JPH10147993A - Fireproof structure and construction method for buildings - Google Patents

Abstract

(57) [Summary] [Problem] To provide a fireproof coating method for a building in which a fireproof coating material is provided with sufficient fireproof performance, and a fireproof coating operation can be performed safely and in a short time. A curtain wall (12) is erected on an outdoor side (So) of a beam prior to a fireproof coating operation of the beam (2). Then
An outer wall fireproof board 10 is provided so as to cover an inner surface of the curtain wall 12 other than the window, and a beam material fireproof board 16 is provided in a layer on the outer wall fireproof board. At this time, the refractory board for the beam material covers the outdoor side So of the beam material. Then, rock wool is sprayed to a predetermined thickness on the outer periphery of the beam material indoor side Si to provide the fireproof coating layer 18. When this construction procedure is performed, since the curtain wall is erected first, the work can be performed safely without the need for a safety fence or the like for preventing fall. Further, since the rock wool is sprayed only on the indoor side of the beam material, the rock wool hardly scatters on the curtain wall, and the scattering prevention sheet can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a non-fireproof outer wall,
The present invention relates to a fireproof coating structure and a construction method for a building in which a structural member such as a beam or a pillar disposed near the non-fireproof outer wall is provided with a fireproof coating.

[0002]

2. Description of the Related Art In the Building Standards Law, fire resistance is set for each component of a fire-resistant building. For example, columns and beams are required to have fire resistance of 1 to 3 hours, and curtain walls ( When constructing the outer wall with non-fireproof outer wall), 3
A fire resistance performance of 0 minutes to 1 hour is required for the curtain wall.

[0003] Fig. 5 shows an outer wall constituted by a curtain wall and a fireproof structure of a beam member arranged near the outer wall. In many cases, a beam made of H-shaped steel indicated by reference numeral 2 in the drawing is provided with a refractory coating layer 4 having a predetermined thickness by spraying rock wool on its outer periphery. Further, a fireproof board 10 for an outer wall fixed to the floor slab 6 on the beam 2 via a fixing member 8 is disposed outside the beam 2, and a curtain is provided outside the fireproof board 10 for the outer wall. Wall 12
Is built. Thus, the fireproof coating layer 4 secures the fire resistance of the beam member 2 at the time of fire for a predetermined time, and the fireproof board 10 for the outer wall secures the durability of the curtain wall 12 at the time of fire.

[0004]

By the way, the conventional fireproof covering structure shown in FIG. 5 has a distance between the fireproof board 10 for the outer wall and the beam 2 facing the fireproof board 10 (the area indicated by the symbol A in FIG. 5). Distance) is small, so that when rock wool is sprayed on the beam 2, a sufficient space cannot be secured,
There is a possibility that the spraying operation may be delayed.

Further, in this structure, when the rock wool is sprayed on substantially the entire circumference of the beam material 2, the rock wool may scatter on the curtain wall 12, so that a scattering prevention sheet is required. Therefore, a lot of time and labor are spent in the pre-operation stage.

[0006] Although not shown, the fireproof structure of the outer wall constituted by the curtain wall and the pillar disposed near the outer wall also provides a sufficient space between the pillar and the outer wall fireproof board for blowing rock wool. Since it cannot be ensured, there is a possibility that the spraying operation may be delayed, and since a scattering prevention sheet is required, a lot of time and labor is required in the previous stage of the fireproof covering operation.

Therefore, the present invention has been made in view of the above circumstances, and aims at arranging a fireproof covering material while ensuring sufficient fireproof performance and reducing the work of arranging a scattering prevention sheet and the like. It is an object of the present invention to provide a fire-resistant coating structure and a construction method of a building capable of performing the above.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention provides a non-fire-resistant outer wall and a structural member such as a beam or a column disposed near the non-fire-resistant outer wall. A first refractory plate material covering a surface facing the outdoor side of the structural member, and a second refractory plate material laminated on the first refractory plate material while covering an inner surface of the non-fireproof outer wall other than the window. And a refractory coating layer that covers an outer periphery of the structural member on the indoor side that is not covered with the first refractory plate material.

According to a second aspect of the present invention, there is provided a fire-resistant coating method for a non-fire-resistant outer wall and a structural member such as a beam or a pillar disposed near the non-fire-resistant outer wall, wherein the method is provided outside of the structural member on the outdoor side. Building a non-fireproof outer wall at a position, covering a surface facing the outdoor side of the structural member with a first fireproof material, and covering an inner surface of the non-fireproof outer wall other than the window with a second fireproof material. And a step of disposing a refractory coating layer on the indoor side outer periphery of the structural member that is not covered with the first refractory plate material.

According to a third aspect of the present invention, in the method for refractory coating of a building according to the second aspect, a step of erection of a non-fireproof outer wall at a position outside the building from the structural member is performed. Performing a step of covering the surface facing the outdoor side with a first refractory plate material, and laminating the second refractory plate material on the first refractory plate material while covering an inner surface of the non-fireproof outer wall other than the window, and then, (1) A method of covering a room-side outer periphery of the structural member not covered with a refractory plate material with a refractory coating layer.

[0011] Further, the invention according to claim 4 is based on claim 2.
In the fire-resistant coating method of a building according to the above, before installing the non-fireproof outer wall, performing a step of integrally disposing at least one of the first fireproof plate material and the second fireproof plate material on the nonfireproof outer wall, The non-fireproof outer wall is erected at a position on the outdoor side of the structural member. At the time of the erection, the outdoor side of the structural member is covered with the first fireproof material, and the non-fireproof outer wall is covered with the second fireproof material. This is a method of performing a step of covering an inner side surface other than the window of the refractory outer wall, and then covering a room-side outer periphery of the structural member that is not covered with the first refractory plate material with a refractory coating layer.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those shown in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 shows a curtain wall (non-fireproof outer wall).
1 is a first embodiment showing a fire-resistant coating structure of an outer wall constituted by an outer wall 12 and a beam member (structural member) 2 arranged near a curtain wall 12.

In this embodiment, the outdoor So of the floor slab 6 is
A beam refractory board (first refractory plate) 16 is fixed to the lower side flange 2a of the beam member 2 and the outdoor side So via fixing brackets 14a and 14b.
Accordingly, the outer periphery of the beam member 2 facing the outdoor side So is covered.
An outer wall fireproof board (second fireproof board) 10 is fixed in layers to the beam fireproof board 16, and a curtain wall 12 is built in the outdoor side So of the outer wall fireproof board 10. Here, the fireproof board 10 for the outer wall is used.
Covers the inner surface of the curtain wall 12 other than the window.

On the outer side of the beam 2 not covered with the beam refractory board 16 on the indoor side Si side, a fire-resistant coating layer 18 sprayed with rock wool to a predetermined thickness is provided.
The refractory board 16 for the beam material and the refractory board 10 for the outer wall include asbestos cement perlite board, ceramic calcium silicate board, slate board, pulp cement board, wood wool cement board, wood chip cement board, gypsum board, rock Wool boards and various siding boards are used.

According to the above-described structure, the outdoor side So of the beam member 2 is covered by the fire-resistant board 16 for the beam member and the fire-resistant board 10 for the outer wall, and the indoor side Si of the beam member 2 is covered by the fire-resistant coating layer 18. The fire resistance of the material 2 at the time of fire can be secured for a predetermined time, and the inner wall of the curtain wall 12 other than the window is covered with the fire-resistant board 10 for an outer wall. Can be secured. Therefore, it is possible to provide a fire-resistant coating structure with sufficient fire-resistance performance.

Next, two types of construction procedures (a first construction procedure and a second construction procedure) can be considered as the construction procedure of the fireproof covering structure shown in FIG. The first construction procedure corresponds to the construction method described in claim 3 of the present invention, and the second construction procedure corresponds to the construction method described in claim 4 of the present invention.

First, in the first construction procedure, the beam material 2 is preceded by a fireproof coating operation (a work of spraying rock wool) on the beam material 2.
The curtain wall 12 is erected on the outdoor side So. Next, the outer wall fireproof board 10 is disposed so as to cover the inner surface of the curtain wall 12 other than the window. Next, fixing brackets 14a, 1a, 1b,
The beam refractory board 16 is fixed to 4b to cover the outdoor side So of the beam 2. Finally, rock wool is sprayed to a predetermined thickness on the outer periphery of the room-side Si of the beam material 2 so that the refractory coating layer 1 is formed.
8 is provided.

When the refractory coating structure is constructed according to the first construction procedure, the beam 2 facing the refractory board 10 for the outer wall is formed.
Is covered with the refractory board 16 for the beam material, and there is no place to perform the work of spraying rock wool in a narrow space like the conventional structure shown in FIG. Further, since the rock wool is sprayed only on the room side Si of the beam material 2, the rock wool scattered on the curtain wall 12 is small, and the scatter prevention sheet is light. Therefore, the fireproof covering work can be performed while saving labor and reducing time.

Further, since the curtain wall 12 is built in the outdoor side So of the beam 2 prior to the fireproof covering work of the beam 2, a safety fence or the like for preventing a fall is provided on the outdoor side So of the beam 2.
It is not necessary to provide a fireproof coating, and fireproof covering work can be performed while ensuring work safety.

In the second construction procedure, before the curtain wall 12 is erected, the inner surface of the curtain wall 12 other than the window is covered with a fireproof board 10 for an outer wall. Then
A refractory board 16 for a beam material is laminated on the inner side surface of the refractory board 10 for an outer wall. Next, the curtain wall 12 in which the outer wall refractory board 10 and the beam refractory board 16 are fixed in a stacked state is built in the outdoor side So of the beam 2. On this occasion,
The outdoor side So of the beam 2 is covered by the beam refractory board 16 fixed to the curtain wall 12, and the fixing brackets 14 a, 1, 1, 1 are provided on the floor slab 6 and the lower flange 2 a of the beam 2.
At 4b, the beam refractory board 16 is fixed. Finally, a fireproof coating layer 18 is provided by spraying rock wool to a predetermined thickness on the outer periphery of the beam material 2 on the indoor side Si.

When the fire-resistant covering structure is constructed according to the second construction procedure, the work of arranging the fire-resistant board 10 for the outer wall and the fire-resistant board 16 for the beam material is completed at the same time as the curtain wall 12 is erected. In addition, the refractory coating operation can be performed while shortening the time.

Further, since the curtain wall 12 is erected on the outdoor side So prior to the fire-resistant coating of the beam member 2 on the indoor side Si, a safety fence or the like for preventing a fall is not required, and the operation safety is secured. To perform the refractory coating work.

In the second construction procedure, before the curtain wall 12 was built, the inner surface of the curtain wall 12 other than the window was covered with the fireproof board 10 for the outer wall, and then the curtain wall 12 was built. later,
If the step of covering the outdoor side So of the beam member 2 by arranging the refractory board 16 for the beam member is performed, the lightweight curtain wall 12 can be built in, so that the workability is improved.

Next, FIG. 2 shows a second embodiment showing an outer wall constituted by the curtain wall 12 and a fire-resistant coating structure of a column member (structural member) 20 arranged near the outer wall. This pillar 20 is formed of a square steel pipe.

In this embodiment, a column material refractory board (first refractory plate material) 24 is fixed to the outdoor side So of the column material 20 via fixing brackets 22a and 22b. The outer periphery of the pillar member 20 facing the outdoor side So is covered. The fireproof board for outer wall (second fireproof board) 10 is fixed to the fireproof board for pillar material 24 in a layered manner, and the curtain wall 12 is built in the outdoor side So of the fireproof board for outer wall 10. Here, the outer wall fireproof board 10 covers an inner surface of the curtain wall 12 other than the window.

On the outer periphery of the pillar 20 not covered with the pillar body board 24 on the indoor side Si side, there is provided a fire-resistant coating layer 26 sprayed with rock wool to a predetermined thickness.
According to the above-described structure, the outdoor side So of the column member 20 is covered by the column member fire-resistant board 24 and the outer wall fire-resistant board 10, and the column member 20.
Since the fireproof coating layer 26 covers the indoor side Si, the fire resistance of the pillar 2 in the event of a fire can be ensured for a predetermined time, and the fireproof board 10 for the outer wall covers the inside surface of the curtain wall 12 other than the window. Therefore, the fire resistance of the curtain wall 12 at the time of fire can be ensured for a predetermined time. Therefore, it is possible to provide a fire-resistant coating structure with sufficient fire-resistance performance.

Next, in the construction procedure of the fireproof covering structure shown in FIG. 2, two kinds of construction procedures (a first construction procedure and a second construction procedure) are performed similarly to the fireproof covering structure shown in FIG. Conceivable. That is, in the first construction procedure, the column material 20 is preceded by the refractory coating operation (rock wool spraying operation) of the column material 20.
The curtain wall 12 is erected on the outdoor side So. Next, the outer wall fireproof board 10 is disposed so as to cover the inner surface of the curtain wall 12 other than the window. Next, the pillar refractory board 24 is fixed to the fixing brackets 22a and 22b arranged on the side surfaces of the pillar 20 so as to overlap the outer wall fireproof board 10, and covers the outdoor side So of the pillar 20. Finally, a fireproof coating layer 26 is provided by spraying rock wool to a predetermined thickness on the outer periphery of the interior side Si of the column member 20.
When the refractory coating structure is constructed according to the first construction procedure, there is no place where the work of spraying rock wool is performed in a narrow space as in the first embodiment shown in FIG. Since the amount of rock wool is reduced, the fireproof coating operation can be performed while saving labor and reducing time.

In the second construction procedure, before the curtain wall 12 is built, the inner surface of the curtain wall 12 other than the window is covered with the outer wall fire-resistant board 10. Then
On the inner surface of the outer wall fireproof board 10, a pillar fireproof board 24 is laminated. Next, the curtain wall 12 in which the outer wall fireproof board 10 and the pillar fireproof board 24 are fixed in a stacked state is built in the outdoor So of the pillar 20. At this time, the outdoor side So of the pillar 20 is covered with the pillar fireproof board 24 fixed to the curtain wall 12, and the pillar 2
The column fireproof board 24 is fixed by the fixing brackets 22a and 22b arranged on the side of the "0". Finally, a fireproof coating layer 26 is provided by spraying rock wool to a predetermined thickness on the outer periphery of the interior side Si of the column member 20.

When the refractory coating structure is constructed according to the second construction procedure, similar to the first embodiment shown in FIG.
Since the work of arranging the fireproof board 10 for walls and the fireproof board 24 for pillars is completed simultaneously with the installation of the curtain wall 12, the fireproof covering work can be performed while further reducing labor and time. Since the curtain wall 12 is built in the outdoor side So prior to the fireproofing work of the 20 indoor side Si, a safety fence or the like for preventing a fall is unnecessary, and the fireproof work is performed while ensuring work safety. be able to.

In the second construction procedure, before the curtain wall 12 was built, the inner surface of the curtain wall 12 other than the window was covered with a fireproof board 10 for an outer wall, and then the curtain wall 12 was built. later,
The fireproof board 24 for the pillars is arranged to provide the outdoor So
When the step of covering is performed, the lightweight curtain wall 12 can be built, so that the workability is further improved.

Next, FIGS. 3 and 4 are modifications of the first and second embodiments shown in FIGS. 1 and 2. FIG. According to a modification of the first embodiment shown in FIG.
The outer wall fireproof board (second fireproof board) extending vertically along the curtain wall 12 as a shape larger than the beam fireproof board 16 between the beam fireproof board 16 and the curtain wall 12 covering o. 28 is fixed.

If the vertical dimension L ₁ and thickness of the large outer wall fireproof board 28 are appropriately set so as to withstand expected heating in a fire, the fire resistance of the curtain wall 12 in a fire is further improved. . Furthermore, when the thickness of the refractory board 16 for beams is appropriately set in the same manner as the refractory board 28 for the outer wall, the fire resistance of the beams 2 is improved.

Further, according to a modification of the second embodiment shown in FIG. 4, between the curtain refractory board 24 and the curtain wall 12 covering the outdoor side So of the column 20, the refractory for column is provided. The outer wall fireproof board (the second board) extends horizontally along the curtain wall 12 as a shape larger than the board 24.
(Fireproof board) 30 is fixed.

If the horizontal dimension L ₂ and the thickness of the large outer wall fire-resistant board 30 are appropriately set so as to withstand expected heating in a fire, the fire resistance of the curtain wall 12 in a fire is further improved. . Further, when the thickness of the column fireproof board 24 is appropriately set similarly to the outer wall fireproof board 30, the fire resistance of the column 2 is improved.

In each of the embodiments shown in FIGS. 1 to 4, the refractory coating layers 18 and 26 for covering the outer periphery of the beam member 2 or the pillar member 20 on the indoor side Si are formed by spraying rock wool. The gist of the present invention is not limited to this. For example, the refractory coating layers 18 and 26 are formed by a method of spraying vermiculite or the like, a method of attaching a lightweight fireproof plate, or a method of applying a lightweight mortar or a pearlite mortar. The same operation and effect can be obtained.

In the embodiments shown in FIGS. 1 and 3, the H-shaped steel is described as the beam 2 and in the embodiments shown in FIGS. 2 and 4, the square steel pipe is described as the column 20. However, the gist of the present invention is as follows. The present invention is not limited to this. Even if other steel materials such as I-shaped steel, round steel pipe, and square steel pipe are used as beams and columns, a fire-resistant board is disposed on the outdoor side So side of the beams and columns. The same operation and effect can be obtained as long as it has a structure.

In each embodiment, two fireproof boards are provided between the curtain wall 12 and the beam member 2 or the column member 20, but the gist of the present invention is not limited to this. Rather, as long as the structure includes a fireproof board covering the beam 2 or the column member 20 and a fireproof board covering the curtain wall 12, the same operation and effect can be obtained even with three or more fireproof boards. be able to.

Further, the fireproof boards 10, 28, 3
0, the thickness of the refractory board for beams 16 and the refractory board for columns 24 is appropriately set according to the refractory time.

[0040]

As described above, according to the fire-resistant covering structure for a building according to the first aspect, the outdoor side of the structural member includes the first fire-resistant plate and the second fire-resistant plate laminated on the first fire-resistant plate. Since the structural member is covered with the fireproof coating layer on the indoor side of the structural member, fire resistance of the structural member at the time of fire can be secured for a predetermined time. In addition, since the second refractory plate material covers the inner surface of the non-fireproof outer wall other than the window, fire resistance of the non-fireproof outer wall at the time of fire can be secured for a predetermined time. Therefore,
It is possible to provide a fire-resistant coating structure with sufficient fire-resistance performance.

According to the fire-resistant coating method for a building according to the second aspect, since the outside of the structural member is covered with the first fire-resistant plate material, the fire-resistant material is applied in a narrow work space as in the conventional fire-resistant coating method. There are no places to arrange. For this reason,
Fireproof coating work can be performed while saving labor and reducing time. Here, even if a construction method of spraying a fire-resistant coating material such as rock wool to form a fire-resistant coating layer covering the structural member is performed, since the rock wool is sprayed only on the indoor side of the structural member, the non-fire-resistant outer wall is Fewer rock wool. Therefore, the work can be performed while reducing the number of the scattering prevention sheets.

According to the third aspect of the present invention, the effect of the second aspect can be obtained, and a non-fireproof outer wall is erected outside the structural member before the fireproof coating work of the structural member. Therefore, even if a safety fence or the like for preventing falling is not provided outside the structural member, safety can be sufficiently secured and the fireproof covering operation can be performed.

Further, according to the fourth aspect of the present invention, the effect of the second aspect can be obtained, and before the non-fireproof outer wall is built, the first fireproof plate material and the second fireproof plate material are mounted on the nonfireproof outer wall. If one of them is disposed integrally, the weight can be reduced when the non-fireproof outer wall is built, and the workability can be improved. In addition, if both the first refractory plate material and the second refractory plate material are integrally disposed on the non-fireproof outer wall before the non-fireproof outer wall is built, the covering work and workability can be improved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a main part of a building showing an outer wall constituted by a non-fireproof outer wall according to the present invention and a fireproof covering structure for a beam disposed near the outer wall.

FIG. 2 is a horizontal cross-sectional view of a main part of a building showing an outer wall constituted by a non-fireproof outer wall according to the present invention and a fireproof covering structure for columns arranged near the outer wall.

FIG. 3 is a vertical cross-sectional view of a principal part of a building showing a modification of the fire-resistant coating structure shown in FIG. 1;

4 is a horizontal cross-sectional view of a main part of a building showing a modification of the fire-resistant coating structure shown in FIG. 2;

FIG. 5 is a vertical cross-sectional view of a main part of a building showing a conventional fireproof coating method for an outer wall constituted by a non-fireproof outer wall and a beam disposed near the outer wall.

[Explanation of symbols]

 2 Beam material (structural member) 10 Fireproof board for outer wall (second fireproof plate material) 12 Curtain wall (non-fireproof outer wall) 16 Fireproof board for beam material (first fireproof plate material) 18, 20 Fireproof coating layer 20 Column material (structural member) 24) Fireproof board for pillar material (first fireproof material) 28, 30 Fireproof board for outer wall (second fireproof material) So Outdoor side Si Indoor side

Claims (4)

[Claims] 1. A fire-resistant covering structure for a non-fire-resistant outer wall and a structural member such as a beam or a column disposed near the non-fire-resistant outer wall, wherein a first fire-resistant plate material covers a surface of the structural member facing the outdoor side. When,
While covering the inner surface of the non-fireproof outer wall other than the window, the first
A fire-resistant coating structure for a building, comprising: a second fire-resistant plate material laminated on a fire-resistant plate material; and a fire-resistant coating layer that covers an indoor-side outer periphery of the structural member that is not covered with the first fire-resistant plate material. 2. A fire-resistant coating method for a non-fire-resistant outer wall and a structural member such as a beam or a column disposed near the non-fire-resistant outer wall, wherein the non-fire-resistant outer wall is erected at a position outside the room from the structural member. A step of covering the surface facing the outdoor side of the structural member with a first refractory plate, a step of covering an inner surface of the non-fireproof outer wall other than the window with a second refractory plate, and a step of covering the first refractory plate with Disposing a fire-resistant coating layer on the uncovered interior side of the structural member on the indoor side of the building. 3. A step of erecting a non-fireproof outer wall at a position on the outdoor side of the structural member, then covering a surface facing the outdoor side of the structural member with a first refractory plate material, and Performing a step of laminating the first refractory plate material while covering an inner surface of the non-fireproof outer wall other than the window, and then performing the first
The method according to claim 2, wherein a step of covering a room-side outer periphery of the structural member that is not covered with a refractory plate material with a refractory coating layer is performed. 4. A step of integrally disposing at least one of the first refractory plate and the second refractory plate on the non-refractory outer wall before erection of the non-refractory outer wall. It is built at a position outside the building from the structural member, and at the time of building, the outside of the structural member is covered with the first fire-resistant plate, and the second fire-resistant plate is used to cover other than the window of the non-fireproof outer wall. 3. The building according to claim 2, wherein a step of covering an inner side surface of the structural member is performed, and then, a step of covering a room-side outer periphery of the structural member that is not covered with the first refractory plate material with a fireproof covering layer. 4. Refractory coating method.