Horizontal structural members of buildings and buildings

Abstract

To provide a horizontal structural member for a building and a building that can effectively suppress floor vibrations. [Solution] The horizontal member 20 comprises a main member 30 and an auxiliary member 40 positioned on the side of the main member 30. The auxiliary member 40 is joined to the main member 30 by a flexible joining means. The cross-sectional dimensions of the main member 30 are different from the cross-sectional dimensions of the auxiliary member 40, or the length L1 of the main member 30 in the longitudinal direction A1 of the horizontal member 20 is different from the length L2 of the auxiliary member 40 in the longitudinal direction A1.

Description

Technical Field

[0001] The present disclosure relates to horizontal members of a building and a building.

Background Art

[0002] A method of suppressing floor vibration is known by preventing the natural frequencies of the respective structural members of a building from concentrating on a specific frequency. For example, in Patent Document 1, a plurality of beams having different longitudinal or lateral lengths or the like are arranged at intervals so that the natural frequencies of the respective structural members of a building do not concentrate on a specific frequency.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the method as in Patent Document 1, beams of various sizes are required, so there is a risk of increased costs and construction labor. Therefore, there is room for consideration in the horizontal members for suppressing floor vibration.

Means for Solving the Problems

[0005] (1) The horizontal member of a building for solving the above problems is a horizontal member that supports the floor of a building, and includes a main member and an auxiliary member disposed on a side surface of the main member. The auxiliary member is joined to the main member by flexible joining means, and the cross-sectional dimension of the main member is different from the cross-sectional dimension of the auxiliary member, or the length of the main member in the longitudinal direction of the horizontal member is different from the length of the auxiliary member in the longitudinal direction.

[0006] In this configuration, auxiliary members, which differ from the main member in cross-sectional dimensions or longitudinal length, are positioned on the side of the main member by flexible joining means. Therefore, since the main member and the auxiliary members have different natural frequencies, their vibrations cancel each other out, and the vibrations are dampened, thereby effectively suppressing floor vibrations.

[0007] (2) In the horizontal member described in (1) above, the flexible joining means includes a plurality of connecting members, the connecting members being inserted in the width direction of the horizontal member so as to extend from the main member to the auxiliary member.

[0008] With this configuration, the connecting member is inserted so as to span both the main material and the auxiliary material, allowing the vibrations of the main material and the auxiliary material to cancel each other out.

[0009] (3) In the horizontal member described in (2) above, the multiple connecting members are attached to the main member and the auxiliary member at intervals of 1 m or more in the longitudinal direction.

[0010] With this configuration, multiple connecting members are arranged at intervals of 1 m or more in the longitudinal direction. Compared to the case where they are arranged at intervals of less than 1 m, the auxiliary members can be joined to the side surface of the main member in such a way that the main member and the auxiliary members effectively cancel each other out in vibration.

[0011] (4) In the horizontal member described in (3) above, the connecting member includes drift pins, and the main member and the auxiliary member are pin-jointed by a plurality of the drift pins.

[0012] With this configuration, the auxiliary material can be suitably joined to the side of the main material by pin joining with multiple drift pins, such that the vibrations of the main material and the auxiliary material cancel each other out.

[0013] (5) In any one of the horizontal members described in (1) to (4) above, the length of the auxiliary member in the longitudinal direction is equal to the length of the main member in the longitudinal direction, and the height of the auxiliary member in the height direction of the horizontal member is less than the height of the main member in the height direction.

[0014] In this configuration, since the height of the auxiliary material differs from that of the main material in the vertical direction, the auxiliary material has a different natural frequency from that of the main material. Therefore, the vibrations of the main material and the auxiliary material cancel each other out, and the vibrations are dampened, thereby effectively suppressing floor vibrations.

[0015] (6) In any one of the horizontal members described in (1) to (5) above, the main member has a first end and a second end opposite to the first end in the longitudinal direction, and the auxiliary member has a third end and a fourth end opposite to the third end in the longitudinal direction, and the first end of the main member is in the same position as the third end of the auxiliary member in the longitudinal direction.

[0016] With this configuration, since the first end of the main member and the third end of the auxiliary member are in the same position, the main member and the auxiliary member can be suitably supported at the first end of the main member and the third end of the auxiliary member by members that support the horizontal members.

[0017] (7) In the horizontal member described in (6) above, the second end of the main member is in the same position as the fourth end of the auxiliary member in the longitudinal direction.

[0018] With this configuration, since the second end of the main member and the fourth end of the auxiliary member are in the same position, the main member and the auxiliary member can be suitably supported at the second end of the main member and the fourth end of the auxiliary member by two members that support the horizontal member.

[0019] (8) Among any one of the cross members (1) to (7) above, a first auxiliary member is provided as the auxiliary member. The main member has a first side surface and a second side surface opposite to the first side surface. The first auxiliary member has a third side surface and a fourth side surface opposite to the third side surface. The first auxiliary member is arranged such that the fourth side surface of the first auxiliary member contacts the first side surface of the main member.

[0020] According to this configuration, since the fourth side surface of the first auxiliary member contacts the first side surface of the main member, the vibration of the main member can be suitably attenuated by the first auxiliary member.

[0021] (9) The cross member of (8) above further includes a second auxiliary member as the auxiliary member. The second auxiliary member has a fifth side surface and a sixth side surface opposite to the fifth side surface. The second auxiliary member is arranged such that the fifth side surface of the second auxiliary member contacts the second side surface of the main member.

[0022] According to this configuration, since the fifth side surface of the second auxiliary member contacts the second side surface of the main member, the vibration of the main member can be suitably attenuated by the second auxiliary member.

[0023] (10) Among any one of the cross members (1) to (9) above, the main member and the auxiliary member are made of wood. According to this configuration, the vibration of the floor can be suitably suppressed by the main member and the auxiliary member made of wood.

[0024] (11) The building that solves the above problems is a building having a frame. The frame has any one of the cross members (1) to (10) above, and the cross member is supported at both ends in the longitudinal direction.

[0025] According to this configuration, since the frame has the above-mentioned cross member, in the building, the vibration of the portion supported by the cross member with both ends supported can be suppressed.

[0026] (12) In the building of (11) above, the frame body includes a first shaft member and a second shaft member arranged at an interval from the first shaft member in the longitudinal direction. The first end portion of the main material is fixed to the first shaft member, the second end portion of the main material is fixed to the second shaft member, the third end portion of the auxiliary material is fixed to the first shaft member, and the fourth end portion of the auxiliary material is fixed to the second shaft member.

[0027] According to this configuration, since the frame body has the above-described lateral beam, in the building, the vibration of the portion supported by the laterally supported beam fixed at both ends can be suppressed.

Effect of the Invention

[0028] According to the lateral beam of the building and the building of the present disclosure, the vibration of the floor can be suitably suppressed.

Brief Description of the Drawings

[0029] [Figure 1] It is a front view showing the whole building of the first embodiment. [Figure 2] It is a plan view showing the floor of the building of FIG. 1. [Figure 3] It is a perspective view of the lateral beam of FIG. 2. [Figure 4] It is a cross-sectional view taken along the line D4-D4 of FIG. 2. [Figure 5] It is a perspective view of the lateral beam of the second embodiment. [Figure 6] It is a cross-sectional view of the lateral beam of FIG. 5. [Figure 7] It is a perspective view of the lateral beam of the first modification example. [Figure 8] It is a perspective view of the lateral beam of the second modification example. [Figure 9] It is a perspective view of the lateral beam of the third modification example. [Figure 10] It is a perspective view of the lateral beam of the fourth modification example. [Figure 11] It is a perspective view of the lateral beam of the fifth modification example. [Figure 12] It is a perspective view of the lateral beam of the sixth modification example. [Figure 13]This is a perspective view of the horizontal member in the seventh modification example. [Figure 14] This is a perspective view of the horizontal member in the eighth modification example. [Figure 15] This is a perspective view of the horizontal member in the ninth modification example. [Modes for carrying out the invention]

[0030] (First Embodiment) Referring to Figures 1 to 4, the horizontal members 20 of the building 1 and the building 1 of the first embodiment will be described. Examples of the building 1 include apartment buildings, detached houses, and commercial facilities. The building 1 has multiple floors. In this embodiment, the building 1 will be described as an office building having multiple floors.

[0031] In this embodiment, the horizontal members 20 of the building 1 and the building 1 will be described using directions defined as follows. The direction in which the horizontal member 20 extends is defined as the longitudinal direction A1 of the horizontal member 20. The direction that is perpendicular to the longitudinal direction A1 and intersects the side surface of the horizontal member 20 is defined as the width direction A2 of the horizontal member 20. The direction that is perpendicular to both the longitudinal direction A1 and the width direction A2 is defined as the height direction A3 of the horizontal member 20.

[0032] As shown in Figures 1 and 2, each floor of building 1 has a floor 2. The floor 2 is located, for example, on the living floor of building 1. In this embodiment, the floor 2 is described as the floor of the second floor of building 1. The floor 2 may constitute the floor of the first floor, or it may constitute the floor of the third floor or higher. The floor 2 is made up of at least one flooring material 3. The floor 2 is formed by arranging multiple flooring materials 3 side by side on a part of the building frame 10.

[0033] <Skeletal structure> As shown in Figure 2, the building 1 comprises a frame 10 as its skeletal structure. The frame 10 includes at least one of columns, beams, and girders. The frame 10 includes a first axial member 11 and a second axial member 12.

[0034] The first axial member 11 includes a beam or girder. The first axial member 11 extends along the width direction A2. The second axial member 12 includes a beam or girder. The second axial member 12 extends along the width direction A2. The first axial member 11 is spaced apart from the second axial member 12 in the longitudinal direction A1. The first axial member 11 and the second axial member 12 support the floor material 3.

[0035] The structural frame 10 includes a third axial member 13 and a fourth axial member 14. The third axial member 13 includes a beam or girder. The third axial member 13 extends along the longitudinal direction A1. The fourth axial member 14 includes a beam or girder. The fourth axial member 14 extends along the longitudinal direction A1. The third axial member 13 is spaced apart from the fourth axial member 14 in the width direction A2. The third axial member 13 and the fourth axial member 14 support the floor material 3.

[0036] The structural frame 10 includes at least one fifth axial member 15. The fifth axial member 15 includes a beam or girder. Figure 2 shows three fifth axial members 15 as an example. The fifth axial members 15 extend along the longitudinal direction A1. The fifth axial members 15 are arranged together with the horizontal members 20 in the width direction A2.

[0037] The fifth shaft member 15 is positioned between the first shaft member 11 and the second shaft member 12 in the longitudinal direction A1. The fifth shaft member 15 is positioned between the third shaft member 13 and the fourth shaft member 14 in the width direction A2. One end of the fifth shaft member 15 is supported by the first shaft member 11. The other end of the fifth shaft member 15 is supported by the second shaft member 12.

[0038] The structural frame 10 includes a plurality of support columns 16. The plurality of support columns 16 support a first axial member 11, a second axial member 12, a third axial member 13, and a fourth axial member 14. The support columns 16 include through columns or columns for each floor.

[0039] <Horizontal structural members> As shown in Figures 2 to 4, the structural frame 10 has horizontal members 20. The horizontal members 20 include beams or girders. The horizontal members 20 extend along the longitudinal direction A1. The horizontal members 20 support the floor 2. Figure 2 shows two horizontal members 20 as an example. The horizontal members 20 are provided, for example, in the necessary parts according to the building plan.

[0040] The horizontal member 20 is positioned between the first axial member 11 and the second axial member 12 in the longitudinal direction A1. The horizontal member 20 is positioned between the third axial member 13 and the fourth axial member 14 in the width direction A2. The horizontal member 20 is supported at both ends in the longitudinal direction A1.

[0041] The horizontal member 20 comprises a main member 30 and auxiliary members 40 positioned on the side of the main member 30. The main member 30 functions as a component of the structural frame 10. The auxiliary members 40 assist the function of the main member 30 as a component of the structural frame 10.

[0042] The main member 30 and the auxiliary member 40 are made of wood. The main member 30 and the auxiliary member 40 may also be made of metal. The length L1 of the main member 30 in the longitudinal direction A1 is equal to the length of the fifth axis member 15. The length L1 of the main member 30 is, for example, 7 m or more.

[0043] The main member 30 has a first end 31 and a second end 32 opposite to the first end 31 in the longitudinal direction A1. The first end 31 of the main member 30 substantially coincides with one end of the horizontal member 20. The second end 32 of the main member 30 substantially coincides with the other end of the horizontal member 20.

[0044] The first end 31 of the main member 30 is supported by the first shaft member 11. In this embodiment, the first end 31 of the main member 30 is fixed to the first shaft member 11. In one example, the first end 31 of the main member 30 is fixed to the first shaft member 11 with connecting hardware. The first end 31 of the main member 30 may be simply supported by the first shaft member 11. The state in which the first end 31 of the main member 30 is simply supported by the first shaft member 11 is, for example, a state in which the first end 31 of the main member 30 is supported by the first shaft member 11 so as to be rotatable and movable. In this case, the movement is slight, and the rotation is slight.

[0045] The second end 32 of the main member 30 is supported by the second shaft member 12. In this embodiment, the second end 32 of the main member 30 is fixed to the second shaft member 12. In one example, the second end 32 of the main member 30 is fixed to the second shaft member 12 with connecting hardware. The second end 32 of the main member 30 may also be simply supported by the second shaft member 12. The state in which the second end 32 of the main member 30 is simply supported by the second shaft member 12 is, for example, a state in which the second end 32 of the main member 30 is supported by the second shaft member 12 so as to be rotatable and movable. In this case, the movement is slight, and the rotation is slight.

[0046] The horizontal member 20 includes a first auxiliary member 50 as an auxiliary member 40. In this embodiment, the first auxiliary member 50 will be described as the auxiliary member 40. The auxiliary member 40 has a third end 51 and a fourth end 52 opposite to the third end 51 in the longitudinal direction A1. In the longitudinal direction A1, the first end 31 of the main member 30 is in the same position as the third end 51 of the auxiliary member 40. In the longitudinal direction A1, the second end 32 of the main member 30 is in the same position as the fourth end 52 of the auxiliary member 40.

[0047] The third end 51 of the auxiliary member 40 is supported by the first shaft member 11. In this embodiment, the third end 51 of the auxiliary member 40 is fixed to the first shaft member 11. In one example, the third end 51 of the auxiliary member 40 is fixed to the first shaft member 11 with a connecting fitting.

[0048] The third end 51 of the auxiliary member 40 may be simply supported by the first shaft member 11. The state in which the third end 51 of the auxiliary member 40 is simply supported by the first shaft member 11 is, for example, a state in which the third end 51 of the auxiliary member 40 is rotatably and movably supported by the first shaft member 11. In this case, the movement is slight, and the rotation is slight.

[0049] The fourth end 52 of the auxiliary member 40 is supported by the second shaft member 12. In this embodiment, the fourth end 52 of the auxiliary member 40 is fixed to the second shaft member 12. In one example, the fourth end 52 of the auxiliary member 40 is fixed to the second shaft member 12 with a connecting fitting.

[0050] The fourth end 52 of the auxiliary member 40 may be simply supported by the second shaft member 12. The state in which the fourth end 52 of the auxiliary member 40 is simply supported by the second shaft member 12 is, for example, a state in which the fourth end 52 of the auxiliary member 40 is rotatably and movably supported by the second shaft member 12. In this case, the movement is slight, and the rotation is slight.

[0051] The cross-sectional dimensions of the main member 30 are different from those of the auxiliary member 40, or the length L1 of the main member 30 in the longitudinal direction A1 is different from the length of the auxiliary member 40 in the longitudinal direction A1. In other words, the cross-sectional area of ​​the main member 30 is different from that of the auxiliary member 40, or the length L1 of the main member 30 in the longitudinal direction A1 is different from the length of the auxiliary member 40 in the longitudinal direction A1. Therefore, the main member 30 has a different natural frequency than the auxiliary member 40. In this embodiment, the length of the auxiliary member 40 is described as the length L2 of the first auxiliary member 50.

[0052] As shown in Figure 3, in this embodiment, the length L2 of the first auxiliary member 50 in the longitudinal direction A1 is equal to the length L1 of the main member 30 in the longitudinal direction A1. The width W2 of the auxiliary member 40 in the width direction A2 is equal to the width W1 of the main member 30. The height H2 of the auxiliary member 40 in the height direction A3 is smaller than the height H1 of the main member 30 in the height direction A3. In other words, the cross-sectional area of ​​the auxiliary member 40 is smaller than the cross-sectional area of ​​the main member 30.

[0053] The main material 30 has a first side surface 33 and a second side surface 34 opposite to the first side surface 33. The first auxiliary material 50 has a third side surface 53 and a fourth side surface 54 opposite to the third side surface 53. The first auxiliary material 50 is positioned so that its fourth side surface 54 is in contact with the first side surface 33 of the main material 30.

[0054] The main member 30 has a first upper surface 35 and a first lower surface 36 opposite to the first upper surface 35 in the height direction A3. The first auxiliary member 50 has a second upper surface 55 and a second lower surface 56 opposite to the second upper surface 55. The first auxiliary member 50 is positioned such that its second upper surface 55 aligns with the first upper surface 35 of the main member 30.

[0055] <Flexible joining means> The auxiliary member 40 is joined to the main member 30 by a flexible joining means. The flexible joining means is, for example, a joining means that allows movement and angle changes of the auxiliary member 40 relative to the main member 30. There is a small gap between the main member 30 and the auxiliary member 40.

[0056] The flexible joining means includes a plurality of connecting members 70. The connecting members 70 are inserted in the width direction A2 of the horizontal member 20 so as to span both the main member 30 and the auxiliary member 40. The auxiliary member 40 is joined to the main member 30 by the connecting members 70 so as to be movable or rotatable. In this case, the movement is slight, and the rotation is slight.

[0057] As shown in Figures 3 and 4, the multiple connecting members 70 are attached to the main member 30 and the auxiliary member 40 at intervals of 1 m or more in the longitudinal direction A1. The multiple connecting members 70 are attached to the main member 30 and the auxiliary member 40 side by side in the height direction A3.

[0058] In the height direction A3, multiple connecting members 70 attached to the main member 30 and auxiliary member 40 are considered as one group. Within a group, the connecting members 70 are arranged at equal intervals in the height direction A3. In this embodiment, seven groups are attached to the main member 30 and auxiliary member 40 at equal intervals with a spacing of 1 m or more in the longitudinal direction A1. One group includes, for example, four connecting members 70. The number of groups in the longitudinal direction A1 is set according to the shorter of the length L1 of the main member 30 and the length L2 of the auxiliary member 40. The number of connecting members 70 included in one group is set according to the shorter of the height H1 of the main member 30 and the height H2 of the auxiliary member 40.

[0059] The connecting member 70 includes drift pins 71. The main member 30 and the auxiliary member 40 are pin-jointed by a plurality of drift pins 71. One end of the drift pin 71 is provided with a friction portion 71X that engages with the main member 30 or the auxiliary member 40 by friction. The drift pin 71 is inserted into the main member 30 and the auxiliary member 40 such that the friction portion 71X engages with only one of the main member 30 or the auxiliary member 40. Therefore, with respect to the drift pin 71, one of the main member 30 and the auxiliary member 40 is more easily rotated and moved than the other. The connecting member 70 may also include screws.

[0060] The main material 30 is provided with multiple first holes 37 into which drift pins 71 are inserted. The multiple first holes 37 are provided in the main material 30 so that one group of drift pins 71 can be inserted in the height direction A3. The multiple first holes 37 are provided in the main material 30 at intervals of 1 m or more in the longitudinal direction A1. The number of first holes 37 is set to match the number of drift pins 71.

[0061] The first auxiliary member 50 is provided with a plurality of second holes 57 into which drift pins 71 are inserted. The plurality of second holes 57 are provided in the first auxiliary member 50 so that one group of drift pins 71 can be inserted in the height direction A3. The plurality of second holes 57 are provided in the first auxiliary member 50 at intervals of 1 m or more in the longitudinal direction A1. The number of second holes 57 is set to match the number of drift pins 71. The second holes 57 of the first auxiliary member 50 are provided in the first auxiliary member 50 so as to correspond to the first holes 37 of the main member 30.

[0062] <Operation of the First Embodiment> In this embodiment, the horizontal member 20 has a first auxiliary member 50, which has a smaller cross-sectional dimension than the main member 30, attached to the side surface of the main member 30 by drift pins 71. Therefore, the main member 30 and the first auxiliary member 50, which have different natural frequencies, cancel each other out, and the vibrations are dampened, thereby effectively suppressing vibrations of the floor 2.

[0063] <Effects of the First Embodiment> The effects of the first embodiment will be explained. (1-1) A horizontal member 20 supporting the floor 2 of a building 1, comprising a main member 30 and an auxiliary member 40 positioned on the side surface of the main member 30. The auxiliary member 40 is joined to the main member 30 by a flexible joining means. The cross-sectional dimensions of the main member 30 are different from the cross-sectional dimensions of the auxiliary member 40, or the length L1 of the main member 30 in the longitudinal direction A1 of the horizontal member 20 is different from the length L2 of the auxiliary member 40 in the longitudinal direction A1.

[0064] In this configuration, auxiliary members 40, which have different cross-sectional dimensions or lengths in the longitudinal direction A1 from the main member 30, are arranged on the side surface of the main member 30 by flexible joining means. Therefore, since the main member 30 and the auxiliary members 40 have different natural frequencies, their vibrations cancel each other out, and the vibrations are dampened, thereby effectively suppressing vibrations of the floor 2.

[0065] (1-2) The flexible joining means includes a plurality of connecting members 70. The connecting members 70 are inserted in the width direction A2 of the horizontal member 20 so as to span the main member 30 and the auxiliary member 40.

[0066] With this configuration, the connecting member 70 is inserted so as to span both the main member 30 and the auxiliary member 40, allowing the vibrations of the main member 30 and the auxiliary member 40 to cancel each other out.

[0067] (1-3) Multiple connecting members 70 are attached to the main member 30 and auxiliary member 40 at intervals of 1 m or more in the longitudinal direction A1.

[0068] With this configuration, since the multiple connecting members 70 are arranged at intervals of 1 m or more in the longitudinal direction A1, the auxiliary members 40 can be joined to the side surface of the main member 30 in such a way that the main member 30 and the auxiliary members 40 effectively cancel each other out in vibration, compared to when they are arranged at intervals of less than 1 m.

[0069] (1-4) The connecting member 70 includes drift pins 71. The main member 30 and the auxiliary member 40 are pin-jointed by a plurality of drift pins 71.

[0070] With this configuration, the auxiliary material 40 can be suitably joined to the side surface of the main material 30 by pin joining with a plurality of drift pins 71, such that the main material 30 and the auxiliary material 40 cancel each other out in vibration.

[0071] (1-5) The length L2 of the auxiliary member 40 in the longitudinal direction A1 is equal to the length L1 of the main member 30 in the longitudinal direction A1. The height H2 of the auxiliary member 40 in the height direction A3 of the horizontal member 20 is less than the height H1 of the main member 30 in the height direction A3.

[0072] In this configuration, the height H2 of the auxiliary material 40 in the height direction A3 is different from that of the main material 30, so the auxiliary material 40 has a different natural frequency from the main material 30. Therefore, the vibrations of the main material 30 and the auxiliary material 40 cancel each other out, and the vibrations are dampened, thereby effectively suppressing the vibrations of the floor 2.

[0073] (1-6) The main member 30 has a first end 31 and a second end 32 opposite to the first end 31 in the longitudinal direction A1. The auxiliary member 40 has a third end 51 and a fourth end 52 opposite to the third end 51 in the longitudinal direction A1. In the longitudinal direction A1, the first end 31 of the main member 30 is in the same position as the third end 51 of the auxiliary member 40.

[0074] With this configuration, since the first end 31 of the main member 30 and the third end 51 of the auxiliary member 40 are in the same position, the main member 30 and the auxiliary member 40 can be suitably supported at the first end 31 of the main member 30 and the third end 51 of the auxiliary member 40 by the member that supports the horizontal member 20.

[0075] (1-7) In the longitudinal direction A1, the second end 32 of the main member 30 is in the same position as the fourth end 52 of the auxiliary member 40.

[0076] With this configuration, since the second end 32 of the main member 30 and the fourth end 52 of the auxiliary member 40 are in the same position, the main member 30 and the auxiliary member 40 can be supported by the two members that support the horizontal member 20 at the second end 32 of the main member 30 and the fourth end 52 of the auxiliary member 40.

[0077] (1-8) The horizontal member 20 is equipped with a first auxiliary member 50 as an auxiliary member 40. The main member 30 has a first side surface 33 and a second side surface 34 opposite to the first side surface 33. The first auxiliary member 50 has a third side surface 53 and a fourth side surface 54 opposite to the third side surface 53. The first auxiliary member 50 is positioned such that its fourth side surface 54 is in contact with the first side surface 33 of the main member 30.

[0078] With this configuration, the fourth side surface 54 of the first auxiliary material 50 comes into contact with the first side surface 33 of the main material 30, so that the vibration of the main material 30 can be effectively dampened by the first auxiliary material 50.

[0079] (1-9) The main material 30 and auxiliary material 40 are made of wood. With this configuration, vibrations of the floor 2 can be effectively suppressed by the main material 30 and auxiliary material 40, which are made of wood.

[0080] (1-10) The building 1 comprises a structural frame 10. The structural frame 10 has horizontal members 20. The horizontal members 20 are supported at both ends in the longitudinal direction A1. With this configuration, because the structural frame 10 has horizontal members 20, vibrations in the parts of the building 1 supported by the horizontal members 20 with both ends supported can be suppressed. An example of a part supported by the horizontal members 20 with both ends supported is the floor of the second floor, etc.

[0081] (1-11) The frame 10 includes a first shaft member 11 and a second shaft member 12 positioned at a distance from the first shaft member 11 in the longitudinal direction A1. The first end 31 of the main member 30 is fixed to the first shaft member 11. The second end 32 of the main member 30 is fixed to the second shaft member 12. The third end 51 of the auxiliary member 40 is fixed to the first shaft member 11. The fourth end 52 of the auxiliary member 40 is fixed to the second shaft member 12.

[0082] With this configuration, since the structural frame 10 has horizontal members 20, vibrations in the parts of the building 1 that are supported by the horizontal members 20 fixed at both ends can be suppressed. An example of a part that is supported by the horizontal members 20 fixed at both ends is the floor of the second floor, etc.

[0083] (Second Embodiment) Referring to Figures 5 and 6, the horizontal members 20 of the building 1 and the building 1 according to the second embodiment will be described. In this embodiment, components common to the first embodiment are denoted by the same reference numerals as in the first embodiment, and the description of redundant components is omitted.

[0084] In this embodiment, the horizontal member 20 further comprises a second auxiliary member 60 as an auxiliary member 40. The second auxiliary member 60 has a fifth end 61 and a sixth end 62 opposite to the fifth end 61 in the longitudinal direction A1. In the longitudinal direction A1, the first end 31 of the main member 30 is in the same position as the fifth end 61 of the second auxiliary member 60. In the longitudinal direction A1, the second end 32 of the main member 30 is in the same position as the sixth end 62 of the second auxiliary member 60.

[0085] The fifth end 61 of the second auxiliary member 60 is supported by the first shaft member 11. In this embodiment, the fifth end 61 of the second auxiliary member 60 is fixed to the first shaft member 11. In one example, the fifth end 61 of the second auxiliary member 60 is fixed to the first shaft member 11 with a connecting fitting.

[0086] The fifth end 61 of the second auxiliary member 60 may be simply supported by the first shaft member 11. The state in which the fifth end 61 of the second auxiliary member 60 is simply supported by the first shaft member 11 is, for example, a state in which the fifth end 61 of the second auxiliary member 60 is rotatably and movably supported by the first shaft member 11. In this case, the movement is slight, and the rotation is slight.

[0087] The sixth end 62 of the second auxiliary member 60 is supported by the second shaft member 12. In this embodiment, the sixth end 62 of the second auxiliary member 60 is fixed to the second shaft member 12. In one example, the sixth end 62 of the second auxiliary member 60 is fixed to the second shaft member 12 with a connecting fitting.

[0088] The sixth end 62 of the second auxiliary member 60 may be simply supported by the second shaft member 12. The state in which the sixth end 62 of the second auxiliary member 60 is simply supported by the second shaft member 12 is, for example, a state in which the sixth end 62 of the second auxiliary member 60 is rotatably and movably supported by the second shaft member 12. In this case, the movement is slight, and the rotation is slight.

[0089] The second auxiliary member 60 is positioned in the width direction A2 on the opposite side of the main member 30 from the first auxiliary member 50. The second auxiliary member 60 has a fifth side surface 63 and a sixth side surface 64 opposite to the fifth side surface 63. The second auxiliary member 60 is positioned so that its fifth side surface 63 is in contact with the second side surface 34 of the main member 30.

[0090] The second auxiliary member 60 has a third upper surface 65 and a third lower surface 66 opposite to the third upper surface 65. The first auxiliary member 50 is positioned so that its second lower surface 56 aligns with the first lower surface 36 of the main member 30. The second auxiliary member 60 is positioned so that its third lower surface 66 aligns with the first lower surface 36 of the main member 30.

[0091] The length L2 of the first auxiliary member 50 is equal to the length L3 of the second auxiliary member 60 in the longitudinal direction A1. The width W3 of the second auxiliary member 60 in the width direction A2 is equal to the width W1 of the main member 30 and the width W2 of the first auxiliary member 50. The height H3 of the second auxiliary member 60 in the height direction A3 is less than the height H1 of the main member 30 and equal to the height H2 of the first auxiliary member 50. In other words, the cross-sectional area of ​​the second auxiliary member 60 is less than the cross-sectional area of ​​the main member 30 and equal to the cross-sectional area of ​​the first auxiliary member 50.

[0092] As shown in Figure 6, the lower surface 5 of the flooring material 3 is positioned above the first auxiliary material 50 so as to contact the second upper surface 55 of the first auxiliary material 50. The lower surface 5 of the flooring material 3 is positioned above the second auxiliary material 60 so as to contact the third upper surface 65 of the second auxiliary material 60. Since the position of the first upper surface 35 of the main material 30 coincides with the position of the upper surface 4 of the flooring material 3, the dimensions of the main material 30 in the space between the lower end of the floor slab of the upper floor and the ceiling can be suppressed.

[0093] In this embodiment, the connecting member 70 is inserted in the width direction A2 of the horizontal member 20 so as to span the main member 30, the first auxiliary member 50, and the second auxiliary member 60. The first auxiliary member 50 and the second auxiliary member 60 are joined to the main member 30 by the connecting member 70 so as to be movable or rotatable. In this case, the movement is slight, and the rotation is slight.

[0094] The main member 30, the first auxiliary member 50, and the second auxiliary member 60 are pin-jointed by a plurality of drift pins 71. The drift pins 71 are inserted into the main member 30, the first auxiliary member 50, and the second auxiliary member 60 such that the friction portion 71X engages with only one of the main member 30, the first auxiliary member 50, and the second auxiliary member 60. Therefore, with respect to the drift pins 71, the other two of the main member 30, the first auxiliary member 50, and the second auxiliary member 60 are more easily rotated and moved than the one with which the friction portion 71X engages. The connecting member 70 may include screws.

[0095] The second auxiliary member 60 is provided with a plurality of third holes 67 into which drift pins 71 are inserted. The plurality of third holes 67 are provided in the second auxiliary member 60 so that one group of drift pins 71 can be inserted in the height direction A3. The plurality of third holes 67 are provided in the second auxiliary member 60 at intervals of 1 m or more in the longitudinal direction A1. The number of third holes 67 is set to match the number of drift pins 71. The third holes 67 of the second auxiliary member 60 are provided in the second auxiliary member 60 so as to correspond to the first holes 37 of the main member 30 and the second holes 57 of the first auxiliary member 50.

[0096] <Effects of the second embodiment> (2-1) The horizontal member 20 further comprises a second auxiliary member 60 as an auxiliary member 40. The second auxiliary member 60 comprises a fifth side surface 63 and a sixth side surface 64 opposite to the fifth side surface 63. The second auxiliary member 60 is positioned such that the fifth side surface 63 is in contact with the second side surface 34.

[0097] With this configuration, the fifth side surface 63 of the second auxiliary material 60 comes into contact with the second side surface 34 of the main material 30, so that the vibration of the main material 30 can be effectively dampened by the second auxiliary material 60.

[0098] <Example of changes> Each embodiment is an example of the possible configurations of the horizontal members 20 of building 1 and building 1. Each embodiment is not intended to limit the possible configurations of the horizontal members 20 of building 1 and building 1. The horizontal members 20 of building 1 and building 1 may take configurations different from those exemplified in each embodiment. Configurations different from those exemplified in each embodiment include, for example, configurations in which parts of the configuration of each embodiment are replaced, modified, or omitted, or configurations in which new configurations are added to each embodiment. Examples of modifications to each embodiment are shown below.

[0099] If the natural frequencies of the main member 30 and the auxiliary member 40 are different, the length, width, and height of the auxiliary member 40 can be changed as appropriate. Also, the arrangement of the auxiliary member 40 can be changed as appropriate, as long as it is in contact with the first side surface 33 or the second side surface 34 of the main member 30. Below, with reference to Figures 7 to 15, examples of changes to the auxiliary member 40 having various lengths, widths, and heights will be illustrated.

[0100] As shown in Figure 7, the length L2 of the first auxiliary member 50 may be equal to the length L1 of the main member 30, the width W2 of the first auxiliary member 50 may be different from the width W1 of the main member 30, and the height H2 of the first auxiliary member 50 may be equal to the height H1 of the main member 30. In Figure 7, an example is shown in which the width W2 of the first auxiliary member 50 is greater than the width W1 of the main member 30.

[0101] As shown in Figure 8, the length L2 of the first auxiliary member 50 may be different from the length L1 of the main member 30, the width W2 of the first auxiliary member 50 may be equal to the width W1 of the main member 30, and the height H2 of the first auxiliary member 50 may be equal to the height H1 of the main member 30. In Figure 8, an example is shown in which the length L2 of the first auxiliary member 50 is shorter than the length L1 of the main member 30. In this modified example, only the third end 51 of the first auxiliary member 50 is fixed to the first shaft member 11 with a connecting fitting, or only the fourth end 52 of the first auxiliary member 50 is fixed to the second shaft member 12 with a connecting fitting.

[0102] As shown in Figure 9, the length L2 of the first auxiliary member 50 may be equal to the length L1 of the main member 30, the width W2 of the first auxiliary member 50 may be different from the width W1 of the main member 30, and the height H2 of the first auxiliary member 50 may be different from the height H1 of the main member 30. In Figure 9, an example is shown in which the width W2 of the first auxiliary member 50 is greater than the width W1 of the main member 30, and the height H2 of the first auxiliary member 50 is smaller than the height H1 of the main member 30. In this modified example, only the second upper surface 55 of the first auxiliary member 50 is positioned at the same location as the first upper surface 35 of the main member 30, or only the second lower surface 56 of the first auxiliary member 50 is positioned at the same location as the first lower surface 36 of the main member 30.

[0103] As shown in Figure 10, the length L2 of the first auxiliary member 50 may differ from the length L1 of the main member 30, the width W2 of the first auxiliary member 50 may differ from the width W1 of the main member 30, and the height H2 of the first auxiliary member 50 may be equal to the height H1 of the main member 30. In Figure 10, an example is shown in which the length L2 of the first auxiliary member 50 is shorter than the length L1 of the main member 30, and the width W2 of the first auxiliary member 50 is greater than the width W1 of the main member 30. In this modified example, only the third end 51 of the first auxiliary member 50 is fixed to the first shaft member 11 with a connecting fitting, or only the fourth end 52 of the first auxiliary member 50 is fixed to the second shaft member 12 with a connecting fitting.

[0104] As shown in Figure 11, the length L2 of the first auxiliary member 50 may differ from the length L1 of the main member 30, the width W2 of the first auxiliary member 50 may be equal to the width W1 of the main member 30, and the height H2 of the first auxiliary member 50 may differ from the height H1 of the main member 30. Figure 11 shows an example in which the length L2 of the first auxiliary member 50 is shorter than the length L1 of the main member 30, and the height H2 of the first auxiliary member 50 is smaller than the height H1 of the main member 30. In this modified example, only the third end 51 of the first auxiliary member 50 is fixed to the first shaft member 11 with a connecting fitting, or only the fourth end 52 of the first auxiliary member 50 is fixed to the second shaft member 12 with a connecting fitting. In this modified example, only the second upper surface 55 of the first auxiliary member 50 is positioned at the same location as the first upper surface 35 of the main member 30, or only the second lower surface 56 of the first auxiliary member 50 is positioned at the same location as the first lower surface 36 of the main member 30.

[0105] As shown in Figure 12, the length L2, width W2, and height H2 of the first auxiliary member 50 may differ from the length L1, width W1, and height H1 of the main member 30. Figure 12 shows an example in which the length L2 of the first auxiliary member 50 is shorter than the length L1 of the main member 30, the width W2 of the first auxiliary member 50 is greater than the width W1 of the main member 30, and the height H2 of the first auxiliary member 50 is smaller than the height H1 of the main member 30. In this modified example, only the third end 51 of the first auxiliary member 50 is fixed to the first shaft member 11 with a connecting fitting, or only the fourth end 52 of the first auxiliary member 50 is fixed to the second shaft member 12 with a connecting fitting. In this modified example, only the second upper surface 55 of the first auxiliary member 50 is positioned at the same location as the first upper surface 35 of the main member 30, or only the second lower surface 56 of the first auxiliary member 50 is positioned at the same location as the first lower surface 36 of the main member 30.

[0106] As shown in Figure 13, the sixth side surface 64 of the second auxiliary member 60 may be positioned in contact with the third side surface 53 of the first auxiliary member 50. The length L2 of the first auxiliary member 50 and the length L3 of the second auxiliary member 60 are equal to the length L1 of the main member 30. The width W2 of the first auxiliary member 50 and the width W3 of the second auxiliary member 60 are equal to the width W1 of the main member 30. The height H1 of the main member 30 is greater than the height H2 of the first auxiliary member 50 and the height H3 of the second auxiliary member 60. The height H2 of the first auxiliary member 50 is less than the height H1 of the main member 30 and greater than the height H3 of the second auxiliary member 60. The height H3 of the second auxiliary member 60 is less than the height H1 of the main member 30 and the height H2 of the first auxiliary member 50. The second top surface 55 of the first auxiliary member 50 and the third top surface 65 of the second auxiliary member 60 are positioned at the same location as the first top surface 35 of the main member 30. The second lower surface 56 of the first auxiliary material 50 and the third lower surface 66 of the second auxiliary material 60 may be positioned in the same location as the first lower surface 36 of the main material 30.

[0107] As shown in Figure 14, the fourth side surface 54 of the first auxiliary material 50 and the sixth side surface 64 of the second auxiliary material 60 may be in contact with the first side surface 33 of the main material 30, and the first auxiliary material 50 and the second auxiliary material 60 may be arranged so as to be aligned in the height direction A3. The length L2 of the first auxiliary material 50 and the length L3 of the second auxiliary material 60 are equal to the length L1 of the main material 30. The width W2 of the first auxiliary material 50 and the width W3 of the second auxiliary material 60 are equal to the width W1 of the main material 30. The height H2 of the first auxiliary material 50 is less than the height H1 of the main material 30 and equal to the height H3 of the second auxiliary material 60. The second upper surface 55 of the first auxiliary material 50 is positioned at the same location as the first upper surface 35 of the main material 30. The third lower surface 66 of the second auxiliary material 60 is positioned at the same location as the first lower surface 36 of the main material 30.

[0108] As shown in Figure 15, the fourth side surface 54 of the first auxiliary member 50 and the sixth side surface 64 of the second auxiliary member 60 may be in contact with the first side surface 33 of the main member 30, and the first auxiliary member 50 and the second auxiliary member 60 may be arranged side by side in the longitudinal direction A1. The third end 51 of the first auxiliary member 50 is fixed to the first shaft member 11. The sixth end 62 of the second auxiliary member 60 is fixed to the second shaft member 12. The length L2 of the first auxiliary member 50 and the length L3 of the second auxiliary member 60 are shorter than the length L1 of the main member 30. The length L2 of the first auxiliary member 50 may be equal to or different from the length L3 of the second auxiliary member 60. The width W2 of the first auxiliary member 50 and the width W3 of the second auxiliary member 60 are equal to the width W1 of the main member 30. The height H2 of the first auxiliary member 50 and the height H3 of the second auxiliary member 60 are equal to the height H1 of the main member 30.

[0109] The second auxiliary member 60 may be configured as the first auxiliary member 50 in the modified example shown in Figures 7 to 12 above. In this modified example, the second auxiliary member 60, configured as in the modified example shown in Figures 7 to 12 above, is placed in place of or in addition to the first auxiliary member 50 so as to contact the first side surface 33 or the second side surface 34 of the main member 30. In this modified example, if the length L3 of the second auxiliary member 60 is shorter than the length L1 of the main member 30, only the fifth end 61 of the second auxiliary member 60 is fixed to the first shaft member 11 with a connecting fitting, or only the sixth end 62 of the second auxiliary member 60 is fixed to the second shaft member 12 with a connecting fitting.

[0110] The main member 30 may be fixed to the support column 16 with connecting hardware. The main member 30 may be supported by the support column 16 so as to be slightly rotatable and slightly movable relative to the support column 16.

[0111] The main member 30 may be fixed to the first shaft member 11 only with connecting hardware. For example, the first end 31 of the main member 30 may be fixed to the first shaft member 11, while the second end 32 of the main member 30 may not be supported or fixed to the second shaft member 12. If the first end 31 of the main member 30 is fixed to the first shaft member 11 only with connecting hardware, the second shaft member 12 may be omitted.

[0112] The main member 30 may be fixed to the second shaft member 12 only with connecting hardware. For example, the first end 31 of the main member 30 is not supported and fixed to the first shaft member 11, and the second end 32 of the main member 30 is fixed to the second shaft member 12. If the second end 32 of the main member 30 is fixed to the second shaft member 12 only with connecting hardware, the first shaft member 11 may be omitted.

[0113] The first auxiliary member 50 may be fixed to the support column 16 with connecting hardware. The first auxiliary member 50 may be supported by the support column 16 so as to be slightly rotatable and slightly movable relative to the support column 16.

[0114] The first auxiliary member 50 may be fixed to the first shaft member 11 only with connecting hardware. For example, the third end 51 of the first auxiliary member 50 may be fixed to the first shaft member 11, and the fourth end 52 of the first auxiliary member 50 may not be supported or fixed to the second shaft member 12. If the third end 51 of the first auxiliary member 50 is fixed to the first shaft member 11 only with connecting hardware, the second shaft member 12 may be omitted.

[0115] The first auxiliary member 50 may be fixed to the second shaft member 12 only with connecting hardware. For example, the third end 51 of the first auxiliary member 50 is not supported and fixed to the first shaft member 11, and the fourth end 52 of the first auxiliary member 50 is fixed to the second shaft member 12. If the fourth end 52 of the first auxiliary member 50 is fixed to the second shaft member 12 only with connecting hardware, the first shaft member 11 may be omitted.

[0116] The second auxiliary member 60 may be fixed to the support column 16 with connecting hardware. The second auxiliary member 60 may be supported by the support column 16 so as to be slightly rotatable and slightly movable relative to the support column 16.

[0117] The second auxiliary member 60 may be fixed to the first shaft member 11 only with connecting hardware. For example, the fifth end 61 of the second auxiliary member 60 may be fixed to the first shaft member 11, and the sixth end 62 of the second auxiliary member 60 may not be supported or fixed to the second shaft member 12. If the fifth end 61 of the second auxiliary member 60 is fixed to the first shaft member 11 only with connecting hardware, the second shaft member 12 may be omitted.

[0118] The second auxiliary member 60 may be fixed to the second shaft member 12 only with connecting hardware. For example, the fifth end 61 of the second auxiliary member 60 is not supported and fixed to the first shaft member 11, and the sixth end 62 of the second auxiliary member 60 is fixed to the second shaft member 12. If the sixth end 62 of the second auxiliary member 60 is fixed to the second shaft member 12 only with connecting hardware, the first shaft member 11 may be omitted.

[0119] The horizontal member 20 may further include at least one auxiliary member different from the first auxiliary member 50 and the second auxiliary member 60. In this case, the first auxiliary member 50, the second auxiliary member 60, and at least one auxiliary member are attached to the first side 33 or the second side 34 of the main member 30.

[0120] The flooring material 3 may be supported by a part of the frame 10 via floor support members. Floor support members are also called joists.

[0121] The ordinal numbers such as "first, second, and third" used in this specification are simply used to distinguish between multiple members having the same name and do not have any special meaning.

[0122] This specification discloses the following technologies: [Note 1] The horizontal structural member of the building described in Appendix 1 is a horizontal structural member that supports the floor of the building, comprising a main member and an auxiliary member arranged on the side surface of the main member, wherein the auxiliary member is joined to the main member by a flexible joining means, the cross-sectional dimensions of the main member differ from the cross-sectional dimensions of the auxiliary member, or the length of the main member in the longitudinal direction of the horizontal structural member differs from the length of the auxiliary member in the longitudinal direction.

[0123] [Note 2] In the horizontal member described in Appendix 1, the flexible joining means includes a plurality of connecting members, and the connecting members are inserted in the width direction of the horizontal member so as to extend from the main member to the auxiliary member.

[0124] [Note 3] In the horizontal member described in Appendix 2, the multiple connecting members are attached to the main member and the auxiliary member at intervals of 1 m or more in the longitudinal direction.

[0125] [Note 4] In the horizontal member described in Appendix 3, the connecting member includes drift pins, and the main member and the auxiliary member are pin-joined by a plurality of the drift pins.

[0126] [Note 5] In the horizontal member described in Appendix 1, the length of the auxiliary member in the longitudinal direction is equal to the length of the main member in the longitudinal direction, and the height of the auxiliary member in the height direction of the horizontal member is less than the height of the main member in the height direction.

[0127] [Note 6] In the horizontal member described in Appendix 1, the main member has a first end and a second end opposite to the first end in the longitudinal direction, and the auxiliary member has a third end and a fourth end opposite to the third end in the longitudinal direction, and in the longitudinal direction, the first end of the main member is in the same position as the third end of the auxiliary member.

[0128] [Note 7] In the horizontal member described in Appendix 6, the second end of the main member is in the same position as the fourth end of the auxiliary member in the longitudinal direction.

[0129] [Note 8] In the horizontal member described in Appendix 1, a first auxiliary member is provided as an auxiliary member, the main member has a first side surface and a second side surface opposite to the first side surface, the first auxiliary member has a third side surface and a fourth side surface opposite to the third side surface, and the first auxiliary member is arranged such that the fourth side surface of the first auxiliary member is in contact with the first side surface of the main member.

[0130] [Note 9] In the horizontal member described in Appendix 8, a second auxiliary member is further provided as an auxiliary member, the second auxiliary member having a fifth side surface and a sixth side surface opposite to the fifth side surface, and the second auxiliary member is arranged such that the fifth side surface of the second auxiliary member is in contact with the second side surface of the main member.

[0131] [Note 10] In the horizontal members described in Appendix 1, the main members and auxiliary members are made of wood.

[0132] [Note 11] The building in Appendix 11 is a building comprising a frame, the frame having a horizontal member as described in any one of Appendix 1 to 10, and the horizontal member being supported at both ends in the longitudinal direction.

[0133] [Note 12] In the building described in Appendix 11, the frame includes a first axial member and a second axial member arranged at a distance from the first axial member in the longitudinal direction, the first end of the main member being fixed to the first axial member, the second end of the main member being fixed to the second axial member, the third end of the auxiliary member being fixed to the first axial member, and the fourth end of the auxiliary member being fixed to the second axial member. [Explanation of Symbols]

[0134] 1...Building, 2...Floor, 10...Structural frame, 11...First axis member, 12...Second axis member, 20...Horizontal member, 30...Main member, 31...First end, 32...Second end, 33...First side, 34...Second side, 40...Auxiliary member, 50...First auxiliary member, 51...Third end, 52...Fourth end, 53...Third side, 54...Fourth side, 60...Second auxiliary member, 63...Fifth side, 64...Sixth side, 70...Connecting member, 71...Drift pin.

Claims

1. A horizontal member that supports the floor of a building, Main material and, The main material comprises an auxiliary material positioned on the side surface of the main material, The auxiliary material is joined to the main material by a flexible joining means. The cross-sectional dimensions of the main member differ from the cross-sectional dimensions of the auxiliary member, or the length of the main member in the longitudinal direction of the horizontal member differs from the length of the auxiliary member in the longitudinal direction. The flexible joining means is a joining means that allows the auxiliary material to move and change angle relative to the main material, The flexible joining means includes a plurality of joining members, The connecting member is inserted in the width direction of the horizontal member so as to extend from the main member to the auxiliary member. Multiple connecting members are attached to the main material and the auxiliary material at intervals of 1 m or more in the longitudinal direction. Horizontal structural members.

2. The coupling member includes a drift pin, The main material and the auxiliary material are pin-jointed by a plurality of drift pins. The horizontal member according to claim 1.

3. The length of the auxiliary material in the longitudinal direction is equal to the length of the main material in the longitudinal direction. The height of the auxiliary member in the height direction of the horizontal member is smaller than the height of the main member in the height direction. The horizontal member according to claim 1.

4. The main material has a first end and a second end opposite to the first end in the longitudinal direction. The auxiliary member has a third end and a fourth end opposite to the third end in the longitudinal direction. In the longitudinal direction, the first end of the main material is in the same position as the third end of the auxiliary material. The horizontal member according to claim 1.

5. In the longitudinal direction, the second end of the main material is in the same position as the fourth end of the auxiliary material. The horizontal member according to claim 4.

6. A horizontal member that supports the floor of a building, Main material and, The main material comprises an auxiliary material positioned on the side surface of the main material, The auxiliary material is joined to the main material by a flexible joining means. The cross-sectional dimensions of the main member differ from the cross-sectional dimensions of the auxiliary member, or the length of the main member in the longitudinal direction of the horizontal member differs from the length of the auxiliary member in the longitudinal direction. The flexible joining means is a joining means that allows the auxiliary material to move and change angle relative to the main material, The first auxiliary material is provided as the aforementioned auxiliary material, The main material has a first side surface and a second side surface opposite to the first side surface. The first auxiliary member has a third side surface and a fourth side surface opposite to the third side surface. The first auxiliary material is positioned such that its fourth side contacts the first side of the main material. Horizontal structural members.

7. The system further comprises a second auxiliary material as the aforementioned auxiliary material, The second auxiliary member comprises a fifth side surface and a sixth side surface opposite to the fifth side surface, The second auxiliary material is positioned such that its fifth side contacts the second side of the main material. The horizontal member according to claim 6.

8. The main material and the auxiliary material are made of wood. The horizontal member according to claim 1.

9. It is a building, Equipped with a structural frame, The aforementioned structure has horizontal members that support the floor of the building, The aforementioned horizontal member is Main material and, The main material comprises an auxiliary material positioned on the side surface of the main material, The auxiliary material is joined to the main material by a flexible joining means. The cross-sectional dimensions of the main member differ from the cross-sectional dimensions of the auxiliary member, or the length of the main member in the longitudinal direction of the horizontal member differs from the length of the auxiliary member in the longitudinal direction. The flexible joining means is a joining means that allows the auxiliary material to move and change angle relative to the main material, The aforementioned horizontal member is supported at both ends in the longitudinal direction, The frame includes a first axial member and a second axial member that is spaced apart from the first axial member in the longitudinal direction. The first end of the main material is fixed to the first shaft member. The second end of the main member is fixed to the second shaft member. The third end of the auxiliary member is fixed to the first shaft member. The fourth end of the auxiliary member is fixed to the second shaft member. architecture.

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