JPH07116771B2 - Steel frame vibration isolation fireproof coating method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a steel frame fireproof coating method.

[Conventional technology]

For the fireproof coating of steel frames, a wet fireproof coating method is used in which mortar mixed with non-combustible fibers such as rock wool is sprayed for fireproof coating, and a fireproof coating material such as precast concrete is attached around the steel frames for fireproof coating. There is a dry fireproof coating method.

[Problems to be Solved by the Invention]

The former requires not only a spraying machine, but also skill on site for mortar mixing and uniform spraying, and it takes time and effort for construction, and the impact of mortar scattering on the human body. There was a problem of polluting the surroundings.

In the latter, the fireproof heat insulating molded plate produced in the factory,
A construction method is known in which a fireproof coating is applied while assembling at a construction site. This construction method does not have the above-mentioned problems, and the construction can be significantly simplified. A large amount of adhesive is required, and this molded plate is dense and the weight of each molded plate is heavy at the time of assembly, so it takes time to connect and the weight of the entire building becomes heavy, which requires a large amount of foundation work. And costly. In addition, for super-high-rise buildings, there is a demand for reducing the weight of fire-resistant coating materials for steel-frame fire-resistant coating methods using a flexible structure.
Furthermore, since the molded plate is fixed by tapping etc.,
There are problems to be solved, such as shaking of structural materials and easy damage / falloff from vibrations such as earthquakes.

[Means for Solving the Problems]

The present inventors, in order to solve the problems of the conventional method described above,
The present invention has been made as a result of earnest studies, that is, the present invention is a U-shape or L-shape in which a corner portion of a steel frame is abutted via a filler when the steel frame column, the steel beam, etc. are fire-resistant coated with a fire-resistant heat-insulating plate.
This is a steel frame vibration-isolating fireproof coating method characterized in that a fireproof heat insulating plate is adhered to a mold spacer.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings illustrating an embodiment of the present invention.

FIGS. 1 (a) and 1 (b) show a case where a column or beam having a steel frame structure made of H-shaped steel is subjected to a vibration-isolating fireproof coating by the method of the present invention.

2 and 3 show a case in which a pillar or a beam made of square steel is provided with a vibration-isolating fireproof coating by the method of the present invention.

In the present invention, the steel frame fireproof coated plate refers to the one in which a fireproof heat insulating plate and an inorganic fiber heat insulating material are adhered or used together.

The refractory heat insulating plate means a conventionally used one such as a calcium silicate plate and a gypsum board.

The inorganic fiber heat insulating material refers to conventionally known rock wool, glass wool, ceramic fiber and the like.

In the figure, 1 is a steel frame, 2 is a corner of the steel frame, 3 is a filler, 4
Is a spacer, 5 is a fireproof heat insulating plate, and 6 is a mat-like, felt-like or board-like inorganic fiber heat insulating material.

When the pillars and beams requiring fireproof coating have a steel frame structure made of H-shaped steel, as shown in FIG. 1, the corner portion 2 of the steel frame 1 has a U-shaped spacer 4 abutting against the corner portion 2. Are bonded via the filler 3. The filler 3 also serves as a cushion for bonding the spacer 4 to the steel frame 1 and at the same time preventing damage to the spacer 4 and the like due to vibration such as an earthquake. Moreover, as the filler 3 used here,
Since the heat from the outside is almost shut off by the fireproof heat insulating plate 5, the inorganic fiber heat insulating material 6, and the spacer 4,
It does not have to have particularly high heat resistance.

As this filler, caulking conventionally used,
The putty material, the rubber-based adhesive material, the elastic rubber, the foamed plastics, etc. are not limited as long as the spacer 4 can be bonded, but when longer fire resistance time is required. It is more preferable to use this filler in combination with an inorganic fiber, and as the inorganic fiber, a buffer material such as rock wool, glass wool, ceramic wool or the like having fire resistance is preferable.

This spacer 4 is a means for fixing the fireproof heat insulating plate 5 to the steel frame 1, and also serves as a cushion for preventing heat from the outside of the fireproof heat insulating plate 5 from being directly transferred from the joint portion to the steel frame 1. .

Therefore, the spacer 4 is not particularly limited, but examples thereof include joiners such as wood, resin, ceramics, aluminum, and steel. Wood is preferable because it can be easily manufactured by hollowing out the central portion, has a certain level of fire resistance, and is inexpensive. For resin, ceramics, aluminum, steel, etc. joiners, use molds, injection,
It can be molded by drawing, extrusion molding or the like.

In particular, the metal-based joiner is effective in the construction method shown in FIG.

The length of the spacer 4 is not particularly limited.

As shown in FIG. 1 (a), the fireproof heat insulating plate 5 can also have a mat-like or board-like inorganic fiber heat insulating material 6 fixed to the pillar surface or the fireproof heat insulating plate at the construction site with an adhesive or the like. However, in order to perform the construction easily, it is still preferable to use the one in which both are integrated.

Further, as another method for attaching the inorganic fiber heat insulating material 6, as shown in FIG. 1 (b), a flat surface portion (upper side of the drawing)
For this, the one bonded to the fireproof heat insulating plate as described above is used, and the inorganic fiber heat insulating material 6'can be directly attached to the steel frame on the side surface.

The fire-resistant heat-insulating plate 5 is not particularly limited as long as it has a heat-resistant heat-insulating property such as a conventionally used calcium silicate-based molding plate, gypsum-based board, stainless steel, or decorative steel plate.

As the matte or board-like inorganic fiber 6 fixed to the fireproof heat insulating plate 5, there are glass wool, rock wool, steel wool, ceramic wool and the like, but in order to exert sufficient fireproof performance, a fireproof coated plate Since it becomes thicker, it is preferable to fill the space with rock wool in order to avoid a reduction in living space. This mat-shaped or board-shaped inorganic fiber 6 may be fixed to the same size as the fireproof heat insulating plate 5 and cut to a predetermined size at the construction site, but in order to carry out the construction more easily It is preferable to fix the one that is cut in advance according to the distance between the spacers 4 or the distance between the corners 2 of the steel frame 1.

As the method for fixing the fireproof heat insulating plate 5 and the inorganic fibers 6 and the adhesive, those known in the art can be used.

Next, a method of fixing the fireproof heat insulating plate 5 to the spacer 4 will be described.

When the spacer 4 made of wood, resin, ceramics or metal (iron, aluminum, etc.) is used, conventionally known screws, nails, staples, etc. can be used.

The surface of the fixed fire-resistant heat insulating plate 5 can be improved in appearance by applying a decorative material or applying a paint, if necessary.

FIG. 2 is an application of the construction method described in FIG. 1 to a pillar or beam made of square timber.

FIG. 3 shows a substitute for the insulating material 6 made of inorganic fiber, which is entirely covered, instead of the filling material 3. The insulating material 6 made of inorganic fiber serves as a cushion and a heat insulating material that absorbs vibrations such as earthquakes. In this case, the L-shaped spacer 4 creates a space between the inorganic fiber heat insulating material 6 and the fireproof heat insulating plate 5 to achieve further fireproof coating.

When covering the entire steel frame 1 with the inorganic fiber heat insulating material 6, it is of course possible to use the filler 3 together.

〔Example〕

Example 1 Wooden spacers are bonded to both ends and the center of a beam made of H-shaped steel having the structure shown in FIG. 1 through a filler made of caulking material, and the spacer has a thickness of 7 m.
A fireproof heat insulating material (FG board manufactured by Asano Slate Co., Ltd.) of m with a thickness of 25 mm and a rock wool board of 40 kg / m ³ density (Samboard manufactured by Nippon Steel Chemical Co., Ltd.) was attached and integrated.
A fireproof coating was carried out by fixing with staples.

This product was subjected to a heating test by the fire resistance test method stipulated in Ministry of Construction Notification No. 2999, and as a result of measuring the temperature at 9 places, the time when the internal steel frame reached the average temperature of 350 ° C was the standard of the fireproof coating. The value was 1 hour, which was 70 minutes, which far exceeded the fireproof structure. At this time, the maximum temperature of 450 ° C was 90 minutes.

Examples 2 to 8 In the structure shown in FIG. 2, the same heating test as in Example 1 was performed except that the combination of the fireproof heat insulating plate, the inorganic fiber heat insulating material, the spacer and the filler (combined with the inorganic fiber) was used. . The results are shown in Table 1.

[Effects of the Invention] According to the fireproof coating method of the present invention, although the construction method is simpler than the conventional method, the steel frame fireproof coating material is thin and the living space is wide, and it is lightweight for super high-rise buildings. In addition, it is possible to reduce the cost of foundation work and steel frame members, and to provide fireproof coating that satisfies the standards.

[Brief description of drawings]

1 (a) and 1 (b) are sectional views showing an embodiment in which the present invention is applied to a pillar or a beam, and FIG. 2 is a sectional view of an embodiment applied to a pillar or a beam made of square timber, and a third embodiment. The drawing is a cross-sectional view showing another embodiment of FIG. 1 ... steel frame, 3 ... filler, 4 ... spacer, 5 ... fireproof heat insulating plate,

Claims (2)

[Claims] 1. U-shaped or L-shaped spacers are adhered to each corner of a steel frame through a filler for fire-resistant coating of a steel column, a steel beam or the like with a fire-resistant and heat-insulating plate, and the spacer is attached to the spacer. ,
A vibration-isolated fireproof coating method for steel frames, characterized by fixing a fireproof heat insulating plate. 2. When a steel column, a steel beam or the like is fireproof coated with a fireproof and heat-insulating plate-like body, felt-like, mat-like or board-like inorganic fibers are attached to the steel frame, and an L-shaped inorganic fiber is formed on the surface of the inorganic fibers. A vibration-isolating fireproof coating method for steel frames, which comprises bonding a spacer and fixing a fireproof heat insulating plate to the spacer.