small diameter portion, and a step portion (22) connecting the small diameter portion and the large diameter portion.

[0047] According to the configuration described in [4] above, the NLT panel can be fixed to the steel beam by abutting and tightening the nut and the upper nut against the stepped portion.

[0048] [5] In some embodiments, in the configuration described in any one of [2] to [4] above, If the length of the wood in the short direction is W and the diameter of the through hole is d, When d≥W / 2 is satisfied, the through hole is formed across the wood and the second wood (38) adjacent to the wood.

[0049] According to the configuration described in [5] above, even if a narrow wood that satisfies d≥W / 2 is applied, it is possible to suppress the wood from cracking.

[0050] [6] In some embodiments, in the configuration described in any one of [2] to [5] above, If the length of the wood in the short direction is W and the diameter of the through hole is d, When d<W / 2 is satisfied, the through hole is formed in the central portion of the wood.

[0051] According to the configuration described in [6] above, when applying a wide wood that satisfies d<W / 2, a through hole can be formed in one wood, facilitating the drilling process (formation of the through hole).

[0052] [7] The building construction method described in [2] above, A welding step (S1) of welding the stud bolt to the upper surface of the steel beam, After the welding step, a through hole forming step (S2) of forming the through hole in the NLT panel where the through hole is not formed, After the through hole forming step, a placing step (S3) of placing the NLT panel on the upper surface of the steel beam, are provided. <00002二十二3>

[0053] According to the method described in [7] above, after the stud bolts are welded to the top surface of the steel beam, the NLT panel is placed on the top surface of the steel beam, so that the heat generated during welding can be prevented from entering the NLT panel.

[0054] [8] The construction method for the building described in [2] above, A preparation step (S11) of preparing the NLT panel in which the through hole is formed; After the preparation step, a placement step (S12) of placing the NLT panel on the upper surface of the steel beam; After the placing step, a welding step (S13) is provided in which the stud bolts are welded to the upper surfaces of the steel beams.

[0055] According to the method described in [8] above, the NLT panel with the through holes formed therein can be prepared in advance, for example, in a factory, and therefore the precision with which the through holes are formed in the NLT panel can be improved.

[0056] [9] The construction method for the building described in [3] above, A step (S21) of placing the NLT panel without the through hole on the upper surface of the steel beam; After the placing step, a through-hole forming step (S22) of forming the through-hole in the NLT panel in which the through-hole is not formed; After the through-hole forming step, a fastening step (S23) is provided in which the NLT panel and the steel beam are fastened together by the stud bolt.

[0057] According to the method described in [9] above, an NLT panel without through holes is placed on the top surface of a steel beam, and then through holes are formed in this NLT panel. This makes it easier to drill holes (form through holes) compared to when through holes are formed in the NLT panel before being placed on the top surface of a steel beam. [Explanation of symbols]

[0058] 1 Building 2 Steel beams 2a Top surface of steel beam 3 Column beam joint 4 NLT Panel 4a NLT panel floor 5 pillars 6 Fasteners 6A Fastener (first embodiment) 6B Fastener (Second embodiment) 8a First steel frame 8b Second steel frame 10 Upper flange 11 Top surface of upper flange 12 Lower flange 14. Web 16 through holes 18 Small diameter section 20 Large diameter section 22 Step 22a Step surface of step part 24 Stud bolt (first embodiment) 26 Nut 28 Bolt Color 30 wood 32 nails 34 Washer 36 Washer 38 Second wood 40 flange hole 42 Stud bolt (second embodiment) 44 Upper nut 46 Lower nut D1 Vertical direction D2 Extending direction D3 Left and right direction D4 Short side direction S1 Welding Step S2 Through-hole formation step S3 Placement step S11 Preparation Steps S12 Placement step S13 Welding Step S21 Placement step S22 Through-hole formation step S23 Fastening step

Claims

1. a steel beam including a first steel frame and a second steel frame welded to the first steel frame; An NLT panel formed by stacking a plurality of long wooden pieces together along the short side direction and placed on the top surface of the steel beam; and a fastener for fastening the steel beam and the NLT panel. architecture.

2. The fastener includes a stud bolt extending upward from an upper surface of the steel beam and a nut threaded onto the stud bolt, The NLT panel has a through hole formed therein that penetrates along the vertical direction and through which the stud bolt is inserted, The nut abuts against the NLT panel from above. The building according to claim 1.

3. The fastener includes a stud bolt that penetrates from below a flange located above the web of the steel beam, an upper nut that is screwed onto the stud bolt, and a lower nut that is screwed onto the stud bolt below the upper nut, The NLT panel has a through hole formed therein that penetrates along the vertical direction and through which the stud bolt is inserted, The upper nut abuts against the NLT panel from above, The lower nut abuts against the flange from below. The building according to claim 1.

4. The through hole includes a small diameter portion, a large diameter portion located above the small diameter portion and having a larger diameter than the small diameter portion, and a step portion connecting the small diameter portion and the large diameter portion.

4. The building according to claim 2 or 3.

5. When the length of the wood in the short direction is W and the diameter of the through hole is d, When d≧W / 2 is satisfied, the through hole is formed across the wooden piece and a second wooden piece adjacent to the wooden piece.

4. The building according to claim 2 or 3.

6. When the length of the wood in the short direction is W and the diameter of the through hole is d, When d<W / 2 is satisfied, the through hole is formed in the center of the wood.

4. The building according to claim 2 or 3.

7. The construction method for a building according to claim 2, a welding step of welding the stud bolt to the upper surface of the steel beam; After the welding step, a through-hole forming step of forming the through-hole in the NLT panel in which the through-hole is not formed; After the through-hole forming step, a placing step is provided in which the NLT panel is placed on the upper surface of the steel beam. Construction methods for buildings.

8. The construction method for a building according to claim 2, a preparation step of preparing the NLT panel having the through-hole formed therein; After the preparation step, a placement step of placing the NLT panel on the upper surface of the steel beam; and a welding step of welding the stud bolt to the upper surface of the steel beam after the placing step. Construction methods for buildings.

9. The construction method for a building according to claim 3, A placing step of placing the NLT panel without the through hole on the upper surface of the steel beam; After the placing step, a through-hole forming step of forming the through-hole in the NLT panel in which the through-hole is not formed; After the through-hole forming step, a fastening step is provided in which the NLT panel and the steel beam are fastened together by the fastener. Construction methods for buildings.

Images