JPS63210331A - Refractory covering construction method of reinforcing bar structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a fireproof coating method for steel structures using decoratively finished rock wool boards as coating materials.
The surface of a non-flammable rock wool board that does not contain carcinogenic substances is given a decorative finish, cutouts are made on the back side to form corners, and the steel structure is bent at the construction site to fit the steel structure. This invention relates to a fireproof covering method for steel structures that provides good appearance.

2. Description of the Related Art Conventional Techniques and Problems Conventionally, there has been a method for coating steel structures with fireproofing by spraying fireproofing materials.

With this method, fireproof materials would scatter inside and outside the building during construction, making it dirty, creating a poor working environment, and causing the steel frame to oxidize and rust.

In addition, as another construction method, as described in JP-A No. 60-184146, an exterior plate is placed around the steel frame, and a room-temperature foam-hardening composition mainly composed of inorganic substances is injected into the exterior plate. There is a hardening method, but it requires on-site injection work, which makes the construction process complicated, and the drawback is that it increases the size of the equipment and increases costs.

Furthermore, as one of the general construction methods, fireproof covering boards mainly composed of asbestos are cut on site to match the steel beams and columns, and after the installation framework is installed on the base, the cut fireproof covering boards are individually cut. There was also a method of fixing using a combination of noncombustible adhesive and nails, screws, etc.

However, the construction method of attaching fireproof cladding, which is mainly composed of asbestos, to the steel frame requires a lot of cutting work on site, which is difficult to work with, and because asbestos is a carcinogen, there is a risk of health problems. Cracks tend to occur later on, and asbestos is exposed on the surface, causing environmental pollution.

Furthermore, a large amount of harmful dust is generated during the demolition and disposal of buildings using this material, which has become a social problem.

In view of the above-mentioned problems, the present invention uses Rockwool board, which does not pose any health problems, as the main material, gives it a decorative finish, and also processes the bent parts in advance at a factory. We provide a fire-resistant coating method for steel structures that eliminates the troublesome cutting work carried out on-site and shortens the construction period to a fraction of the time required by human labor. The structure is such that the surface of a rock wool board 1 is smoothed and a decorative sheet material 2 made of Kanreisho 2a or cloth and decorative paper 2b is attached to form a rock wool decorative board 3. A notch 4 for forming a corner is provided on the back surface of the plate, and the rock wool decorative board 3 is bent to fit the steel frame structure 5 and the steel frame structure 5 is covered with the notch 4.

2. Examples Hereinafter, several examples of the fireproof coating method of the present invention will be explained in detail based on the drawings.

The coating material used in the present invention is mainly made of rock wool, which is made by adding crushed stone, limestone, etc. to iron slag, nickel slag, manganese slag, etc. to adjust the composition, and may include some inorganic materials (excluding asbestos). ) is hardened with cement, and the physical performance of the rock wool board 1 is as follows:
It is assumed that the following JIS standards have been passed.

Bulk specific gravity 0.45 or more Thermal conductivity 0,08 K cal / m
h”C bending strength 4 K g f/c
rrr' The surface of this rock wool board 1 is processed to be smooth with a sander, etc., and this rock wool board 1 is pasted with a decorative sheet material 2 in a bag leaving the back side as shown in Figure 2.3 to form a rock wool makeup. Form plate 3.

As the decorative sheet material 2, a combination of Kanreisho 2a and decorative paper 2b is suitable, but fabric such as glass cloth and decorative paper 2a are suitable.
It may also be used in combination with

In addition, a gypsum board is pasted on the surface of the rock wool board 1, or 1 mm to 5 nn of gypsum or a mixture of gypsum and an inorganic material is pasted on the surface of the rock wool board 1.
It is also possible to form a rock wool decorative board 3 by coating the rock wool to a thickness of approximately m and applying the decorative sheet material 2 in a bag over this.

Next, a notch 4 for forming a corner is provided on the back surface of the Lollafral decorative board 3. As shown in FIG. 4, this notch 4 is desirably V-shaped or a shape similar to this.

In addition, this notch 4 is formed by bending the rock wool decorative board 3 to fit the steel structure 5 and forming one or more rock wool decorative boards 3 into a U-shape, square or other polygonal shape.
provided in number and at intervals necessary to cover the
Moreover, the inside is filled with a fireproof adhesive 4a for adhering to the inner surface of the notch.

FIG. 1 shows a first example of a beam in which the steel structure 5 is made of H-beam steel. A rock wool decorative board 3 bent into a U-shape is fixed with screws 7 through two notches 4.

FIG. 5 shows a second example in which the steel frame structure 5 is made of a beam made of H-shaped steel like the first example, and the flange portion 5a of the steel structure 5 is
A waste board 8 was inserted into the space between the parts, and a rock wool decorative board 3 bent into a U-shape was attached to the waste board 8 through the two notches 4 using nonflammable adhesive and nails 9. It is something.

FIG. 6 shows a third example of a column in which the steel frame structure 5 is made of H-beam steel. A base runner stud lO is erected on the rectangular circumferential surface of the steel frame structure 5, and two
Two rock wool decorative boards 3.3 bent into a U-shape are fixed together with screws 7 through two notches 4.

FIG. 7 shows the implementation f! of a column in which the steel structure 5 is made of H-beam steel as in the third implementation example. In the fourth example, a substantially rectangular base runner stud 11 is erected around the steel structure 5, and four pieces of rock wool are bent into a chevron shape through two notches on the outside of the base runner stud 11. Fig. 8 shows a 55th example of a column in which the steel structure 5 is made of cylindrical steel, and a hexagonal base runner stud 12 is attached to the periphery of the steel structure 5. is erected, and two rock wool decorative boards 3.3 bent into a semi-angular shape are fixed to the outside of the base runner stud 12 with screws 7.

It should be noted that the above embodiments show typical examples of covering the steel structure 5 with the rock wool decorative board 3, and are by no means a restrictive list.

For example, it naturally includes cases where the coating is hexagonal.
Furthermore, one piece of rock wool decorative board 3 can cover one piece of steel frame structure 5.

Effects of the Invention As described above, the fireproof coating method for steel structures according to the present invention uses Rockwool board 1, which does not contain carcinogens, as the main material, so there is no risk of health problems, and Since notches 4 for corner formation are provided in advance and a rock wool decorative board 3 with a decorative finish is used, the construction work on site is extremely easy and the construction period can be greatly shortened. The finishing accuracy will also be uniform and good.

Furthermore, the work environment is not degraded and cracking does not occur, and since there are no seams in some corners, the occurrence of cracks can be prevented, and the fire resistance performance is further improved.

Furthermore, since the rock wool decorative board 3 is made by adhering and covering the decorative sheet material 2 to the rock wool board 1 whose surface has been processed to be smooth, the surface can be finished smoothly even during final finishing such as painting.

Furthermore, the generation of harmful dust can be prevented even when a building is demolished.

Incidentally, the rock wool decorative board 3 according to the present invention can be used not only as a fireproof coating material but also as an interior material such as a wall material or a partition material.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the first example of the fireproof coating method for steel structures according to the present invention, Fig. 2 is a perspective view of a decoratively finished rock wool decorative board 3, and Fig. 3 is an enlarged partial view of the Ronfleur decorative board 30. 4 is a sectional view of a rock wool decorative board 3 with a cutout 4, and FIGS. 5 to 8 are sectional views of second to fifth examples of implementation of one fireproof coating method for a steel structure according to the present invention. It is. Main symbol 1 fist in the diagram...rock wool board? ... Decorative sheet material 3 ... Rock wool decorative board 4 ... Notch 5 ... Steel structure patent applicant Satoshi Okawa Figure 1 Shiro... 7 Lee Shi #''
Boshomi, Dimensions: Figure 5, Figure 957, Figure 6, Figure 8, hand-printed handbook (self-produced), 1985. , A day

Claims (1)

[Claims] A rock wool decorative board 3 is formed by smoothing the surface of a rock wool board 1 and pasting a decorative sheet material 2 made of cold paper 2a or cloth and decorative paper 2b, etc., to form a rock wool decorative board 3. A steel frame characterized in that a notch 4 for forming a corner is provided on the back surface of the decorative board 3, and the rock wool decorative board 3 is bent at the notch 4 to fit the steel structure 5, and the steel structure 5 is covered. Fireproof coating method for structures.