JPH07100955B2 - Fireproof structure of building - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fireproof structure of a building in which a first steel material such as a beam is covered with a fireproof material.

[Prior Art] In Japan, in the case of a steel structure building, in order to prevent the steel material temperature of the structural member from rising and the mechanical properties of the structural member from deteriorating in the event of a fire, the surface of the structural member such as a pillar or beam is prevented. It is legally obliged to coat the material with a refractory material such as calcium silicate. Japanese Patent Application Laid-Open No. 61-126252 discloses an example of a refractory material assembly structure for a beam or the like.

By the way, the so-called unit housing which has been developed in recent years is also a kind of the above-mentioned steel structure building. Generally, the steel structure in the unit housing has four pillars arranged in four corners and a horizontal posture between these pillars. It has a large girder and a small beam for steady rest that is bridged between the opposite large girders. In this case, a strict fireproof coating must be applied to the first steel material such as a pillar or a girder to which a heavy load is applied. The second steel material such as beam is indirectly fireproof coated with ceiling material, floor board, etc.

Conventionally, when a refractory material is attached to the side of the girder on which the girder is to be attached, the girder is attached between the girders in advance before attaching the refractory material, and then cut into predetermined dimensions and divided. The refractory material was placed so as to avoid the beam, and was appropriately attached by fixing means.

[Problems to be Solved by the Invention] However, in the above-described conventional refractory structure, the refractory material has to be finely divided, and there is a drawback that the mounting work is troublesome. Also, the larger the number of refractory materials, the more joints between the refractory materials as a result, and there is a possibility that sufficient fire resistance performance may not be exhibited in the case of fire unless the treatment for these joints is ensured. was there.

The present invention has been made in view of the above-mentioned problems of the conventional technique, and an object thereof is to provide a fireproof structure of a building with improved workability and fireproof performance. .

[Means for Solving the Problems] The present invention has been made to achieve the above object,
The gist thereof is that the first steel material, the second steel material that is attached so as to intersect with the first steel material, and the side on which the second steel material is attached are attached along the longitudinal direction of the first steel material. In a fireproof structure of a building made of a refractory material, a through hole is provided in the refractory material, and a highly rigid sleeve having a length corresponding to the thickness of the refractory material is inserted into the through hole. A fireproof structure of a building, characterized in that the first steel material and the second steel material are connected and fixed by interposing a fireproof material between them by a fixture inserted through.

[Operation] Since the first steel material and the second steel material are connected and fixed through a fixture penetrating the refractory material, the refractory material can be used in a long length without being divided, and the construction can be performed. The property is improved.

Moreover, since the sleeve is attached to the through hole of the refractory material into which the fixture is inserted, the refractory material is not crushed when the fixture is tightened.

As described above, since a long refractory material can be used, the seams between the refractory materials are reduced. Further, the through hole provided in the refractory material is closed by inserting the fixing tool. These will improve the fire resistance.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings from FIG. 1 to FIG.

Incidentally, the fire resistant structure in this embodiment is a mode in the case where the large beam as the first steel material is connected and fixed to the small beam as the second steel material, and the large beam is covered with the fire resistant material,
1 is a longitudinal sectional view thereof, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is an exploded perspective view.

In the figure, reference numeral 1 is a large beam, and reference numeral 2 is a small beam, both of which are made of so-called groove-shaped steel (channel material) having a U-shaped cross section. However, the girder 1 is larger than the girder 2. The girder 1 is arranged opposite to another girder (not shown) in a pair, and the pair of horizontal portions 1a of the girder 1 and the pair of horizontal portions of the other girder face each other. The small beam 2 is bridged between the large beam 1 and another large beam. In the following, the girder 1 will be described, but the other girders described above have the same structure.

A plurality of gussets 3 having a U-shaped cross section are attached to the girder 1 on the side facing the other girders at regular intervals in the longitudinal direction of the girder 1. The gusset 3 has a U-shaped cross section, and is constituted by a pair of opposed arm portions 3a and 3b connected by a back portion 3c. Each gusset 3 has its longitudinal direction orthogonal to the longitudinal direction of the girder 1, one arm 3a is brought into surface contact with the vertical part 1b of the girder 1, and two fixtures 4, which penetrate these,
It is fixed to the girder 1 by 4. The other arm 3b of each gusset 3 projects from the ends of both horizontal portions 1a of the girder 1 so as to be closer to the other girder.

On the other arm 3b of each of the gussets 3, a long refractory material 5 is attached along the longitudinal direction of the girder 1 and hung on these gussets 3. The refractory material 5 is formed of, for example, calcium silicate, and a pair of through holes 5a, 5a arranged in the vertical direction is provided at a portion contacting the arm portion 3b of each gusset 3.
Is provided. A sleeve 6 made of a highly rigid steel pipe having a length equal to the thickness of the refractory material 5 is inserted into each through hole 5a. The outer diameter of the sleeve 6 is substantially the same as the inner diameter of the through hole 5a so that no gap is created between the two.

In the refractory material 5, another gusset 7 having an L-shaped cross section is arranged on the back surface of the gusset 3 to correspond to the gusset 3. The gusset 7 has its longitudinal direction orthogonal to the longitudinal direction of the refractory material 5, one side 7a is brought into surface contact with the back surface of the refractory material 5, and the other side 7b is erected from the one side 7a toward the other girder. I am letting you.

The gusset 3, the refractory material 5, and the gusset 7 are the gusset 3
The sleeve 6 attached to the through hole 5a of the refractory material 5 is inserted through the arm portion 3b, and is firmly tightened by the fixing tool 8 penetrating one side 7a of the gusset 7. At this time, since each sleeve 6 is closed by inserting the fixture 8, the flame does not pass through the sleeve 6 during a fire, and the fire resistance does not deteriorate. Further, since the sleeve 6 is highly rigid, the refractory material 5 will not be crushed when the fixture 8 is tightened.

One end of the beam 2 is welded and fixed to the other side 7b of the gusset 7, which is connected and fixed to the beam 1 as described above.
The other end of the beam 2 is welded and fixed to the other side of the same gusset connected and fixed to the other beam.

Although not shown in the drawing, the other three surfaces of the girder 1 are also covered with a refractory material of the same material as the refractory material 5, and the beam 2 is indirectly provided by a ceiling material, a floor material, or the like. Fireproof coated.

As described above, since the long refractory material 5 can be fixed to the girder 1 through the gusset 3, the sleeve 6, the gusset 7, and the fixture 8 without being divided, the workability is much higher than that of the conventional one. Good.

If the construction is performed in the above-mentioned order, the beam 2 can be attached after the refractory material 5 is attached to the girder 1. However,
The gusset 3 is fixed to the girder 1, the gusset 7 is fixed to the girder 2, and the refractory material 5 to which the sleeve 6 is attached in advance is arranged between the gusset 3 and the gusset 7. May be tightened by the fixture 8.

Further, since the long refractory material 5 can be used as described above, the seams between the refractory materials can be eliminated as compared with the conventional case where the refractory material is divided into small pieces, or Can be reduced. This can drastically reduce the probability that the fireproof performance will be deteriorated due to poor fireproofing of the seam portion, resulting in an improvement in fireproof performance.

The present invention is not limited to the above-mentioned embodiment and various modes can be adopted.

For example, the present invention is not limited to the fireproof structure for the steel structure of the unit house, but can also be applied to a steel structure building constructed locally.

Further, although the first steel material in this embodiment is a large beam and the second steel material is a small beam, the invention is not limited to this, and the first steel material is a pillar and the second steel material is a large beam. It is also applicable to the case where both steel materials are covered with a refractory material.

In addition, the design can be changed as appropriate, such as forming the refractory material from another material such as gypsum board.

[Effects of the Invention] As described above, the present invention has the excellent effects described below.

Since the first steel material and the second steel material are connected and fixed through the fixture penetrating the refractory material, the refractory material can be used in a long length without being divided and the workability is improved.

Moreover, since the sleeve is attached to the through hole of the refractory material into which the fixing tool is inserted, the refractory material is not crushed when the fixing tool is tightened.

Further, as described above, since a long refractory material can be used, the seams between the refractory materials are reduced, while the through holes provided in the refractory material are closed by inserting the fixing tool, so that the refractory performance is reduced. It will be further improved.

[Brief description of drawings]

1 to 3 show one embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a fireproof structure, FIG. 2 is a sectional view taken along the line II-II of FIG. FIG. 3 is an exploded perspective view. 1 ... Large beam (first steel material), 2 ... small beam (second steel material), 5 ... fireproof material, 5a ... through hole, 6 ... sleeve,
8: Fixture.

Claims (1)

[Claims] 1. A first steel material, a second steel material that is installed so as to intersect with the first steel material, and a side on which the second steel material is installed and which is installed along the longitudinal direction of the first steel material. In a fireproof structure of a building consisting of a refractory material to be provided, a through hole is provided in the above refractory material, and a sleeve having a high rigidity corresponding to the thickness of the refractory material is inserted into the through hole. A fireproof structure for a building, characterized in that a first steel material and a second steel material are connected and fixed with a refractory material sandwiched therebetween by a fixing tool that inserts a sleeve.