JPH01310040A - Structure where steel frame is covered with fireproof material - 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 This invention relates to an improvement in a fire-resistant covering structure for covering the steel frame of a building with a fire-resistant material.

Conventional technology Traditionally, structures were used to cover steel frames such as beams and columns of buildings with fireproof materials, and were prepared by mixing rock wool as the main material with a portland cement binder and a water-soluble powder organic glue. A dry type fireproof coating structure in which the refractory material is sprayed on the steel surface along with water, or a wet type fireproof coating structure in which a fireproof material made into a viscous paste of rock wool, Portland cement, and water is pumped and sprayed with a spray can. Alternatively, a fireproof coating structure using molded plates such as asbestos calcium silicate plates is applied using a combination of adhesive and nails.

However, the dry and wet spraying methods described above have the following drawbacks when it comes to fireproof coating structures.

(b) The work environment is bad because of the dust, and other workers cannot work at the same time.

(b) Because there is a lot of dust, it is necessary to surround the work area with a sheet when spraying to prevent the dust from getting outside, and also to spread sheets to prevent the floors and walls from getting dirty.

(c) Since water is used, the page spacing is 1 pm until the coating material hardens.
A curing period of 2 months is required for ketsu and cleavage.

(d) Since the work is done on-site, the surface finish depends on the skill of the worker, and the surface quality is generally poor.

(n) Spraying requires special techniques and skill.

(f) Due to on-site work, the thickness and density of the coating layer is uneven.

(g) Spraying requires a special machine.

On the other hand, in the wave crest structure using formed plates, the fireproof coating material is a hard formed plate, so it is difficult to apply the coating to curved surfaces of steel frames, bent parts, and areas with complex shapes such as around piping. , and for cutting to match the shape and dimensions of the steel frame.
It requires special cutting tools such as diamond saws and circular saws, and the cutting process requires a lot of effort.
It has many inconvenient problems, such as very poor workability and the generation of a large amount of dust that is harmful to the health of workers when cutting the molded plates.

10 Problems to be Solved by the Invention The present invention has been made in order to eliminate all the disadvantages of the above-mentioned dry and wet spraying for fireproof coating structures and the pasting of molded plates for fireproof coating structures. The main objective is to provide a fireproof covering structure for steel frames that generates almost no dust compared to other structures, does not require skilled construction techniques, and can significantly shorten the construction period. be.

, Means for Solving the Problems The fireproof coating structure for steel frames according to the present invention has flexibility and flexibility by mainly using inorganic fibers as a fireproof coating material to cover the steel frames, and can be used to cover steel frames with one piece. This felt material is covered with a latching member such as a welded bottle or stud bolt, and the felt material is attached to the tip of the latching member. It is characterized by the fact that it is prevented from coming off.

As the inorganic fiber, rock wool, glass fiber, asbestos, ceramic fiber, etc. are used.

The above-mentioned latching member can be a bottle or a stud bolt, and after inserting the felt material into it, firmly fit a washer in the case of a bottle, or screw the washer in the case of a bolt to prevent the felt material from coming off. It can be stopped. Other means may be adopted as appropriate for this prevention.

9. Effects and Examples Hereinafter, the structure of the present invention will be explained in detail together with its effects with reference to the drawings.

In the drawings, Fig. 1 shows a fireproof covering material mainly made of inorganic fibers, which has flexibility and flexibility, and can be used to cover the surroundings of a steel frame with just one piece. Felt material 1 having sufficient length to cover
This figure shows an example in which the H-shaped beam is directly attached to the steel frame 2.

Figures 2 and 3 show a single fer h having a length sufficient to cover the steel frame 2 with the same material as described above.
4', when covering t1, a latching member 3 such as a bottle or a stud bolt is fixed to the steel frame by welding means, and a washer 4 is firmly fitted to the tip of the latching member 3 to prevent the felt material 1 from coming off. This is what is shown.

FIG. 4 shows that the latch member is fixed to the steel frame 2 in the same manner as above,
This shows an example in which a reinforcing lath 5 is inserted and fixed by welding, and the above-mentioned felt material 1 is inserted into a latching member protruding from the lath to prevent it from coming off and cover it. 6 is the slab of the building.

As mentioned above, as the fireproof covering material, a felt material made mainly of inorganic fibers, which has flexibility and flexibility, and has a length sufficient to cover the surrounding steel frame with one piece, is used.
The following effects can be obtained by inserting it into a latching member pre-fixed to the steel frame and covering the steel frame.

(1) The felt material made mainly of inorganic fibers has excellent performance as a fireproof covering material for steel frames.

(2) The felt material does not require a special cutting tool and can be cut with a simple cutting tool such as a knife, kitchen knife, or scissors.

(3) Since the felt material does not generate dust during cutting, there is no risk of harming the health of the worker.

(4) The felt material has appropriate softness and flexibility, so it can be bent up to 360 degrees, and it is easy to process the creases by machine, so the ends of the steel frame , corners, curved surfaces, bent portions, around piping, etc. can be integrally coated without gaps, making it possible to form a complete fireproof and heat-insulating coating.

(5) The felt material has a higher sound absorption coefficient than a hard molded plate, and is effective in absorbing noise and vibration generated within a building.

(6) When a decorative felt material is used as the felt material, the decorative work after the fireproof coating can be omitted.

(7) By using the felt material, as mentioned above, it is easy to cut and can be easily applied to cover the steel frame.
The workability of fireproof coating construction can be greatly improved. Further, in the case of felt material, it is possible to use a long rolled material, which not only contributes to improved workability but also suppresses loss of covering material due to cutting off.

(8) Since the felt material is lightweight, even if it is coated on a steel frame such as a beam or column, the load imposed on the steel frame is small.

(9) The felt material can be simply inserted in a skewer shape into a bottle or stud bolt fixed to a steel frame surface by welding, so the covering operation is extremely simple.

(lO) In the case of the felt material, the strength of the covering material can be easily increased by subjecting it to needling processing.

(11) The felt material has flexibility and flexibility,
In addition, since it is long enough to cover the circumference of the steel frame with one piece, the felt material can be applied to the shape of the steel frame.It has shape-following properties for deformed steel frames and can be completely covered. It is also easy to overlap both ends, and due to these characteristics, there is no joint between the ends, and by fixing the overlapping part with a bottle, etc., the intrusion of heat and flame can be reliably prevented. Therefore, there is no risk of a decrease in fire resistance.In addition, since the steel frame can be covered without any joints, there will be no joint opening due to shrinkage of the felt material or expansion of the steel frame when exposed to heat. Therefore, the fire resistance is complete and certain.

Effects of the Invention As is clear from the above explanation, according to the present invention, the fireproof covering material covering the steel frame has flexibility and flexibility by being formed mainly of non-411 fibers, and can be used to cover the steel frame with one piece. Use felt material that is long enough to cover the circumference of the steel frame, and fix the felt material to the steel frame using a bottle or star
A latching member such as a sod bolt is made by welding,
Next, felt material is applied to the tip of the latching member to prevent it from falling out, so conventional spraying eliminates all the problems of fire-resistant coating structures, or pasting molded plates solves all the problems of fire-resistant coating structures, maintaining and ensuring fire-resistant performance. It can greatly contribute to the field of construction technology for fireproof coating materials for steel frames.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the steel frame covering part showing the state in which refractory material is directly attached to the steel frame, Figures 2 and 3 are cross-sectional views of the main part of the steel frame covering showing the state of felt material being covered by the latching member, 4
The figure is a cross-sectional view of a steel frame covering part showing a state in which fireproofing material is attached to the steel frame in a box shape. 1... Felt material, 2... Steel frame, 3... Latching member, 4... Washer, 5... Lath, 6... Slab first
Figures and Figures 2, 4, and 3

Claims (1)

[Claims] As a fireproof covering material to cover the steel frame, a felt material made mainly of inorganic fibers, which has flexibility and flexibility, and is long enough to cover the surrounding steel frame with one piece, is used.
This felt material is a fireproof material that uses a steel frame as a refractory material, which is covered with a latching member such as a welded pin or stud bolt, and the felt material is prevented from coming off at the tip of the latching member. Structure covered with.