JPH0610425A - Method of fireproofing coating - Google Patents

Abstract

PURPOSE:To make a substantial amount of the workload of fireproofing on site savable and simplify the processes of fireproofing as a whole. CONSTITUTION:In a method for providing fireproofing to a building structure comprising column materials having a steel member 2, the outside surface of the steel member 2 is covered with fireproofing materials 7, 8, 9 in advance and the covered steel member is erected on a construction site. Part (column member) of the column materials comprises fireproofing material and the covered steel member is connected to each of the column members to construct a column.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof coating method for a building structure including steel members such as steel columns and beams.

[0002]

2. Description of the Related Art As a fireproof coating method for a building structure including steel members such as steel columns and beams, a steel member outside a building is protected by an outer wall, and a steel member inside a building is fire-protected. A synthetic fireproof coating method is known.

Conventionally, in this type of fireproof coating method,
Generally, after constructing a steel frame, an outer wall is attached, then a cement-based refractory material is applied to the steel frame member inside the building, a refractory material such as rock wool is sprayed, or a refractory sheet is wound. However, in such a construction method, since the fireproof coating is performed only on the site where the scaffolding is poor, workability and construction accuracy are unavoidably deteriorated, and when spraying refractory materials, take appropriate environmental measures. There was also a problem in terms of work environment at difficult sites.

On the other hand, in order to solve the above-mentioned problems, the applicant has previously applied a fireproof coating to the surface of the steel columns, steel beams, etc. excluding the joints (ends), and constructed the steel columns, steel beams, etc. After that, a fireproof coating method for adhering a fireproof sheet to the joint portion has been proposed (see Japanese Patent Application Laid-Open No. 1-210544). However, in this method, a steel frame column, a steel beam or the like having a complicated shape is almost formed. Since it is necessary to cover the entire circumference with fireproof, the coating process is troublesome, and the work for providing a sufficient fireproof protection effect to the bonded portion of the fireproof sheet in the joint portion has not always been easy.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is not only to significantly reduce the amount of work for fireproof coating on site, but also to simplify the process as a whole fireproof coating method. It is to provide an improved fireproof coating method.

[0006]

SUMMARY OF THE INVENTION The present invention provides a fireproof coating method for a building structure comprising a pillar material provided with a steel frame member such as a steel column or a steel beam, in which the outer surface of the steel frame member is previously coated with a fireproof material. And then at the construction site, the fire-resistant coated steel member is assembled, and a part of the strut material (“strut member”) is made of refractory material, and the strut is made of the fire-resistant coated steel member and the refractory material. The fire resistant coating method is characterized in that a pillar member is constructed by joining members.

The present invention will be described in detail with reference to the drawings.

Steel frame members such as steel frame columns and steel beam beams which are fireproof coated according to the present invention include steel frame members conventionally used in steel frame building structures such as I type steel, H type steel, T type steel, square steel and groove type steel. Be done.

According to the present invention, the refractory coating is applied to the outer surface of the steel frame member prior to erection of the steel frame member.
As shown in FIGS. 1 and 2, the outer surface means the surface of the steel frame member 2 facing the outer side of a pillar material such as a pillar material or a beam material to be constructed. At this time, the reinforcing bars 3 and the laths 4 are attached to the steel frame member 2 by welding or the like before the fireproof coating. The position, range, etc. of fireproof coating in advance include the shape of each steel frame member, the shape of the entire strut material including the steel frame member,
It is selected as appropriate in consideration of the required degree of fire resistance and workability.

For the refractory coating on the outer surface of the steel frame member according to the present invention, an appropriate construction method such as coating, spraying or sticking a refractory material can be adopted. Such covering work can be carried out in a work yard, a work yard at a construction site, etc., so that the quality of the scaffolding for work does not pose a problem, and the work environment can be improved even when spraying. Maintenance is easy and can be done efficiently and safely.

As the refractory material that can be used in the present invention, a cement refractory material or a ceramic refractory material such as alumina, magnesia, zirconia or silicon carbide can be used. It is preferable to use a ceramic-based refractory material (for example, Sertaika No. 2 manufactured by SK Kaken Co., Ltd.), which has excellent adhesive strength and water resistance.

Here, the construction method of the present invention will be described in detail with reference to FIGS. 1 and 2. First, in FIG. 1, the outer surface of the steel frame member 2 to which the reinforcing bars 3 and the laths 4 are attached is previously formed. The refractory material 7 is coated. On the other hand, at the construction site, after the coated steel member 2 has been built, the outer wall 1
Assemble. After that, the outer wall 1 and the backing material 6 are joined with an adhesive or the like. In this case, before the outer wall 1 is assembled, a refractory material 8 forming a part (support member) of the support member is attached to a predetermined position inside the outer wall 1 in advance. Next, the reinforcing bars 3 and laths 4 extending from the steel frame member 2 and the reinforcing bars 3 and laths 4 extending from the backing material 6 are fastened with the binding material 5. After that, the coated steel frame member 2 and the refractory material 8 are joined with the refractory material 9 to construct a column. In this case, the joining with the refractory material 9 is performed by coating or spraying. Also, refractory material 8
Instead of pre-installing the outer wall 1 before assembling, the outer wall 1 can be assembled with the refractory material 9 after assembling, and as an implementation method, the outer wall 1 and the outer wall 1 can be integrally molded according to the work procedure. Alternatively, an appropriate method such as coating or pasting on the outer wall 1 can be selected.

Next, the method of constructing the beam of FIG. 2 can be carried out in the same procedure as in FIG. That is, rebar 3 and lath 4
The outer surface of the steel member 2 to which is attached is covered with a refractory material 7. Then, at the construction site, the coated steel member 2 is erected and the outer wall 1 is assembled. Then rebar 3 and lath 4
After they are tightly bound, the beam is constructed by joining with the refractory material 9.

Although FIGS. 1 and 2 show the case where the joint portion made of the refractory material 9 is outside the steel frame member 2, the joint portion may be provided in the middle of the steel frame member 2 in some cases.

[0015]

The present invention has the above-mentioned structure and has the following effects. In other words, the fireproof coating work to be performed after constructing the steel frame is only the steel frame joints and, in some cases, only the joints with the outer wall, the work volume of fireproof coating on site is greatly reduced, and the work efficiency of fireproof coating is remarkably high. It can be improved and the construction period can be shortened significantly.

[0016] Since the fireproof coating construction at a site with poor scaffolding can be simplified, the construction accuracy can be improved, and the danger associated with the fireproof coating work can be considerably avoided.

The amount of fireproof coating work at the site where it is difficult to take environmental measures is reduced, and the work environment is easily maintained.

Since it is possible to reduce the number of fireproof coating portions on the steel frame member having a complicated shape, the fireproof coating performed in advance becomes simple.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view of a pillar constructed according to the present invention.

FIG. 2 is a vertical sectional view of a beam constructed according to the present invention.

[Explanation of symbols]

 1 Outer wall 2 Steel member 3 Reinforcing bar 4 Las 5 Bonding material 6 Lining material 7 Fireproof material 8 Fireproof material 9 Fireproof material 10 Floorboard

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hitoshi Kurioka 2-19-1 Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Keiichi Miyamoto 2-19-1 Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Center

Claims (1)

[Claims] 1. A fireproof coating method for a building structure comprising a pillar material provided with a steel frame member such as a steel column or a steel beam, in which the outer surface of the steel frame member is previously coated with a fireproof material, and then at the construction site, While assembling the fire-resistant coated steel member, a part of the strut material (strut member) is made of refractory material, and the strut material is joined by joining the fire-resistant coated steel member and the strut member made of the refractory material. A fireproof coating method characterized by being constructed.