JP7009279B2 - Fireproof coating structure and its construction method - Google Patents

Description

The present invention relates to a fireproof coating structure and a method for constructing the same.

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

JP-A-2017-210807

However, if the furring strip is integrally provided on the back surface of the wall material and the steel frame structural material is provided behind the furring strip so as to extend along the furring strip, the furring strip becomes an obstacle and the backup material is installed. There is the problem of being difficult.

An object of the present invention is to provide a fireproof coating structure that can be easily constructed even though the furring strip is integrally provided on the face material.

In order to solve the above problems, in the present invention, the furring strip on the back surface side of the face material and the steel frame structural material are covered, and a fireproof coating layer is provided so as to extend between the furring strip and the steel frame structural material.

Specifically, in the invention according to claim 1, there is a space between the face material, the furring strip integrally provided on one surface of the facing material, and the furring strip on the side opposite to the facing material side. Between the steel frame structural material provided so as to extend along the furring strip, the furring strip on one side of the face material, the steel frame structural material, and between the furring strip and the steel frame structural material. It is provided with a fireproof coating layer provided so as to be crossed over, and the crossing portion between the furring strip and the steel frame structural material in the fireproof coating layer is formed only of a solidified material of the fireproof coating spraying material. It is a fireproof coating structure characterized by being present.

According to the above configuration, the fireproof coating layer covers the furring strip on one side of the face material and the steel frame structural material, and is provided so as to extend between the furring strip and the steel frame structural material. By covering with a fireproof coating layer including the above, the fireproof coating structure can be easily constructed without the trouble and process of constructing a base such as a backup material, even though the furring strip is integrally provided on the face material. be able to. Further, since the hanging portion of the fireproof coating layer is formed only of the solidified material of the fireproof coating spray material, the configuration and construction of the fireproof coating structure can be simplified without using a backup material. Further, the fireproof coating layer can be formed by spraying a fireproof coating spraying material by a general method.

The invention according to claim 2 is characterized in that, in the fireproof coating structure according to claim 1, the distance between the furring strip constituting the hanging portion and the steel frame structural material is less than 45 mm. do.

According to the third aspect of the present invention , in the fireproof coating structure according to the first or second aspect, the surface of the furring strip and the surface of the steel frame structural material overlaid by the fireproof coating layer are on the same plane. It is a feature.

According to the above configuration, since the surface of the furring strip over which the fireproof coating layer is hung and the surface of the steel frame structural material are on the same plane, better workability is obtained when forming the hangable portion of the fireproof coating layer. be able to.

In the invention according to claim 4 , the face material, the furring strip integrally provided on one side of the face material, and the furring strip on the side opposite to the face material side of the furring strip are spaced apart from each other. It is a method of constructing a fireproof coating structure including a steel frame structural material provided so as to extend along the above, covering the furring strip on one side of the facing material and the steel frame structural material, and with the furring strip. A fireproof coating layer is provided by spraying a fireproof coating spraying material so as to be bridged between the steel frame structural material, and the crossing portion between the furring strip and the steel frame structural material in the fireproof coating layer is described above. It is characterized by being formed only by a solidified material of a fireproof coating spray material .

According to the above configuration, the fireproof coating structure can be easily constructed even though the furring strip is integrally provided on the face material. Further, the fireproof coating layer can be formed by spraying a fireproof coating spraying material by a general method.

According to the present invention, even though the furring strip is integrally provided on the face material, the fireproof coating structure can be easily constructed without the need for labor and steps for constructing a base such as a backup material.

It is sectional drawing of the refractory coating structure which concerns on Embodiment 1. FIG. It is 1st explanatory drawing which shows the construction method of the refractory coating structure which concerns on Embodiment 1. FIG. It is a 2nd explanatory drawing which shows the construction method of the refractory coating structure which concerns on Embodiment 1. FIG. It is sectional drawing of the refractory coating structure which concerns on Embodiment 2. FIG. It is 1st explanatory drawing which shows the construction method of the refractory coating structure which concerns on Embodiment 2. It is a 2nd explanatory drawing which shows the construction method of the refractory coating structure which concerns on Embodiment 2. FIG.

Hereinafter, embodiments will be described in detail.

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

The fireproof coating structure 10 according to the first embodiment includes a wall material (face material) 11, a pair of furring strips 12, a steel frame column (steel frame structural material) 13, and a fireproof coating layer 14.

Examples of the wall material 11 include refractory surface materials such as volcanic vitreous multi-layer board (manufactured by Dailite Daiken Kogyo Co., Ltd.), gypsum board, and calcium silicate board. The wall material 11 may be made of a single material or a composite material of a plurality of face materials. The surface side of the wall material 11 may be pasted with a decorative material of ceramic siding or metal siding, or may be painted.

Each of the pair of furring strips 12 is made of C-shaped channel steel. The furring strip 12 of the channel steel has a wide bottom surface portion 12a, a narrow side surface portion 12b extending in a direction orthogonal to both ends of the bottom surface portion 12a in the width direction, and a side surface portion 12b in the width direction. It has an extremely narrow lip portion 12c extending inward in the orthogonal direction continuously at the end opposite to the bottom surface portion 12a side, and an opening extending in the length direction is formed between the lip portions 12c on both sides in the width direction. Has been done.

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

The steel frame column 13 is composed of a square steel pipe having a square cross section. The steel frame columns 13 of the square steel pipe are provided so as to extend along the furring strip 12 at intervals on the side opposite to the wall material 11 side of the furring strip 12. Further, in the steel frame column 13 of the square steel pipe, of the four side surface portions, the pair of first side surface portions 13a facing each other are parallel to the wall material 11, and the remaining pair of 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 frame column 13 is, for example, 350 mm or less.

The fireproof coating layer 14 is composed of a solidified material of the fireproof coating spray material. The fireproof coating layer 14 is the outer surface of each bottom surface portion 12a of the pair of furring strips 12 on the back surface side (one side) of the wall material 11, and the first side surface portion 13a on the side separated from the wall material 11 of the steel frame structural material. It is provided so as to cover the outer surface of the above surface and the outer surface of both second side surface portions 13b, and to extend between the furring strip 12 and the steel frame structural material on each of both sides. Therefore, the fireproof coating layer 14 is formed in a U-shape with a cross section opened on the wall material 11 side. The thickness of the fireproof coating layer 14 is preferably 25 mm or more from the viewpoint of obtaining high fire resistance.

The connecting portion 14a between the furring strip 12 and the steel frame structural material in the fireproof coating layer 14 is composed of a single layer of the fireproof coating layer 14. As described above, since the connecting portion 14a in the fireproof coating layer 14 is composed of a single layer of the fireproof coating layer 14, the configuration and construction of the fireproof coating structure 10 are simplified without using a backup material. be able to. The hanging portion 14a is formed to be thicker than the portion covering the furring strip 12 and the outer surface of the steel frame structural material, and covers a part or all of the outer surface of the other side surface portion 12b of the furring strip 12. May be.

According to the fireproof coating structure 10 according to the first embodiment of the above configuration, the fireproof coating layer 14 covers the furring strip 12 and the steel frame column 13 on the back surface side of the wall material 11, and the furring strip 12 and the steel frame column 13 are formed. Since it is provided so as to span the space, as will be described later, by covering with the fireproof coating layer 14 including the furring strip 12, even though the furring strip 12 is integrally provided on the wall material 11, it is backed up. The fireproof coating structure 10 can be easily constructed without the need for labor and steps for constructing a base such as a material.

Next, the construction method of the refractory coating 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, as shown in FIG. 2A, a structure other than the fireproof coating layer 14 is configured. Specifically, after the steel frame column 13 is erected, a pair of furring strips 12 are provided in front of the steel frame columns 13, and the wall member 11 is attached and fixed using the pair of furring strips 12 as support materials. At this time, a pair of furring strips 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 surfaces of the respective side surface portions 12b are in contact with each other. The steel frame columns 13 are provided so as to extend along the pair of furring strips 12 at intervals on the side opposite to the wall material 11 side of the furring strip 12.

Then, as shown in FIG. 2B, the fireproof coating spraying material 14'is applied so as to cover the furring strip 12 and the steel frame column 13 on the back surface side of the wall material 11 and to hang between the furring strip 12 and the steel frame column 13. By spraying to form the fireproof coating layer 14, the fireproof coating structure 10 according to the first embodiment can be obtained. At this time, as the refractory coating spray material 14', for example, a cement slurry mixed with rock wool can be used.

Here, it is better when the fireproof coating spraying material 14'is sprayed to form the fireproof coating layer 14, especially when the fireproof coating spraying material 14'is sprayed on the space where the base does not exist to form the bridged portion 14a. From the viewpoint of obtaining workability, it is preferable that the outer surface of the bottom surface portion 12a of the furring strip 12 and the outer surface of the second side surface portion 13b of the steel frame column 13 that the fireproof coating layer 14 spans are on the same plane.

Further, from the viewpoint of obtaining good workability when forming the hanging portion 14a, it is preferable that the distance between the steel frame column 13 forming the hanging portion 14a and the furring strip 12 is narrow, which is specific. It is preferably less than 45 mm.

(Embodiment 2)
FIG. 3 shows the fireproof coating structure 10 according to the second embodiment. The part having the same name as that of the first embodiment is shown by using the same reference numeral as that of the first embodiment.

In the fireproof coating structure 10 according to the second embodiment, each of the connecting portions 14a on both sides between the furring strip 12 and the steel frame column 13 in the fireproof coating layer 14 is the outer surface of the bottom surface portion 12a of the furring strip 12 and the steel frame column. It is provided on a lath 15 spanned between the outer surface and the outer surface of the second side surface portion 13b of 13. If the lath 15 is hung between the furring strip 12 and the steel frame column 13, the lath 15 is provided for each of the outer surface of the bottom surface portion 12a of the furring strip 12 and the outer surface of the second side surface portion 13b of the steel frame column 13. , It may be provided so as to cover the whole or a part thereof.

Examples of the lath 15 include a mesh lath such as a metal lath and a thin steel plate. The thickness of the lath 15 is preferably 0.2 mm or more and 1.0 mm or less, and more preferably around 0.4 mm from the viewpoint of handleability, workability, and cost. Further, when the lath 15 is a thin steel plate, it can be fastened with screws and does not need to be welded, so that it has an advantage of excellent workability.

According to the refractory coating structure 10 according to the second embodiment of the above configuration, since the crossing portion 14a in the fireproof coating layer 14 is provided on the lath 15, the lath 15 is present in the lower layer of the crossing portion 14a. Therefore, better workability can be obtained when forming the connecting portion 14a of the refractory coating layer 14. This effect is particularly remarkable when the distance between the steel frame column 13 forming the hanging portion 14a and the furring strip 12 is wide, specifically, when the distance is 45 mm or more.

Next, the construction method of the refractory coating 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, as shown in FIG. 4A, a structure other than the fireproof coating layer 14 is configured. Specifically, after the steel frame column 13 is erected, a pair of furring strips 12 are provided in front of the steel frame columns 13, and the wall material 11 is attached and fixed using the pair of furring strips 12 as support materials, and the furring strips of the wall material 11 are attached and fixed. A lath 15 is provided between the furring strip 12 and the steel column 13 before or after mounting on the furring strip 12. At this time, a pair of furring strips 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 surfaces of the respective side surface portions 12b are in contact with each other. , The steel column 13 is provided so as to extend along the pair of furring strips 12 at intervals on the side opposite to the wall material 11 side of the furring strip 12, and further, for each of both sides of the furring strip 12 and the steel frame pillar 13. The lath 15 is provided so as to be hung between the outer surface of the bottom surface portion 12a of the furring strip 12 and the outer surface of the second side surface portion 13b of the steel frame column 13.

Then, as shown in FIG. 4B, the furring strip 12 and the steel frame column 13 on the back surface side of the wall material 11 are covered, and the lath 15 is covered at the portion between the furring strip 12 and the steel frame column 13, and the space between them is covered. The fireproof coating structure 10 according to the second embodiment can be obtained by spraying the fireproof coating spraying material 14'to form the fireproof coating layer 14 so as to be spread over.

Other configurations and actions and effects are the same as those in the first embodiment.

(Other embodiments)
In the above-described first and second embodiments, the wall material 11 is used as the face material, but the present invention is not particularly limited to this, and the floor material and the ceiling material may be used as the face material.

In the above-described first and second embodiments, the furring strip 12 is made of channel steel, but the present invention is not particularly limited to this, and other building shaft materials such as H-shaped steel may be used. Further, in the above-described first and second embodiments, the configuration is provided with a pair of furring strips 12, but the present invention is not particularly limited to this, and a single furring strip may be provided.

In the above-described first and second embodiments, the steel column 13 is used as the steel structural material, but the present invention is not particularly limited to this, and the steel beam may be used as the steel structural material.

In the above-described first and second embodiments, the refractory coating layer 14 is composed of a solidified product formed by spraying the refractory coating spraying material 14', but the present invention is not particularly limited thereto, and the refractory coating layer is, for example,. , It may be constructed by a molding plate method using a refractory coating plate of calcium silicate or a winding method using a sheet-shaped refractory coating material such as rock wool.

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

10 Fireproof coating structure 11 Wall material (face material)
12 Furnace 12a Bottom 12b Side 12c Lip 13 Steel column (steel structural material)
13a 1st side surface part 13b 2nd side surface part 14 Fireproof coating layer 14a Hanging part 14'Fireproof coating spray material 15 Lath

Claims (4)

Face material and
A furring strip integrally provided on one side of the face material,
A steel structural material provided so as to extend along the furring strip at intervals on the side opposite to the facing material side of the furring strip.
A fireproof coating layer provided so as to cover the furring strip and the steel frame structural material on one side of the facing material and to extend between the furring strip and the steel frame structural material.
Equipped with
A fireproof coating structure characterized in that a connecting portion between the furring strip and the steel frame structural material in the fireproof coating layer is formed only of a solidified material of the fireproof coating spray material . In the fireproof coating structure according to claim 1,
A fireproof coating structure characterized in that the distance between the furring strip formed by the hanging portion and the steel frame structural material is less than 45 mm. In the fireproof coating structure according to claim 1 or 2 .
A fireproof coating structure characterized in that the surface of the furring strip and the surface of the steel frame structural material overlaid by the fireproof coating layer are on the same plane. The face material, the furring strip integrally provided on one surface of the face material, and the furring strip are provided so as to extend along the furring strip at intervals on the side opposite to the face material side of the furring strip. It is a construction method of a fireproof coating structure equipped with a steel structure material.
A fireproof coating layer is provided by spraying a fireproof coating spraying material so as to cover the furring strip and the steel frame structural material on one side of the face material and to hang between the furring strip and the steel frame structural material . Further, a method for constructing a refractory coating structure , wherein the bridging portion between the furring strip and the steel frame structural material in the refractory coating layer is formed only by a solidified material of the refractory coating spraying material .

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