building

Abstract

To provide an architectural structure having wooden roof support structures capable of supporting a load of a roof of a long span architectural structure at low cost.SOLUTION: An architectural structure 1 has a first wall 2, a second wall 3, wooden roof support structures 4 disposed between the first wall 2 and the second wall 3, and a roof 5 supported by the roof support structures 4. The roof support structure 4 has wooden truss bodies 11 to 14 that have upper chords 11a, 13a, lower chords 11b, 13b connected to the upper chords 11a, 13a at distal ends, and a binding material 11c for connecting the upper chords 11a, 13a and the lower chords 11b, 13b, respectively. A plurality of laminated veneer lumbers 30 to 32, which are connected in longer direction at joint parts J1 to J3 and laminated so that the joint parts J1 to J3 are displaced from each other in the longer direction, and integrated by stitching materials 33, are used as the upper chords 11a, 13a, and the lower chords 11b, 13b in the architectural structure 1.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a building having a wooden roof support structure.

Background Art

[0002] In recent years, in order to promote the use of wood, the spread of wooden buildings has been demanded.

[0003] For example, Patent Document 1 describes a building that employs a wooden roof support structure as a roof support structure provided between a pair of walls to support a roof.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The wooden roof support structure has come to be adopted even in long-span buildings that require a large column-free space such as warehouses and factories.

[0006] However, the above-described conventional wooden roof support structure has a problem in that its structure becomes complicated and the cost of the building increases because it is necessary to use hardware such as a metal plate at the connecting portion of each member in order to support the load of the roof in a long-span building.

[0007] The present invention has been made in view of such problems, and an object thereof is to provide at low cost a building provided with a wooden roof support structure capable of supporting the load of a roof in a long-span building.

Means for Solving the Problems

[0008] The present invention relates to a building having a first wall, a second wall, a wooden roof support structure provided between the first wall and the second wall, and a roof supported by the roof support structure, wherein the roof support structure has a wooden truss body comprising an upper chord, a lower chord connected to the upper chord at its tip, and a purlin connecting the upper chord and the lower chord, and the upper chord and the lower chord are made of multiple laminated veneers that are connected longitudinally at joint portions and laminated with the joint portions offset longitudinally from each other, and are integrated with a binding material.

[0009] In the building structure of the present invention, it is preferable that the fastening material is a plurality of screws that penetrate a plurality of the laminated veneer materials. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a building equipped with a wooden roof support structure capable of supporting the roof load in long-span buildings at a low cost. [Brief explanation of the drawing]

[0011] [Figure 1] This is a cross-sectional view of a building relating to one embodiment of the present invention. [Figure 2] This diagram shows the arrangement of trusses in the roof support structure shown in Figure 1. [Figure 3] This figure shows an enlarged view of one side of the truss body of the roof support structure shown in Figure 1. [Figure 4] This figure shows an enlarged view of the other truss body of the roof support structure shown in Figure 1. [Figure 5] This is a magnified plan view of the connecting section at the tip of the four truss bodies. [Figure 6] This is a cross-sectional view along line AA in Figure 5. [Figure 7] (a) is a plan view of the timber structural members that make up the upper and lower chords, (b) is a side view of the timber structural members shown in Figure (a), and (c) is a cross-sectional view of the timber structural members shown in Figure (a) perpendicular to the longitudinal direction. [Figure 8] It is a diagram showing four manufactured truss bodies. [Figure 9] It is a diagram showing a state where four truss bodies are arranged in an X shape between a first wall and a second wall. [Figure 10] It is a diagram showing a state where the tips of four truss bodies arranged in an X shape between a first wall and a second wall are connected by a joining material to form a roof support structure. [Figure 11] It is a diagram showing a divided state of a first truss half body and a second truss half body that form a truss body.

Embodiment for Carrying Out the Invention

[0012] Hereinafter, the building 1 according to an embodiment of the present invention will be exemplified and described in detail with reference to the drawings.

[0013] The building 1 shown in FIG. 1 has a first wall 2, a second wall 3, a wooden roof support structure 4, and a roof 5. The building 1 can be used, for example, as a warehouse or a factory, and has a column-free space 6 that extends between the first wall 2 and the second wall 3 and between the roof 5 and the floor 7.

[0014] The building 1 further has a pair of third walls 8 (only one is shown in FIG. 1) perpendicular to the first wall 2 and the second wall 3, and the column-free space 6 can also be configured to be surrounded and closed by the first wall 2, the second wall 3, and the pair of third walls 8 on all four sides.

[0015] The first wall 2 and the second wall 3 are arranged opposite to each other with a predetermined interval therebetween. The interval between the first wall 2 and the second wall 3 is, for example, a large span of about 28 m in order to form a wide column-free space 6.

[0016] In the present embodiment, the first wall 2 and the second wall 3 are each made of reinforced concrete (RC construction). By making the first wall 2 and the second wall 3 of reinforced concrete construction, the fire resistance performance of the building 1 can be enhanced by making the roof support structure 4 wooden while making the first wall 2 and the second wall 3 fire-resistant structures.

[0017] The first wall 2 and the second wall 3 are not limited to being made of reinforced concrete, and may have other configurations such as a wooden structure.

[0018] The roof 5 is in a plate shape, spans between the first wall 2 and the second wall 3, and is supported by the roof support structure 4 to cover the upper part of the column-free space 6.

[0019] In this embodiment, the roof 5 is composed of wooden insulation panels. In this case, the roof 5 can be configured by arranging a plurality of insulation panels in alignment with the span of the roof support structure 4 in the extending direction of the first wall 2 and the second wall 3. By making the roof 5 composed of wooden insulation panels, the wooden roof support structure 4 and the roof 5 appear on the inner side of the ceiling of the building 1, thereby enhancing the aesthetic appearance of the building 1.

[0020] The roof 5 is not limited to being composed of wooden insulation panels, and may be composed of members of other materials.

[0021] As shown in FIGS. 1 and 2, the wooden roof support structure 4 is provided between the first wall 2 and the second wall 3. In this embodiment, a plurality of sets of roof support structures 4 are arranged side by side in the extending direction of the first wall 2 and the second wall 3. The plurality of sets of roof support structures 4 are respectively supported on the upper end side portions of the first wall 2 and the second wall 3 and span between the first wall 2 and the second wall 3, and have a function as a beam for supporting the roof 5 from the lower side. That is, the first wall 2, the second wall 3, and the four sets of roof support structures 4 constitute the roof structure of the building 1.

[0022] As shown in FIG. 2, each roof support structure 4 can be configured to have, for example, four wooden truss bodies 11 to 14.

[0023] As shown in FIG. 3, the truss body 11 connected to the first wall 2 includes an upper chord member 11a, a lower chord member 11b, and a bundled member 11c.

[0024] The upper chord member 11a is a long, rectangular cross-section member that extends straight along the roof 5. Its longitudinal base end (left end in Figure 3) is positioned at the upper end of the first wall 2, and it is fixed to the upper end of the first wall 2 at the base end by a plurality of anchor bolts 15.

[0025] The lower chord member 11b is a long, straight member with a rectangular cross-section, positioned at an inclination with respect to the longitudinal direction of the upper chord member 11a, and connected to the upper chord member 11a at its tip. The longitudinal base end of the lower chord member 11b (the left end in Figure 3) abuts against the inner surface of the first wall 2 at a predetermined distance below the upper end, and is fixed to the inner surface of the first wall 2 at this base end by a plurality of anchor bolts 16.

[0026] The support members 11c are columnar members with a rectangular cross-section that extend straight, and are positioned vertically between the upper chord 11a and the lower chord 11b, connecting the upper chord 11a and the lower chord 11b. In this embodiment, multiple (four) support members 11c are provided between the upper chord 11a and the lower chord 11b, parallel to each other and spaced apart at predetermined intervals along the longitudinal direction of the upper chord 11a or the lower chord 11b. Note that at least one support member 11c is sufficient.

[0027] In this embodiment, multiple bracing members 11c are provided between the upper chord 11a and the lower chord 11b, and between adjacent pairs of bracing members 11c, diagonal members 11d are provided, connected to the connection portion between the bracing member 11c closer to the first wall 2 and the lower chord 11b, and to the connection portion between the other bracing member 11c further away from the first wall 2 and the upper chord 11a. This configuration makes it possible to increase the rigidity or strength of the truss body 11 against vertical loads.

[0028] As shown in Figure 2, the truss body 11 is connected to the first wall 2 at its base, inclined with respect to the horizontal direction, and extends inclined at an angle with respect to the direction perpendicular to the first wall 2 and the second wall 3. In this embodiment, the inner surface of the first wall 2 is provided with a columnar portion 9 having a support surface that inclins from one side to the other in the horizontal direction, and the truss body 11 is connected to the columnar portion 9.

[0029] Although a detailed explanation will be omitted, the truss body 12 has the same configuration as the truss body 11. As shown in Figure 2, the truss body 12 is connected at its base to the first wall 2 at an angle opposite to that of the truss body 11 with respect to the horizontal direction, and extends at an angle opposite to that of the truss body 11 with respect to the direction perpendicular to the first wall 2 and the second wall 3.

[0030] As shown in Figure 4, the truss body 13 connected to the second wall 3, like the truss bodies 11 and 12, is equipped with an upper chord member 13a, a lower chord member 13b, and a support member 13c.

[0031] The upper chord member 13a is a long, rectangular member that extends straight along the roof 5, similar to the upper chord member 13a. Its longitudinal base end (right end in Figure 4) is positioned at the upper end of the second wall 3, and it is fixed to the upper end of the second wall 3 at this base end by a plurality of anchor bolts 17.

[0032] The lower chord member 13b is a long, straight member with a rectangular cross-section, positioned at an inclination with respect to the longitudinal direction of the upper chord member 13a, and connected to the upper chord member 13a at its tip. The longitudinal base end of the lower chord member 13b (the right end in Figure 4) abuts against the inner surface of the second wall 3 at a predetermined distance below the upper end, and is fixed to the inner surface of the second wall 3 at this base end by a plurality of anchor bolts 18.

[0033] The support members 13c are columnar members with a rectangular cross-section that extend straight, and are positioned vertically between the upper chord 13a and the lower chord 13b, connecting the upper chord 13a and the lower chord 13b. In this embodiment, multiple (four) support members 13c are provided between the upper chord 13a and the lower chord 13b, parallel to each other and spaced apart at predetermined intervals along the longitudinal direction of the upper chord 13a or the lower chord 13b. Note that at least one support member 13c is sufficient.

[0034] In this embodiment, multiple bracing members 13c are provided between the upper chord 13a and the lower chord 13b, and between adjacent pairs of bracing members 13c, diagonal members 13d are provided, connected to the connection portion between the bracing member 13c closer to the second wall 3 and the lower chord 13b, and to the connection portion between the other bracing member 13c further away from the second wall 3 and the upper chord 13a. This configuration makes it possible to increase the rigidity or strength of the truss body 13 against vertical loads.

[0035] As shown in Figure 2, the truss body 13 is connected to the second wall 3 at its base end at an angle to the horizontal direction, and is arranged in a straight line with respect to the truss body 11 in a plan view. In this embodiment, the inner surface of the second wall 3 is also provided with columnar portions 10 having support surfaces that are inclined from one side to the other in the horizontal direction, and the truss body 13 is connected to the columnar portions 10.

[0036] Although a detailed explanation will be omitted, truss body 14 has the same configuration as truss body 13. As shown in Figure 2, truss body 14 is connected at its base to the second wall 3 at an angle opposite to that of truss body 13 with respect to the horizontal direction, and is arranged in a straight line with respect to truss body 12 in a plan view.

[0037] The four truss bodies 11-14 are connected at their ends.

[0038] In this embodiment, as shown in Figures 5 and 6, the ends of the four truss bodies 11 to 14 are each connected to a connecting member 20, thereby connecting them to one another via the connecting member 20. The connecting member 20 is a wooden board of a predetermined length, positioned along the upper chord members 11a and 13a, and connected to the ends of the four truss bodies 11 to 14 using multiple bolts 21.

[0039] Alternatively, the ends of the four truss bodies 11 to 14 may be directly connected to each other using fastening members such as bolts 21, without using the connecting material 20.

[0040] As described above, in the building 1 of this embodiment, the roof support structure 4 is configured such that four truss bodies 11 to 14 have upper chord members 11a and 13a respectively that follow the underside of the roof 5 and are arranged in an X shape in plan view. With this configuration, the truss bodies 11 to 14 can be made inexpensively using readily available, inexpensive timber without using expensive components such as connecting plates or other metal fittings, while the horizontal bracing effect of the four truss bodies 11 to 14 arranged in an X shape can increase the horizontal rigidity of the roof surface of the roof support structure 4. Therefore, a building 1 equipped with a wooden roof support structure 4 that can ensure the horizontal rigidity of the roof surface can be provided at a low cost.

[0041] Furthermore, by configuring the roof support structure 4 so that the four truss bodies 11 to 14 are arranged in an X shape in plan view, the aesthetics and design of the roof support structure 4 as seen from the column-free space 6 of the building 1 can be enhanced.

[0042] Furthermore, in this embodiment, the first wall 2 and the second wall 3 are made of reinforced concrete, and a wooden roof support structure 4 is provided between the first wall 2 and the second wall 3. This enhances the fire resistance of the building 1, while the horizontal load applied to the roof 5 is supported by the first wall 2 and the second wall 3, and the roof support structure 4 supports only the vertical load of the roof 5. This reduces the stress on the truss bodies 11 to 14, allowing their cross-sections to be slimmed down.

[0043] In the building 1 of this embodiment, the roof support structure 4 is configured such that a triangular cantilever beam is formed by truss bodies 11 and 12 connected to the first wall 2, and a triangular cantilever beam is formed by truss bodies 13 and 14 connected to the second wall 3, and these cantilever beams are hinged together at the center of the span between the first wall 2 and the second wall 3.

[0044] On the other hand, as shown in Figure 1, in this embodiment, the connection portion P between the tip of the lower chord member 11b of the truss bodies 11 and 12 connected to the first wall 2 and the tip of the lower chord member 13b of the truss bodies 13 and 14 connected to the second wall 3 is positioned above the straight line L connecting the base end of the lower chord member 11b of the truss bodies 11 and 12 connected to the first wall 2 and the base end of the lower chord member 13b of the truss bodies 13 and 14 connected to the second wall 3. That is, the lower chord members 11b of the truss bodies 11 and 12 connected to the first wall 2 and the lower chord members 13b of the truss bodies 13 and 14 connected to the second wall 3 are arranged in a V-shape of a three-point hinge between the first wall 2 and the second wall 3 in a side view.

[0045] With this configuration, even if an earthquake force exceeding expectations is applied to the building 1, causing the anchor bolts 15 and 17 to break and the upper chord members 11a and 13a to be unable to bear the load applied from the roof 5, the lower chord members 11b and 13b of the truss bodies 11-14 are arranged in a V-shape with three hinges between the first wall 2 and the second wall 3 in a side view, providing high resistance to the load and preventing the roof 5 from collapsing.

[0046] In this embodiment, the roof support structure 4 is configured such that four truss bodies 11 to 14 are arranged in an X shape in a plan view, as described above. However, it is not limited to this configuration. As long as it comprises wooden truss bodies each equipped with an upper chord, a lower chord connected to the upper chord at its tip, and a connecting member that connects the upper chord and the lower chord, it may also have other shapes or structures, such as multiple truss bodies arranged parallel to each other without intersecting.

[0047] As shown in Figure 7, the upper chord members 11a, 13a and lower chord members 11b, 13b of the truss bodies 11-14 are each connected longitudinally at joint portions J1-J3, and are composed of a timber structural member 34 in which multiple veneer laminated members 30, 31, and 32 are laminated with the joint portions J1-J3 offset longitudinally from each other, and these are integrated with a binding member 33. In this embodiment, the timber structural member 34 has a three-layer structure in which three veneer laminated members 30, 31, and 32 are laminated.

[0048] Specifically, the veneer laminated lumber 30 is a plate-like structure of a predetermined length shorter than the upper chord members 11a, 13a or the lower chord members 11b, 13b, and multiple veneer laminated lumbers 30 are connected longitudinally at joint portions J1 to form the first layer of the wood structural member 34. The veneer laminated lumber 31 is a plate-like structure of a predetermined length shorter than the upper chord members 11a, 13a or the lower chord members 11b, 13b, and multiple veneer laminated lumbers 31 are connected longitudinally at joint portions J2 to form the second layer of the wood structural member 34. Here, the joint portion J2 of the veneer laminated lumber 31 is positioned offset longitudinally from the joint portion J1 of the veneer laminated lumber 30. The laminated veneer 32 is a plate-like structure of a predetermined length, shorter than the upper chord members 11a, 13a or the lower chord members 11b, 13b. Multiple laminated veneer 32 pieces are connected longitudinally at joint portions J3 to form the third layer of the wood structural member 34. Here, the joint portion J3 of the laminated veneer 32 is offset longitudinally from both the joint portion J1 of the laminated veneer 30 and the joint portion J2 of the laminated veneer 32.

[0049] As the laminated veneer lumber 30, 31, and 32, for example, LVL (Laminated Veneer Lumber) can be used, which is constructed by laminating multiple wood veneers with the grain direction aligned, applying adhesive, bonding them together, and then compressing them. By using inexpensive and readily available LVL as the laminated veneer lumber 30, 31, and 32, the cost of the roof support structure 4 can be further reduced.

[0050] Furthermore, by integrating the laminated veneer lumber 30, 31, and 32 using the binding material 33, the work of integrating the laminated veneer lumber 30, 31, and 32 using adhesive is eliminated, thereby reducing the cost of the wood structural member 34. Multiple high-strength screws can be used as the binding material 33. By using multiple screws (high-strength screws) as the binding material 33, the processing of forming pre-drilled holes in the laminated veneer lumber 30 to 32 is eliminated, further reducing the cost of the wood structural member 34.

[0051] The wooden structural member 34 is constructed by laminating veneer laminated members 30 to 32 of each layer with their joint portions J1 to J3 offset in the longitudinal direction. Therefore, even in the portion where the joint portions J1 to J3 are provided, the cross-sectional area of ​​the veneer laminated members 30 to 32 of the layers other than the layer containing the joint portions J1 to J3 is secured, resulting in a highly strong structure.

[0052] Therefore, by constructing the long upper chord members 11a, 13a or lower chord members 11b, 13b corresponding to the long span using the above-described wooden structural member 34, the upper chord members 11a, 13a or lower chord members 11b, 13b can have the length corresponding to the long span and the desired rigidity without using metal fittings such as connecting plates. Furthermore, since the wooden structural member 34 is formed from inexpensive laminated veneer 31 and binding members 33, the cost of the roof support structure 4 can be further reduced.

[0053] The wooden structural member 34 is not limited to the three-layer structure described above; it may also be a two-layer structure formed by laminating two sheets of laminated veneer material, or a multi-layer structure formed by laminating four or more sheets of laminated veneer material.

[0054] Since the upper chord members 11a, 13a or lower chord members 11b, 13b are formed from the wood structural member 34 with the above configuration, a mortise hole can be made by cutting a notch in the second layer of laminated veneer 31 of the upper chord members 11a, 13a or lower chord members 11b, 13b, and the tenons provided at both ends of the support members 11c, 13c or diagonal members 11d, 13d can be inserted into the mortise hole and fixed with multiple screws or other fasteners, thereby connecting the support members 11c, 13c or diagonal members 11d to the upper chord members 11a, 13a or lower chord members 11b, 13b. This allows for a strong connection of the strut members 11c, 13c or diagonal members 11d, 13d to the upper chord members 11a, 13a or lower chord members 11b, 13b without the use of connecting plates or other metal fittings, while ensuring the rigidity by securing a cross-sectional area equivalent to two sheets for the upper chord members 11a, 13a or lower chord members 11b, 13b.

[0055] The roof support structure 4 with the above configuration can be constructed, for example, by the building construction method of this embodiment shown below.

[0056] First, as shown in Figure 8, the truss bodies 11 to 14 with the above configuration are manufactured. The number of truss bodies 11 to 14 is corresponding to the number of roof support structures 4 used in building 1. The truss bodies 11 to 14 may be manufactured in a factory located in a different location from the building site of building 1, and then transported from the factory to the building site using trucks or the like. By manufacturing the truss bodies 11 to 14 in a factory, it becomes easier to manufacture truss bodies 11 to 14 with higher dimensional accuracy.

[0057] Next, as shown in Figure 9, truss bodies 11 and 12 are connected to the first wall 2 at their base ends, inclined horizontally, and truss bodies 13 and 14 are connected to the second wall 3 at their base ends, also inclined horizontally, so that these four truss bodies 11 to 14 are arranged in an X shape in plan view.

[0058] Next, as shown in Figure 10, connecting members 20 are placed between the ends of the four truss bodies 11-14, and the ends of the four truss bodies 11-14 are connected to the connecting members 20. This forms a roof support structure 4 having four truss bodies 11-14.

[0059] Thus, according to the construction method of this embodiment, the four truss bodies 11 to 14 are connected at their base ends to the first wall 2 or the second wall 3 at an inclination with respect to the horizontal direction, and are arranged in an X shape in plan view between the first wall 2 and the second wall 3. Then, the ends of the four truss bodies 11 to 14 are connected to the connecting material 20 to form the roof support structure 4. This makes it easy to connect the ends of the four truss bodies 11 to 14, and allows for the easy and quick construction of a roof support structure 4 with four truss bodies 11 to 14 arranged in an X shape in plan view between the first wall 2 and the second wall 3.

[0060] The truss bodies 11 to 14 that constitute the roof support structure 4 can be unitized structures formed by connecting a first truss half and a second truss half, respectively. Figure 11 shows the first truss half 11A and the second truss half 11B that form the truss body 11 in a separated state.

[0061] The first truss half 11A comprises an upper chord half 11a1, a lower chord half 11b1 connected to the upper chord half 11a1 at its tip, and a first brace member 11c connecting the upper chord half 11a1 and the lower chord half 11b1. The upper chord half 11a1 is the tip end portion of the upper chord 11a which is divided longitudinally at the joint portions J1 to J3 of each layer, and the lower chord half 11b1 is the tip end portion of the lower chord 11b which is divided longitudinally at the joint portions J1 to J3 of each layer.

[0062] The second truss half 11B comprises an upper chord half 11a2, a lower chord half 11b2 positioned below the upper chord half 11a2, and three second bracing members 11c connecting the upper chord half 11a2 and the lower chord half 11b2. The upper chord half 11a2 is the base end portion of the upper chord 11a that is divided longitudinally at the joint portions J1 to J3 of each layer, and the lower chord half 11b2 is the base end portion of the lower chord 11b that is divided longitudinally at the joint portions J1 to J3 of each layer. The second truss half 11B also has two diagonal members 11d positioned between adjacent bracing members 11c.

[0063] The truss body 11 is formed by connecting a first truss half 11A and a second truss half 11B. The diagonal members 11d between the first truss half 11A and the second truss half 11B are separate from the first truss half 11A and the second truss half 11B, and are placed between adjacent bracing members 11c when connecting the first truss half 11A and the second truss half 11B, and are connected to the first truss half 11A and the second truss half 11B.

[0064] If the truss bodies 11 to 14 are formed by connecting the first truss half 11A and the second truss half 11B, then the construction method of the building described above may further include, before the process of manufacturing the truss bodies 11 to 14, a process of manufacturing the first truss half having the above configuration, a process of manufacturing the second truss half having the above configuration, and a process of manufacturing the truss bodies 11 to 14 by connecting the first truss half and the second truss half.

[0065] In this case, the first and second truss halves can be manufactured in a factory located in a different location from the construction site of building 1, transported from the factory to the construction site using trucks or the like, and then assembled on-site at the construction site to manufacture truss bodies 11-14. This makes it easier to transport the truss bodies 11-14 from the factory to the construction site while also making it easier to manufacture truss bodies 11-14 with higher dimensional accuracy.

[0066] The present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. [Explanation of symbols]

[0067] 1 Building 2. The First Wall 3. The second wall 4. Roof support structure 5. Roof 6 Columnless space 7 beds 8. The Third Wall 9 Columnar part 10 Columnar part 11 Truss 11A First Truss Half 11B Second Truss Half 11a Top chord 11a1 Upper chord half 11a2 Upper chord half 11b Lower chord 11b1 Lower chord material (half) 11b2 Lower chord material (half) 11c Bundle material 11d Diagonal 12 Truss Body 13 Truss 13a Top chord 13b Lower string 13c bundle material 13d diagonal 14 Truss Body 15 Anchor bolts 16 Anchor bolts 17 Anchor bolts 18 Anchor bolts 20 Bonding material 21 volts 30 laminated veneer lumber 31. Laminated veneer lumber 32 Laminated veneer lumber 33 Binding material 34. Wooden structural members P connection part L straight line J1 Joint section J2 joint section J3 Joint section

Claims

1. A building having a first wall, a second wall, a wooden roof support structure provided between the first wall and the second wall, and a roof supported by the roof support structure, The aforementioned roof support structure, Each has a wooden truss body comprising an upper chord, a lower chord connected to the upper chord at its tip, and a bracing member connecting the upper chord and the lower chord. As the upper chord member and the lower chord member, A building characterized by using multiple laminated veneer materials, each connected longitudinally at joints and stacked with the joints offset longitudinally from one another, and then integrated with binding material.

2. The building according to claim 1, wherein the fastening material is a plurality of screws that penetrate a plurality of the laminated veneer materials.

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