Refractory structure

Abstract

To improve workability when a burning marginal layer is formed.SOLUTION: A fireproof structure of a building has a building structure 10 and a burning marginal material 5 forming a burning marginal layer. A cutout part 11 is provided at a projected corner part of the building structure 10. The burning marginal material 5 includes at least a corner burning marginal material 51 covering the projected corner part. At least a portion of the corner burning marginal material 51 is disposed in the cutout part 11. The burning marginal material 5 includes flat surface burning marginal materials 52, 53 for covering a portion excluding the projected corner part of the building structure 10. The flat surface burning marginal materials 52, 53 are disposed between two corner burning marginal materials 51. Corner side fitting parts 51e, 51f are provided on the corner burning marginal material 51, and flat surface side fitting parts 52a, 53a, which can be fitted to the corner side fitting parts 51e, 51f, are provided on the flat surface burning marginal materials 52, 53.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to the fire-resistant structure of a building.

Background Art

[0002] Conventionally, there is known a wooden building member having a load-bearing part made of wood, a char layer (wood serving as the char layer) covering the load-bearing part, a fire-stopping layer (gypsum board) provided between the load-bearing part and the char layer, a heat-expandable material provided between the fire-stopping layer and the char layer, and a plurality of spacers disposed in a portion where the heat-expandable material is provided (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, the wood serving as the char layer is a plate material having a rectangular shape, and no member or the like for positioning the wood is provided. The wood serving as the char layer is only fixed to the fire-stopping layer via a rectangular bar-shaped spacer. Therefore, the work of fixing the wood serving as the char layer to a predetermined position, that is, the work of forming the char layer is difficult.

[0005] The present invention has been made in view of the above circumstances, and the problem thereof is to improve the workability when forming the char layer.

Means for Solving the Problems

[0006] The invention according to claim 1 is, for example Figures 9 and 10 As shown in, a fire-resistant structure of a building, A building structure 10, It comprises a combustible material 5 that forms a combustible layer, A notch 11 is provided at the outer corner of the building structure 10. The burnable material 5 includes at least corner burnable materials 51, 54, and 56 that cover the outer corner portion. At least a portion of the corner burn-off material 51, 54, 56 is placed within the notch 11. Occasionally, The building structure 10 comprises wooden structural members (architectural panels 21, column members 2, beam members, adjustment members 22, etc.) that constitute the frame of the building, a first fire-resistant covering material (fire-resistant covering material 4) that covers the frame, and a second fire-resistant covering material 6 that is in contact with the surface of the first fire-resistant covering material. The corner burn-off material 56 comprises a first covering portion 56a and a second covering portion 56b perpendicular to the first covering portion 56a. The end of the first covering portion 56a is in contact with the surface of the first fire-resistant covering material parallel to a predetermined direction, and the end face of the said end faces the end face of the second fire-resistant covering material 6 that is in contact with the said surface. The end of the second covering portion 56b is in contact with the surface of the first fire-resistant covering material perpendicular to the predetermined direction, and the end face of the end is opposite to the end face of the second fire-resistant covering material 6 that is in contact with the surface. It is characterized by being present.

[0007] According to the invention described in claim 1, the burnable material 5 includes corner burnable materials 51, 54, and 56, at least a portion of which are placed in the notches 11 provided at the outer corners of the building structure 10. Therefore, the corner portion of the burnable layer can be positioned by the notches 11 provided at the outer corners of the building structure 10 and the corner burnable materials 51, 54, and 56. Consequently, the positioning of the burnable material 5 is easy, which improves the workability when forming the burnable layer. Furthermore, by simply bringing both ends of the corner burn-off material 54 into contact with the surface of the first fire-resistant coating material (fire-resistant coating material 4), which has a second fire-resistant coating material 6 on its surface, at least a portion of the corner burn-off material 54 can be positioned within the notch 11 provided at the outer corner of the building structure 10. In other words, since the positioning of the burn-off material 5 is easy, the workability when forming the burn-off layer can be improved. Furthermore, the main body of the building structure 10 (the structural frame and the first fire-resistant covering material (fire-resistant covering material 4)) can be covered by the corner burn-off material 54 and the second fire-resistant covering material 6. Therefore, since it is only necessary to place the burn-off material 5 (corner burn-off material 54) in the parts not covered by the second fire-resistant covering material 6 (outside corners), the number of parts can be reduced and the workability when forming the burn-off layer can be improved.

[0016] Claim 2 The invention described above is, for example, Figures 9 and 10 As shown, the fire-resistant structure according to claim 1, The dimensions of the burnable material 5 are set such that a gap is formed between the burnable layer formed by the burnable material 5 and the building structure 10.

[0017] Claim 2According to the invention described in , just by arranging the combustion margin material 5, a gap is provided between the combustion margin layer formed by the combustion margin material 5 and the building structure 10. Therefore, it becomes possible to form the combustion margin layer without considering the error of the building structure 10. That is, the error of the building structure 10 (for example, the construction error of the fireproof coating materials 4, 6) can be absorbed by the gap provided between the combustion margin layer formed by the combustion margin material 5 and the building structure 10. Thus, it becomes possible to form the combustion margin layer without considering the error of the building structure 10, and the workability when forming the combustion margin layer can be improved.

Effect of the Invention

[0018] According to the present invention, the workability when forming the combustion margin layer can be improved.

Brief Description of the Drawings

[0019] [Figure 1] First Embodiment: A perspective view showing an example of a column. [Figure 2] First Embodiment: (a) An exploded cross-sectional view showing an example of a building structure, (b) An exploded cross-sectional view showing an example of a column. [Figure 3] First Embodiment: A cross-sectional view showing an example of a column. [Figure 4] First Embodiment: A diagram for explaining an example of the dimensions and shape of the combustion margin material. [Figure 5] First Modified Example: An exploded cross-sectional view showing an example of a column. [Figure 6] First Modified Example: A cross-sectional view showing an example of a column. [Figure 7] Second Embodiment: (a) An exploded cross-sectional view showing an example of a building structure, (b) An exploded cross-sectional view showing an example of a column. [Figure 8] Second Embodiment: A cross-sectional view showing an example of a column. [Figure 9] Third Embodiment: (a) An exploded cross-sectional view showing an example of a building structure, (b) An exploded cross-sectional view showing an example of a column. [Figure 10]Embodiment 3: A cross-sectional view showing an example of a column. [Figure 11] A diagram for explaining an example of an external corner portion of a general building structure. [Figure 12] A diagram showing a modified example of a building structure member, and an exploded cross-sectional view showing an example of a building structure. [Figure 13] A diagram showing a modified example of a building structure member, and a cross-sectional view showing an example of a wall. [Figure 14] A diagram showing a modified example of a building structure, (a) an exploded cross-sectional view showing an example of a building structure, and (b) an exploded cross-sectional view showing an example of a column.

Mode for Carrying Out the Invention

[0020] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, although various technically preferable limitations are imposed on the embodiments described below for carrying out the present invention, the technical scope of the present invention is not limited to the following embodiments (and modified examples) and illustrated examples. In addition, the directions (front-back direction, left-right direction, up-down direction) in the following embodiments (and modified examples) and illustrated examples are merely set for convenience of explanation.

[0021] 《First Embodiment》 In FIGS. 1 to 3, reference numeral 1 indicates a column of a building. The building is constructed by a panel method in which components of the building such as walls, floors, and roofs are pre-panelized in a factory and these panels are assembled at the construction site, but it is not limited thereto and may be constructed by a conventional frame method, wall method, two-by-four method, etc. Also, the panel is a building panel in which vertical and horizontal frame members A are assembled in a rectangular shape to form a rectangular frame, auxiliary cross members B are assembled vertically and horizontally inside this rectangular frame to form a frame body, and a facing material C is attached to both sides or one side of this frame body, having an internal hollow structure. Usually, a heat insulating material such as glass wool or rock wool is filled in the internal hollow portion (the back side of the facing material C).

[0022] In other words, in this embodiment, the building's frame is composed of building panels 21 such as building wall panels, building floor panels, and building roof panels, as well as columns 2, beams, and adjustment members 22. These structural members (building panels 21, columns 2, beams, and adjustment members 22) that make up the frame are covered with fire-resistant covering material 4 to form the walls, floors, and ceilings of the building. The fire-resistant coating material 4 in this embodiment is reinforced gypsum board, but is not limited to this, and may be other types of fire-resistant coating materials. Furthermore, in this embodiment, the building structure is covered with a single fire-resistant covering material 4, but it is not limited to this, and may be covered with multiple layers of fire-resistant covering material 4.

[0023] The column 1 of this embodiment is composed of a building structure 10 having wooden structural members (column members 2, etc.) that constitute the frame of the building and a fire-resistant covering material 4 that covers the frame, and wooden burn-through material 5 that forms a burn-through layer. The thickness dimension of the burnable material 5 (burnable layer) is set to the dimension determined using a known burnable design.

[0024] Column 2 is erected on the upper surface of the substructure (not shown) and is a solid piece of wood with a solid core. In this embodiment, it is made of solid wood (square timber: sawn timber), for example, but is not limited to this, and may also be made of LVL (Laminated Veneer Lumber), CLT (Cross Laminated Timber), glued laminated timber, or other materials. As shown in Figure 2(a), column member 2 has a rectangular shape in which the four corners are cut out in an L-shape in a plan view (cross-sectional view). Of course, column member 2 (the column member with the four corners cut out) has sufficient structural strength.

[0025] In this embodiment, as shown in Figure 2(b), even when the column member 2 is covered with the fire-resistant covering material 4, the four corners of the rectangle are cut out in an L-shape in a plan view (cross-sectional view). That is, the four protruding corners of the building structure 10, which consists of the column member 2 and the fire-resistant covering material 4, are provided with L-shaped cutouts 11 along the vertical direction in a plan view.

[0026] The burn-through material 5 includes at least three types: corner burn-through material 51 that covers the outer corners of the building structure 10, and first-plane burn-through material 52 and second-plane burn-through material 53 that cover parts of the building structure 10 other than the outer corners. The corner burn-off material 51 has a shape in which one corner of a square is cut out in a square shape in a plan view (cross-sectional view). That is, the corner burn-off material 51 is an L-shaped member in a plan view having an inner corner formed by a first cut surface 51a parallel to the left-right direction and a second cut surface 51b parallel to the front-back direction.

[0027] As shown in Figure 4, the width dimension (length in the left-right direction) of the first notch surface 51a and the width dimension (length in the front-back direction) of the second notch surface 51b are set such that both the first notch surface 51a and the second notch surface 51b can be brought into contact with the building structure 10 at the same time, and in that contact state, both the side surface 51c perpendicular to the first notch surface 51a and the side surface 51d perpendicular to the second notch surface 51b of the corner burn-off material 51 can be brought into contact with the building structure 10 at the same time. Note that Figure 4 is a diagram used to explain the dimensions of the notched surfaces 51a and 51b, and the thickness dimensions of the planar burn-off materials 52 and 53 (described later). The positional relationship between the building structure 10 and the burn-off materials 51, 52, and 53 shown in Figure 4 is different from the actual positional relationship (the positional relationship when they constitute column 1). The actual positional relationship is as shown in Figure 3, where the building structure 10 and the burn-off materials 51, 52, and 53 are not in contact but are separated.

[0028] Of the planar burn-off materials 52 and 53, the first planar burn-off material 52, which covers the surfaces (front and rear) parallel to the left-right direction in the building structure 10, is a rectangular plate-shaped member, and its width dimension (length in the left-right direction) L21 is set to be longer than the width dimension L11 of the front-rear ends (front and rear ends) in the front-rear direction of the building structure 10 (L11 <L21)。 As a result, by connecting the left and right corner burn-off materials 51 with the first plane burn-off material 52, the surfaces of the left corner burn-off material 51 facing the building structure 10 that are parallel in the front-to-back direction (the side surface 51c perpendicular to the first cut-out surface 51a, and the second cut-out surface 51b) are separated from the building structure 10, and the surfaces of the right corner burn-off material 51 facing the building structure 10 that are parallel in the front-to-back direction (the side surface 51c perpendicular to the first cut-out surface 51a, and the second cut-out surface 51b) are separated from the building structure 10.

[0029] Furthermore, of the two planar burn-off materials 52 and 53, the second planar burn-off material 53, which covers the surfaces (left and right sides) parallel to the front-to-back direction in the building structure 10, is a rectangular plate-shaped member, and its width dimension (length in the front-to-back direction) L22 is set to be longer than the width dimension L12 of the left and right ends (left and right ends) of the building structure 10 (L12 <L22)。 As a result, by connecting the front and rear corner burn-off materials 51 with the second plane burn-off material 53, the surfaces of the front corner burn-off material 51 that face the building structure 10 and are parallel to the left-right direction (the side surface 51d perpendicular to the second notch surface 51b, and the first notch surface 51a) are separated from the building structure 10, and the surfaces of the rear corner burn-off material 51 that face the building structure 10 and are parallel to the left-right direction (the side surface 51d perpendicular to the second notch surface 51b, and the first notch surface 51a) are separated from the building structure 10.

[0030] Therefore, by connecting the four corner burn-off materials 51 with the two first-plane burn-off materials 52 and the two second-plane burn-off materials 53, as shown in Figure 3, the surfaces of each corner burn-off material 51 facing the building structure 10, both parallel to the front-to-back direction and parallel to the left-to-right direction, are separated from the building structure 10.

[0031] Furthermore, as shown in Figure 4, the thickness dimension (length in the front-to-back direction) of the first flat surface burn-through material 52 is set to be less than or equal to the difference between the width dimension (length in the front-to-back direction) L31 of the side surface 51c of the corner burn-through material 51 that is perpendicular to the first missing surface 51a, and the thickness dimension (length in the front-to-back direction) L4 of the fire-resistant coating material 4. Furthermore, the thickness dimension (length in the left-right direction) of the second flat surface burn-through material 53 is set to be less than or equal to the difference between the width dimension (length in the left-right direction) L32 of the side surface 51d of the corner burn-through material 51 that is perpendicular to the second notch surface 51b, and the thickness dimension (length in the left-right direction) L4 of the fire-resistant coating material 4.

[0032] Therefore, by connecting the four corner burn-off materials 51 with two first-plane burn-off materials 52 and two second-plane burn-off materials 53, the surfaces of each plane burn-off material 52 and the surfaces of the corner burn-off materials 51 that are parallel in the left-right direction are flush, and the surfaces of the second-plane burn-off materials 53 and the surfaces of the corner burn-off materials 51 that are parallel in the front-back direction are flush, as shown in Figure 3, the surfaces of each plane burn-off material 52 and 53 that face the building structure 10 are separated from the building structure 10.

[0033] Thus, in this embodiment, the dimensions of the burnable material 5 are set such that a gap is formed between the burnable layer formed by assembling the burnable material 5 and the building structure 10. Therefore, by simply assembling the burn-through materials 51, 52, and 53 around the building structure 10, a burn-through layer with gaps between it and the building structure 10 can be formed. These gaps can absorb errors in the building structure 10 (for example, errors in the construction of the fire-resistant coating material 4), so there is no need to consider these errors. Consequently, there is no need to measure the dimensions of the building structure 10 after the column members 2 (structural members) have been covered with the fire-resistant coating material 4 to construct the building structure 10, making it easy to form a burn-through layer around the building structure 10.

[0034] Furthermore, in this embodiment, the dimensions of the burnable material 5 are set such that, when the burnable material 5 is assembled to form a burnable layer, a portion of the corner burnable material 51 (the notched surfaces 51a, 51b and their surrounding portions) is positioned within the notch 11 of the building structure 10. Therefore, the position of the corner burn-off material 51 relative to the building structure 10 does not shift significantly, making it easy to assemble the burn-off material 5 and to fix the assembled burn-off material 5 in place. The means of joining the burnable materials 5 together may be fasteners (such as screws), adhesives, or a combination of both. Furthermore, when fixing the burnable material 5 to the building structure 10, the means of fixing may be fasteners (screws, etc.), adhesive, or a combination of both.

[0035] 《Method of constructing pillars》 Next, an example of a method for constructing column 1 in the first embodiment will be described. First, the column material 2 (a column material with notches cut into all four corners), the fire-resistant covering material 4, and the charring material 5 are transported from the factory to the construction site. Next, column members 2 are erected on the upper surface of the lower structural part (not shown), and the column members 2 are covered with fire-resistant covering material 4 to form the building structure 10.

[0036] Next, a portion of the corner burn-off material 51 (the notched surfaces 51a, 51b and their surrounding areas) is placed within the notch 11 of the building structure 10. This allows for the approximate positioning of the four corner burn-off materials 51 in the front, back, left, and right directions, that is, the approximate positioning of the four corner sections in the burn-off layer.

[0037] Next, the two corner burn-off materials 51, which are aligned horizontally, are connected by the first flat burn-off material 52. At this time, the first flat burn-off material 52 and the corner burn-off material 51 are joined so that the surface of the first flat burn-off material 52 and the surface of the corner burn-off material 51 that is parallel to the horizontal direction are flush. Furthermore, two corner burn-off materials 51, which are aligned in the front-to-back direction, are connected by a second plane burn-off material 53. When joining the second plane burn-off material 53 and the corner burn-off material 51, the surface of the second plane burn-off material 53 and the surface of the corner burn-off material 51 that is parallel in the front-to-back direction are flush. This makes it possible to form a burnable layer around the building structure 10, with a gap between it and the building structure 10. Finally, the surface of the burnable material 5 (the side opposite to the building structure 10) is covered with a decorative material or the like.

[0038] 《First variation》 As shown in Figures 5 and 6, the corner burn-off material 51 and the flat burn-off materials 52 and 53 may be provided with parts (corner-side fitting parts 51e, 51f and flat-side fitting parts 52a, 53a) to facilitate the positioning of the flat burn-off materials 52 and 53 relative to the corner burn-off material 51. In this modified example, the corner burn-off material 51 has a shape in which, in plan view (cross-sectional view), the corner portion of the corner burn-off material 51 of the first embodiment is notched in a rectangular shape in plan view, with the corner portion formed by the side surface 51c perpendicular to the first notch surface 51a and the surface parallel to the left-right direction, and the corner portion formed by the side surface 51d perpendicular to the second notch surface 51b and the surface parallel to the front-rear direction. That is, of the side surfaces of the corner burn-off material 51, the side surface 51c perpendicular to the first notch surface 51a has a notch (first corner side fitting portion 51e) provided along the vertical direction, and the side surface 51d perpendicular to the second notch surface 51b has a notch (second corner side fitting portion 51f) provided along the vertical direction.

[0039] Furthermore, the first flat surface burn-off material 52 of this modified example has a shape in which protrusions (first flat surface fitting portion 52a) that can be fitted into the first corner side fitting portion 51e of the corner burn-off material 51 are provided at both ends (left end and right end) of the first flat surface burn-off material 52 of the first embodiment. Furthermore, the second flat surface burn-off material 53 in this modified example has a shape in which protrusions (second flat surface fitting portion 53a) that can be fitted into the second corner side fitting portion 51f of the corner burn-off material 51 are provided at both ends (front end and rear end) of the second flat surface burn-off material 53 of the first embodiment.

[0040] Therefore, in this modified example, the positioning of the first planar burn-off material 52 relative to the corner burn-off material 51 can be achieved simply by fitting the first planar side fitting portion 52a of the first planar burn-off material 52 into the first corner side fitting portion 51e of the corner burn-off material 51. In other words, by simply fitting the first planar side fitting portion 52a of the first planar burn-off material 52 into the first corner side fitting portion 51e of the corner burn-off material 51, the surface of the first planar burn-off material 52 (the surface opposite to the building structure 10) and the surfaces of the left and right corner burn-off materials 51 (the surfaces opposite to the building structure 10) that are parallel in the left-right direction can be made flush, thus making it easy to form the burn-off layer.

[0041] Furthermore, the positioning of the second planar burn-off material 53 relative to the corner burn-off material 51 can be achieved simply by fitting the second planar side fitting portion 53a of the second planar burn-off material 53 into the second corner side fitting portion 51f of the corner burn-off material 51. In other words, by simply fitting the second planar side fitting portion 53a of the second planar burn-off material 53 into the second corner side fitting portion 51f of the corner burn-off material 51, the surface of the second planar burn-off material 53 (the surface opposite to the building structure 10) and the surface of the front and rear corner burn-off materials 51 (the surfaces opposite to the building structure 10) that are parallel in the front-to-back direction can be made flush, thus making it easy to form the burn-off layer.

[0042] 《Second Embodiment》 Next, a second embodiment of the present invention will be described with reference to Figures 7 and 8. Elements common to the first embodiment described above are denoted by the same reference numerals, and their descriptions are omitted or simplified.

[0043] As shown in Figure 7(a), the column member 2 of this embodiment has a shape in which the four corners of a rectangle are cut out in a rectangular shape in a plan view (cross-sectional view). Of course, the column member 2 (the column member with its four corners cut out) has sufficient structural strength. Furthermore, in this embodiment, as shown in Figure 7(b), even when the column member 2 is covered with the fire-resistant covering material 4, the four corners of the rectangle are cut out in a rectangular shape in a plan view (cross-sectional view). That is, the four outer corners of the building structure 10, which consists of the column member 2 and the fire-resistant covering material 4, are provided with rectangular cutouts 11 in a plan view, running vertically.

[0044] The burnable material 5 in this embodiment includes at least two types: corner burnable material 54 that covers the outer corners of the building structure 10, and flat burnable material 55 that covers the parts of the building structure 10 other than the outer corners. The corner burn-off material 54 of this embodiment is configured to cover two external corners of the building structure 10 with a single corner burn-off material 54. That is, the corner burn-off material 54 is configured to cover both the external corner formed by the first surface (front and rear) of the building structure 10 and the second surface (left surface) perpendicular to the first surface, and the external corner formed by the first surface of the building structure 10 and the third surface (right surface) perpendicular to the first surface.

[0045] Specifically, the corner burn-through material 54 is a U-shaped member in plan view, comprising a planar covering portion 54a that covers the first surface (front and rear) of the building structure 10, and protruding portions 54b provided at both ends (left and right ends) of the planar covering portion 54a, with at least a portion of them positioned within the notch 11. Furthermore, the planar burn-through material 55 is a U-shaped member in plan view, comprising a planar covering portion 55a that covers the surfaces (left and right surfaces) perpendicular to the first surface of the building structure 10, and protruding portions 55b provided at both ends (front and rear ends) of the planar covering portion 55a, with at least a portion of them positioned within the notch 11.

[0046] The width dimension (length in the left-right direction) of the corner burn-through material 54 is set to be approximately the same as the sum of the width dimension (length in the left-right direction) of the building structure 10 and twice the width dimension (length in the left-right direction) of the flat covering portion 55a of the flat burn-through material 55. Therefore, when the front and rear corner burn-off material 54 and the left and right flat burn-off material 55 are joined so that the left end surface of the front and rear corner burn-off material 54 and the surface of the left flat burn-off material 55 (the surface opposite to the building structure 10) are flush, and the right end surface of the front and rear corner burn-off material 54 and the surface of the right flat burn-off material 55 (the surface opposite to the building structure 10) are flush, the flat covering portion 55a of the left and right flat burn-off material 55 will be in contact with the building structure 10, as shown in Figure 8.

[0047] Hereinafter, the process of joining the front and rear corner burn-off material 54 and the left and right flat burn-off material 55 such that the left end surface of the front and rear corner burn-off material 54 and the surface of the left flat burn-off material 55 are flush, and the right end surface of the front and rear corner burn-off material 54 and the surface of the right flat burn-off material 55 are flush, will be referred to as "assembling the corner burn-off material 54 and the flat burn-off material 55."

[0048] The projection dimension (length in the front-to-back direction) of the protruding portion 54b of the corner burn-through material 54 is set such that, when the flat covering portion 54a of the corner burn-through material 54 is in contact with the first surface (front and rear surface) of the building structure 10, the tip surface of the protruding portion 54b contacts the end surface of the flat burn-through material 55. Therefore, when the corner burn-off material 54 and the flat burn-off material 55 are assembled, the flat covering portion 54a of the front and rear corner burn-off material 54 will be in contact with the building structure 10, as shown in Figure 8.

[0049] Furthermore, the distance L23 between one protruding portion 54b and the other protruding portion 54b of the corner burn-off material 54 is set to be longer than the width dimension L11 of the front-to-rear ends (front end and rear end) of the building structure 10 (L11 <L23)。 Therefore, when the corner burn-off material 54 and the flat burn-off material 55 are assembled, the protruding portions 54b of the front and rear corner burn-off materials 54 are separated from the building structure 10, as shown in Figure 8.

[0050] Furthermore, the distance L24 between one protrusion 55b and the other protrusion 55b in the flat-type burn-through material 55 is set to be longer than the width L12 of the left and right ends (left end, right end) of the building structure 10 (L12 <L24)。 Furthermore, the projection dimensions (length in the left-right direction) of the protruding portion 55b of the flat burning material 55 are set such that, when the flat covering portion 55a of the flat burning material 55 is in contact with the surfaces (left and right surfaces) perpendicular to the first surface of the building structure 10, the tip surface of the protruding portion 55b does not come into contact with the building structure 10. Therefore, when the corner burn-off material 54 and the flat burn-off material 55 are assembled, the protruding portions 55b of the left and right flat burn-off materials 55 are separated from the building structure 10, as shown in Figure 8.

[0051] In this embodiment, the fire-resistant covering material 4 that constitutes the front-to-rear ends (front end and rear end) of the building structure 10 does not have both end faces (left end and right end face) in contact with the column members 2 (structural members). Also, in this embodiment, the fire-resistant covering material 4 that constitutes the left-to-right ends (left end and right end) of the building structure 10 does not have both end faces (front end and rear end face) in contact with the column members 2 (structural members). Therefore, as a construction error, there is a high possibility that the positions of both end faces of the fire-resistant covering material 4 that constitute the ends of the building structure 10 will be misaligned.

[0052] In this embodiment, the shape and dimensions of the burn-through material 5 are set to the shape and dimensions described above. Specifically, the shape and dimensions are set such that a gap is formed between the burn-through layer formed by assembling the burn-through material 5 (assembling the corner burn-through material 54 and the flat burn-through material 55) and the end face of the fire-resistant covering material 4 that constitutes the end of the building structure 10. Therefore, by simply assembling the corner burn-off material 54 and the planar burn-off material 55 around the building structure 10, a burn-off layer with a gap can be formed between the corner and the parts of the building structure 10 where construction errors are likely to occur (the end faces of the fire-resistant covering material 4 that constitute the ends of the building structure 10). Since the construction errors can be absorbed by this gap, there is no need to consider construction errors. Consequently, there is no need to measure the dimensions of the building structure 10 after the column members 2 (structural members) have been covered with the fire-resistant covering material 4 to construct the building structure 10, making it easy to form a burn-off layer around the building structure 10.

[0053] Furthermore, in this embodiment, the dimensions of the burnable material 5 are set such that, when the burnable material 5 is assembled to form a burnable layer, a portion of the corner burnable material 54 (a portion of the protruding portion 54b) is positioned within the notch 11 of the building structure 10. Therefore, the position of the corner burn-off material 54 relative to the building structure 10 does not shift significantly, making it easy to assemble the burn-off material 5 and to fix the assembled burn-off material 5 in place. The means of joining the burnable materials 5 together may be fasteners (such as screws), adhesives, or a combination of both. Furthermore, when fixing the burnable material 5 to the building structure 10, the means of fixing may be fasteners (screws, etc.), adhesive, or a combination of both.

[0054] 《Method of constructing pillars》 Next, an example of a construction method for column 1 in the second embodiment will be described. First, the column material 2 (a column material with notches cut into all four corners), the fire-resistant covering material 4, and the charring material 5 are transported from the factory to the construction site. Next, column members 2 are erected on the upper surface of the lower structural part (not shown), and the column members 2 are covered with fire-resistant covering material 4 to form the building structure 10.

[0055] Next, a portion of the corner burn-off material 54 (a portion of the left and right protrusions 54b) is placed within the left and right notches 11 of the building structure 10. This allows for the approximate positioning of the two front and rear corner burn-off materials 54, that is, the approximate positioning of the four corner portions in the burn-off layer.

[0056] Next, the two corner burn-off materials 54, which are aligned in the front-to-back direction, are connected by the left-side flat burn-off material 55. At this time, the flat burn-off material 55 and the corner burn-off material 54 are joined together so that the surface of the flat burn-off material 55 and the left end surface of the corner burn-off material 54 are flush. Furthermore, the two corner burn-off materials 54, which are aligned in the front-to-back direction, are connected by the right-side flat burn-off material 55. At that time, the flat burn-off material 55 and the corner burn-off material 54 are joined so that the surface of the flat burn-off material 55 and the right end surface of the corner burn-off material 51 are flush. This makes it possible to form a burn-through layer around the building structure 10, with a gap between it and the parts of the building structure 10 where construction errors are likely to occur (the end faces of the fire-resistant covering material 4 that constitute the ends of the building structure 10). Finally, the surface of the burnable material 5 (the side opposite to the building structure 10) is covered with a decorative material or the like.

[0057] 《Third Embodiment》 Next, a third embodiment of the present invention will be described with reference to Figures 9 and 10. Elements common to the first embodiment described above are denoted by the same reference numerals, and their descriptions are omitted or simplified.

[0058] As shown in Figure 9(a), the column member 2 of this embodiment has a shape in which the four corners of a rectangle are cut out in a rectangular shape in a plan view (cross-sectional view). Of course, the column member 2 (the column member with the four corners cut out) has sufficient structural strength. The building structure 10 of this embodiment is composed of wooden structural members (columns 2, etc.) that constitute the frame of the building, a fire-resistant covering material 4 (first fire-resistant covering material) that covers the frame, and a second fire-resistant covering material 6 that is in contact with the surface of the fire-resistant covering material 4 (first fire-resistant covering material).

[0059] Specifically, the building structure 10 of this embodiment is composed of the building structure 10 of the second embodiment (structural frame material and fire-resistant coating material 4) and a second fire-resistant coating material 6 attached to the surface (left side, right side, front side, and rear side) of the building structure 10 of the second embodiment. The second fire-resistant coating material 6 in this embodiment is reinforced gypsum board, but is not limited to this, and may be other types of fire-resistant coating materials. Furthermore, in this embodiment, the main body of the building structure 10 (structural frame material and fire-resistant covering material 4) is covered by a single second fire-resistant covering material 6, but it is not limited to this, and may be covered by multiple layers of the second fire-resistant covering material 6.

[0060] In the fire-resistant covering material 4 (first fire-resistant covering material) and the second fire-resistant covering material 6 that constitute the front and rear ends (front end and rear end) of the building structure 10, the width dimension (length in the left-right direction) of the second fire-resistant covering material 6 is set to be shorter than the width dimension (length in the left-right direction) of the fire-resistant covering material 4 (first fire-resistant covering material). In other words, both ends (left end and right end) of the fire-resistant covering material 4 (first fire-resistant covering material) are exposed on the surface (the side opposite to the building structure 10) and are not covered by the second fire-resistant covering material 6. Furthermore, in the fire-resistant covering material 4 (first fire-resistant covering material) and the second fire-resistant covering material 6 that constitute the left and right ends (left end and right end) of the building structure 10, the width dimension (length in the front-to-back direction) of the second fire-resistant covering material 6 is set to be shorter than the width dimension (length in the front-to-back direction) of the fire-resistant covering material 4 (first fire-resistant covering material). In other words, both ends (front end and rear end) of the fire-resistant covering material 4 (first fire-resistant covering material) are exposed on the surface (the side opposite to the building structure 10) and are not covered by the second fire-resistant covering material 6. Therefore, in this embodiment, as shown in Figure 9(b), the building structure 10, which consists of column members 2, fire-resistant covering material 4 (first fire-resistant covering material), and second fire-resistant covering material 6, has four external corners, each of which is provided with a notch 11 that combines a rectangular shape in plan view (shown by dashed lines in Figure 9(b)) and an L-shape in plan view, extending along the vertical direction.

[0061] The burn-through material 5 in this embodiment includes at least one type of corner burn-through material 56 that covers the outer corner of the building structure 10. The corner burn-through material 56 is an L-shaped member in plan view, comprising a first covering portion 56a that covers the surfaces (front and rear) of the building structure 10 that are parallel in the left-right direction, and a second covering portion 56b that covers the surfaces (left and right) of the building structure 10 that are parallel in the front-rear direction. The thickness dimension (length in the front-to-back direction) of the first covering portion 56a is set to be approximately the same as the thickness dimension of the second fire-resistant covering material 6. Similarly, the thickness dimension (length in the front-to-back direction) of the second covering portion 56b is also set to be approximately the same as the thickness dimension of the second fire-resistant covering material 6.

[0062] Furthermore, the left-right dimensions (length in the left-right direction) of the corner burn-through material 56 and the width dimension (length in the left-right direction) of the second fire-resistant covering material 6 parallel to the left-right direction are set such that, when the second covering portion 56b of the corner burn-through material 56 is in contact with the surface of the fire-resistant covering material 4 (first fire-resistant covering material) that constitutes the left-right ends (left end, right end) of the building structure 10, a gap is formed between the end face of the first covering portion 56a of the corner burn-through material 56 and the end face of the second fire-resistant covering material 6 that constitutes the front-rear ends (front end, rear end) of the building structure 10. Furthermore, the front-to-back dimensions (length in the front-to-back direction) of the corner burn-through material 56 and the width dimension (length in the front-to-back direction) of the second fire-resistant covering material 6 parallel to the front-to-back direction are set such that, when the first covering portion 56a of the corner burn-through material 56 is in contact with the surface of the fire-resistant covering material 4 (first fire-resistant covering material) that constitutes the front-to-back ends (front end and rear end) of the building structure 10, a gap is formed between the end face of the second covering portion 56b of the corner burn-through material 56 and the end face of the second fire-resistant covering material 6 that constitutes the left-to-right ends (left end and right end) of the building structure 10.

[0063] Similar to the second embodiment, in this embodiment as well, the fire-resistant covering material 4 (first fire-resistant covering material) that constitutes the front-to-back ends of the building structure 10 does not have both end faces (left end face, right end face) in contact with the column members 2 (structural members), and the fire-resistant covering material 4 (first fire-resistant covering material) that constitutes the left-to-right ends of the building structure 10 does not have both end faces (front end face, rear end face) in contact with the column members 2 (structural members). Therefore, as a construction error, there is a high possibility that the positions of both end faces of the fire-resistant covering material 4 (first fire-resistant covering material) that constitutes the ends of the building structure 10 will be misaligned. Furthermore, in this embodiment, the second fire-resistant covering material 6 that constitutes the front-to-back ends of the building structure 10 does not have both end faces (left end face, right end face) in contact with the column member 2 (structural material), and the second fire-resistant covering material 6 that constitutes the left-to-right ends of the building structure 10 does not have both end faces (front end face, rear end face) in contact with the column member 2 (structural material). Therefore, as a construction error, there is a high possibility that the positions of both end faces of the second fire-resistant covering material 6 that constitutes the ends of the building structure 10 will be misaligned.

[0064] In this embodiment, the shape and dimensions of the burn-through material 5 and the shape and dimensions of the notch 11 are set to the shapes and dimensions described above. That is, the shape and dimensions are set so that a gap is formed between the burn-through layer formed by attaching the burn-through material 5 (covering the outer corner of the building structure 10 with the corner burn-through material 56) and the end faces of the fire-resistant covering materials 4 and 6 that constitute the ends of the building structure 10. Therefore, by simply attaching the corner burn-off material 56 to the outer corner of the building structure 10, a burn-off layer with a gap can be formed between the corner and the part of the building structure 10 where construction errors are likely to occur (the end faces of the fire-resistant covering materials 4 and 6 that constitute the ends of the building structure 10). Since the construction errors can be absorbed by this gap, there is no need to consider construction errors. Consequently, there is no need to measure the dimensions of the building structure 10 after the column material 2 (structural material) has been covered with fire-resistant covering materials 4 and 6 to construct the building structure 10, making it easy to form the burn-off layer at the outer corner of the building structure 10.

[0065] Furthermore, as mentioned above, in this embodiment, the thickness dimension (length in the front-to-back direction) of the first covering portion 56a of the corner burn-off material 56 is set to be approximately the same as the thickness dimension (length in the front-to-back direction) of the second fire-resistant covering material 6, and the thickness dimension (length in the front-to-back direction) of the second covering portion 56b is set to be approximately the same as the thickness dimension (length in the front-to-back direction) of the second fire-resistant covering material 6. Therefore, the entire corner burn-off material 56 of this embodiment is located within the notch 11. For example, the thickness of at least one of the first covering portion 56a and the second covering portion 56b may be made longer than the thickness of the second fire-resistant covering material 6 so that a portion of the corner burn-through material 56 is not placed inside the notch 11. Furthermore, the means for fixing the burnable material 5 to the building structure 10 may be fasteners (such as screws), adhesives, or a combination of both.

[0066] In this embodiment, in order to improve the fire resistance of parts other than the corners (parts where a burnable layer is not formed), multiple fire-resistant covering materials (i.e., fire-resistant covering material 4 (first fire-resistant covering material) and second fire-resistant covering material 6) are provided in parts other than the corners. Therefore, as shown in Figure 11, for example, if the entire structural frame (column members, etc.) is covered with multiple fire-resistant coatings, it is possible to obtain high fire resistance even without providing a burn-through layer.

[0067] However, the corners (and their surrounding areas) are areas where there are boundaries between fire-resistant coating materials that are perpendicular to each other (boundaries between fire-resistant coating materials parallel in the front-to-back direction and fire-resistant coating materials parallel in the left-to-right direction). The boundaries between mutually orthogonal fire-resistant coatings are formed continuously from the outside to the inside (structural material), and can therefore become heat transfer paths connecting the outside and inside during a fire. Consequently, in the configuration shown in Figure 11, the entrance to the heat transfer path (indicated by the dashed arrow in Figure 11) is not covered with the burn-through layer, making it easier for heat to be transferred to the inside of the building structure 10 (structural material) during a fire.

[0068] Therefore, in this embodiment, the corners (and their surroundings) where the boundaries between mutually orthogonal fire-resistant coating materials exist are covered with a burn-through layer (burn-through material 5), while multiple fire-resistant coating materials are provided in the remaining areas. In other words, in this embodiment, in order to improve the fire resistance of the corners (and their surroundings), which are susceptible to heat even when covered with fire-resistant coating materials, the corners (and their surroundings) are covered with a burn-through layer (burn-through material 5), making it possible to obtain higher fire resistance than the configuration shown in Figure 11.

[0069] 《Method of constructing pillars》 Next, an example of a construction method for column 1 in the third embodiment will be described. First, the column material 2 (a column material with notches cut into all four corners), the fire-resistant covering material 4, and the charring material 5 are transported from the factory to the construction site. Next, a column member 2 is erected on the upper surface of the lower structural part (not shown), and the column member 2 is covered with a fire-resistant covering material 4 (first fire-resistant covering material) and a second fire-resistant covering material 6 to form the building structure 10.

[0070] Next, corner burn-off material 54 is placed within the notch 11 of the building structure 10. This allows for the positioning of the four corner burn-off material 54 in the front, back, left, and right directions, that is, the positioning of the four corner sections in the burn-off layer. This makes it possible to form a burn-through layer at the outer corner of the building structure 10, with a gap between it and the part of the building structure 10 where construction errors are likely to occur (the end faces of the fire-resistant coating material 4 (first fire-resistant coating material) and the second fire-resistant coating material 6 that constitute the end of the building structure 10). Finally, the surfaces of the second fire-resistant coating material 6 and the burn-through material 5 (the side opposite to the building structure 10) are covered with decorative material or the like.

[0071] "effect" The above embodiments and modifications provide the following excellent effects. Specifically, the building has a fire-resistant structure comprising a building structure 10 and a burnable material 5 that forms a burnable layer. The building structure 10 has an external corner with a notch 11, and the burnable material 5 includes at least corner burnable materials 51, 54, and 56 that cover the external corner, with at least a portion of the corner burnable materials 51, 54, and 56 positioned within the notch 11.

[0072] In other words, since the burnable material 5 includes corner burnable materials 51, 54, and 56, at least a portion of which are placed within the notches 11 provided at the outer corners of the building structure 10, the corner portion of the burnable layer can be positioned by the notches 11 provided at the outer corners of the building structure 10 and the corner burnable materials 51, 54, and 56. Therefore, since the positioning of the burnable material 5 is easy, the workability when forming the burnable layer can be improved.

[0073] Furthermore, as in the first embodiment and the first modified example, the burn-through material 5 can include flat burn-through materials 52 and 53 that cover parts of the building structure 10 other than the outer corners, and the flat burn-through materials 52 and 53 can be placed between the two corner burn-through materials 51.

[0074] With this configuration, the burnable material 5 includes a corner burnable material 51 and flat burnable materials 52 and 53, which are burnable materials that cover the parts of the building structure 10 other than the outer corners and are positioned between the two corner burnable materials 51. Therefore, after determining the approximate position of the corner portion in the burn-through layer using the notch 11 provided at the outer corner of the building structure 10 and the corner burn-through material 51, the corner burn-through material 51 and the flat burn-through material 52, 53 can be positioned (placed in the predetermined position) simply by connecting the two corner burn-through materials 51 with the flat burn-through materials 52, 53. In other words, since the positioning of the burn-through material 5 is easy, the workability when assembling multiple types of burn-through material 5 to form a burn-through layer can be improved.

[0075] Furthermore, as in the first modified example, corner-side fitting portions 51e and 51f can be provided on the corner burn-off material 51, and planar-side fitting portions 52a and 53a that can be fitted with the corner-side fitting portions 51e and 51f can be provided on the planar burn-off materials 52 and 53.

[0076] With this configuration, the planar burn-off materials 52 and 53 can be positioned relative to the corner burn-off material 51 simply by fitting the corner-side fitting parts 51e and 51f with the planar-side fitting parts 52a and 53a. Therefore, since the positioning of the burn-off material 5 is easy, the workability when assembling multiple types of burn-off material 5 to form a burn-off layer can be improved.

[0077] Furthermore, as in the second embodiment, the building structure 10 may have an outer corner formed by a first surface (front and rear) and a second surface (left) perpendicular to the first surface, and an outer corner formed by a first surface (front and rear) and a third surface (right) perpendicular to the first surface, and the corner burn-off material 54 may have a flat covering portion 54a that covers the first surface and protruding portions 54b provided at both ends of the flat covering portion 54a, with at least a part of them positioned within the notch 11.

[0078] With this configuration, one corner burn-through material 54 can cover the two protruding corners and the first surface (front and rear) of the building structure 10. Therefore, after determining the approximate position of the corner portion in the burn-through layer using the notch 11 provided at the outer corner of the building structure 10 and the corner burn-through material 54, the corner burn-through material 54 and the planar burn-through material 55 can be positioned (placed in the predetermined position) simply by joining the corner burn-through material 54 to the planar burn-through material 55 (burn-through material that covers the second surface (left surface) and the third surface (right surface)). In other words, since the positioning of the burn-through material 5 is easy, the workability when assembling multiple types of burn-through material 5 to form a burn-through layer can be improved. Furthermore, since one corner burn-off material 54 can cover both external corners of the building structure 10, the number of parts can be reduced compared to the case where the burn-off material covering one external corner and the burn-off material covering the other external corner are separate components, and the workability when forming the burn-off layer can be improved.

[0079] Furthermore, as in the third embodiment, the building structure 10 comprises wooden structural members (architectural panels 21, column members 2, beam members, adjustment members 22, etc.) that constitute the frame of the building, a first fire-resistant covering material (fire-resistant covering material 4) that covers the frame, and a second fire-resistant covering material 6 that is in contact with the surface of the first fire-resistant covering material, and the corner burn-off material 56 comprises a first covering portion 56a and a second covering portion 56b perpendicular to the first covering portion 56a, and the end of the first covering portion 56a is It is possible that the end of the second covering portion 56b is in contact with the surface of the first fire-resistant covering material parallel to a predetermined direction (left-right direction), and that the end face of the end of the second covering portion 56b is in contact with the surface of the first fire-resistant covering material parallel to a predetermined direction, and that the end of the second covering portion 56b is in contact with the surface of the first fire-resistant covering material perpendicular to a predetermined direction (left-right direction), and that the end face of the end of the second covering portion 56b is in contact with the end face of the second fire-resistant covering material 6 perpendicular to the surface of the first fire-resistant covering material perpendicular to a predetermined direction.

[0080] With this configuration, by simply bringing both ends of the corner burn-off material 54 into contact with the surface of the first fire-resistant coating material (fire-resistant coating material 4), which has a second fire-resistant coating material 6 on its surface, at least a portion of the corner burn-off material 54 can be positioned within the notch 11 provided at the outer corner of the building structure 10. In other words, since the positioning of the burn-off material 5 is easy, the workability when forming the burn-off layer can be improved. Furthermore, the main body of the building structure 10 (the structural frame and the first fire-resistant covering material (fire-resistant covering material 4)) can be covered by the corner burn-off material 54 and the second fire-resistant covering material 6. Therefore, since it is only necessary to place the burn-off material 5 (corner burn-off material 54) in the parts not covered by the second fire-resistant covering material 6 (outside corners), the number of parts can be reduced and the workability when forming the burn-off layer can be improved.

[0081] Furthermore, as shown in the embodiment and modified examples, the dimensions of the burnable material 5 can be set in advance to a size that creates a gap between the burnable layer formed by the burnable material 5 and the building structure 10. By configuring it in this way, simply by placing the burn-through material 5, a gap is created between the burn-through layer formed by the burn-through material 5 and the building structure 10, making it possible to form the burn-through layer without considering errors in the building structure 10. In other words, the gap created between the burn-through layer formed by the burn-through material 5 and the building structure 10 can absorb errors in the building structure 10 (for example, construction errors of the fire-resistant coating materials 4 and 6), making it possible to form the burn-through layer without considering errors in the building structure 10, thereby improving the workability when forming the burn-through layer.

[0082] Furthermore, in recent years, there has been a growing demand for the realization of a decarbonized society through the promotion of carbon neutrality, which aims to achieve virtually zero carbon dioxide emissions, and for the achievement of the Sustainable Development Goals (SDGs). In the construction industry, efforts are also being made to use wood, which reduces carbon dioxide emissions, for buildings. The fire-resistant structures in the above embodiments and modifications are fire-resistant structures for wooden buildings, and therefore can contribute to the realization of a decarbonized society through the promotion of carbon neutrality and the achievement of the SDGs.

[0083] In the above embodiments and modifications, column members 2 were used as structural members, but the invention is not limited to this. That is, the structural members may be, for example, building panels 21 or beam members. When the structural members are building panels 21, it is difficult to make notches at the outer corners of the building panels, so for example, as shown in Figures 12 and 13, notches may be made at the outer corners of the adjustment members 22 and the adjustment members 22 may be attached to the end face (frame member A) of the building panel 21. In Figures 12 and 13, the column members 2 in the first embodiment are shown as being replaced with building panels 21, but the same applies when the column members 2 in other embodiments and modifications are replaced with building panels 21.

[0084] Furthermore, in the above embodiments and modifications, the notched portion 11 is formed by providing a notch in the structural frame material and attaching the fire-resistant coating material 4 to the structural frame material while maintaining the shape of the notch, but the invention is not limited to this. For example, as shown in Figure 14, the notch 11 may be formed by assembling multiple fire-resistant covering materials 4 as appropriate, without making a notch in the structural member of the frame (column 2 in the example shown in Figure 14).

[0085] Furthermore, while the above embodiments and modifications show a fire-resistant structure for column 1, the invention is not limited thereto. That is, the fire-resistant structure of the present invention may be any of the following: a fire-resistant structure for column 1, a fire-resistant structure for beams, a fire-resistant structure for walls, a fire-resistant structure for floors, a fire-resistant structure for ceilings, etc. Figures 12 and 13 show an example of a fire-resistant structure for a wall. Furthermore, the above embodiments and modifications can be combined as appropriate. [Explanation of Symbols]

[0086] 2 Pillar material (frame structure material) 4 Fireproof sheathing material (first fireproof sheathing material) 5. Burnable material 6 Second fireproof covering material 10. Building Structure 11 Notch 21. Building panels (structural materials) 22 Adjustment material (frame structure material) 51 Corner burn-through material 51e First corner side fitting section (corner side fitting section) 51f Second corner side fitting section (corner side fitting section) 52. Burnable material for the first flat surface (burnable material for flat surfaces) 52a First plane side fitting part (flat side fitting part) 53. Burnable material for the second flat surface (burnable material for flat surfaces) 53a Second flat side fitting part (flat side fitting part) 54 Corner burn-through material 54a Planar covering portion 54b Protrusion 56 Corner burn-off material 56a First covering part 56b Second covering part

Claims

1. The building has a fire-resistant structure, Building structure and It comprises a combustible material that forms a combustible layer, A notch is provided at the outer corner of the aforementioned building structure. The aforementioned burnable material includes at least a corner burnable material that covers the outer corner portion, The aforementioned corner burn-off material is positioned at least partially within the notch. The aforementioned building structure comprises a wooden structural frame that constitutes the building's frame, a first fire-resistant covering material that covers the frame, and a second fire-resistant covering material that is in contact with the surface of the first fire-resistant covering material. The corner burn-off material comprises a first covering portion and a second covering portion perpendicular to the first covering portion. The first covering portion has an end that is in contact with the surface of the first fire-resistant covering material parallel to a predetermined direction, and the end face of the said end faces the end face of the second fire-resistant covering material that is in contact with the said surface. The fire-resistant structure is characterized in that the end of the second covering portion is in contact with the surface of the first fire-resistant covering material perpendicular to the predetermined direction, and the end face of the said end faces the end face of the second fire-resistant covering material that is in contact with the said surface.

2. A fire-resistant structure according to claim 1, The dimensions of the burnable material are set such that a gap is formed between the burnable layer formed by the burnable material and the building structure, making it a fire-resistant structure.

Images