Horizontal member for building, and building

Abstract

A horizontal member (20) comprises a main member (30) and an auxiliary member (40) disposed on a side surface of the main member (30). The auxiliary member (40) is joined to the main member (30) via a flexible joining means. A cross-sectional dimension of the main member (30) differs from a cross-sectional dimension of the auxiliary member (40), or the length (L1) of the main member (30) in the longitudinal direction (A1) of the horizontal member (20) differs from the length (L2) of the auxiliary member (40) in the longitudinal direction (A1).

Description

Building horizontal members and a building

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

[0002] A method of suppressing floor vibration is known by preventing the natural frequencies of each structural member 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 are arranged at intervals so that the natural frequencies of each structural member of a building do not concentrate on a specific frequency.

[0003] Japanese Patent Application Laid-Open No. 11-270022

[0004] In a method such as that of Patent Document 1, beams of various sizes are required, which may increase costs and construction effort. Therefore, there is room for consideration in the horizontal members for suppressing floor vibration.

[0005] (1) A building horizontal member according to one aspect of the present disclosure is a horizontal member that supports a 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] According to this configuration, the main member and the auxiliary member having different cross-sectional dimensions or lengths in the longitudinal direction are disposed on the side surface of the main member by flexible joining means. Therefore, since the main member and the auxiliary member have different natural frequencies, they cancel out each other's vibrations, and the vibrations are attenuated, so that the floor vibration can be suitably suppressed.

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

[0008] With this configuration, the connecting members are inserted so as to extend across the main member and the auxiliary member, allowing the main member and the auxiliary member to cancel each other's vibrations. (3) In the horizontal member of (2) above, the plurality of connecting members are attached to the main member and the auxiliary member at intervals of 1 m or more in the longitudinal direction.

[0009] 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.

[0010] (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 drift pins. With this configuration, by pin-jointing with a plurality of drift pins, the auxiliary member can be suitably joined to the side surface of the main member in such a way that the vibrations of the main member and the auxiliary member cancel each other out.

[0011] (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.

[0012] 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.

[0013] (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.

[0014] 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.

[0015] (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. 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 by the two members that support the horizontal member at the second end of the main member and the fourth end of the auxiliary member.

[0016] (8) In any one of the horizontal members described in (1) to (7) above, a first auxiliary member is provided as an auxiliary member, wherein 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.

[0017] With this configuration, the fourth side surface of the first auxiliary member is in contact with the first side surface of the main member, so that the vibration of the main member can be suitably dampened by the first auxiliary member. (9) The horizontal member of (8) above is further provided with a second auxiliary member as the 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 so that the fifth side surface of the second auxiliary member is in contact with the second side surface of the main member.

[0018] With this configuration, the fifth side surface of the second auxiliary material comes into contact with the second side surface of the main material, so that the vibration of the main material can be suitably dampened by the second auxiliary material. (10) In any one of the horizontal members described in (1) to (9) above, the main material and the auxiliary material are made of wood. With this configuration, the vibration of the floor can be suitably suppressed by the main material and auxiliary material made of wood.

[0019] (11) A building according to one aspect of the present disclosure is a building comprising a frame, the frame having one of the horizontal members described in (1) to (10) above, the horizontal member being supported at both ends in the longitudinal direction.

[0020] With this configuration, since the frame has the above-mentioned horizontal members, vibrations of the part of the building supported by the horizontal members with both ends supported can be suppressed. (12) In the building described in (11) above, 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 is fixed to the first axial member, the second end of the main member is fixed to the second axial member, the third end of the auxiliary member is fixed to the first axial member, and the fourth end of the auxiliary member is fixed to the second axial member.

[0021] With this configuration, since the structural frame has the aforementioned horizontal members, vibrations in the parts of the building supported by horizontal members fixed at both ends can be suppressed.

[0022] According to the horizontal structural members and building structures of this disclosure, floor vibrations can be effectively suppressed.

[0023] This is a front view showing the entire building of the first embodiment. This is a plan view showing the floor of the building in Figure 1. This is a perspective view of the horizontal member in Figure 2. This is a cross-sectional view along the line D4-D4 in Figure 2. This is a perspective view of the horizontal member of the second embodiment. This is a cross-sectional view of the horizontal member in Figure 5. This is a perspective view of the horizontal member of the first modified example. This is a perspective view of the horizontal member of the second modified example. This is a perspective view of the horizontal member of the third modified example. This is a perspective view of the horizontal member of the fourth modified example. This is a perspective view of the horizontal member of the fifth modified example. This is a perspective view of the horizontal member of the sixth modified example. This is a perspective view of the horizontal member of the seventh modified example. This is a perspective view of the horizontal member of the eighth modified example. This is a perspective view of the horizontal member of the ninth modified example.

[0024] (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.

[0025] 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 the longitudinal direction A1 and the width direction A2 is defined as the height direction A3 of the horizontal member 20.

[0026] As shown in Figures 1 and 2, each floor of the building 1 has a floor 2. The floor 2 is located, for example, on the living floor of the building 1. In this embodiment, the floor 2 is described as the floor of the second floor of the building 1. The floor 2 may constitute the floor of the first floor, or the floor of the third floor or higher. In some countries such as the United Kingdom and Australia, "first floor" and "second floor" in this specification may be read as "ground floor" and "first floor" respectively. The floor 2 is composed 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.

[0027] <Skeleton 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.

[0028] 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.

[0029] 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. In the width direction A2, the third axial member 13 is spaced apart from the fourth axial member 14. The third axial member 13 and the fourth axial member 14 support the floor material 3.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] <Horizontal 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.

[0034] 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.

[0035] 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 main member 30 in its function as a component of the structural frame 10.

[0036] 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 axial member 15. The length L1 of the main member 30 is, for example, 7 m or more.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] The horizontal frame member 20 includes a first auxiliary member 50 as the 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 portion 51 and a fourth end portion 52 opposite to the third end portion 51 in the longitudinal direction A1. In the longitudinal direction A1, the first end portion 31 of the main member 30 is at the same position as the third end portion 51 of the auxiliary member 40. In the longitudinal direction A1, the second end portion 32 of the main member 30 is at the same position as the fourth end portion 52 of the auxiliary member 40.

[0041] The third end portion 51 of the auxiliary member 40 is supported by the first shaft member 11. In this embodiment, the third end portion 51 of the auxiliary member 40 is fixed to the first shaft member 11. In one example, the third end portion 51 of the auxiliary member 40 is fixed to the first shaft member 11 with a connecting fitting.

[0042] The third end portion 51 of the auxiliary member 40 may be simply supported by the first shaft member 11. The state in which the third end portion 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 portion 51 of the auxiliary member 40 is supported by the first shaft member 11 so as to be rotatable and movable. In this case, the movement is a slight movement. The rotation is a slight rotation.

[0043] The fourth end portion 52 of the auxiliary member 40 is supported by the second shaft member 12. In this embodiment, the fourth end portion 52 of the auxiliary member 40 is fixed to the second shaft member 12. In one example, the fourth end portion 52 of the auxiliary member 40 is fixed to the second shaft member 12 with a connecting fitting. [[ID=!!]]

[0044] The fourth end portion 52 of the auxiliary member 40 may be simply supported by the second shaft member 12. The state in which the fourth end portion 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 portion 52 of the auxiliary member 40 is supported by the second shaft member 12 so as to be rotatable and movable. In this case, the movement is a slight movement. The rotation is a slight rotation.

[0045] The cross-sectional dimension of the main material 30 is different from that of the auxiliary material 40, or the length L1 of the main material 30 in the longitudinal direction A1 is different from the length of the auxiliary material 40 in the longitudinal direction A1. In other words, the cross-sectional area of the main material 30 is different from that of the auxiliary material 40, or the length L1 of the main material 30 in the longitudinal direction A1 is different from the length of the auxiliary material 40 in the longitudinal direction A1. Therefore, the main material 30 has a natural frequency different from that of the auxiliary material 40. In this embodiment, the length of the auxiliary material 40 will be described as the length L2 of the first auxiliary material 50.

[0046] As shown in FIG. 3, in this embodiment, the length L2 of the first auxiliary material 50 in the longitudinal direction A1 is equal to the length L1 of the main material 30 in the longitudinal direction A1. The width W2 of the auxiliary material 40 in the width direction A2 is equal to the width W1 of the main material 30. The height H2 of the auxiliary material 40 in the height direction A3 is smaller than the height H1 of the main material 30 in the height direction A3. In other words, the cross-sectional area of the auxiliary material 40 is smaller than that of the main material 30.

[0047] 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 arranged such that the fourth side surface 54 of the first auxiliary material 50 contacts the first side surface 33 of the main material 30.

[0048] In the height direction A3, the main material 30 has a first upper surface 35 and a first lower surface 36 opposite to the first upper surface 35. The first auxiliary material 50 has a second upper surface 55 and a second lower surface 56 opposite to the second upper surface 55. The first auxiliary material 50 is arranged such that the second upper surface 55 of the first auxiliary material 50 aligns with the first upper surface 35 of the main material 30.

[0049] <Flexible joining means> The auxiliary material 40 is joined to the main material 30 by flexible joining means. The flexible joining means is, for example, a joining means that allows movement and angular change of the auxiliary material 40 with respect to the main material 30. There is a slight gap between the main material 30 and the auxiliary material 40.

[0050] 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. 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.

[0051] 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.

[0052] In the height direction A3, a group of connecting members 70 attached to the main member 30 and the auxiliary member 40 is considered 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 the auxiliary member 40 at equal intervals with a distance of 1 m or more between them 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.

[0053] 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 pins 71 are 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.

[0054] The main material 30 is provided with a plurality of first holes 37 into which drift pins 71 are inserted. The plurality of 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 plurality of 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.

[0055] 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.

[0056] <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 vibration is dampened, thereby effectively suppressing the vibration of the floor 2.

[0057] <Effects of the First Embodiment> The effects of the first embodiment will be described. (1-1) A horizontal member 20 that supports the floor 2 of a building 1, comprising a main member 30 and an auxiliary member 40 arranged 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.

[0058] 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.

[0059] (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. With this configuration, the main member 30 and the auxiliary member 40 can cancel out each other's vibrations by being inserted so as to span the main member 30 and the auxiliary member 40.

[0060] (1-3) 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. 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 member 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 member 40 effectively cancel each other out in vibration, compared to the case where they are arranged at intervals of less than 1 m.

[0061] (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. With this configuration, by pin-jointing with a plurality of drift pins 71, the auxiliary member 40 can be suitably joined to the side surface of the main member 30 in such a way that the vibrations of the main member 30 and the auxiliary member 40 cancel each other out.

[0062] (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.

[0063] 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.

[0064] (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.

[0065] 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.

[0066] (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. 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.

[0067] (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.

[0068] 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 suitably dampened by the first auxiliary material 50. (1-9) The main material 30 and the auxiliary material 40 are made of wood. With this configuration, the vibration of the floor 2 can be suitably suppressed by the main material 30 and the auxiliary material 40, which are made of wood.

[0069] (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.

[0070] (1-11) The frame 10 includes a first shaft member 11 and a second shaft member 12 which is spaced apart 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.

[0071] 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.

[0072] (Second Embodiment) The horizontal members 20 of the building 1 and the building 1 according to the second embodiment will be described with reference to Figures 5 and 6. In this embodiment, components common to the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description of redundant components is omitted.

[0073] 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.

[0074] 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.

[0075] 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 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.

[0076] 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.

[0077] 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 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] <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 arranged such that the fifth side surface 63 is in contact with the second side surface 34.

[0086] With this configuration, the fifth side surface 63 of the second auxiliary member 60 contacts the second side surface 34 of the main member 30, so that the vibration of the main member 30 can be suitably dampened by the second auxiliary member 60. <Examples of Modifications> Each embodiment is an example of the form that the horizontal members 20 of the building 1 and the building 1 can take. Each embodiment is not intended to limit the form that the horizontal members 20 of the building 1 and the building 1 can take. The horizontal members 20 of the building 1 and the building 1 can take a form different from the form exemplified in each embodiment. A form different from the form exemplified in each embodiment is, for example, a form in which a part of the configuration of each embodiment is replaced, changed, or omitted, or a form in which a new configuration is added to each embodiment. Examples of modifications to each embodiment are shown below.

[0087] - If the natural frequencies of the main material 30 and the auxiliary material 40 are different, the length, width, and height of the auxiliary material 40 can be changed as appropriate. Also, the arrangement of the auxiliary material 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 material 30. Below, with reference to Figures 7 to 15, examples of changes to the auxiliary material 40 having various lengths, widths, and heights will be illustrated.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] As shown in Figure 11, 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 different 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.

[0093] 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.

[0094] 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 upper surface 55 of the first auxiliary member 50 and the third upper surface 65 of the second auxiliary member 60 are positioned at the same location as the first upper 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.

[0095] 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 side by side 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.

[0096] 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.

[0097] - 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.

[0098] 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.

[0099] 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.

[0100] - 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.

[0101] 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.

[0102] - 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.

[0103] - 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.

[0104] 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.

[0105] - 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.

[0106] - 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.

[0107] 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 surface 33 or the second side surface 34 of the main member 30.

[0108] - 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. The ordinal numbers such as "first, second, and third" used in this specification are simply used to distinguish multiple members having the same name and do not have any special meaning.

[0109] This specification discloses the following technology: [Appendix 1] The horizontal member of a building according to Appendix 1 is a horizontal member that supports the floor of a building, comprising a main member and an auxiliary member disposed 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 are different from the cross-sectional dimensions 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.

[0110] [Note 2] In the horizontal member described in Note 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.

[0111] [Note 3] In the horizontal member described in Note 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.

[0112] [Note 4] In the horizontal member described in Note 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.

[0113] [Note 5] In the horizontal member described in Note 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.

[0114] [Note 6] In the horizontal member described in Note 1, the main member 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, 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.

[0115] [Note 7] In the horizontal member described in Note 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.

[0116] [Note 8] In the horizontal member described in Note 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.

[0117] [Note 9] In the horizontal member described in Note 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.

[0118] [Note 10] In the horizontal members described in Note 1, the main members and auxiliary members are made of wood.

[0119] [Note 11] The building in Note 11 is a building comprising a frame, the frame having a horizontal member as described in any one of Notes 1 to 10, and the horizontal member being supported at both ends in the longitudinal direction.

[0120] [Note 12] In the building described in Note 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.

[0121] 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 for supporting the floor of a building, comprising a main member and an auxiliary member disposed 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 member differs from the length of the auxiliary member in the longitudinal direction.

2. The horizontal member according to claim 1, wherein 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.

3. The horizontal member according to claim 2, wherein the plurality of connecting members are attached to the main member and the auxiliary member at intervals of 1 m or more in the longitudinal direction.

4. The connecting member includes drift pins, and the main member and the auxiliary member are pin-jointed by a plurality of the drift pins, as described in claim 3.

5. The horizontal member according to any one of claims 1 to 4, wherein 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.

6. The horizontal member according to any one of claims 1 to 5, wherein the main member 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, 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.

7. The horizontal member according to claim 6, wherein in the longitudinal direction, the second end of the main member is in the same position as the fourth end of the auxiliary member.

8. A horizontal member according to any one of claims 1 to 7, comprising a first auxiliary member as an auxiliary member, wherein 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.

9. The horizontal member according to claim 8, further comprising a second auxiliary member as an auxiliary member, wherein the second auxiliary member comprises 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 contacts the second side surface of the main member.

10. The horizontal member according to any one of claims 1 to 9, wherein the main member and the auxiliary member are made of wood.

11. A building comprising a frame, the frame having a horizontal member as described in any one of claims 1 to 10, the horizontal member being supported at both ends in the longitudinal direction.

12. The building according to claim 11, wherein the frame includes a first axial member and a second axial member disposed at a distance from the first axial member in the longitudinal direction, the first end of the main member is fixed to the first axial member, the second end of the main member is fixed to the second axial member, the third end of the auxiliary member is fixed to the first axial member, and the fourth end of the auxiliary member is fixed to the second axial member.

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