Column and beam material and method for forming column and beam material

Abstract

To provide a lightweight column-beam material that can suppress decrease in strength against compression in the longitudinal direction of the column-beam material, and can suppress decrease in strength against bending of the column-beam material.SOLUTION: A column-beam material such as a column 11 and a beam 12 has bodies 11a, 12a constructed with reinforced concrete with a defined length. A wood material 16 is embedded in concrete 13 of the bodies 11a, 12a. The wood material 16 extends in the longitudinal direction of the bodies 11a, 12a. Since the wood material 16 is embedded in the concrete 13 of the bodies 11a, 12a in this way so as to extend in the longitudinal direction of the bodes 11a, 12a, it is possible to reduce the weight of the column 11 and the beam 12. Furthermore, by the wood material 16, it is possible to suppress reduction in strength against compression in the longitudinal of the column 11 and also suppress reduction in strength against bending of the column 11 and the beam 12.SELECTED DRAWING: Figure 1

Description

Technical Field

[0006] , , , ,

[0001] The present invention relates to a column-beam member and a method for forming the column-beam member.

Background Art

[0002] Patent Document 1 describes that a slab of a building is made of reinforced concrete and a wooden material is embedded in the slab. Specifically, a plurality of wooden materials are embedded in the concrete of the slab at a predetermined interval. Since the amount of concrete used for the slab can be reduced by embedding the wooden material in the concrete in this way, the slab can be lightened.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a building, a column-beam member made of reinforced concrete is used as a column or a beam. Regarding such column-beam members, not only weight reduction is desired, but also suppression of a decrease in strength accompanying weight reduction is desired, and there is room for improvement in that regard.

Means for Solving the Problems

[0005] Next, each aspect of a column-beam member and a method for forming the column-beam member that solve the above problems will be described. (Aspect 1) A column-beam member having a main body made of reinforced concrete with a determined length, wherein a wooden material is embedded in the concrete of the main body, and the wooden material extends in the longitudinal direction of the main body.

[0006] According to the above configuration, wood material is embedded in the concrete body of the column and beam so as to extend in the longitudinal direction of the body. This reduces the weight of the column and beam. Furthermore, it is possible to suppress the reduction in compressive strength in the longitudinal direction of the column and beam used as a column, and to suppress the reduction in bending strength of the column and beam used as both a column and a beam.

[0007] (Aspect 2) The aforementioned wooden material extends along the entire longitudinal direction of the main body (the column / beam material as described in Embodiment 1).

[0008] This configuration makes it possible to more effectively suppress the reduction in compressive strength of column-beam materials used as columns in the longitudinal direction, as well as the reduction in bending strength of column-beam materials used as columns and beams.

[0009] (Aspect 3) The wood material is a laminated timber formed by stacking a plurality of boards extending in the longitudinal direction of the main body in the thickness direction, as described in (Aspect 1) or (Aspect 2).

[0010] This configuration suppresses the reduction in compressive strength of the wood material in the longitudinal direction, as well as the reduction in bending strength of the wood material. As a result, the reduction in compressive strength of column and beam materials used as columns is suppressed in the longitudinal direction. Furthermore, the reduction in bending strength of column and beam materials used as columns and beams is suppressed.

[0011] (Aspect 4) The wood material has a square cross-section when cut in the width direction, and the wood material has cut portions formed by cutting its corners, as described in any one of (Aspect 1) to (Aspect 3).

[0012] When forming the column and beam members (main body), reinforcing bars and wood materials are placed inside the formwork, and then concrete is poured into the formwork. If the cross-section of the wood material when cut in the width direction is square, as described above, it becomes difficult to pour concrete into the formwork at the corners of the wood material. With the above configuration, cut sections are formed on the wood material by cutting off its corners. These cut sections prevent the difficulty in pouring concrete into the formwork at the corners of the wood material.

[0013] (Appendix 5) The column and beam material according to any one of (Aspect 1) to (Aspect 4), wherein the surface of the main body of the wood material that is in contact with the concrete has a structure that strengthens the bond with the concrete.

[0014] This configuration allows for a stronger integration of concrete and wood materials in the column and beam components. (Aspect 6) A column or beam material according to any one of (Aspect 1) to (Aspect 5), wherein a waterproof layer is formed on the outer surface of the wood material to suppress water penetration from the concrete side to the wood material side.

[0015] With this configuration, water penetration from the concrete into the wood material is suppressed by the waterproof layer, so when the concrete forming the main body of the column and beam material hardens, the water contained in the concrete is prevented from being drawn away by the wood material. Therefore, it is possible to prevent poor setting and hardening of the concrete due to insufficient moisture when the concrete forming the main body of the column and beam material hardens. Furthermore, it is possible to prevent a decrease in the strength and durability of the concrete that occurs due to poor setting and hardening of the concrete.

[0016] (Aspect 7) A column / beam material according to any one of (Aspect 1) to (Aspect 6), wherein a positioning member for positioning the wood material is embedded in the concrete.

[0017] When forming the main body of the above column and beam member, steel bars are arranged in the formwork and the wood material is arranged so as to extend in the longitudinal direction of the main body, and then concrete is poured into the formwork. According to the above configuration, before pouring concrete into the formwork, a positioning member for determining the position of the wood material in the formwork is arranged in the formwork. Therefore, after the concrete is poured into the formwork, the positioning member can suppress the wood material from floating up with respect to the concrete.

[0018] (Aspect 8) A method for forming a column and beam member applied to a column and beam member having a main body made of reinforced concrete with a determined length, in which steel bars are arranged in a formwork and a wood material is arranged so as to extend in the longitudinal direction of the main body, and after arranging a positioning member for determining the position of the wood material in the formwork in the formwork, concrete is poured into the formwork.

[0019] According to this method, after the concrete is poured into the formwork, the positioning member can suppress the wood material from floating up with respect to the concrete.

Brief Description of the Drawings

[0020] [Figure 1] It is a perspective view showing the columns and beams of the building in the first embodiment. [Figure 2] It is a cross-sectional view of the above column and the above beam as seen from the direction of arrow II-II in FIG. 1. [Figure 3] It is a cross-sectional view of the above column as seen from the direction of III-III in FIG. 2. [Figure 4] It is a cross-sectional view of the above beam as seen from the direction of IV-IV in FIG. 2. [Figure 5] It is a cross-sectional view showing the column in the second embodiment. [Figure 6] It is a cross-sectional view showing the beam in the second embodiment. [Figure 7] It is a plan view showing the wood material of the column in the third embodiment. [Figure 8] It is a side view showing the above wood material. [Figure 9] This is a side view showing a beam in the third embodiment. [Figure 10] This is a top and bottom view showing the beam mentioned above. [Figure 11] This is a side view showing the beam mentioned above. [Figure 12] This is a cross-sectional view showing a column in the fourth embodiment. [Figure 13] This is a cross-sectional view showing a beam in the fourth embodiment. [Figure 14] This is a cross-sectional view showing a beam in the fifth embodiment. [Figure 15] This is a plan view showing another example of wood-based materials. [Figure 16] This is a side view showing the above-mentioned wood material. [Figure 17] This is a side view showing another example of wood-based timber. [Figure 18] These are top and bottom views of the above-mentioned wood material. [Figure 19] This is a side view showing the above-mentioned wood material. [Figure 20] This is a cross-sectional view showing another example of wood material used for pillars. [Figure 21] This is a cross-sectional view showing another example of wood material used for pillars. [Figure 22] This is a cross-sectional view showing another example of wood material used for pillars. [Figure 23] This is a cross-sectional view showing another example of wood material used for beams. [Figure 24] This is a cross-sectional view showing another example of wood material used for beams. [Figure 25] This is a cross-sectional view showing another example of wood material used for beams. [Figure 26] This is a cross-sectional view showing another example of a beam. [Figure 27] This is a cross-sectional view showing another example of a beam. [Figure 28] This is a cross-sectional view showing another example of a beam. [Figure 29] This is a cross-sectional view showing another example of a beam. [Figure 30] This is a cross-sectional view showing another example of a beam. [Modes for carrying out the invention]

[0021] [First Embodiment] An embodiment of a column-beam structure will be described below with reference to Figures 1 to 4. As shown in Figure 1, the building uses column and beam members such as columns 11 and beams 12. Columns 11 extend vertically. Beams 12 extend horizontally. Beams 12 are connected to columns 11. Columns 11 have a reinforced concrete body 11a. Beams 12 have a reinforced concrete body 12a. The bodies 11a and 12a each consist of concrete 13, reinforcing bars 14 and 15, and wood material 16.

[0022] The wooden members 16 of the main body 11a extend in the longitudinal direction of the column 11 (main body 11a). More specifically, the wooden members 16 of the main body 11a extend along the entire longitudinal direction of the main body 11a. The wooden members 16 of the main body 12a extend in the longitudinal direction of the beam 12 (main body 12a). More specifically, the wooden members 16 of the main body 12a extend along the entire longitudinal direction of the main body 12a.

[0023] Numerous reinforcing bars 14 and 15 are arranged around the wooden material 16. The reinforcing bars 14 extend parallel to each other at predetermined intervals. The reinforcing bars 14 extend in the longitudinal direction of the wooden material 16. The reinforcing bars 15 extend parallel to each other at predetermined intervals. The reinforcing bars 15 extend in a direction perpendicular to the reinforcing bars 14 and surrounding the wooden material 16. The wooden material 16 and the reinforcing bars 14 and 15 are embedded in concrete 13 to form the main body 11a of the column 11 and the main body 12a of the beam 12.

[0024] <Wood material 16> As the wood-based material 16, it is conceivable to use laminated timber. In this case, the wood-based material 16 is formed by a large number of boards 17. The boards 17 are formed from wood-based materials. The boards 17 extend in the longitudinal direction of the main body 11a, 12a. The wood-based material 16 is formed by stacking these boards 17 in the thickness direction. As the wood-based material 16, cross-laminated timber (CLT) or laminated veneer lumber (LVL) can also be used.

[0025] <Joint 18 between column 11 and beam 12> As shown in Figure 2, there is no wood material 16 at the joint 18 between the column 11 and the beam 12, that is, at the point where the column 11 and the beam 12 intersect. Therefore, the joint 18 is formed by concrete 13 and reinforcing bars 14 and 15.

[0026] <Cross section of column 11 and beam 12> As shown in Figure 3, the cross-section of column 11 when cut in the width direction (horizontal direction) is approximately square. The cross-section of the wooden material 16 of column 11 when cut in the width direction is also approximately square. These cross-sections are not necessarily approximately square, and may be approximately rectangular. The reinforcing bars 14 and 15 arranged around the wooden material 16 are embedded in concrete 13. As shown in Figure 4, the cross-section of beam 12 when cut in the width direction (vertical direction) is approximately rectangular. The cross-section of the wooden material 16 of beam 12 when cut in the width direction is also approximately rectangular. The reinforcing bars 14 and 15 arranged around the wooden material 16 are embedded in concrete 13.

[0027] Next, the effects and benefits of the column and beam materials, such as the column 11 and beam 12, in this embodiment will be explained. (1-1) Because the wooden material 16 is embedded in the concrete 13 of the main bodies 11a and 12a of the columns 11 and beams 12, the columns 11 and beams 12 can be made lighter. As a result of making the columns 11 and beams 12 lighter, the acceleration of the building due to shaking during an earthquake is reduced.

[0028] (1-2) Wood material 16 is embedded in the concrete 13 of the main bodies 11a and 12a of the column 11 and beam 12 so as to extend in the longitudinal direction of the main bodies 11a and 12a. This makes it possible to suppress the reduction in compressive strength of the column 11 in the longitudinal direction, and also to suppress the reduction in bending strength of the column 11 and beam 12.

[0029] (1-3) The wood material 16 extends throughout the entire longitudinal direction of the main body 11a and 12a within the concrete 13. Therefore, the effect of (1-2) described above becomes more pronounced. (1-4) As the wood material 16, laminated timber is used, which is formed by stacking multiple boards 17 extending in the longitudinal direction of the main body 11a, 12a in the thickness direction. By using such laminated timber as the wood material 16, the manufacturing cost of the wood material 16 can be kept low. Furthermore, the reduction in the compressive strength of the wood material 16 in the longitudinal direction can be suppressed, as can the reduction in the bending strength of the wood material 16. As a result, the reduction in the compressive strength of the column 11 in the longitudinal direction can be suppressed, and the reduction in the bending strength of the column 11 and beam 12 can be suppressed.

[0030] (1-5) By embedding wood material 16 in the concrete 13 of the columns 11 and beams 12, the amount of concrete 13 in the columns 11 and beams 12 can be reduced. As a result, carbon emissions when forming the columns 11 and beams 12 can be reduced.

[0031] (1-6) Since the concrete 13 and wood material 16 in the columns 11 and beams 12 are made of completely different materials, it is easy to separate and process the concrete 13 and wood material 16 when disposing of the columns 11 and beams 12.

[0032] (1-7) Since the entire timber material 16 is covered with concrete 13, even if timber material 16 is used for the columns 11 and beams 12, it is not necessary to consider the fire resistance performance of the columns 11 and beams 12. Furthermore, even if the timber material 16 undergoes aging changes, these changes will not be visible from the outside of the columns 11 and beams 12.

[0033] [Second Embodiment] Next, a second embodiment of the column and beam material will be described with reference to Figures 5 and 6. In this embodiment, the shapes of the cross-sections of the column 11 and beam 12 when cut in the width direction are different from those of the first embodiment.

[0034] As shown in Figure 5, the four corners of the wooden material 16 in the column 11 correspond to the corners of the main body 11a in the column 11. Cut portions 19 are formed on the wooden material 16 by cutting off its corners (four corners).

[0035] As shown in Figure 6, the four corners of the wooden material 16 in the beam 12 correspond to the corners of the main body 12a in the beam 12. Cut portions 20 are formed on the wooden material 16 by cutting off two of its corners. In this example, cut portions 20 are formed on the two lower corners of the wooden material 16 as shown in Figure 6.

[0036] According to this embodiment, in addition to the effects of the first embodiment, the following effects can be obtained. (2-1) When forming the main bodies 11a and 12a of the columns 11 and beams 12, reinforcing bars 14 and 15 and wood materials 16 are placed inside the formwork 21 and 22 (Figures 5 and 6) which have a rectangular interior shape, and then concrete 13 is poured into the formwork 21 and 22. This forms the rectangular columnar main bodies 11a and 12a.

[0037] If the cross-section of the wood material 16, when cut in the width direction, is square, then, as described above, it becomes difficult to pour the concrete 13 into the formwork 21 and 22, and the concrete 13 will not reach the corners of the wood material 16.

[0038] However, the wood material 16 has cut sections 19 and 20 formed on its corners. These cut sections 19 and 20 prevent the concrete 13 from becoming difficult to pour into the corners of the wood material 16 when pouring the concrete 13 into the formwork 21 and 22.

[0039] [Third Embodiment] Next, a third embodiment of the column and beam material will be described with reference to Figures 7 to 11. In this embodiment, the surface of the wood material 16 that comes into contact with the concrete 13 has a structure that strengthens the bond with the concrete 13, which is different from the first embodiment.

[0040] As shown in Figures 7 and 8, numerous coach screw bolts 27 are driven into the sides 23-26 of the wooden material 16 of the column 11. Sides 23-26 are the surfaces that come into contact with the concrete 13. The heads of the coach screw bolts 27 protrude from these sides 23-26. By driving numerous coach screw bolts 27 into the sides 23-26 in this way, the structure strengthens the connection between the sides 23-26 and the concrete 13. The coach screw bolts 27 are arranged in a row at predetermined intervals along the longitudinal direction of the column 11. Two rows of these coach screw bolts 27 are formed on each of the sides 23-26.

[0041] As shown in Figures 9 to 11, numerous coach screw bolts 27 are driven into the upper surface 28 and lower surface 29 of the wooden beam 12. The upper surface 28 and lower surface 29 are the surfaces that come into contact with the concrete 13. The heads of the coach screw bolts 27 protrude from these upper surface 28 and lower surface 29. By driving numerous coach screw bolts 27 into the upper surface 28 and lower surface 29 in this way, the structure strengthens the connection between the upper surface 28 and lower surface 29 and the concrete 13. The coach screw bolts 27 are arranged in a row at predetermined intervals along the longitudinal direction of the beam 12. Two rows of these coach screw bolts 27 are formed on each of the upper surface 28 and lower surface 29.

[0042] According to this embodiment, in addition to the effects of the first embodiment, the following effects can be obtained. (3-1) Numerous coach screw bolts 27 are driven into the sides 23-26 of the timber material 16 in the column 11, and into the upper surface 28 and lower surface 29 of the timber material 16 in the beam 12. This strengthens the connection between the sides 23-26 and the upper surface 28 and lower surface 29 and the concrete 13. As a result, the concrete 13 and the timber material 16 in the column 11 and beam 12 can be more firmly integrated.

[0043] [Fourth Embodiment] Next, a fourth embodiment of the column and beam material will be described with reference to Figures 12 and 13. As shown in Figures 12 and 13, this embodiment differs from the first embodiment in that a waterproof layer 32 is formed on the outer surface of the wood material 16. The waterproof layer 32 is intended to suppress water penetration from the concrete 13 side to the wood material 16 side and covers the entire outer surface of the wood material 16. From the viewpoint of workability, the waterproof layer 32 may be formed by, for example, a film-forming paint. The wood material 16 is then embedded in the concrete 13 with its entire outer surface covered by the waterproof layer 32.

[0044] According to this embodiment, in addition to the effects of the first embodiment, the following effects can be obtained. (4-1) Since the waterproof layer 32 prevents water from seeping from the concrete 13 into the wood material 16, when the concrete 13 forming the main bodies 11a and 12a of the column and beam material hardens, the water contained in the concrete 13 is prevented from being drawn away by the wood material 16. Therefore, it is possible to prevent poor setting and hardening of the concrete 13 due to insufficient moisture when the concrete 13 forming the main bodies 11a and 12a of the column and beam material hardens. Furthermore, it is possible to prevent a decrease in the strength and durability of the concrete 13 due to poor setting and hardening.

[0045] [Fifth Embodiment] Next, a fifth embodiment of the column and beam material and its formation method will be described with reference to Figure 14. Figure 14 shows a beam 12, which is a column-beam material in this embodiment. Spacers 33a, 33b, 34, and 35 are embedded in the concrete 13 of the main body 12a of this beam 12. The spacers 33a, 33b, 34, and 35 serve as positioning members for positioning the wood material 16 within the concrete 13.

[0046] When forming the main body 12a, reinforcing bars 14 and 15 are placed inside the formwork 22, and the wood material 16 is placed so as to extend in the longitudinal direction of the main body 12a. At this time, the reinforcing bars 14 and 15 are positioned relative to the formwork 22 by spacers 33a and 33b. The wood material 16 is positioned relative to the reinforcing bars 14 and 15 by spacer 34, and also positioned relative to the formwork 22 by spacer 35. After the reinforcing bars 14 and 15 and the wood material 16 are positioned inside the formwork 22 in this way, concrete 13 is poured into the formwork 22. This forms the main body 12a with spacers 33a, 33b, 34, and 35 embedded inside the concrete 13.

[0047] Furthermore, the main body 11a of the column 11 may be formed in the same way as the main body 12a of the beam 12, so that positioning members such as spacers can be embedded in the concrete 13 of the main body 11a.

[0048] According to this embodiment, in addition to the effects of the first embodiment, the following effects can be obtained. (5-1) Before pouring concrete 13 into the formwork 22, spacers 33a, 33b, 34, and 35 are placed inside the formwork 22 to determine the position of the wood material 16 within the formwork 22. Therefore, after the concrete 13 is poured into the formwork 22, the spacers 33a, 33b, 34, and 35 can prevent the wood material 16 from floating up relative to the concrete 13.

[0049] [Other embodiments] Furthermore, each of the above embodiments can be modified as follows, for example. The above embodiments and the following modifications can be combined and implemented to the extent that they do not contradict each other technically.

[0050] In the third embodiment, instead of driving coach screw bolts 27 into the side surfaces 23-26 and the top and bottom surfaces 28 and 29 of the wood material 16, recesses 30 and protrusions 31 may be formed as shown in Figures 15-19.

[0051] As shown in Figures 15 and 16, recesses 30 and protrusions 31 are alternately formed on the sides 23 to 26 of the wooden material 16 of the column 11 along the longitudinal direction of the column 11. By forming the recesses 30 and protrusions 31 on the sides 23 to 26 in this way, the structure strengthens the connection between the sides 23 to 26 and the concrete 13.

[0052] As shown in Figures 17 to 19, recesses 30 and protrusions 31 are alternately formed on the upper surface 28 and lower surface 29 of the wooden material 16 of the beam 12 along the longitudinal direction of the beam 12. By forming the recesses 30 and protrusions 31 on the upper surface 28 and lower surface 29 in this way, the structure strengthens the connection between the upper surface 28 and lower surface 29 and the concrete 13.

[0053] In the second embodiment, the number of cut portions 19, 20 formed at the four corners of the wood material 16 may be changed as appropriate. In the first embodiment, the shape of the cross-section when the wood material 16 of the column 11 is cut in the width direction may be appropriately changed. For example, as shown in Figure 20, the cross-section may be made circular.

[0054] In the first embodiment, as shown in Figures 21 and 22, a plurality of wooden members 16 may be provided on the column 11. In this case, reinforcing bars 15 may be passed between the plurality of wooden members 16 on the column 11.

[0055] In the first embodiment, the shape of the cross-section when the wooden material 16 of the beam 12 is cut in the width direction may be appropriately changed. For example, as shown in Figure 23, the cross-section may be made elliptical.

[0056] In the first embodiment, as shown in Figures 24 and 25, a plurality of wooden members 16 may be provided on the beam 12. In this case, reinforcing bars 15 may be passed between the plurality of wooden members 16 on the beam 12.

[0057] • The wood material 16 does not necessarily have to be laminated timber. The wooden material 16 does not necessarily have to extend along the entire longitudinal direction of the main bodies 11a and 12a of the column 11 and beam 12.

[0058] In the fourth embodiment, the waterproof layer 32 may be formed of a water-resistant waterproof tape or waterproof sheet. As shown in Figure 26, instead of embedding spacers 34 and 35 in the concrete 13 of the main body 12a as in the fifth embodiment, fixing brackets 36 as positioning members may be embedded. The fixing brackets 36 are fixed to the formwork 22 and the wood material 16 by screws 37 when forming the main body 12a. The screws 37 on the formwork 22 side are cut out from the main body 12a when the formwork 22 is removed after the main body 12a is formed.

[0059] As shown in Figure 27, instead of embedding spacers 34 and 35 in the concrete 13 of the main body 12a as in the fifth embodiment, screws 38 may be embedded as positioning members. The screws 38 penetrate the formwork 22 and are driven into the wood material 16 when forming the main body 12a. The heads of the screws 38 are cut off from the main body 12a when the formwork 22 is removed after the main body 12a is formed.

[0060] As shown in Figure 28, instead of embedding spacers 34 and 35 in the concrete 13 of the main body 12a as in the fifth embodiment, separators 39 may be embedded as positioning members. The separators 39 are positioned to penetrate the formwork 22 and the wood material 16 when forming the main body 12a. The longitudinal ends of the separators 39 are cut off from the main body 12a when the formwork 22 is removed after the main body 12a is formed.

[0061] As shown in Figure 29, instead of embedding spacers 34 and 35 as in the fifth embodiment into the concrete 13 of the main body 12a, separators 40 as positioning members may be embedded. When forming the main body 12a, the separators 40 penetrate the formwork 22 and are driven into the wood material 16. The end of the separator 40 on the formwork 22 side is cut off from the main body 12a when the formwork 22 is removed after the main body 12a has been formed.

[0062] As shown in Figure 30, instead of embedding spacers 34 and 35 as in the fifth embodiment into the concrete 13 of the main body 12a, a separator 41 as a positioning member may be embedded. When forming the main body 12a, the separator 41 penetrates the formwork 22 and is fixed to the wood material 16 by screws 42. The end of the separator 41 on the formwork 22 side is cut off from the main body 12a when the formwork 22 is removed after the main body 12a is formed. [Explanation of symbols]

[0063] 11… Pillar 11a...Main unit 12...beam 12a...Main unit 13…Concrete 14…reinforcement bars 15…reinforcement bars 16…Wood material 17...Plate material 18…Joint part 19...Cutting part 20...Cutting part 21, 22… formwork 23-26... Side view 27… Coach screw bolt 28…Top surface 29…Bottom surface 30…recess 31…Convex part 32…Waterproof layer 33a, 33b, 34, 35… Spacers 36… Fixing brackets 37...bis 38...bis 39, 40, 41… Separators 42...bis

Claims

1. A column or beam material having a reinforced concrete body of a specified length, Wooden material is embedded in the concrete of the main body. The aforementioned wood material extends in the longitudinal direction of the main body, and when cut in the width direction, its cross-section is rectangular. The aforementioned wooden material has a cut section formed by cutting its corners, which is used for columns and beams.

2. The column and beam material according to claim 1, wherein the wood material extends over the entire longitudinal direction of the main body.

3. The column and beam material according to claim 1 or 2, wherein the wood material is a laminated timber formed by stacking a plurality of boards extending in the longitudinal direction of the main body in the thickness direction.

4. The column and beam material according to claim 1 or 2, wherein the surface of the wood material that comes into contact with the concrete has a structure that strengthens the bond with the concrete.

5. The column and beam material according to claim 1 or 2, wherein a waterproof layer is formed on the outer surface of the wood material to suppress water penetration from the concrete side to the wood material side.

6. The column and beam material according to claim 1 or 2, wherein a positioning member for positioning the wood material is embedded in the concrete.

7. It has a reinforced concrete body of a specified length and is applied to column or beam members that form columns or beams. Reinforcing bars are placed within the formwork, and wooden materials are arranged to extend in the longitudinal direction of the main body. The aforementioned wood material extends in the longitudinal direction of the main body, and when cut in the width direction, its cross-section is rectangular. The aforementioned wood material has a cut section formed by cutting its corners. A method for forming column and beam members, comprising placing a positioning member for determining the position of the wood material within the formwork within the formwork, and then pouring concrete into the formwork.

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