Structural facing material

Abstract

To provide a structural face material capable of improving ventilation efficiency inside a building.SOLUTION: In a structural face material 1 provided with a substrate 10 and a plurality of protrusions 12 provided on the substrate 10, the plurality of protrusions 12 are each rhombic columnar in shape and arranged in an oblique lattice shape with the longer diagonal line of a rhomboid-shaped tip surface 12a viewed from the side of the protrusion 12 in the thickness direction of the substrate 10 as the vertical direction and the shorter diagonal line as the lateral direction, grooves 14 between adjacent protrusions 12 should be 30 mm or more and 60 mm or less in width and between 8 mm or more and 20 mm or less in depth, and the interval between the protrusions 12 adjacent in the lateral direction is 70 mm or more and 160 mm or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a structural surface material, and more particularly to a structural surface material that can be applied to the walls, roofs, ceilings, etc. of buildings by an exterior construction method. [Background technology]

[0002] For example, a structural surface material is known as a thermal insulation material used in an exterior thermal insulation method for buildings such as houses, in which multiple protrusions are formed on one side of a substrate and grooves between the protrusions function as air passages. Patent Document 1 discloses a composite insulation board as a structural surface material applied to the walls, roofs, ceilings, etc. of buildings, in which phenol foam and polystyrene foam are laminated and multiple protrusions, each of which has a square shape when viewed from the thickness direction, are formed on the surface of the polystyrene foam. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-119923 A Summary of the Invention [Problem to be solved by the invention]

[0004] If the flow rate and volume of air in the grooves between the protrusions in the structural panel can be increased, the ventilation efficiency inside the building can be improved. An object of the present invention is to provide a structural surface material that can improve the ventilation efficiency inside a building. [Means for solving the problem]

[0005] The present invention has the following aspects. [1] A structural surface material for use in buildings, comprising a base material and a plurality of protrusions provided on the base material, each of the plurality of protrusions being rhombic columnar in shape and arranged in a diagonal grid pattern with the longer diagonal of the tip face of the rhombus as viewed from the protrusion side in the thickness direction of the base material being the vertical direction and the shorter diagonal being the horizontal direction, each of the grooves between adjacent protrusions being 30 mm or more and 60 mm or less in width and 8 mm or more and 20 mm or less in depth, and the spacing between adjacent protrusions in the horizontal direction being 70 mm or more and 160 mm or less. [2] A structural surface material as described in [1], wherein the ratio of the length of the longer diagonal of the tip face of the protrusion to the length of the shorter diagonal of the tip face of the protrusion is 1.5 or more and 2.5 or less. [3] The structural surface material according to [1] or [2], wherein the substrate and the plurality of protrusions are made of particle board. [4] A structural surface material as described in [3], in which an insulating board is laminated on the side of the substrate opposite to the side on which the multiple protrusions are provided. [5] A structural surface material as described in [1] or [2], wherein the substrate and the plurality of protrusions are made of polystyrene foam, and a plate-shaped phenolic foam is laminated on the side of the substrate opposite the side on which the plurality of protrusions are provided. Effect of the Invention

[0006] According to the present invention, a structural surface material capable of improving the ventilation efficiency inside a building can be provided. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a front view of the structural panel of the embodiment, seen from the protruding portion side. [Diagram 2] FIG. 2 is a cross-sectional view of the structural panel shown in FIG. 1 along line A-A. [Diagram 3] FIG. 2 is an enlarged view of a number of protrusions of the structural panel of FIG. 1. [Figure 4] FIG. 2 is a cross-sectional view of a structural panel according to another embodiment. [Diagram 5] FIG. 2 is a cross-sectional view of a structural panel according to another embodiment. [Figure 6]1 shows the air flow velocity distribution in the groove in the simulation of Example 1. [Figure 7] 13 is a graph showing the air flow velocity distribution in the groove in the simulation of Example 2. [Figure 8] 13 is a graph showing the air flow velocity distribution in the groove in the simulation of Example 3. [Figure 9] 13 is a graph showing the air flow velocity distribution in the groove in the simulation of Example 4. [Figure 10] 1 shows the pressure distribution in the groove in the simulation of Example 1. [Figure 11] 13 shows the pressure distribution in the groove in the simulation of Example 2. [Figure 12] 13 shows the pressure distribution in the groove in the simulation of Example 3. [Figure 13] 13 shows the pressure distribution in the groove in the simulation of Example 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The structural surface material of the present invention is a structural surface material used in buildings, and can be applied to the walls, roofs, ceilings, etc. of buildings by exterior construction methods. An example of the structural surface material of the present invention is shown below and described with reference to the drawings. Note that the dimensions of the drawings exemplified in the following description are merely examples, and the present invention is not necessarily limited to them, and can be appropriately modified and implemented within the scope of the present invention.

[0009] 1 to 3, the structural surface material 1 of this embodiment includes a substrate 10 and a plurality of protrusions 12 provided on the substrate 10. For convenience, when viewing the structural surface material 1 from the protrusion 12 side in the thickness direction, the horizontal direction (direction from right to left in FIG. 1) is defined as the x-axis direction, the vertical direction (direction toward the top in FIG. 1) is defined as the y-axis direction, and the thickness direction (direction from the back side to the front side of the paper in FIG. 1) is defined as the z-axis direction.

[0010] Each of the multiple protrusions 12 is a diamond-shaped column, and the shape of the tip face 12a when viewed from the protrusion 12 side in the thickness direction (z-axis direction) of the substrate 10 is diamond-shaped. Also, as shown in Figures 1 and 3, in the structural surface material 1, the multiple protrusions 12 are arranged in a diagonal lattice pattern with the longer diagonal line a of the diamond-shaped tip face 12a extending vertically (y-axis direction) and the shorter diagonal line b extending horizontally (x-axis direction).

[0011] Between adjacent protrusions 12 there are grooves 14. When the structural surface material 1 is viewed from the protrusion 12 side in the thickness direction, the multiple protrusions 12 arranged in a diagonal lattice pattern form multiple grooves 14 extending in straight lines inclined diagonally to the right with respect to the vertical direction (y-axis direction) and multiple grooves 14 extending in straight lines inclined diagonally to the left with respect to the vertical direction (y-axis direction) so as to intersect with each other.

[0012] In this example, the substrate 10 and the multiple protrusions 12 are made of particle board, that is, the structural surface material 1 is a wood surface material. The shape of the structural surface material 1 as viewed from the protrusion 12 side in the thickness direction may be set appropriately depending on the application, and is rectangular in this example. The dimensions of the structural surface material 1 are not particularly limited and can be set appropriately depending on the application, for example, from 900 mm to 3500 mm in length and from 300 mm to 1500 mm in width.

[0013] The thickness of the substrate 10, that is, the thickness of the portion of the substrate 10 where the protrusions 12 are not formed (the portion of the grooves 14) is preferably 8 mm or more and 24 mm or less, and the closer to the upper limit, the higher the wall ratio becomes. The thickness of the substrate 10 is defined as the average value of thicknesses measured at any ten points on the portion of the substrate 10 on which the protrusions 12 are not formed.

[0014] In this example, the cross-sectional shape of groove 14 when cut in a direction perpendicular to its length direction is rectangular. Note that the cross-sectional shape of groove 14 is not limited to a rectangle, and may be, for example, a rectangular shape with both corners on the bottom side formed in an arc shape, or a trapezoid shape with the width on the bottom side narrower than the width on the opening side.

[0015] The width of the groove 14 is 30 mm to 60 mm, preferably 35 mm to 45 mm. If the width of the groove 14 is within this range, the flow velocity and volume of air passing through the groove 14 from one end to the other in the vertical direction (y-axis direction) of the structural surface material 1 will increase, and the ventilation efficiency of a building to which the structural surface material 1 is applied will be improved. The width of groove 14 is defined as the average value of the distance between the open ends of groove 14 (opening width of groove 14) measured at any ten points in a cross section perpendicular to the longitudinal direction of groove 14.

[0016] The depth of the groove 14 is 8 mm or more and 20 mm or less, and preferably 10 mm or more and 15 mm or less. If the depth of the groove 14 is within this range, the flow velocity and amount of air flowing through the groove 14 from one end to the other end in the vertical direction (y-axis direction) of the structural surface material 1 will increase, and the ventilation efficiency of a building to which the structural surface material 1 is applied will be improved. The depth of groove 14 is defined as the average value of the distance in the thickness direction (z-axis direction) between the open end and the deepest part of groove 14 in a cross section perpendicular to the longitudinal direction of groove 14, measured at any ten points.

[0017] The interval P1 (FIG. 3) between adjacent protrusions 12 in the horizontal direction (x-axis direction) is 160 mm or less. If the interval P1 between the protrusions 12 is equal to or less than the upper limit, when the structural surface material 1 is installed on the wall, roof, ceiling, etc. of a building, nails can be driven at equal intervals (for example, 150 mm intervals) into the peripheral portion of the structural surface material 1 where the protrusions 12 are located, while avoiding the grooves 14, to firmly fix the structural surface material 1. The interval P1 between the protrusions 12 can be set according to the intervals at which nails are driven when the structural surface material 1 is installed, and is preferably 70 mm or more and 160 mm or less, and more preferably 140 mm or more and 151.5 mm or less. The distance P1 between the protrusions 12 is the average value of the distance between the intersections of diagonals a and b of the diamond-shaped tip surfaces 12a of adjacent protrusions 12 in the horizontal direction (x-axis direction) measured at any ten points.

[0018] The distance P2 (FIG. 3) between the mutually facing tips of adjacent protrusions 12 in the vertical direction (y-axis direction) is preferably 150 mm or less. If the distance P2 is equal to or less than the above upper limit, when the structural surface material 1 is installed on the wall, roof, ceiling, etc. of a building, it becomes easy to drive nails at equal intervals (for example, 150 mm intervals) into the portion of the peripheral portion of the structural surface material 1 where the protrusions 12 are located while avoiding the grooves 14, and to firmly fix the structural surface material 1. The distance P2 can be set according to the intervals at which nails are driven when installing the structural surface material 1, and is preferably 60 mm or more and 140 mm or less, and more preferably 85 mm or more and 95 mm or less. The interval P2 is defined as the average value of the distance between the tips of the protrusions 12 that face each other and are adjacent to each other in the vertical direction (y-axis direction) measured at any ten points.

[0019] The ratio (a / b) of the length of the longer diagonal a to the length of the shorter diagonal b of the diamond-shaped tip surface 12a of the protrusion 12 is preferably 1.5 to 2.5, more preferably 1.8 to 2.2. If the ratio (a / b) is within the above range, the flow velocity and amount of air passing through the grooves 14 from one end to the other in the vertical direction (y-axis direction) of the structural surface material 1 will increase, and the ventilation efficiency of a building to which the structural surface material 1 is applied will be improved.

[0020] The length of the longer diagonal a of the diamond-shaped tip surface 12a of the protrusion 12 is preferably 80 mm or more and 220 mm or less, and more preferably 210 mm or more and 216 mm or less. The length of the shorter diagonal b of the diamond-shaped tip surface 12a of the protrusion 12 is preferably 40 mm or more and 110 mm or less, and more preferably 103 mm or more and 110 mm or less.

[0021] It is preferable that the dimensions of the diamond shape of the tip surface 12a of each protrusion 12 in the structural surface material 1 are all the same. This ensures uniform vertical ventilation throughout the entire structural surface material 1, thereby improving the ventilation efficiency of a building to which the structural surface material 1 is applied. Note that, as long as the effects of the present invention are not impaired, the multiple protrusions 12 may include those with diamond shape tip surfaces 12a that are different in dimensions.

[0022] When air is introduced into each groove 14 from one end of the structural surface material 1 in the vertical direction and a pressure of 0.021 Pa is applied to the air inlet, the maximum air flow rate is 0.8 × 10 -2 m / s or more, and the maximum flow rate of air is preferably 1.3 L / min or more. The maximum flow velocity and maximum flow rate of air flowing through groove 14 can be adjusted by adjusting the width and depth of groove 14, the intervals P1 and P2 between protrusions 12, the ratio (a / b), and the like.

[0023] The manufacturing method of the structural surface material 1 is not particularly limited, and an example of such a method is to manufacture a structural surface material 1 having a plurality of protrusions 12 on a substrate 10 by forming each groove 14 by cutting one side of a particle board.

[0024] The structural surface material 1 can be applied to the walls, roofs, ceilings, etc. of buildings by an exterior construction method, for example, with an insulating board attached to the side opposite to the side where the protrusion 12 of the substrate 10 is provided at the construction site, as described later. Specifically, for example, when applied to the wall of a building, with an insulating board attached to the side opposite to the side where the protrusion 12 of the substrate 10 of the structural surface material 1 is provided, the vertical direction of the structural surface material 1 is set as the up-down direction, the tip surface 12a of the protrusion 12 is abutted against a pillar or a partition, and nails are driven vertically and horizontally at equal intervals at the nail driving positions 40 shown in FIG. 1 to fix it to the pillar or partition. When multiple structural surface materials 1 are arranged and erected, it is preferable to perform a waterproofing treatment such as sealing with waterproof tape to prevent water from entering the joints between the structural surface materials 1 to which the insulating boards are attached. In such an embodiment, each groove 14 of the structural surface material 1 functions as an air passage, so that air can be moved from under the floor through the walls to the entire building. This makes it easier to maintain a comfortable humidity and temperature inside the building, and in wooden buildings, exposing the pillars and other structural members to air makes it easier to keep the wood dry, which extends the life of the building structure. The structural surface material 1 may also be used for the ceilings, floors, etc. of buildings.

[0025] As described above, in the structural facing material 1, a plurality of diamond-shaped columnar protrusions 12 are provided on the substrate 10 in a diagonal lattice pattern, and the width and depth of the grooves 14 and the interval P1 between the protrusions 12 are controlled within a specific range. When the structural facing material 1 is viewed from the side of the protrusions 12 in the thickness direction of the substrate 10, the grooves 14 extending linearly and inclined to the right intersect with the grooves 14 extending linearly and inclined to the left. In the structural facing material 1 in such a mode, although the reason is not clear, when air is circulated in the longitudinal direction of the structural facing material 1 (the direction in which the longer diagonal line a of the diamond-shaped tip surface 12a of each protrusion 12 extends), the air flow velocity and flow rate are improved particularly at the portion where the two grooves 14 intersect. Therefore, by using the structural facing material 1, the ventilation efficiency inside the building is improved, it becomes easier to comfortably maintain the humidity and temperature inside the building, and furthermore, the service life of the building structure can be extended.

[0026] Note that the structural facing material of the present invention is not limited to the above-described structural facing material 1. For example, the structural facing material of the present invention may be the structural facing material 2 illustrated in FIG. 4. The same parts as those in FIG. 2 in FIG. 4 are denoted by the same reference numerals and the description thereof is omitted. The structural facing material 2 has the same mode as the structural facing material 1 except that a heat insulating board 20 is laminated on the side opposite to the side where the plurality of protrusions 12 of the substrate 10 are provided.

[0027] The heat insulating board 20 is not particularly limited, and a known heat insulating board can be used. For example, plate-shaped polystyrene foam and phenolic foam can be exemplified. Among them, as the heat insulating board 20, plate-shaped phenolic foam is preferable from the viewpoint of excellent heat insulating performance. The heat insulating board 20 may be a single-layer heat insulating board or a multi-layer heat insulating board.

[0028] The thickness of the heat insulating board 20 is preferably 10 mm or more and 90 mm or less, and more preferably 30 mm or more and 90 mm or less. The larger the thickness of the heat insulating board 20 within the above range, the easier it is to obtain excellent heat insulating performance. Note that the thickness of the heat insulating board 20 is the average value of the thicknesses measured at any 10 locations in the heat insulating board 20.

[0029] The method for laminating the insulation board 20 on the side opposite to the side of the substrate 10 on which the multiple protrusions 12 are provided is not particularly limited, and an example of the method is a method of bonding the insulation board 20 to the substrate 10 using an adhesive. The adhesive for bonding the insulation board 20 is not particularly limited, and examples of the adhesive include known rubber-based adhesives and vinyl acetate-based adhesives.

[0030] The heat insulating board 20 may be provided with a sheet-like skin material on one or both sides. Examples of the skin material include aluminum foil, nonwoven fabric, etc. When the surface of the heat insulating board 20 opposite the substrate 10 is the outer surface side of the exterior cladding method, a waterproof skin material may be attached to that surface.

[0031] The method of providing a skin on the surface of the insulation board 20 is not particularly limited, and an example of the method is a method of attaching the skin with an adhesive. The adhesive for attaching the skin is not particularly limited, and examples of the method include known rubber-based adhesives and vinyl acetate-based adhesives. When the insulation board 20 is made of phenol foam and skin is provided on both sides of the board, a method may be used in which a pair of skins are arranged parallel to each other with their faces facing each other, and phenol is injected between the pair of skins from an extrusion die and heated to foam.

[0032] A waterproof layer may be further provided on the skin material provided on the surface that is the outer surface of the exterior cladding construction method of the insulation board 20. Examples of the waterproof layer include nonwoven fabric, aluminum foil, synthetic resin sheets such as polypropylene, polyethylene, polyvinyl chloride, and EVA (ethylene-vinyl acetate copolymer), resin plates, and metal plates such as stainless steel. The waterproof layer may also be a waterproof coating film such as a urethane-based resin coating film.

[0033] When applying to the walls, roofs, ceilings, etc. of buildings, the structural panel 1 and the insulating board 20 may be manufactured separately in advance and transported to the construction site, where the insulating board 20 may be attached to the substrate 10 of the structural panel 1 to form the structural panel 2, or the structural panel 2 may be manufactured in advance and transported to the construction site for use.

[0034] Like structural panel 1, structural panel 2 improves the airflow rate and volume when air is circulated vertically through structural panel 1, particularly at the intersection of two grooves 14, improving the ventilation efficiency inside the building. Furthermore, structural panel materials whose base plate and multiple protrusions are made of particle board, such as structural panel materials 1 and 2, have a higher wall factor than structural panel materials made of foamed resin, and are therefore advantageous in that they improve the earthquake resistance of the building.

[0035] The structural panel of the present invention may be the structural panel 3 exemplified in Fig. 5. In Fig. 5, the same parts as in Fig. 2 are given the same reference numerals and the explanation thereof will be omitted. The structural surface material 3 comprises a substrate 10A, a polystyrene foam 30 having a plurality of protrusions 12A, and a plate-shaped phenol foam 32 laminated on the side of the substrate 10A opposite to the side on which the plurality of protrusions 12A are provided.

[0036] The substrate 10A and the multiple protrusions 12A in the structural panel 3 have the same configuration as the substrate 10 and the multiple protrusions 12 in the structural panel 1, except that they are made of polystyrene foam, and the preferred configurations are also the same. The polystyrene foam 30 can be obtained by forming it into a plate shape by foam molding such as a bead method, etc. Since the polystyrene foam 30 has excellent moldability, it is easy to form it into a shape in which a plurality of protrusions 12A are provided on the substrate 10A.

[0037] The phenol foam 32 is obtained, for example, by extrusion molding. The phenol foam 32 has excellent heat insulating properties. Therefore, by forming the structural face material 3 as a laminate of the polystyrene foam 30 and the phenol foam 32, it is easy to obtain sufficient heat insulating properties even with a thinner structural face material 3 compared to a structural face material composed only of polystyrene foam.

[0038] A sheet-like skin material may be provided on one or both sides of the phenolic foam 32. Examples of the skin material include the same materials as those exemplified for the structural surface material 2. The method for providing a skin material on the phenolic foam 32 is not particularly limited, and examples thereof include the same method as that for providing a skin material on the insulation board 20 of the structural surface material 2. A waterproof layer may be further provided on the skin material provided on the surface that will be the outer surface of the exterior cladding method in the phenol foam 32. As the waterproof layer, for example, the same ones as those exemplified for the structural surface material 2 can be exemplified.

[0039] Like the structural surface material 1, the structural surface material 3 also improves the air flow rate and volume when air is circulated vertically through the structural surface material 1, particularly at the intersection of the two grooves 14, improving the ventilation efficiency inside the building. Furthermore, the use of the structural surface material 3 is advantageous not only in terms of thermal insulation performance, but also in terms of sound insulation.

[0040] As long as the effect of the present invention is not impaired, the shape of the tip surface of the protrusion when viewed from the protrusion side in the thickness direction of the substrate may be such that one or more of the four corners of the rhombus are rounded. In addition, within the scope of the invention, the components in the above-described embodiments may be replaced with well-known components, and the above-described modified examples may be combined as appropriate. EXAMPLES

[0041] The present invention will be specifically described below with reference to examples, but the present invention is not limited to the following description.

[0042] [Example 1] A simulation was performed using Ansys Fluent for a structural panel having the same configuration as the structural panel 1 illustrated in Figures 1 to 3, and air was made to flow into each groove from the bottom surface in the vertical direction (y-axis direction) of the structural panel, and the maximum flow velocity and maximum flow rate of the air were obtained when a pressure of 0.021 Pa was applied to the air inlet. In addition, the pressure applied to the inlet was obtained when the air flow velocity at the air inlet of the groove was set to 0.8 cm / s. In the simulation, the other end (top surface) of the structural panel in the vertical direction (y-axis direction) was assumed to be subjected to atmospheric pressure as the outflow area, and the remaining surfaces (both sides in the x-axis direction) were assumed to be all wall surfaces with no friction. The dimensions of the structural panel were 3033 mm vertical, 909 mm horizontal, and 21 mm thick for the base material, with the width of the groove between adjacent protrusions on the structural panel being 30 mm, the depth being 12 mm, the spacing P1 between the protrusions being 75.75 mm, the spacing P2 between the protrusions being 67.08 mm, the length of the shorter diagonal b of the diamond-shaped tip surface of the protrusion being 42.21 mm, the length of the longer diagonal a being 84.42 mm, and the ratio (a / b) being 2.0.

[0043] [Examples 2 and 3] The maximum air flow velocity and maximum air flow rate were determined in the same manner as in Example 1, except that the dimensions of the protrusions and grooves were changed as shown in Table 1.

[0044] [Example 4] The maximum air flow velocity and maximum flow rate were determined in the same manner as in Example 1, except that each protrusion was made into a square columnar shape and the dimensions of the protrusions and grooves were changed as shown in Table 1.

[0045] The conditions and simulation results for each example are shown in Table 1. The "increase rate of maximum flow velocity" in Table 1 is the increase rate (percentage) of the maximum flow velocity for each example based on the maximum flow velocity of Example 4. The "increase rate of maximum flow rate" in Table 1 is the increase rate (percentage) of the maximum flow rate for each example based on the maximum flow rate of Example 4. The "increase rate of pressure" in Table 1 is the increase rate (percentage) of the pressure at the inlet of each example based on the pressure at the inlet of Example 4. The air flow velocity distributions in the grooves obtained in the simulations of Examples 1 to 4 are shown in Figures 6 to 9, respectively. The pressure distributions in the grooves obtained in the simulations of Examples 1 to 4 are shown in Figures 10 to 13, respectively.

[0046] [Table 1] *There is a possibility of turbulence

[0047] As shown in Table 1, in Examples 1 to 3 in which a plurality of diamond-shaped columnar protrusions were provided and the width, depth, and interval P1 of the grooves were controlled within specific ranges, the maximum flow velocity and maximum flow rate of air flowing through the grooves 14 were increased compared to Example 4 in which a plurality of columnar protrusions with square tip faces were provided. As shown in Figures 6 to 9, in Examples 1 to 3, the flow velocity and flow rate were particularly increased at the intersection of two grooves compared to Example 4. Also, as shown in Table 1 and Figures 10 to 13, in Examples 1 to 3, the pressure at the inlet of the grooves was lower than in Example 4, and it was found that there was less resistance when air was flowing at the same flow velocity. [Explanation of symbols]

[0048] 1 to 3: structural surface material, 10: base plate, 12: protrusion, 12a: tip surface, 14: groove, 20: insulation board, 30: polystyrene foam, 32: phenolic foam.

Claims

1. A structural surface material used in buildings, A substrate and a plurality of protrusions provided on the substrate, the plurality of protrusions are each rhombic columnar in shape, and are arranged in a diagonal lattice pattern with a longer diagonal line of a tip face of the rhombus as viewed from the protrusion side in the thickness direction of the substrate as a vertical direction and a shorter diagonal line of the tip face as a horizontal direction; the ratio of the length of the longer diagonal line to the length of the shorter diagonal line of the diamond-shaped tip surface of the protrusion is 1.8 or more and 2.5 or less, The groove between adjacent protrusions has a width of 35 mm or more and 60 mm or less and a depth of 8 mm or more and 20 mm or less, The distance between the intersections of the diagonals of the diamond-shaped tip surfaces of the protrusions adjacent in the horizontal direction is 140 mm or more and 160 mm or less, The distance between the tips of the vertically adjacent protrusions facing each other is 85 mm or more and 140 mm or less, A structural surface material, wherein the grooves at the top and bottom ends of the substrate are aligned.

2. 2. The structural panel of claim 1, wherein the substrate and the plurality of protrusions are made of particle board.

3. The structural surface material according to claim 2 , wherein an insulating board is laminated on the side of the substrate opposite to the side on which the plurality of protrusions are provided.

4. 2. The structural surface material according to claim 1, wherein the substrate and the plurality of protrusions are made of polystyrene foam, and a plate-shaped phenol foam is laminated on the side of the substrate opposite the side on which the plurality of protrusions are provided.

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