Building timber

Abstract

To provide a building wood which is excellent in carbon dioxide emission suppression effect and reusability, and has fire resistance performance.SOLUTION: A building wood material having a finished surface and a fireproof flow path, wherein the fireproof flow path has an introduction port, a hollow parallel flow path communicating with the introduction port and extending in parallel with the finished surface, and a discharge port communicating with the parallel flow path and opening to the finished surface, water passed from the introduction port in case of fire can be discharged from the discharge port through the parallel flow path, and the building wood material is formed of laminated wood or cross-laminated wood having a plate having a groove constituting the parallel flow path.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to building timber. [Background technology]

[0002] Fire-resistant building timber is known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-208353 Summary of the Invention [Problem to be solved by the invention]

[0004] It is preferable that the wood for construction has excellent carbon dioxide emission suppression effect and recyclability.

[0005] Therefore, an object of the present invention is to provide a building timber that has excellent carbon dioxide emission reduction effects, is recyclable, and has fire resistance. [Means for solving the problem]

[0006] One aspect of the present invention is as follows.

[0007] [1] having a finished surface and a refractory channel; The fire-resistant flow path has an inlet, a hollow parallel flow path that is connected to the inlet and extends parallel to the finished surface, and an outlet that is connected to the parallel flow path and opens to the finished surface, and in the event of a fire, water passed through the inlet can be discharged from the outlet through the parallel flow path.

[0008] [2] The building timber according to [1], which can retain water flowing through the fire-resistant flow path.

[0009] [3] The building timber according to [2], wherein the finished surface can retain water flowing through the fire-resistant flow path.

[0010] [4] The building timber according to [2] or [3], which is capable of absorbing water flowing through the fire-resistant flow path through the surfaces of the parallel flow paths.

[0011] [5] The lumber for construction according to any one of [1] to [4], wherein the inlet is provided on the surface opposite to the finished surface or on the finished surface.

[0012] [6] The parallel flow paths have a plurality of first flow paths that are aligned along the finished surface, are parallel to each other, and extend parallel to the finished surface, and a flow path connection portion that connects all of the first flow paths to each other. The building timber described in any one of [1] to [5].

[0013] [7] The flow path connection portion has a second flow path that is aligned along the finished surface and extends parallel to the finished surface from one end to the other of the plurality of first flow paths. [6] The building timber described in

[0014] [8] The parallel flow paths have a group of outlets consisting of a plurality of outlets aligned along the first flow paths, corresponding to each of the first flow paths. The building timber described in [6] or [7].

[0015] [9] The parallel flow paths include a first flow path group consisting of a plurality of first flow paths that are aligned along the finished surface, are parallel to each other, and extend parallel to the finished surface, and have inner ends of the discharge outlets that open, and a second flow path group consisting of a plurality of second flow paths that are aligned along the finished surface and extend parallel to the finished surface from end to end of the plurality of first flow paths, A building timber as described in any one of [1] to [8], wherein at least one of the first flow paths has a water-retaining layer that protrudes closer to the finished surface than all of the second flow paths connected to the first flow path, or at least one of the second flow paths has a water-retaining layer that protrudes closer to the finished surface than all of the first flow paths connected to the second flow path.

[0016]

[10] The first flow path group has, as the first flow path, a first discharge flow path that does not have the water-retaining layer but has the discharge outlet, and a first water-retaining flow path that does not have the discharge outlet but has the water-retaining layer as the first flow path, as described in [9].

[0017]

[11] The building timber according to [9] or

[10] , wherein the first flow path group has a first flow path for draining retained water, the first flow path having the retained water layer and the outlet.

[0018]

[12] The building timber according to any one of [9] to

[11] , wherein the second flow path group has a second water-retaining flow path that does not have the outlet but has the water-retaining layer as the second flow path.

[0019]

[13] The fire-resistant flow path has a second inlet, a hollow second parallel flow path that is connected to the second inlet and extends parallel to the finished surface on the opposite side of the finished surface or on the side of the finished surface relative to the parallel flow path, and a second outlet that is connected to the second parallel flow path and opens to the finished surface, and in the event of a fire, water passed through the second inlet can be discharged from the second outlet through the second parallel flow path. Construction wood described in any one of [9] to

[12] .

[0020]

[14] The building lumber according to any one of [9] to

[13] , wherein the second inlet is provided on an outer surface of the building lumber.

[0021]

[15] a plate having grooves that form the parallel flow paths; The building timber according to any one of [1] to

[14] , which is formed from lumber, laminated veneer lumber, plywood, glued laminated lumber, cross-laminated lumber, or any combination thereof.

[0022]

[16] [1] A fire-resistant wooden structure comprising the wooden building material according to any one of [1] to

[15] . [Effects of the Invention]

[0023] According to the present invention, it is possible to provide a construction timber material that is effective in reducing carbon dioxide emissions, has excellent recyclability, and has fire resistance. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a front view of a building timber according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a top view of the building lumber shown in FIG. [Figure 3] FIG. 2 is a right side view showing the construction lumber shown in FIG. [Figure 4] FIG. 4 is a partially enlarged view of FIG. [Figure 5] FIG. 2 is a front view of a building timber according to a second embodiment of the present invention. [Figure 6] FIG. 6 is a top view of the building timber shown in FIG. 5. [Figure 7] FIG. 6 is a right side view showing the construction lumber shown in FIG. 5. [Figure 8] FIG. 10 is a front view of a construction lumber according to a third embodiment of the present invention. [Figure 9] FIG. 9 is a top view of the building lumber shown in FIG. 8. [Figure 10] FIG. 9 is a right side view showing the construction lumber shown in FIG. 8. [Figure 11] FIG. 10 is a front view of a building timber according to a fourth embodiment of the present invention. [Figure 12] FIG. 12 is a top view of the building timber shown in FIG. [Figure 13] FIG. 12 is a right side view showing the construction lumber shown in FIG. [Figure 14]FIG. 10 is a front view of a building timber according to a fifth embodiment of the present invention. [Figure 15] FIG. 15 is a top view of the building lumber shown in FIG. 14. [Figure 16] FIG. 15 is a right side view showing the construction lumber shown in FIG. [Figure 17] FIG. 10 is a front view of a building timber according to a sixth embodiment of the present invention. [Figure 18] FIG. 18 is a top view of the building timber shown in FIG. 17. [Figure 19] 18 is a cross-sectional view of the construction lumber shown in FIG. 17 along the line AA. [Figure 20] 18 is a BB cross-sectional view of the building lumber shown in FIG. 17. [Figure 21] FIG. 10 is a front view of a building timber according to a seventh embodiment of the present invention. [Figure 22] FIG. 22 is a top view of the building lumber shown in FIG. 21. [Figure 23] FIG. 22 is a right side view showing the construction lumber shown in FIG. 21. [Figure 24] FIG. 10 is a front view of a building timber according to an eighth embodiment of the present invention. [Figure 25] FIG. 25 is a top view of the building timber shown in FIG. 24. [Figure 26] FIG. 25 is a right side view showing the construction lumber shown in FIG. 24. [Figure 27] FIG. 13 is a front view of a timber for construction according to a ninth embodiment of the present invention. [Figure 28] FIG. 28 is a top view of the construction lumber shown in FIG. 27. [Figure 29] 28 is a CC cross-sectional view of the construction lumber shown in FIG. 27. FIG. [Figure 30] FIG. 28 is a DD cross-sectional view of the building lumber shown in FIG. 27. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0026] First Embodiment As shown in Figures 1 to 4, in the first embodiment of the present invention, a building timber 1 has a finished surface 2 and a fire-resistant flow path 3, and the fire-resistant flow path 3 has an inlet 4, a hollow parallel flow path 5 that communicates with the inlet 4 and extends parallel to the finished surface 2, and an outlet 6a that communicates with the parallel flow path 5 and opens to the finished surface 2, so that in the event of a fire, water passed through the inlet 4 can be discharged from the outlet 6a through the parallel flow path 5.

[0027] According to the above configuration, in the event of a fire, water is passed through the inlet 4 and discharged through the outlet 6a via the parallel flow paths 5. This causes the water discharged from the outlet 6a to vaporize due to the heat of the fire, and the heat of vaporization cools the finished surface 2. At this time, the finished surface 2 can also be cooled by the water flowing through the parallel flow paths 5 that extend parallel to the finished surface 2. Therefore, compared to imparting fire resistance, such as fire resistance or quasi-fire resistance, by applying or absorbing a fire-resistant agent, a fire-resistant building timber 1 can be realized that has excellent fire resistance, reduces carbon dioxide emissions, and is highly recyclable. The building timber 1 may also be configured to exhibit fire resistance, such as non-combustible, quasi-non-combustible, or flame-retardant materials, in addition to fire resistance.

[0028] The building timber 1 can retain water flowing through the fire-resistant flow path 3. According to the above configuration, the water flowing through the fire-resistant flow path 3 is retained in the building timber 1, thereby improving the fire resistance performance.

[0029] The finished surface 2 of the building timber 1 can retain water flowing through the fire resistance flow path 3. According to the above configuration, the water flowing through the fire resistance flow path 3 is retained on the finished surface 2, thereby improving the fire resistance performance.

[0030] The building timber 1 can absorb the water flowing through the fire resistance flow path 3 through the surfaces of the parallel flow paths 5. According to the above configuration, the water flowing through the fire resistance flow path 3 is absorbed into the building timber 1 through the surfaces of the parallel flow paths 5, thereby improving the fire resistance performance.

[0031] The inlet 4 is provided on the surface 7 opposite the finished surface 2. With the above configuration, it is possible to reduce the need to provide the inlet 4 on the finished surface 2, making it easier to ensure the design of the finished surface 2. The inlet 4 may also be configured to be provided on the finished surface 2. With the above configuration, it is possible to reduce the need to provide the inlet 4 on the surface 7 opposite the finished surface 2, making it easier to ensure the design of the surface 7 opposite the finished surface 2.

[0032] The parallel flow paths 5 have a plurality of first flow paths 5a that are aligned along the finishing surface 2, are parallel to each other, and extend parallel to the finishing surface 2, and a flow path connection portion 5b that connects all of the first flow paths 5a to each other. According to the above configuration, the finishing surface 2 can be efficiently cooled by flowing water through the plurality of first flow paths 5a and the flow path connection portion 5b.

[0033] The flow path connecting portion 5b has second flow paths 5b1 that are aligned along the finishing surface 2 and extend from one end of the plurality of first flow paths 5a to the other in parallel with the finishing surface 2. According to the above configuration, the finishing surface 2 can be efficiently cooled by flowing water through the plurality of first flow paths 5a and the second flow paths 5b1.

[0034] The flow path connecting portion 5b has a plurality of second flow paths 5b1 aligned along the finishing surface 2. According to the above configuration, the finishing surface 2 can be efficiently cooled by flowing water through the plurality of first flow paths 5a and the plurality of second flow paths 5b1.

[0035] The parallel flow paths 5 have a group of outlets 6 (see FIG. 4) consisting of a plurality of outlets 6a aligned along the first flow paths 5a, corresponding to each of the first flow paths 5a. According to the above configuration, the finishing surface 2 can be efficiently cooled by discharging water from the group of outlets 6. The plurality of outlets 6a can be configured to be aligned at equal intervals, for example, as shown in FIG. 4. Note that the group of outlets 6 is not shown in FIGS. 1 to 3.

[0036] The building timber 1 has a board 9 with grooves 8 that form parallel flow paths 5, and is formed from laminated timber 10. With the above configuration, it is easy to produce building timber 1 of the desired size. Instead of laminated timber 10, the building timber 1 may be formed from cross-laminated timber, in which the laminae are stacked in the same direction as the laminated timber 10.

[0037] The laminated lumber 10 is formed from the above boards 9. According to the above configuration, it is possible to more easily realize a lumber for construction 1 having a finished surface 2 of a desired size.

[0038] The laminated lumber 10 is made up of multiple boards 9, each having a groove 8 that forms a parallel flow path 5. With the above configuration, it is easy to realize a building lumber 1 having a finished surface 2 of a desired size that can be cooled efficiently.

[0039] The laminated lumber 10 is made up of the above-mentioned multiple plates 9, each having a groove 8 that forms the first flow path 5a and a through hole 11 that forms the second flow path 5b1. With this configuration, it is easy to realize a building lumber 1 having a finished surface 2 of a desired size that can be efficiently cooled by the above-mentioned multiple first flow paths 5a and second flow paths 5b1.

[0040] The laminated lumber 10 is made up of the plurality of plates 9, each having a groove 8 that forms the first flow path 5a and a plurality of through holes 11 that form the plurality of second flow paths 5b1. With the above configuration, it is easy to realize a building lumber 1 of a desired size that has a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a and the plurality of second flow paths 5b1.

[0041] The building timber 1 has a plurality of first plugs 12 that plug the plurality of through holes 11 in the first board 9 that forms the first end of the building timber 1, and a plurality of second plugs 12 that plug the plurality of through holes 11 in the second board 9 that forms the second end of the building timber 1. With the above configuration, the plurality of second flow paths 5b1 that can efficiently cool the finished surface 2 can be easily realized.

[0042] In this embodiment, the wooden fire-resistant structure 13 includes the building timber 1. With the above configuration, it is possible to realize the wooden fire-resistant structure 13, which is excellent in terms of reducing carbon dioxide emissions and recyclability. Note that the fire-resistant structure 13 may be configured so that the building timber 1 provides fire resistance as well as non-combustibility.

[0043] Second Embodiment As shown in Figures 5 to 7, in the second embodiment of the present invention, a building timber 1 has a finished surface 2 and a fire-resistant flow path 3, and the fire-resistant flow path 3 has an inlet 4, a hollow parallel flow path 5 that communicates with the inlet 4 and extends parallel to the finished surface 2, and an outlet 6a that communicates with the parallel flow path 5 and opens to the finished surface 2, so that in the event of a fire, water passed through the inlet 4 can be discharged from the outlet 6a through the parallel flow path 5.

[0044] The building timber 1 can retain water flowing through the fire resistance flow channel 3. The building timber 1 can retain water flowing through the fire resistance flow channel 3 at its finished surface 2. The building timber 1 can absorb water flowing through the fire resistance flow channel 3 through the surfaces of the parallel flow channels 5.

[0045] The inlet 4 is provided on the finishing surface 2. The inlet 4 may be provided on the surface 7 opposite to the finishing surface 2.

[0046] The parallel flow paths 5 have a plurality of first flow paths 5a that are aligned along the finishing surface 2, are parallel to each other, and extend parallel to the finishing surface 2, and a flow path connection portion 5b that connects all of the first flow paths 5a to each other. The flow path connection portion 5b has second flow paths 5b1 that are aligned along the finishing surface 2 and extend parallel to the finishing surface 2 from one end of the plurality of first flow paths 5a to the other. The flow path connection portion 5b has a plurality of second flow paths 5b1 that are aligned along the finishing surface 2.

[0047] The parallel flow paths 5 have a discharge port group 6 (see FIG. 7) made up of a plurality of discharge ports 6a aligned along the first flow paths 5a, corresponding to each of the first flow paths 5a. The plurality of discharge ports 6a can be configured to be aligned at equal intervals, for example, as shown in FIG. 7. The discharge port group 6 is not shown in FIGS. 5 and 6.

[0048] The building timber 1 has a board 9 with grooves 8 that form parallel flow paths 5, and is formed from laminated timber 10. Instead of the laminated timber 10, the building timber 1 may be formed from cross-laminated timber, the laminae of which have the same stacking direction as the laminated timber 10.

[0049] The laminated lumber 10 is formed from the above boards 9. With the above configuration, a lumber piece 1 for construction of a desired size can be easily produced.

[0050] The board 9 has a plurality of grooves 8 that constitute the plurality of first flow paths 5a. With the above configuration, it is possible to easily realize a building lumber 1 having a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a. The board 9 has a plurality of grooves 8 that constitute the plurality of first flow paths 5a and grooves 8 that constitute the second flow paths 5b1. With the above configuration, it is possible to easily realize a building lumber 1 having a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a and the plurality of second flow paths 5b1. The board 9 has a plurality of grooves 8 that constitute the plurality of first flow paths 5a and grooves 8 that constitute the plurality of second flow paths 5b1. With the above configuration, it is possible to easily realize a building lumber 1 having a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a and the plurality of second flow paths 5b1.

[0051] In this embodiment, the fire-resistant wooden structure 13 includes a piece of building timber 1. The fire-resistant wooden structure 13 includes a plurality of pieces of building timber 1 joined together in a direction along the finished surface 2. With the above configuration, a fire-resistant wooden structure 13 having a finished surface 2 of a desired size can be easily realized.

[0052] Third Embodiment As shown in Figures 8 to 10, in the third embodiment of the present invention, a building timber 1 has a finished surface 2 and a fire-resistant flow path 3, and the fire-resistant flow path 3 has an inlet 4, a hollow parallel flow path 5 that communicates with the inlet 4 and extends parallel to the finished surface 2, and an outlet 6a that communicates with the parallel flow path 5 and opens to the finished surface 2, so that in the event of a fire, water passed through the inlet 4 can be discharged from the outlet 6a through the parallel flow path 5.

[0053] The building timber 1 can retain water flowing through the fire resistance flow channel 3. The building timber 1 can retain water flowing through the fire resistance flow channel 3 at its finished surface 2. The building timber 1 can absorb water flowing through the fire resistance flow channel 3 through the surfaces of the parallel flow channels 5.

[0054] The inlet 4 is provided on the finishing surface 2. The inlet 4 may be provided on the surface 7 opposite to the finishing surface 2.

[0055] The parallel flow paths 5 have a plurality of first flow paths 5a that are aligned along the finishing surface 2, are parallel to each other, and extend parallel to the finishing surface 2, and a flow path connection portion 5b that connects all of the first flow paths 5a to each other. The flow path connection portion 5b has second flow paths 5b1 that are aligned along the finishing surface 2 and extend parallel to the finishing surface 2 from one end of the plurality of first flow paths 5a to the other. The flow path connection portion 5b has a plurality of second flow paths 5b1 that are aligned along the finishing surface 2.

[0056] The parallel flow paths 5 have a discharge port group 6 (see FIG. 10) made up of a plurality of discharge ports 6a aligned along the first flow paths 5a, corresponding to each of the first flow paths 5a. The plurality of discharge ports 6a can be configured to be aligned at equal intervals as shown in FIG. 10. The discharge port group 6 is not shown in FIGS. 8 and 9.

[0057] The building timber 1 has boards 9 with grooves 8 that form parallel flow paths 5, and is formed from cross-laminated timber 14. The cross-laminated timber 14 is formed from the boards 9. Alternatively, the boards 9 may be cut into lumber and joined to the cross-laminated timber 14. This configuration makes it easy to produce building timber 1 of a desired size. The number of layers that make up the cross-laminated timber 14 can be set as appropriate, and may be either an even number or an odd number.

[0058] The board 9 has grooves 8 that form part of the plurality of first flow paths 5a. With the above configuration, it is possible to easily realize a building lumber 1 having a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a. The board 9 has a plurality of grooves 8 that form part of the plurality of first flow paths 5a. With the above configuration, it is even more possible to easily realize a building lumber 1 having a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a.

[0059] The board 9 has grooves 8 that form part of the plurality of first flow paths 5a and grooves 8 that form the second flow paths 5b1. With the above configuration, it is possible to easily realize a building lumber 1 having a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a and the plurality of second flow paths 5b1. The board 9 has grooves 8 that form part of the plurality of first flow paths 5a and a plurality of grooves 8 that form the plurality of second flow paths 5b1. With the above configuration, it is possible to easily realize a building lumber 1 having a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a and the plurality of second flow paths 5b1.

[0060] The board 9 has a plurality of grooves 8 that form part of the plurality of first flow paths 5a and grooves 8 that form the second flow paths 5b1. With the above configuration, it is possible to more easily realize a building lumber 1 having a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a and the plurality of second flow paths 5b1. The board 9 has a plurality of grooves 8 that form part of the plurality of first flow paths 5a and grooves 8 that form the plurality of second flow paths 5b1. With the above configuration, it is possible to more easily realize a building lumber 1 having a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a and the plurality of second flow paths 5b1.

[0061] The board 9 has an inlet 4. According to the above configuration, the finishing surface 2 can be cooled more efficiently by utilizing the multiple inlets 4 formed in the timber 1 for construction.

[0062] In this embodiment, the fire-resistant wooden structure 13 includes a building timber 1 .

[0063] <Fourth embodiment> As shown in Figures 11 to 13, in the fourth embodiment of the present invention, a building timber 1 has a finished surface 2 and a fire-resistant flow path 3, and the fire-resistant flow path 3 has an inlet 4, a hollow parallel flow path 5 that communicates with the inlet 4 and extends parallel to the finished surface 2, and an outlet 6a that communicates with the parallel flow path 5 and opens to the finished surface 2, so that in the event of a fire, water passed through the inlet 4 can be discharged from the outlet 6a through the parallel flow path 5.

[0064] The building timber 1 can retain water flowing through the fire resistance flow channel 3. The building timber 1 can retain water flowing through the fire resistance flow channel 3 at its finished surface 2. The building timber 1 can absorb water flowing through the fire resistance flow channel 3 through the surfaces of the parallel flow channels 5.

[0065] The inlet 4 is provided on the surface 7 opposite to the finishing surface 2. The inlet 4 may be configured to be provided on the finishing surface 2.

[0066] The parallel flow paths 5 have a plurality of first flow paths 5a that are aligned along the finishing surface 2, are parallel to each other, and extend parallel to the finishing surface 2, and a flow path connection portion 5b that connects all of the first flow paths 5a to each other. The flow path connection portion 5b has second flow paths 5b1 that are aligned along the finishing surface 2 and extend parallel to the finishing surface 2 from one end of the plurality of first flow paths 5a to the other. The flow path connection portion 5b has a plurality of second flow paths 5b1 that are aligned along the finishing surface 2.

[0067] The parallel flow paths 5 have a discharge port group 6 (see FIG. 13) made up of a plurality of discharge ports 6a aligned along the first flow paths 5a, corresponding to each of the first flow paths 5a. The plurality of discharge ports 6a can be configured to be aligned at equal intervals as shown in FIG. 13. The discharge port group 6 is not shown in FIGS. 11 and 12.

[0068] The building timber 1 has first and second layer boards 9, each having grooves 8 that form parallel flow paths 5, and is formed from cross-laminated timber 14. The cross-laminated timber 14 is formed from the boards 9. Alternatively, the boards 9 may be cut into lumber and joined to the cross-laminated timber 14.

[0069] The first layer plate 9 has grooves 8 that form part of the plurality of first flow paths 5a. The first layer plate 9 has a plurality of grooves 8 that form part of the plurality of first flow paths 5a.

[0070] The first layer board 9 has grooves 8 that form part of the plurality of first flow paths 5a, and the second layer board 9 has grooves 8 that form the second flow paths 5b1. With the above configuration, it is possible to easily realize a building timber 1 that has a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a and the second flow paths 5b1.

[0071] The board 9 has a plurality of grooves 8 that form part of the plurality of first flow paths 5a, and the second layer board 9 has grooves 8 that form the second flow paths 5b1. With this configuration, it is possible to more easily realize a building timber 1 that has a finished surface 2 that can be efficiently cooled by the plurality of first flow paths 5a and the second flow paths 5b1.

[0072] In this embodiment, the fire-resistant wooden structure 13 includes a building timber 1 .

[0073] Fifth Embodiment As shown in Figures 14 to 16, in the fifth embodiment of the present invention, a building timber 1 has a finished surface 2 and a fire-resistant flow path 3, and the fire-resistant flow path 3 has an inlet 4, a hollow parallel flow path 5 that communicates with the inlet 4 and extends parallel to the finished surface 2, and an outlet 6a that communicates with the parallel flow path 5 and opens to the finished surface 2, so that water passed through the inlet 4 in the event of a fire can be discharged from the outlet 6a through the parallel flow path 5.

[0074] The building timber 1 can retain water flowing through the fire resistance flow channel 3. The building timber 1 can retain water flowing through the fire resistance flow channel 3 at its finished surface 2. The building timber 1 can absorb water flowing through the fire resistance flow channel 3 through the surfaces of the parallel flow channels 5.

[0075] The inlet 4 is provided on the finishing surface 2. The inlet 4 may be provided on the surface 7 opposite to the finishing surface 2.

[0076] The parallel flow paths 5 have a plurality of first flow paths 5a that are aligned along the finishing surface 2, are parallel to each other, and extend parallel to the finishing surface 2, and a flow path connection portion 5b that connects all of the first flow paths 5a to each other. The flow path connection portion 5b has second flow paths 5b1 that are aligned along the finishing surface 2 and extend parallel to the finishing surface 2 from one end of the plurality of first flow paths 5a to the other. The flow path connection portion 5b has a plurality of second flow paths 5b1 that are aligned along the finishing surface 2.

[0077] The parallel flow paths 5 have a discharge port group 6 (see FIG. 16) made up of a plurality of discharge ports 6a aligned along the first flow paths 5a, corresponding to each of the first flow paths 5a. The plurality of discharge ports 6a can be configured to be aligned at equal intervals as shown in FIG. 16. The discharge port group 6 is not shown in FIGS. 14 and 15.

[0078] The building timber 1 has a board 9 with grooves 8 that form parallel flow paths 5, and is formed from a laminated timber 10. The board 9, as a sawn lumber, is joined to the laminated timber 10. With this configuration, the building timber 1 can be easily manufactured to a desired size. Instead of the laminated timber 10, the building timber 1 may be formed from cross-laminated timber, in which the laminae are stacked in the same direction as the laminated timber 10.

[0079] The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a. The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a and a groove 8 that forms the second flow path 5b1. The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a and a plurality of grooves 8 that form the plurality of second flow paths 5b1.

[0080] In this embodiment, the fire-resistant wooden structure 13 has a building timber 1. The fire-resistant wooden structure 13 has a plurality of building timbers 1 joined together in a direction along the finished surface 2.

[0081] Sixth Embodiment As shown in Figures 17 to 20, in the sixth embodiment of the present invention, a building timber 1 has a finished surface 2 and a fire-resistant flow path 3, and the fire-resistant flow path 3 has an inlet 4, a hollow parallel flow path 5 that communicates with the inlet 4 and extends parallel to the finished surface 2, and an outlet 6a that communicates with the parallel flow path 5 and opens to the finished surface 2, so that in the event of a fire, water passed through the inlet 4 can be discharged from the outlet 6a through the parallel flow path 5.

[0082] The building timber 1 can retain water flowing through the fire resistance flow channel 3. The building timber 1 can retain water flowing through the fire resistance flow channel 3 at its finished surface 2. The building timber 1 can absorb water flowing through the fire resistance flow channel 3 through the surfaces of the parallel flow channels 5.

[0083] The inlet 4 is provided on the finishing surface 2. The inlet 4 may be provided on the surface 7 opposite to the finishing surface 2.

[0084] The parallel flow paths 5 have a plurality of first flow paths 5a that are aligned along the finishing surface 2, are parallel to each other, and extend parallel to the finishing surface 2, and a flow path connection portion 5b that connects all of the first flow paths 5a to each other. The flow path connection portion 5b has second flow paths 5b1 that are aligned along the finishing surface 2 and extend parallel to the finishing surface 2 from one end of the plurality of first flow paths 5a to the other. The flow path connection portion 5b has a plurality of second flow paths 5b1 that are aligned along the finishing surface 2.

[0085] The parallel flow paths 5 include a first flow path group 5A consisting of a plurality of first flow paths 5a aligned along the finished surface 2, parallel to each other, and extending parallel to the finished surface 2, with the inner ends of the outlets 6a opening, and a second flow path group 5B1 consisting of a plurality of second flow paths 5b1 aligned along the finished surface 2 and extending parallel to the finished surface 2 from one end of the plurality of first flow paths 5a to the other, with at least one first flow path 5a having a water-retaining layer 5c that protrudes closer to the finished surface 2 than all of the second flow paths 5b1 connected to that first flow path 5a. With this configuration, the fire resistance of the finished surface 2 can be improved by water retained in the water-retaining layer 5c by passing water through the parallel flow paths 5.

[0086] The first flow path group 5A includes a first discharge flow path 5a1 that does not have a water-retaining layer 5c but has an outlet 6a as the first flow path 5a, and a first water-retaining flow path 5a2 that does not have an outlet 6a but has a water-retaining layer 5c as the first flow path 5a. According to the above configuration, by passing water through the parallel flow paths 5, water is discharged from the outlet 6a of the first discharge flow path 5a1, thereby cooling the finished surface 2, and water retained in the water-retaining layer 5c of the first water-retaining flow path 5a2 can increase the fire resistance of the finished surface 2.

[0087] The parallel flow paths 5 have a discharge port group 6 made up of a plurality of discharge ports 6a aligned along the first discharge flow paths 5a1, corresponding to each of the first discharge flow paths 5a1. The plurality of discharge ports 6a can be configured to be aligned at equal intervals as shown in FIG.

[0088] The construction timber 1 has boards 9 with grooves 8 that form parallel flow paths 5, and is formed by cross-laminated timber 14. The boards 9 in the form of lumber are joined to the cross-laminated timber 14. Alternatively, the boards 9 in the form of lumber may be joined to the cross-laminated timber 14.

[0089] The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a. The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a and a groove 8 that forms the second flow path 5b1. The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a and a plurality of grooves 8 that form the plurality of second flow paths 5b1.

[0090] In this embodiment, the fire-resistant wooden structure 13 includes a building timber 1 .

[0091] Seventh Embodiment As shown in Figures 21 to 23, in the seventh embodiment of the present invention, a building timber 1 has a finished surface 2 and a fire-resistant flow path 3, and the fire-resistant flow path 3 has an inlet 4, a hollow parallel flow path 5 that communicates with the inlet 4 and extends parallel to the finished surface 2, and an outlet 6a that communicates with the parallel flow path 5 and opens to the finished surface 2, so that water passed through the inlet 4 in the event of a fire can be discharged from the outlet 6a through the parallel flow path 5.

[0092] The building timber 1 can retain water flowing through the fire resistance flow channel 3. The building timber 1 can retain water flowing through the fire resistance flow channel 3 at its finished surface 2. The building timber 1 can absorb water flowing through the fire resistance flow channel 3 through the surfaces of the parallel flow channels 5.

[0093] The inlet 4 is provided on the surface 7 opposite to the finishing surface 2. The inlet 4 may be configured to be provided on the finishing surface 2.

[0094] The parallel flow paths 5 have a plurality of first flow paths 5a that are aligned along the finishing surface 2, are parallel to each other, and extend parallel to the finishing surface 2, and a flow path connection portion 5b that connects all of the first flow paths 5a to each other. The flow path connection portion 5b has second flow paths 5b1 that are aligned along the finishing surface 2 and extend parallel to the finishing surface 2 from one end of the plurality of first flow paths 5a to the other. The flow path connection portion 5b has a plurality of second flow paths 5b1 that are aligned along the finishing surface 2.

[0095] The parallel flow paths 5 include a first flow path group 5A consisting of a plurality of first flow paths 5a aligned along the finished surface 2, parallel to each other, and extending parallel to the finished surface 2, with the inner ends of the outlets 6a opening, and a second flow path group 5B1 consisting of a plurality of second flow paths 5b1 aligned along the finished surface 2 and extending parallel to the finished surface 2 from one end of the plurality of first flow paths 5a to the other, with at least one first flow path 5a having a water-retaining layer 5c that protrudes toward the finished surface 2 more than all of the second flow paths 5b1 that are connected to the first flow path 5a. Each first flow path 5a has a water-retaining layer 5c that protrudes toward the finished surface 2 more than all of the second flow paths 5b1 that are connected to the first flow path 5a.

[0096] The first flow path group 5A includes a first flow path 5a for draining accumulated water, which includes a water-retaining layer 5c and an outlet 6a. According to the above configuration, water is passed through the parallel flow paths 5, and discharged from the outlet 6a of the first flow path 5a3 for draining accumulated water, thereby cooling the finished surface 2. At the same time, the fire resistance of the finished surface 2 can be enhanced by the water retained in the water-retaining layer 5c of the first flow path 5a3 for draining accumulated water. The multiple first flow paths 5a are arranged vertically, and the first flow path group 5A includes a first flow path 5a3 for draining accumulated water only at the upper end of the building timber 1. The first flow path group 5A includes only one first flow path 5a3 for draining accumulated water, located only at the top of the building timber 1. According to the above configuration, the entire finished surface 2 can be efficiently cooled by draining water from the outlet 6a of the first flow path 5a3 for draining accumulated water with a small amount of water passing through. In this embodiment, the building timber 1 is used as a wall material, but it may also be used as a ceiling material or floor material. That is, the finishing surface 2 may be used in a horizontal state, for example. The number and arrangement of the first accumulated water discharge flow paths 5a3 provided in the first flow path group 5A can be set according to the conditions.

[0097] The parallel flow paths 5 have a group of outlets 6 made up of a plurality of outlets 6a aligned along the first flow path 5a3 for discharging accumulated water, corresponding to the first flow path 5a3 for discharging accumulated water. The plurality of outlets 6a can be arranged at equal intervals, for example, as shown in Fig. 22. The number and arrangement of the outlets 6a in the group of outlets 6 can be set according to the conditions.

[0098] The timber for construction 1 has boards 9 with grooves 8 that form parallel flow paths 5, and is formed by cross-laminated lumber 14. The boards 9 as sawn lumber are joined to the cross-laminated lumber 14.

[0099] The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a. The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a and a groove 8 that forms the second flow path 5b1. The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a and a plurality of grooves 8 that form the plurality of second flow paths 5b1.

[0100] In this embodiment, the fire-resistant wooden structure 13 includes a building timber 1 .

[0101] Eighth Embodiment As shown in Figures 24 to 26, in the eighth embodiment of the present invention, a building timber 1 has a finished surface 2 and a fire-resistant flow path 3, and the fire-resistant flow path 3 has an inlet 4, a hollow parallel flow path 5 that communicates with the inlet 4 and extends parallel to the finished surface 2, and an outlet 6a that communicates with the parallel flow path 5 and opens to the finished surface 2, so that water passed through the inlet 4 in the event of a fire can be discharged from the outlet 6a through the parallel flow path 5.

[0102] The building timber 1 can retain water flowing through the fire resistance flow channel 3. The building timber 1 can retain water flowing through the fire resistance flow channel 3 at its finished surface 2. The building timber 1 can absorb water flowing through the fire resistance flow channel 3 through the surfaces of the parallel flow channels 5.

[0103] The inlet 4 is provided on the surface 7 opposite to the finishing surface 2. The inlet 4 may be configured to be provided on the finishing surface 2.

[0104] The parallel flow paths 5 have a plurality of first flow paths 5a that are aligned along the finishing surface 2, are parallel to each other, and extend parallel to the finishing surface 2, and a flow path connection portion 5b that connects all of the first flow paths 5a to each other. The flow path connection portion 5b has second flow paths 5b1 that are aligned along the finishing surface 2 and extend parallel to the finishing surface 2 from one end of the plurality of first flow paths 5a to the other. The flow path connection portion 5b has a plurality of second flow paths 5b1 that are aligned along the finishing surface 2.

[0105] The parallel flow paths 5 include a first flow path group 5A consisting of multiple first flow paths 5a aligned along the finished surface 2, parallel to each other, and extending parallel to the finished surface 2, with the inner ends of the outlets 6a opening, and a second flow path group 5B1 consisting of multiple second flow paths 5b1 aligned along the finished surface 2 and extending parallel to the finished surface 2 from one end of the multiple first flow paths 5a to the other, with at least one second flow path 5b1 having a water-retaining layer 5c extending toward the finished surface 2 further than all of the first flow paths 5a connected to that second flow path 5b1. Each second flow path 5b1 has a water-retaining layer 5c extending toward the finished surface 2 further than all of the first flow paths 5a connected to that second flow path 5b1. With this configuration, the fire resistance of the finished surface 2 can be improved by water retained in the water-retaining layer 5c when water is passed through the parallel flow paths 5.

[0106] The first flow path group 5A includes a first discharge flow path 5a1 that does not have a water-retaining layer 5c and has a discharge port 6a as the first flow path 5a. The multiple first flow paths 5a are arranged vertically, and the first flow path group 5A has a first discharge flow path 5a1 only at the upper end of the building timber 1. The first flow path group 5A has only one first discharge flow path 5a1 only at the top of the building timber 1. This configuration allows the entire finished surface 2 to be efficiently cooled by discharging water from the discharge port 6a of the first discharge flow path 5a1 with a small amount of water flow. In this embodiment, the building timber 1 is used as a wall material, but it may also be used as a ceiling material or floor material. That is, the finished surface 2 may be used horizontally, for example. The number and arrangement of the first discharge flow paths 5a1 provided in the first flow path group 5A can be determined according to the conditions.

[0107] The parallel flow path 5 has a discharge port group 6 consisting of a plurality of discharge ports 6a aligned along the first discharge flow path 5a1 in correspondence with the first discharge flow path 5a1. The number and arrangement of the discharge ports 6a provided in the discharge port group 6 can be set according to the conditions.

[0108] The timber for construction 1 has boards 9 with grooves 8 that form parallel flow paths 5, and is formed by cross-laminated lumber 14. The boards 9 as sawn lumber are joined to the cross-laminated lumber 14.

[0109] The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a. The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a and a groove 8 that forms the second flow path 5b1. The plate 9 has a plurality of grooves 8 that form the plurality of first flow paths 5a and a plurality of grooves 8 that form the plurality of second flow paths 5b1.

[0110] In this embodiment, the fire-resistant wooden structure 13 includes a building timber 1 .

[0111] Ninth Embodiment As shown in Figures 27 to 30, in the ninth embodiment of the present invention, a building timber 1 has a finished surface 2 and a fire-resistant flow path 3, and the fire-resistant flow path 3 has an inlet 4 (first inlet 4'), a hollow parallel flow path 5 (first parallel flow path 5') that communicates with the inlet 4 and extends parallel to the finished surface 2, and an outlet 6a (first outlet 6a') that communicates with the parallel flow path 5 and opens to the finished surface 2, and in the event of a fire, water passed through the inlet 4 can be discharged from the outlet 6a through the parallel flow path 5.

[0112] The building timber 1 can retain water flowing through the fire resistance flow channel 3. The building timber 1 can retain water flowing through the fire resistance flow channel 3 at its finished surface 2. The building timber 1 can absorb water flowing through the fire resistance flow channel 3 through the surfaces of the parallel flow channels 5.

[0113] The inlet 4 is provided on the surface 7 opposite to the finishing surface 2. The inlet 4 may be configured to be provided on the finishing surface 2.

[0114] The parallel flow paths 5 have a plurality of first flow paths 5a that are aligned along the finishing surface 2, are parallel to each other, and extend parallel to the finishing surface 2, and a flow path connection portion 5b that connects all of the first flow paths 5a to each other. The flow path connection portion 5b has second flow paths 5b1 that are aligned along the finishing surface 2 and extend parallel to the finishing surface 2 from one end of the plurality of first flow paths 5a to the other. The flow path connection portion 5b has a plurality of second flow paths 5b1 that are aligned along the finishing surface 2.

[0115] The parallel flow paths 5 include a first flow path group 5A consisting of multiple first flow paths 5a aligned along the finished surface 2, parallel to each other, and extending parallel to the finished surface 2, with the inner ends of the outlets 6a opening, and a second flow path group 5B1 consisting of multiple second flow paths 5b1 aligned along the finished surface 2 and extending parallel to the finished surface 2 from one end of the multiple first flow paths 5a to the other, with at least one second flow path 5b1 having a water-retaining layer 5c extending toward the finished surface 2 further than all of the first flow paths 5a connected to that second flow path 5b1. Each second flow path 5b1 has a water-retaining layer 5c extending toward the finished surface 2 further than all of the first flow paths 5a connected to that second flow path 5b1. With this configuration, the fire resistance of the finished surface 2 can be improved by water retained in the water-retaining layer 5c when water is passed through the parallel flow paths 5.

[0116] The first flow path group 5A includes a first discharge flow path 5a1 that does not have a water-retaining layer 5c and has a discharge port 6a as the first flow path 5a. The first flow path group 5A includes a plurality of first discharge flow paths 5a1. The plurality of first discharge flow paths 5a1 are arranged in a vertical direction. The parallel flow paths 5 include a discharge port group 6 that includes a plurality of discharge ports 6a aligned along the first discharge flow path 5a1, corresponding to each first discharge flow path 5a1.

[0117] The fire-resistant flow path 3 has a second inlet 4", a hollow second parallel flow path 5" that communicates with the second inlet 4" and extends parallel to the finished surface 2 on the opposite side of the finished surface 2 from the first parallel flow path 5', and a second outlet 6a" that communicates with the second parallel flow path 5" and opens on the finished surface 2. In the event of a fire, water passed through the second inlet 4" can be discharged from the second outlet 6a" through the second parallel flow path 5". With this configuration, the finished surface 2 can be cooled not only by the first parallel flow path 5' but also by the second parallel flow path 5", further improving fire resistance. In addition, since the second parallel flow path 5" is located on the opposite side of the finished surface from the first parallel flow path 5' having the aquifer 5c, the aquifer 5c of the first parallel flow path 5' can be located closer to the finished surface 2, further improving fire resistance. The second parallel flow path 5'' may be configured to communicate with the second inlet 4'' and extend parallel to the finishing surface 2 on the finishing surface 2 side of the first parallel flow path 5'.

[0118] The second parallel flow paths 5" have a plurality of first flow paths 5a that are aligned along the finishing surface 2, are parallel to each other, and extend parallel to the finishing surface 2, and a flow path connection portion 5b that connects all of the first flow paths 5a to each other. The flow path connection portion 5b of the second parallel flow paths 5" has second flow paths 5b1 that are aligned along the finishing surface 2 and extend parallel to the finishing surface 2 from one end of the plurality of first flow paths 5a of the second parallel flow paths 5". The flow path connection portion 5b of the second parallel flow paths 5" has a plurality of second flow paths 5b1 that are aligned along the finishing surface 2.

[0119] The second parallel flow paths 5" have a first flow path group 5A consisting of a plurality of first flow paths 5a aligned along the finished surface 2, parallel to each other, and extending parallel to the finished surface 2, with the inner ends of the second outlets 6a" opening, and a second flow path group 5B1 consisting of a plurality of second flow paths 5b1 aligned along the finished surface 2 and extending parallel to the finished surface 2 from one end of the plurality of first flow paths 5a to the other. The first flow path group 5A of the second parallel flow paths 5" has a first discharge flow path 5a1 as the first flow path 5a, which does not have a water-retaining layer 5c and has a second outlet 6a". The first flow path group 5A of the second parallel flow paths 5" has a plurality of first discharge flow paths 5a1. The plurality of first discharge flow paths 5a1 of the second parallel flow paths 5" are arranged horizontally. The second parallel flow paths 5" have an outlet group 6 consisting of a plurality of second outlets 6a" aligned along the first discharge flow path 5a1, corresponding to each first discharge flow path 5a1.

[0120] The second inlet 4 ″ is provided on the finished surface 2 of the timber for construction 1 . The second inlet 4 ″ may be provided on the surface 7 opposite to the finished surface 2 .

[0121] The building timber 1 has a first layer of boards 9 having grooves 8 that form first parallel flow paths 5' and a second layer of boards 9 having grooves 8 that form second parallel flow paths 5", and is formed by cross-laminated timber 14. The first layer of boards 9, which are sawn lumber, are joined to the second layer of boards 9, which are also sawn lumber. The second layer of boards 9 are joined to the cross-laminated timber 14.

[0122] The first layer plate 9 has a groove 8 that forms a part of the first parallel flow path 5'. The first layer plate 9 has a plurality of grooves 8 that form a part of the plurality of first flow paths 5a of the first parallel flow path 5'. The first layer plate 9 has a plurality of grooves 8 that form a part of the plurality of second flow paths 5b1 of the first parallel flow path 5'. With the above configuration, the first parallel flow path 5' can be easily realized.

[0123] The second layer plate 9 has grooves 8 that form part of the second parallel flow path 5". The second layer plate 9 has a plurality of grooves 8 that form part of the plurality of first flow paths 5a of the second parallel flow path 5". The second layer plate 9 has a plurality of grooves 8 that form part of the plurality of second flow paths 5b1 of the second parallel flow path 5". With the above configuration, the second parallel flow path 5" can be easily realized.

[0124] In this embodiment, the fire-resistant wooden structure 13 includes a building timber 1 .

[0125] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the above-described embodiments can be modified in various ways without departing from the gist of the present invention.

[0126] For example, the building timber 1 may have a board 9 with grooves 8 forming parallel flow paths 5, and may be formed from lumber, laminated veneer lumber, plywood, glued laminated timber 10, cross-laminated timber 14, or any combination thereof. The building timber 1 may have a finished surface 2 on both sides. When fire resistance is required on both sides, for example, the building timber 1 may have a first finished surface 2, a first fire-resistant flow path 3, a second finished surface 2 which is the surface 7 opposite to the first finished surface 2, and a second fire-resistant flow path 3, and the first fire-resistant flow path 3 has a first inlet 4, a hollow first parallel flow path 5 which communicates with the first inlet 4 and extends parallel to the first finished surface 2, and a first outlet 6a which communicates with the first parallel flow path 5 and opens to the first finished surface 2, so that the first inlet 4 is used to discharge fire in the event of a fire. The water passed through the inlet 4 can be discharged from the first outlet 6a through the first parallel flow path 5, and the second fire-resistant flow path 3 can have a second inlet 4, a hollow second parallel flow path 5 that communicates with the second inlet 4 and extends parallel to the second finished surface 2, and a second outlet 6a that communicates with the second parallel flow path 5 and opens to the second finished surface 2, so that in the event of a fire, water passed through the second inlet 4 can be discharged from the second outlet 6a through the second parallel flow path 5. [Explanation of symbols]

[0127] 1 Architectural wood 2 Finished surface 3 Fireproof channel 4 Introduction 4' First inlet 4" Second Inlet 5 Parallel flow paths 5' First parallel channel 5" Second parallel flow path 5a First flow path 5A First flow path group 5a1 First discharge flow path 5a2 First flow path for retained water 5a3 First flow path for draining accumulated water 5b Flow path connection part 5b1 Second flow path 5B1 Second flow path group 5c aqueous layer 6 Outlet group 6a Outlet 6a' First outlet 6a” Secondary Outlet 7 surface 8 grooves 9 boards 10 Laminated wood 11 Through holes 12 Plug body 13 Wooden fireproof structure 14 Cross-laminated timber

Claims

1. having a finished surface and a refractory channel; The fire-resistant flow path has an inlet, a hollow parallel flow path that is connected to the inlet and extends parallel to the finished surface, and an outlet that is connected to the parallel flow path and opens to the finished surface, so that water that is passed through the inlet in the event of a fire can be discharged from the outlet through the parallel flow path, The building timber has plates with grooves that form the parallel flow paths and is formed by laminated timber or cross-laminated timber.

2. 2. The construction lumber of claim 1, capable of retaining water flowing through said fire-resistant channels.

3. 3. The building lumber of claim 2, wherein said facing surface is capable of retaining water flowing through said fire-resistant channels.

4. The building timber according to claim 2, wherein the water flowing through the fire-resistant flow channels can be absorbed through the surfaces of the parallel flow channels.

5. The lumber for construction according to claim 1 , wherein the inlet is provided on the surface opposite to the finished surface or on the finished surface.

6. The building timber according to claim 1, wherein the parallel flow paths have a plurality of first flow paths that are aligned along the finished surface, are parallel to each other, and extend parallel to the finished surface, and a flow path connecting portion that connects all of the first flow paths to each other.

7. The building timber according to claim 6, wherein the flow path connecting portion has second flow paths aligned along the finished surface and extending parallel to the finished surface from one end to the other of the plurality of first flow paths.

8. The building timber according to claim 6, wherein the parallel flow paths have a group of outlets, each of the outlets corresponding to each of the first flow paths, and each of the outlets is arranged along the first flow path.

9. The parallel flow paths include a first flow path group consisting of a plurality of first flow paths that are aligned along the finishing surface, are parallel to one another, and extend parallel to the finishing surface, and have inner ends of the discharge outlets that open therein; and a second flow path group consisting of a plurality of second flow paths that are aligned along the finishing surface and extend parallel to the finishing surface from end to end of the plurality of first flow paths, 2. The building timber of claim 1, wherein at least one of the first flow paths has a water-retaining layer that protrudes closer to the finished surface than all of the second flow paths connected to the first flow path, or at least one of the second flow paths has a water-retaining layer that protrudes closer to the finished surface than all of the first flow paths connected to the second flow path.

10. The building timber described in claim 9, wherein the first flow path group includes a first discharge flow path having the discharge outlet without the water-retaining layer as the first flow path, and a first water-retaining flow path having the water-retaining layer without the discharge outlet as the first flow path.

11. The building timber according to claim 9 , wherein the first flow path group includes a first flow path for draining retained water, the first flow path including the retained water layer and the drain outlet.

12. The building timber according to claim 9, wherein the second flow path group includes a second water-retaining flow path that does not have the outlet but has the water-retaining layer as the second flow path.

13. The building timber described in claim 9, wherein the fire-resistant flow path has a second inlet, a hollow second parallel flow path that communicates with the second inlet and extends parallel to the finished surface on the opposite side of the finished surface or the side of the finished surface relative to the parallel flow path, and a second outlet that communicates with the second parallel flow path and opens to the finished surface, and in the event of a fire, water passed through the second inlet can be discharged from the second outlet through the second parallel flow path.

14. The building timber according to claim 13, wherein the second inlet is provided on an outer surface of the building timber.

15. A fire-resistant wooden structure comprising the wooden material for construction according to claim 1.

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