JP2019173347A - Fireproofing covering structure and its construction method - Google Patents

Abstract

To provide a fireproofing covering structure that can be easily constructed even though the trunk edge is integrally provided on the face material.SOLUTION: A fireproofing covering structure 10 comprises a face member 11, a trunk edge 12 integrally provided on one surface of the face member 11, a steel structure material 13 provided to extend along the trunk edge 12 with an interval on the opposite side to the face material 11 side of the trunk edge 12, and a fireproof covering layer 14 provided so as to cover the trunk edge 12 and the steel structure material 13 on one side of the face material 11 and to bridge between the trunk edge 12 and the steel structure material 13.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fireproof covering structure and a construction method thereof.

  In steel-frame building, in order to protect heat-sensitive steel structure materials such as steel columns and steel beams from heat at the time of fire, it is widely practiced to spray the steel structure material with a fireproof coating spray. However, when the steel structure material is provided immediately behind the wall material, the gap between them is small, and it is difficult to cover the surface of the steel structure material by spraying the fireproof coating material on the wall material side. Therefore, a gap between the wall material and the steel structure material is closed with a backup material, and a fireproof coating spray material is sprayed from above to cover the gap. For example, Patent Document 1 discloses that a gap between a wall material and a steel column provided behind the wall material is closed with a backup material composed of a rock wool heat insulating plate, and a steel frame on the back side of the wall material. A fireproof coating structure is disclosed in which a fireproof coating spray material in which rock wool is mixed with cement slurry is sprayed to cover the pillar and the backup material.

JP 2017-210807 A

  However, if the back edge of the wall material is integrally provided with a body edge and a steel structure material is provided behind the wall edge so as to extend along the body edge, the body edge will be in the way and the backup material will be installed. There is a problem with difficulty.

  The subject of this invention is providing the fireproof coating structure which can be simply constructed, although a trunk edge is integrally provided in the face material.

  In order to solve the above-described problems, in the present invention, a fireproof coating layer is provided so as to cover the trunk edge and the steel structure material on the back surface side of the face material and to span between the trunk edge and the steel structure material.

  Specifically, in the invention according to claim 1, the face material, the body edge integrally provided on the one surface of the face material, and the space on the side opposite to the face material side of the body edge are spaced apart. A steel structure material provided so as to extend along the trunk edge, and to cover the trunk edge and the steel structure material on the one side of the face material, and between the trunk edge and the steel structure material It has a fireproof covering layer provided so as to hang over.

  According to the above configuration, the fireproof covering layer covers the trunk edge and the steel structure material on one side of the face material, and is provided so as to span between the trunk edge and the steel structure material. By covering with a fire-resistant coating layer, it is possible to simply construct a fire-resistant coating structure without the need for labor and processes for constructing a base such as a backup material, etc., even though the body edge is integrally provided on the face material be able to.

  The invention according to claim 2 is the fireproof coating structure according to claim 1, wherein a span portion between the trunk edge and the steel structure material in the fireproof coating layer is a single layer of the fireproof coating layer. It is configured.

  According to the above configuration, since the spanning portion in the fireproof coating layer is composed of a single layer of the fireproof coating layer, the configuration and construction of the fireproof coating structure can be simplified without using a backup material. Can do.

  According to a third aspect of the present invention, in the fireproof coating structure according to the first aspect, the spanning portion between the trunk edge and the steel structure material in the fireproof coating layer is the trunk edge and the steel frame. It is provided on the lath spanned between the structural members.

  According to the above configuration, since the span portion in the fireproof coating layer is provided on the lath, the lath exists in the lower layer of the span coat portion, and more than when forming the span portion of the fireproof coating layer. Good workability can be obtained.

  According to a fourth aspect of the present invention, in the fireproof coating structure according to any one of the first to third aspects, the fireproof coating layer is composed of a solidified product of the fireproof coating spray material.

  According to said structure, a fireproof coating layer can be formed by spraying the fireproof coating spray material of a general construction method.

  According to the invention which concerns on Claim 5, in the fireproof coating structure in any one of Claims 1 thru | or 4, the surface of the said trunk edge which the said fireproof coating layer spans, and the surface of the said steel structure material are on the same plane It is characterized by that.

  According to said structure, since the surface of the trunk edge which a fireproof coating layer spans, and the surface of a steel structure material are on the same plane, the better workability in forming the spanning part of a fireproof coating layer is obtained. be able to.

  According to a sixth aspect of the present invention, there is provided a face material, a body edge integrally provided on one surface of the face material, and a space on the opposite side of the body edge from the face material side, and the body edge And a steel structure material provided so as to extend along the fireproof covering structure covering the trunk edge and the steel structure material on the one side of the face material, and the trunk edge A fireproof coating layer is provided so as to span between the steel structure materials.

  According to said structure, a fireproof coating | coated structure can be simply constructed | assembled, although the trunk edge is integrally provided in the face material.

  The invention according to claim 7 is the construction method of the fireproof coating structure according to claim 6, wherein the fireproof coating layer is formed by spraying a fireproof coating spray material.

  According to said structure, a fireproof coating layer can be formed by spraying the fireproof coating spray material of a general construction method.

  According to the present invention, it is possible to easily construct a fireproof coating structure without requiring the labor and process of constructing a base such as a backup material, while the body edges are integrally provided on the face material.

It is sectional drawing of the fireproof coating structure which concerns on Embodiment 1. FIG. It is the 1st explanatory view showing the construction method of the fireproof covering structure concerning Embodiment 1. It is the 2nd explanatory view showing the construction method of the fireproof covering structure concerning Embodiment 1. It is sectional drawing of the fireproof coating structure which concerns on Embodiment 2. FIG. It is the 1st explanatory view showing the construction method of the fireproof covering structure concerning Embodiment 2. It is the 2nd explanatory view showing the construction method of the fireproof covering structure concerning Embodiment 2.

  Hereinafter, embodiments will be described in detail.

(Embodiment 1)
FIG. 1 shows a fireproof covering structure 10 according to the first embodiment.

  The fireproof covering structure 10 according to the first embodiment includes a wall material (face material) 11, a pair of trunk edges 12, a steel column (steel structure material) 13, and a fireproof covering layer 14.

  Examples of the wall material 11 include refractory surface materials such as a volcanic glassy multilayer board (manufactured by Dailite Daiken Kogyo Co., Ltd.), a gypsum board, and a calcium silicate board. The wall material 11 may be composed of a single material or may be composed of a composite material of a plurality of face materials. Note that a ceramic material siding or metal siding decorative material may be applied to the surface side of the wall material 11 or may be painted.

  Each of the pair of trunk edges 12 is made of C-shaped channel steel. The body edge 12 of the channel steel has a wide bottom surface portion 12a, a narrow side surface portion 12b extending in the orthogonal direction continuously to both ends in the width direction of the bottom surface portion 12a, and a width direction of each side surface portion 12b. An opening that extends in the length direction is formed between the lip portions 12c on both sides in the width direction, and has an extremely narrow lip portion 12c that extends continuously inward in the orthogonal direction at the end opposite to the bottom surface portion 12a side. Has been.

  The pair of trunk edges 12 are provided so that the openings face each other, extend in parallel in the vertical direction, and the outer side surface of each one side surface portion 12b abuts on the back surface (one side surface) of the wall material 11. ing. The wall material 11 is fixed to the trunk edge 12 by a fixing tool such as a screw or a bolt, whereby the trunk edge 12 is provided integrally with the wall material 11.

  The steel column 13 is composed of a square steel pipe having a square cross-sectional shape. The steel column 13 of the square steel pipe is provided so as to extend along the trunk edge 12 at a distance from the side of the trunk edge 12 opposite to the wall material 11 side. Further, the steel column 13 of the square steel pipe has a pair of first side surface portions 13a facing each other among the four side surface portions in parallel with the wall material 11 and a pair of remaining second side surface portions 13b facing each other. Is provided so as to be perpendicular to the wall material 11. The distance from the back surface of the wall material 11 to the steel column 13 is, for example, 350 mm or less.

  The fireproof coating layer 14 is formed of a solidified product of the fireproof coating spray material. The refractory coating layer 14 includes the outer side surfaces of the bottom surface portions 12a of the pair of trunk edges 12 on the back surface side (one side) of the wall material 11, and the first side surface portion 13a on the side away from the wall material 11 of the steel structure material. The outer side surface and the outer side surfaces of both the second side surface portions 13b are provided so as to span between the trunk edge 12 and the steel structure material on both sides. Therefore, the fireproof coating layer 14 is formed in a U-shaped cross section that is open to the wall material 11 side. From the viewpoint of obtaining high fire resistance, the thickness of the fireproof coating layer 14 is preferably 25 mm or more.

  A spanning portion 14 a between the trunk edge 12 and the steel structure material in the fireproof coating layer 14 is constituted by a single layer of the fireproof coating layer 14. As described above, the span portion 14a in the fireproof coating layer 14 is configured by a single layer of the fireproof coating layer 14, thereby simplifying the configuration and construction of the fireproof coating structure 10 without using a backup material. be able to. The spanning portion 14a is formed thicker than the portion covering the trunk edge 12 and the outer surface of the steel structure material, and covers part or all of the outer surface of the other side surface portion 12b of the trunk edge 12. It may be.

  According to the fireproof covering structure 10 according to the first embodiment having the above-described configuration, the fireproof covering layer 14 covers the trunk edge 12 and the steel column 13 on the back surface side of the wall material 11, and includes the trunk edge 12 and the steel column 13. Since it is provided so as to span the gap, as will be described later, by covering with the fireproof covering layer 14 including the trunk edge 12, the wall edge 11 is integrally provided on the wall material 11. It is possible to simply construct the fireproof covering structure 10 without requiring the labor and process of constructing a base such as a material.

  Next, the construction method of the fireproof covering structure 10 according to the first embodiment will be described.

  In the construction method of the fireproof coating structure 10 according to the first embodiment, first, a structure other than the fireproof coating layer 14 is configured as shown in FIG. 2A. Specifically, after the steel column 13 is erected, a pair of trunk edges 12 are provided in front thereof, and the wall material 11 is attached and fixed using the pair of trunk edges 12 as a support material. At this time, a pair of trunk edges 12 are integrally provided on the back surface of the wall material 11 so that their openings face each other and extend in parallel, and the outer side surfaces of the respective one side surface portions 12b are in contact with each other. The steel column 13 is provided so as to extend along the pair of trunk edges 12 at an interval on the opposite side of the trunk edge 12 from the wall material 11 side.

  And as shown to FIG. 2B, while covering the trunk edge 12 and the steel column 13 of the back surface side of the wall material 11, fireproof coating spraying material 14 'is spanned between the trunk edge 12 and the steel column 13. By spraying and forming the fireproof coating layer 14, the fireproof coating structure 10 which concerns on Embodiment 1 can be obtained. At this time, as the fireproof coating spray material 14 ′, for example, a cement slurry mixed with rock wool can be used.

  Here, when forming the fireproof coating layer 14 by spraying the fireproof coating material 14 ', it is particularly better when spraying the fireproof coating material 14' in a space where there is no base to form the spanning portion 14a. From the viewpoint of obtaining workability, it is preferable that the outer surface of the bottom surface portion 12a of the trunk edge 12 and the outer surface of the second side surface portion 13b of the steel column 13 are on the same plane.

  In addition, from the viewpoint of obtaining good workability when forming the spanning portion 14a, the interval between the steel column 13 and the trunk edge 12 in which the spanning portion 14a is configured is preferably narrow, Is preferably less than 45 mm.

(Embodiment 2)
FIG. 3 shows the fireproof covering structure 10 according to the second embodiment. In addition, the part of the same name as Embodiment 1 is shown using the same code | symbol as Embodiment 1. FIG.

  In the fireproof covering structure 10 according to the second embodiment, each of the bridging portions 14a on both sides of the fireproof covering layer 14 between the trunk edge 12 and the steel column 13 is connected to the outer surface of the bottom surface portion 12a of the trunk edge 12 and the steel column. 13 is provided on the lath 15 spanned between the outer side surfaces of the second side surface portions 13b. If the lath 15 is stretched between the trunk edge 12 and the steel column 13, each of the outer side surface of the bottom surface portion 12 a of the trunk edge 12 and the outer side surface of the second side surface portion 13 b of the steel column 13. , It may be provided so as to cover the whole or may be provided so as to cover a part.

  Examples of the lath 15 include a net lath such as a metal lath, a thin steel plate, and the like. The thickness of the lath 15 is preferably not less than 0.2 mm and not more than 1.0 mm, more preferably around 0.4 mm, from the viewpoints of handling properties, workability, and cost. Further, when the lath 15 is a thin steel plate, it can be screwed and there is no need to perform welding, so that there is an advantage that the workability is excellent.

  According to the fireproof coating structure 10 according to the second embodiment having the above-described configuration, since the spanning portion 14a in the fireproof coating layer 14 is provided on the lath 15, the lath 15 exists in the lower layer of the spanning portion 14a. Thus, better workability can be obtained when forming the spanning portion 14a of the fireproof coating layer 14. This effect is particularly noticeable when the distance between the steel column 13 and the trunk edge 12 constituting the spanning portion 14a is wide, specifically when the distance is 45 mm or more.

  Next, the construction method of the fireproof covering structure 10 according to the second embodiment will be described.

  In the construction method of the fireproof coating structure 10 according to the second embodiment, first, a structure other than the fireproof coating layer 14 is configured as shown in FIG. 4A. Specifically, after the steel column 13 is erected, a pair of trunk edges 12 are provided in front thereof, and the wall material 11 is attached and fixed using the pair of trunk edges 12 as a support material. A lath 15 is provided between the trunk edge 12 and the steel column 13 before or after the attachment to 12. At this time, a pair of trunk edges 12 are integrally provided on the back surface of the wall material 11 so that their openings face each other and extend in parallel, and the outer side surfaces of the respective one side surface portions 12b are in contact with each other. The steel column 13 is provided on the opposite side of the body edge 12 from the wall material 11 side and extends along the pair of body edges 12, and further on each of the both sides of the body edge 12 and the steel column 13. The lath 15 is provided between the outer surface of the bottom surface portion 12 a of the trunk edge 12 and the outer surface of the second side surface portion 13 b of the steel column 13.

  And as shown to FIG. 4B, while covering the trunk | drum 12 and the steel pillar 13 of the back surface side of the wall material 11, the lath 15 is covered in the part between the trunk | drum 12 and the steel pillar 13, and between these is covered. The fireproof coating structure 10 according to the second embodiment can be obtained by spraying the fireproof coating spray material 14 ′ to form the fireproof coating layer 14.

  Other configurations and operational effects are the same as those of the first embodiment.

(Other embodiments)
In the said Embodiment 1 and 2, although it was set as the structure which used the wall material 11 as the face material, it is not specifically limited to this, The structure which used the floor material and the ceiling material as the face material may be sufficient.

  In the said Embodiment 1 and 2, although the trunk | rim edge 12 was comprised with channel steel, it is not limited to this in particular, You may comprise with other building shafts, such as H-section steel. Moreover, in the said Embodiment 1 and 2, although it was set as the structure which provided the pair of trunk edges 12, it is not limited to this in particular, The structure which provided the single trunk edge may be sufficient.

  In the first and second embodiments, the steel column 13 is configured as a steel structure material. However, the present invention is not particularly limited to this, and the steel beam may be configured as a steel structure material.

  In the said Embodiment 1 and 2, although the fireproof coating layer 14 was comprised with the solidified material formed by spraying of the fireproof coating spraying material 14 ', it is not specifically limited to this, A fireproof coating layer is, for example, Alternatively, it may be constituted by a molding plate method using a calcium silicate fire-resistant coating plate or a winding method using a sheet-like fire-resistant coating material such as rock wool.

  The present invention is useful in the technical field of fireproof coating structures and construction methods thereof.

10 Fireproof coating structure 11 Wall material (face material)
12 trunk edge 12a bottom part 12b side part 12c lip part 13 steel column (steel structure material)
13a 1st side part 13b 2nd side part 14 Fireproof coating layer 14a Hanging part 14 'Fireproof coating spraying material 15 Lass

Specifically, in the invention according to claim 1, the face material, the body edge integrally provided on the one surface of the face material, and the space on the side opposite to the face material side of the body edge are spaced apart. A steel structure material provided so as to extend along the trunk edge, and to cover the trunk edge and the steel structure material on the one side of the face material, and between the trunk edge and the steel structure material Bei example a refractory coating layer provided so as to bridge the multiplied spanning portions between the furring strip and the steel structure material in said refractory coating layer, is formed only in the solid of fireproofing coatings It is the fireproof covering structure characterized by having.

According to the above configuration, the fireproof covering layer covers the trunk edge and the steel structure material on one side of the face material, and is provided so as to span between the trunk edge and the steel structure material. By covering with a fire-resistant coating layer, it is possible to simply construct a fire-resistant coating structure without the need for labor and processes for constructing a base such as a backup material, etc., even though the body edge is integrally provided on the face material be able to. Moreover, since the extending part in the fireproof coating layer is formed only by the solidified product of the fireproof coating spray material, the construction and construction of the fireproof coating structure can be simplified without using a backup material. Furthermore, a fireproof coating layer can be formed by spraying the fireproof coating spray material of a general construction method.

The invention according to claim 2 is characterized in that, in the fireproof covering structure according to claim 1, an interval between the trunk edge and the steel structure material forming the spanning portion is less than 45 mm. To do.

Inventions is according to claim 3, in fire protection structure according to claim 1 or 2, that surface and the surface of the steel structure material of the furring strip of the refractory coating layer to bridge are coplanar Features.

According to a fourth aspect of the present invention, there is provided a face material, a body edge integrally provided on one surface of the face material, and a space on the side opposite to the face material side of the body edge, and the body edge And a steel structure material provided so as to extend along the fireproof covering structure covering the trunk edge and the steel structure material on the one side of the face material, and the trunk edge A fireproof coating layer is provided by spraying a fireproof coating spray material so as to span between the steel structure material, and a spanning portion between the trunk edge and the steel structure material in the fireproof coating layer, It is formed only by the solidified material of the fireproof coating spray material .

According to said structure, a fireproof coating | coated structure can be simply constructed | assembled, although the trunk edge is integrally provided in the face material. Moreover, a fireproof coating layer can be formed by spraying the fireproof coating spray material of a general construction method.

Claims (7)

Face material,
A body edge integrally provided on one surface of the face material;
A steel structure material provided to extend along the trunk edge at an interval on the opposite side to the face material side of the trunk edge;
A fireproof coating layer provided to cover the trunk edge and the steel structure material on the one side of the face material, and to span between the trunk edge and the steel structure material,
A fireproof covering structure characterized by comprising: In the fireproof covering structure according to claim 1,
The fire-resistant coating structure, wherein a span portion between the trunk edge and the steel structure material in the fire-resistant coating layer is composed of a single layer of the fire-resistant coating layer. In the fireproof covering structure according to claim 1,
The bridging portion between the trunk edge and the steel structure material in the fireproof coating layer is provided on a lath spanned between the trunk edge and the steel structure material. Fireproof coating structure. The fireproof covering structure according to any one of claims 1 to 3,
The fireproof coating structure, wherein the fireproof coating layer is made of a solidified product of a fireproof coating spray material. In the fireproof covering structure according to any one of claims 1 to 4,
The surface of the trunk edge and the surface of the steel structure material spanned by the fireproof coating layer are on the same plane. A face material, a body edge integrally provided on one surface of the face material, and a space on the opposite side of the face material from the face material side and extending along the body edge. A construction method of a fireproof covering structure provided with a steel structure material,
A fireproof coating structure is provided, wherein a fireproof coating layer is provided so as to cover the trunk edge and the steel structure material on the one side of the face material and to span between the trunk edge and the steel structure material. Construction method. In the construction method of the fireproof covering structure described in Claim 6,
A construction method for a fireproof coating structure, wherein the fireproof coating layer is formed by spraying a fireproof coating spray material.

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