JPH076312U - Fireproof coating structure of steel column - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a fireproof coating structure of a steel-framed round column that can be constructed without requiring welding work. [Structure] In a fire-resistant coating structure of a steel-framed round pillar that covers a circumference of a steel-framed round pillar 1 that constitutes a frame of a building with a cylindrical fire-resistant covering portion with a clearance, the cylindrical fire-resistant covering portion is formed from an arc-shaped fire-resistant covering material 3a. Assembled so that the longitudinal seams are aligned, and in the circumferential gap between the steel round column and the cylindrical refractory covering, a lightweight groove is formed along the longitudinal seam of the cylindrical refractory covering. A section steel 5 is installed, and the lightweight groove section steel is fixed to a concrete floor surface 6 of a building in a standing state by applying a fastener 7 at a lower end thereof, and a cylindrical fireproof coating is formed on the lightweight groove section steel. Each end of the arcuate refractory covering is fastened by applying tapping screws 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a fireproof coating structure for a steel column.

[0002]

[Prior art and its problems]

Conventionally, as a fire-resistant coating structure of a steel-framed round pillar, as shown in FIG. 8, the circumference of a steel-framed round pillar a is concentrically provided with a cylindrical fire-resistant coating part b assembled from an arc-shaped fire-resistant coating material b ₁ through a circumferential gap C 1. It has been proposed to have a structure that surrounds each other.

In the fireproof coating structure having the above-mentioned structure, the fireproof coating material b ₁ constituting the fireproof coating portion b is respectively attached to the light-weight grooved steel d fixed to the steel frame round column a by the application of the welding means to the tapping screw e. However, it is difficult to secure human resources, and it is also necessary to cure sparks generated during welding work. It was troublesome next to me.

The present invention has been made for the purpose of eliminating such conventional problems.

[0005]

[Means for solving problems]

 The present invention relates to a steel-framed round column fire-resistant coating structure in which the circumference of a steel-framed round column constituting a frame of a building is covered by a cylindrical fire-resistant coating section with a clearance, and the cylindrical fire-resistant coating section is formed from an arc-shaped fire-resistant coating material vertically. It is assembled so that the directional seams are aligned, and in the circumferential gap between the steel round column and the cylindrical refractory cladding, the lightweight grooved steel is aligned along the longitudinal seam of the cylindrical refractory cladding. The light-weight grooved steel is fixed to the concrete floor surface of the building at the lower end in an upright state by the use of fasteners, and the light-weight grooved steel forms a circular cylindrical fireproof coating. The present invention relates to a steel-framed round-column fire-resistant coating structure in which each end of the arc-shaped fire-resistant coating material is fixed by applying tapping screws.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

In one embodiment of the present invention shown in FIGS. 1 to 4, a cylindrical fireproof coating 3 surrounding a steel column 1 through a circumferential gap 2 has a semi-cylindrical shape as shown in FIG. The refractory coating materials 3a, 3a are assembled from a pair of left and right.

As shown in FIG. 1, the cylindrical fireproof coating portion 3 has a three-stage structure of an upper stage 3 A, a middle stage 3 B and a lower stage 3 C, and is formed from the floor surface 6 to a height slightly above the ceiling surface 11, The longitudinal seams 4 of the steps are aligned.

As shown in FIG. 2, in the circumferential gap 2 between the steel-framed round pillar 1 and the cylindrical fireproof coating portion 3, a lightweight grooved steel is formed along the longitudinal seam 4 of the fireproof coating portion 3. 5 and 5 are installed. The lightweight channel steel 4 may be with or without a lip.

As shown in FIG. 4, the lower end of the lightweight channel steel 5 is attached and fixed to the concrete floor surface 6 of the building through an attachment metal piece 7 having an L-shaped side surface.

The mounting hardware 7 is fixed to the floor 6 by the construction studs 8 at the laterally oriented portion 7a, and is fixed to the lower end portion of the lightweight grooved steel 5 at the vertically oriented portion 7b by the tapping screw 9.

The semi-cylindrical refractory coating materials 3a, 3a forming the cylindrical coating portion 3 are attached and fixed to the lightweight grooved steel 5, 5 by applying tapping screws 10 at both ends thereof. At the time of mounting and fixing work with the tapping screw 10, the light weight grooved steels 5 and 5 may be reversed due to the screwing tightening pressure of the tapping screw 10. Therefore, in order to prevent this reversal, the lightweight grooved steels 5 and 5 may be reversed. A packing material 12 made of refractory, for example, calcium silicate, can be packed in each of the parts 5 and 5 where the tapping screw 10 is screwed. The packing material 12 is bonded and fixed to a predetermined position of the steel-framed round pillar 1 by applying an adhesive (not shown) in a process before the light-weight grooved steels 5 and 5 are installed and fixed.

As shown in FIG. 2, a space holding member 14 made of, for example, calcium silicate is provided between the steel-framed round pillar 1 and the cylindrical fireproof coating portion 3 to form the circumferential gap 2. ing. The semi-cylindrical refractory coating material 3a may be fixed to the spacing member 14 with tapping screws as needed.

According to the fireproof coating structure according to the present invention, the light weight grooved steel 5 is fixed to the concrete floor surface 6 by applying the fasteners such as the mounting hardware 7, the construction stud 8 and the tapping screw 9 to the concrete floor surface 6. Therefore, it does not require any welding work as seen in the conventional structure shown in FIG.

In the present invention, the mounting direction of the L-shaped mounting hardware 7 may be outward as shown in FIG. 4 or may be inward as shown in FIG.

As shown in FIG. 6, overhangs 5a, 5a are formed by bending at the lower end of the lightweight grooved steel 5, and fixed to the concrete floor surface 6 by applying construction studs 8 at the overhangs 5a, 5a. In that case, the use of the L-shaped attachment hardware 7 can be omitted.

The horizontal seams 13 between the steps of the cylindrical refractory covering 3 may be aligned left and right as shown in FIG. 1 with reference to the longitudinal seams 4 or shown in FIG. It may be offset by a half pitch.

A calcium silicate molding is usually used as the fireproof coating 3a, but other materials may be used.

The shape of the fire-resistant coating material 3a is preferably a semi-cylindrical shape which is a two-division type, but may be a three-division type or a four-division type.

[0020]

[Effect of device]

 Since the fireproof coating structure of the present invention does not require any welding work, there is no problem in securing human resources, and complicated work such as curing of welding sparks can be omitted and the workability can be improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is an enlarged cross-sectional view taken along line 3-3 of FIG.

FIG. 4 is an exploded perspective view showing a mounting and fixing portion of a lower end of the lightweight grooved steel in FIG.

FIG. 5 is a perspective view showing a modification of FIG.

FIG. 6 is a perspective view showing still another modification of FIG.

FIG. 7 is a partially cutaway front view showing a state in which the horizontal seam of the fireproof coating is shifted by a half pitch on the left and right with respect to the vertical seam.

FIG. 8 is an explanatory diagram of a conventional structure.

[Explanation of symbols]

 1 Steel round column 2 Circumferential gap 3 Cylindrical fireproof coating 4 Longitudinal seam 5 Lightweight grooved steel 6 Concrete floor surface 7 Mounting hardware 8 Construction stud 9 Tapping screw 10 Tapping screw 11 Ceiling surface 12 Packing material 13 Lateral seam 14 Spacing Holding member

Claims (1)

[Scope of utility model registration request] 1. In a fire-resistant coating structure of a steel-framed round pillar which surrounds a steel-framed round pillar constituting a frame of a building with a cylindrical fire-resistant covering portion with a clearance, the cylindrical fire-resistant covering portion is formed of an arc-shaped fire-resistant covering material. It is assembled so that the longitudinal seams are aligned, and in the circumferential gap between the steel round column and the cylindrical fireproof coating, a lightweight groove is formed along the vertical seam of the cylindrical fireproof coating. Shaped steel is installed, the light weight grooved steel is fixed to the concrete floor surface of the building at the lower end in an upright state by applying a fastener, and the light weight grooved steel has a circular arc shape forming a cylindrical fireproof coating. A fireproof coating structure of a steel-framed round column, characterized in that each end of the fireproof coating is fixed by applying tapping screws.