JPH0552122B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to relatively large buildings such as general buildings, condominiums, hospitals, department stores, factories, etc. Cable wiring and other wiring for telecommunications equipment, etc.
The present invention relates to a fireproof structure for a penetration part of a fireproof slab of a building, which is applied to prevent the spread of fire and smoke leakage in the space of the throughhole when installing piping, etc.

[Prior Art] Generally, in a large building, in order to prevent the fire from spreading throughout the building if a fire breaks out in the building, the building is divided into several sections of appropriate size when constructing the frame of the building. Fire-resistant slabs such as walls and floors are installed at the boundaries of each compartment to create fireproof divisions. When, for example, cable wiring is to be carried out through the fireproof slab that constitutes this fireproof division, a through hole is provided at a pre-designed position in this fireproof slab, and the cable wiring is carried out using this through hole. There is.

These through-holes are usually made larger to accommodate the installation of additional cables, and if left as is, the through-holes and cables may become disconnected in the event of a fire. The fire spreads from one fireproof compartment to the other through gaps created between them and combustible materials such as rubber and plastic covering the copper wires of the cables. This results in the loss of the meaning that formed it.

For this reason, even in the past, when a through hole for a cable facility etc. was opened in a fireproof slab such as a wall or floor, the space of this through hole was closed with inorganic fiber etc. after the cable etc. were installed to prevent the spread of fire. We are taking measures to prevent the spread of fire.

This fire spread prevention treatment includes, for example,
A holding plate formed of an asbestos calcium silicate plate that is one size larger than the opening area of the through hole is divided into two parts, a notch groove is formed in the dividing edge of the divided holding plate, and the divided edges of these divided holding plates are butted against each other. When the cable is installed through the through hole, an opening is formed to accommodate the installed cable, and the presser plate thus formed is covered with fireproof putty, fireproof seal, or other fireproof seal on both sides of the opening edge of the throughhole. The space inside the through hole, which is airtightly installed through the material and partitioned by this holding plate,
In other words, the fireproof space is densely filled with inorganic fibers such as rock wool, and the divided edges of the divided holding plates that are butted against each other and the openings of each holding plate through which the cables pass are airtightly closed with fireproof sealing material. However, it is designed to prevent a fire that occurs in one fireproof compartment from spreading or leaking smoke to the other fireproof compartment through the gap between the through-hole surrounding wall and the cable or the combustible material in the cable. Are known.

[Problems to be solved by the invention] However, in such conventional fire spread prevention treatment, it is extremely troublesome work to densely fill the fireproof space formed in the through hole with inorganic fibers such as rock wool. be. In addition, if the penetrating object is a cable of telecommunications equipment and a fire lasts for a long time, the heat from the fire generated on one side of the fireproof slab will be transmitted through the copper wire with good thermal conductivity in the center of the cable, and the fireproof space will be affected. Furthermore, at this time, the inorganic fibers filled in the fireproof space act as a heat insulator, and the copper wire at the center of the cable becomes increasingly hot, and the temperature increases on the other side of the fireproof slab. Combustible materials such as rubber and plastic that cover the copper wire of the cable may be heated above their ignition point and ignite, causing the fire to spread to the other side of the fireproof slab. Furthermore, if the combustible material in the cable burns in the fire-protected space, a gap will be created between the inorganic fibers filled in the fire-protected space and the copper wire of the cable, and smoke may leak from there. There was a fear that in the event of a fire, the cables that were cut could fall downstairs due to the loss of this function.

Therefore, an object of the present invention is to improve the workability of fire spread prevention treatment applied to the penetration parts of building fireproof slabs, and to exhibit superior fire spread prevention performance and smoke leakage prevention effect than ever before. An object of the present invention is to provide a fireproof structure for a penetration part of a building fireproof slab.

[Means for Solving the Problems] That is, the present invention forms a fireproof space with a fireproof material in a through hole that is opened in a fireproof slab of a building and through which a penetrating object such as a cable passes, and in this fireproof space there is no fireproof space. Endothermic/thermally expandable granules made by molding a mixture of an endothermic refractory material and a thermally expandable refractory material or a refractory material having endothermic and thermally expandable properties into granules with a particle size of 1 to 25 mm using a binder. This is a fireproof structure for a penetration part of a building fireproof slab, which is filled with a fireproof filler and completely surrounds the penetrating object in the fireproof space with heat-absorbing and thermally expandable granular fireproof filler.

In the present invention, the fireproof space formed of fireproof material is formed in a through hole opened in a fireproof slab that constitutes the floor and walls of a building, and when filled with granular fireproof filler, this fireproof space is It is only necessary to completely surround the penetrating object such as a cable passing through the above-mentioned through-hole and to cut off one side of the fireproof slab from the other side. A space closed by a bottom wall member and the other side closed by a lid member, or a box-shaped space formed by a side wall member disposed along the peripheral wall of the through hole in addition to the bottom wall member and lid member. It is an enclosed space. The fireproof materials that form this fireproof space include calcium silicate plates, which are commonly used.
Inorganic molded plates such as ALC plates and asbestos slate plates, as well as other suitable metal materials such as steel plates and steel frames, can be used, but silica/alumina fibers are preferable from the viewpoint of being lightweight, fire-resistant, and workable. A refractory inorganic fiber molded plate made of refractory inorganic fibers such as silica fiber, alumina fiber, etc., is used. In addition, the side wall member forming the fireproof space may be made of a metal material such as a steel plate or a steel box, since it is in contact with the peripheral wall surface of the through hole and has a small thermal load. A mounting bracket for attaching to the opening edge of the hole is integrally formed on the side wall member formed of this metal material, and can be integrally attached by means such as welding, or anchored in advance to the peripheral wall of the through-hole. By burying bolts, etc., and fixing between these anchor bolts, etc. and the side wall member with appropriate fixing means such as bolts and nuts, or by embedding a steel box in advance in the peripheral wall of the through hole, etc. , it can also be used as a means for attaching and fixing the penetration part fireproof structure of the present invention to the penetration hole. Furthermore, in order to adjust the size of the fireproof space formed when the through hole is too large, the fireproof material forming this fireproof space may be made of the above-mentioned fireproof inorganic fiber molded board, etc., as necessary. It is also possible to use a fireproof auxiliary material, such as inorganic fibers such as rock wool, or fireproof inorganic fiber molded plates cut into small blocks, which are filled in the space leaving a fireproof space.

The heat-absorbing/thermally expandable granular fireproof filler (hereinafter referred to as the "fireproof filler") that is filled in the fireproof space formed by the fireproof material is basically a penetrating material filled with the fireproof filler. In order to ensure the fireproof performance of the fireproof structure, one or two types of endothermic fireproofing materials that absorb a large amount of heat when heated and decompose and/or change in quality are used.
A thermally expandable refractory material that expands in volume when heated to fill gaps between the refractory fillers and gaps between the refractory filler and cables, etc., and solidify the refractory filler together. The main material is seeds or a mixture of two or more kinds, which are granulated with a binder.

Examples of the endothermic refractory materials used as constituent materials of the present refractory filler include borax, aluminum hydroxide, hydrated magnesium, hydrated silicic acid, alum, hydrated calcium silicate, dihydrate, ettringite, Examples include bentonite, zeolite, etc.
Examples of thermally expandable fireproof materials include borax, vermiculite,
Examples include hydrated mica, obsidian, pearlite, and the like. In addition, borax absorbs a large amount of heat when heated, decomposes, generates water vapor, and expands in volume, so if it is used as the main material of this refractory filler, it can be used as an endothermic refractory material or a thermally expandable refractory material. It fulfills the role of both materials at the same time.

In addition, examples of binders for bonding these fireproof materials include polyacetic acid emulsion, polyethylene-vinyl acetate emulsion, polyvinyl alcohol, polyacrylic acid emulsion,
Examples include synthetic polymer binders such as polymethacrylic acid emulsion, natural polymer binders such as starch glue, CMC, MC, glue, casein, gelatin, and inorganic binders such as water glass and colloidal silica. I can do it.

The particle size of the present refractory filler is usually in the range of 1 to 25 mm, preferably 2 to 10 mm. If the particle size of the present fireproof filler is smaller than 1 mm, there is a risk of leakage from the filled portion of the fireproof structure, and if it is larger than 25 mm, the filling operation becomes difficult and there is a problem that unfilled areas remain.

In addition, when granulating using one or more mixtures of the above-mentioned endothermic refractory materials, one or more mixtures of thermally expandable refractory materials, and a binder, for example, bentonite, etc. The workability of granulation work can be improved by adding a shape-retaining material such as MC, CMC, polyethylene glycol, or the like.

When the fire protection structure for a penetration part of the present invention is a fire protection structure for a cable penetration part, particularly preferably, a plurality of mounting brackets are attached to the opening edge of a penetration hole opened in a fireproof slab that constitutes a fire protection division of a building; at least a pair of bottom wall members made of fire-resistant inorganic fiber molded plates that are attached to one side of the through-hole while avoiding cables passing through the through-hole and held by the mounting bracket;
At least four side wall members made of fire-resistant inorganic fiber molded plates are installed along the peripheral wall of the through hole, and are installed on the other side of the through hole avoiding cables, and together with the bottom wall member and side wall members, a fireproof space is created. at least one pair of lid members made of fire-resistant inorganic fiber molded plates to form, the present fire-resistant filler filled in the fireproof space, the butt portions of each bottom wall member, the butt portions of each lid member, the cable and the bottom This structure includes a fireproof sealing material that fills gaps such as those between the wall member and the lid member.

Mounting fittings used for this purpose may be fire-resistant and capable of holding the bottom wall member in place within the through-hole, for example, on approximately the same plane as one of the walls. It is of any type, such as one that is formed in a substantially U-shape and has a locking part that is positioned to support the bottom wall member and a fixing part that is provided at both ends of the locking part and is fixed to the opening edge of the through hole. However, it is preferable to include a fixing part that is fixed to the opening edge of the through hole, and a locking part that protrudes inward from the end of the through hole and is located substantially on the same plane as the wall surface. It consists of a locking member and a support member installed between the locking parts of the locking member to avoid the cable passing through the through hole, and the through hole can be made to any size by simply adjusting the length of the support member. It is good to have something that can also be applied. Also, regarding fireproof sealing materials,
For example, conventionally known materials such as fireproof caulking and fireproof putty can be used.

The procedure for forming the fireproof structure of the penetration part of the building fireproof slab of the present invention is not particularly limited. at least one pair of bottom wall members made of fire-resistant inorganic fiber molded plates are fitted into the through-hole, and at least four side wall members made of fire-resistant inorganic fiber molded plates are fitted along the peripheral wall of the through-hole to form a space. , the butt part of each bottom wall member and the space between this bottom wall member and the cable are sealed with fireproof sealing material, and fireproofing aid is applied as necessary to form a fireproof space around the cable in the above space. The fireproof space thus formed is filled with this fire-resistant filler, covered with at least a pair of lid members made of fire-resistant inorganic fiber molded board similar to the bottom wall member, and finally each lid member is Seal the butt part and the gap between this cover member and the cable with a fireproof sealant.

[Function] The fireproof structure of the penetration part of the building fireproof slab of the present invention is as follows:
A fireproof space is formed in the through hole opened in the fireproof slab, and this fireproof space is filled with heat-absorbing and thermally expandable granular fireproof filler formed into granules with a particle size of 1 to 2 mm. Therefore, airtight filling of the fireproof filler into this fireproof space is extremely easy and reliable.
In addition, for example, in the case of a fireproof structure for cable penetrations, the cable can be tightly covered with the fireproof filler over its entire length within the fireproof space, and even if a fire breaks out in one of the fireproof compartments, the fireproof filler will remain intact. The heat-absorbing fireproofing material that makes up the cable absorbs heat and exerts a cooling effect, while the thermally expandable fireproofing material expands and secures the cable within this fireproof space. There is no possibility of fire spreading or smoke leaking to the other fireproof compartment due to combustion of combustible material, that is, combustible cable sheathing material.

[Examples] The present invention will be specifically described below based on examples shown in the accompanying drawings.

1 and 2, a fireproof structure for a penetration part of a building fireproof slab according to an embodiment of the present invention is shown. This fire protection structure includes a plurality of mounting brackets 1 that are attached to the opening edge of a through hole 8 that vertically penetrates a fireproof slab, for example, a floor slab 7, that constitutes a fire prevention section of a building, and the through hole 8. A pair of bottom wall members 2 made of fire-resistant inorganic fiber molded plates are fitted into the through hole 8 while avoiding the cables 9a and 9b passing through the through hole 8, and are held by the mounting bracket 1 to form the bottom wall of the through hole 8.
a, 2b, and are fitted along the peripheral wall of the through hole 8,
Together with the pair of bottom wall members 2a, 2b, four side wall members 3a, 3b made of fireproof inorganic fiber molded plates form a fireproof space, and are filled into the fireproof space to determine the size of the fireproof space. and a fireproof auxiliary material 4 that is adjusted to a sufficient size, a pair of lid members 5a and 5b made of fireproof inorganic fiber molded plates that close the fireproof space while avoiding the cables 9a and 9b, and the above-mentioned materials located around the cables 9a and 9b. Fireproof sealing materials 6a, 6b that fill the gaps between the bottom wall members 2a, 2b and lid members 5a, 5b and the cables 9a, 9b, the bottom wall members 2a, 2b, the lid members 5a, 5b, and a fireproof auxiliary material. 4 is composed of a granular fireproof filler A that is filled into the fireproof space formed by the fireproof filler A.

In this embodiment, as shown in FIG. 3, the mounting bracket 1 includes a fixing part 11 fixed to the opening edge of the through hole 8 of the floor slab 7 with fixing means 10 such as screws or concrete nails, and a lower end thereof. a locking member 1a including a locking portion 12 that protrudes inward from the through hole 8 and is located substantially on the same plane as the lower wall surface;
A flat support member 1b is installed between the locking portions 12 of the locking member 1a while avoiding the cables 9a and 9b passing through the through hole 8. The length of the support member 1b is adjusted to adapt to the size of the through hole 8. In this embodiment, a bent part 12a is provided at the tip of the locking part 12 of the locking member 1a, and the end of the support member 1b is adjusted to a predetermined length according to the size of the through hole 8. This bent part 1
The support member 1b is connected to the locking member 1a by bending and locking at 2a.

Also, a pair of bottom wall members 2a, 2b forming the bottom wall of the through hole 8, four side wall members 3a, 3b fitted along the peripheral wall of the through hole 8, and a pair of side wall members 3a, 3b that are fitted along the peripheral wall of the through hole 8, and a pair of bottom wall members 2a, 2b that form the bottom wall of the through hole 8, and a pair of side wall members 3a, 3b that are fitted along the peripheral wall of the through hole 8, The lid members 5a and 5b are both fire-resistant inorganic fiber molded boards, in this example, ceramic fiber boards (manufactured by Nippon Steel Chemical Co., Ltd.) that are wet-formed by adding a polymeric binder to silica/alumina fibers. Name: S Fiber
SC1260 board), and also includes the pair of bottom wall members 2a, 2b and the pair of lid members 5.
Notches 13a, 13b and 14a are formed in a and 5b so that gaps are formed for the cables 9a and 9b to pass through when they are butted against each other, respectively.
14b is formed.

Further, within the through hole 8, a pair of bottom wall members 2a, 2
b. The fire-resistant auxiliary material 4, which is filled into the space formed using the four side wall members 3a, 3b and the pair of lid members 5a, 5b to adjust the fireproof space, is made of rock wool molded with a polymeric binder. It is made of rock wool molded board (trade name: S-Board 3150, manufactured by Nippon Steel Chemical Co., Ltd.) that is cut into blocks of a predetermined size. There is.

The gap between the bottom wall members 2a, 2b and the cables 9a, 9b is filled with fireproof putty (Nippon Steel Chemical), which is a fireproof sealing material 6a. A fireproof sealing material (product name: CAB SEAL manufactured by Co., Ltd.) is applied to the gaps between the butt parts of the lid members 5a, 5b and the gaps between the lid members 5a, 5b and the cables 9a, 9b. A fireproof putty (trade name: CAB SEAL, manufactured by Nippon Steel Chemical Co., Ltd.), which is No. 6b, is applied, thereby airtightly sealing the fireproof space.

This fireproof filler A is filled into the above fireproof space.
contains 70 parts by weight of borax (endothermic refractory material, thermally expandable refractory material) and 25 parts by weight of aluminum hydroxide (endothermic refractory material).
5 parts by weight of bentonite (endothermic refractory material, shape-retaining material), 1.5 parts by weight of polyacrylic acid emulsion (binder) (as solid content), and 15 parts by weight of 0.5% by weight MC (thickener) aqueous solution. Knead parts by weight,
It is granulated into granules with an average particle size of 3.5 mm.

Therefore, in order to form the fireproof structure for the penetration part of the building fireproof slab of this embodiment, first, a predetermined number of locking members 1a are fixed to the opening edge of the through hole 8 made in the floor slab 7, and the locking members 1a are fixed to each other. Between the locking portions 12 of the opposing pairs of locking members 1a, cables 9a, 9b passing through the through holes 8, other locking members 1a, or plate-shaped support members 1b are installed within a range that does not interfere with each other. Next, a pair of bottom wall members 2 are inserted into this through hole 8.
A, 2b are inserted and fitted to form a bottom wall, and four side wall members 3a, 3b are fitted along the circumferential wall of the through hole 8, and framed with appropriate means such as fireproof adhesive. A box-shaped space made of a fire-resistant inorganic fiber molded plate is formed in the through hole 8, and each bottom wall member 2
A, 2b and the gaps between each bottom wall member 2a, 2b and cables 9a, 9b are filled with fireproof sealing material 6a made of fluid fireproof paint, and each bottom wall member 2a, 2b and cable A fireproof sealing material 6a made of fireproof putty is heaped up in a tapered shape between the cables 9a and 9b, and the cable 9 is sealed in this space.
The fireproofing auxiliary material 4 is filled so that a fireproof space of a predetermined size is formed around parts a and 9b, and then the present fireproof filler material A is filled into the fireproof space thus formed.
is filled, covered with lid members 5a, 5b from above, and fixed with appropriate means such as fireproof adhesive, and finally, the gaps between each lid member 5a, 5b and these lids are Members 5a, 5b and cable 9
A fireproof sealing material 6c made of a fluid fireproof paint is filled between the cables 9a and 9b.
A fireproof sealing material 6c made of fireproof putty is heaped up in a tapered shape along lines a and 9b for sealing.

[Fire Resistance Test] The test specimen of the above example was manufactured based on the standards of the Japan Building Center. At this time, rock wool molded board (S-board
3150) 28 was used, and 65 of the above refractory filler A was used.

Regarding the test specimen manufactured in this way, JIS
As a result of subjecting it to a 2-hour fire resistance test based on the fire resistance test method of A 1304, no abnormality was observed on the back side of the specimen during or after heating for 2 hours. Further, at this time, the temperature of the fireproof sealing material 6b in the cable penetration portion on the back side did not exceed 300° C., which sufficiently satisfied the standards for a fireproof structure for the compartment penetration portion.

Next, FIG. 5 shows a modification of the above embodiment, in which four side wall members 3a, 3b whose height dimension is larger than the thickness dimension of the floor slab 7,
This is applied when the thickness of the floor slab 7 is so small that a fireproof structure capable of exhibiting sufficient fire spread prevention performance and smoke leakage prevention performance cannot be formed within that thickness range.

In the above embodiment and its variations, four side wall members 3a are used as fireproof materials to form a fireproof space, but as shown in FIG. 6, for example, these side wall members 3a may be omitted. In addition to forming a fireproof space, the fireproof auxiliary material 4 can be omitted and the peripheral wall of the through hole 8 and each bottom wall member 2a,
2b and the lid members 5a and 5b is defined as a fireproof space, and the fireproof filler A is filled in the entire fireproof space.
may be filled with.

In addition, regarding the present fireproof filler A to be filled in the fireproof space, for example, borax (endothermic fireproof material,
70 parts by weight of vermiculite (thermally expandable fireproof material), 70 parts by weight of polyvinyl acetate emulsion (binder) (as solid content), and 10 parts by weight of water. It can be kneaded and granulated into granules with an average particle size of 4.5 mm, etc., and can be used by appropriately changing the types and blending ratios of the heat-absorbing refractory material, the thermally expandable refractory material, the binder, and other additives.

In the above embodiment, an example has been described in which the mounting bracket 1 is fixed with the fixing means 10 such as a screw or a concrete nail, but the mounting bracket 1 may simply be installed at the opening edge of the through hole 8. In addition, in FIG. 3, the locking member 1a used alone as the mounting bracket 1 has a locking portion 12 and is attached to the support member 1a.
This can be omitted by strengthening the locking member 1a used together with b and the supporting member 1b. Furthermore, in the embodiment described above, the bending part 12a is provided at the tip of the locking part 12 of the locking member 1a, and the end of the support member 1b is bent and locked by the bending part 12a, thereby locking the support member 1b. The supporting member 1b is connected to the stop member 1a, and as shown in FIG.
The support member 1b is fitted between the pair of locking members 1a so that the locking portions 12 (without the bent portions 12a) of the locking member 1a are fitted into the recesses at both ends of the support member 1b and fixed. By doing so, it is possible to improve the support strength of the support member 1b and the installation workability.

Furthermore, FIG. 8 shows a fire protection structure for a penetration part according to another embodiment, and unlike the cases of the above-mentioned embodiments and comparative examples, four side wall members 3a (3b are not shown) forming a fire protection space are shown. ) is formed into a rectangular steel plate and serves as a means for attaching to the through hole 8, and the bottom wall members 2a, 2b and the lid members 5a, 5b
and are each made of a refractory inorganic fiber molded plate as in each of the above embodiments. In this embodiment, an anchor bolt 15 is embedded in the peripheral wall of the through hole 8 of the floor slab 7 in advance, and a connection (not shown) is made between the anchor bolt 15 and each side wall member 3a, 3b constituting the steel box. Each side wall member 3a, 3b is attached to the peripheral wall surface of the through hole 8 by fixing with bolts and nuts.

[Effects of the Invention] According to the fireproof structure of the penetrating part of the building fireproof slab of the present invention, an endothermic and thermally expandable granular fireproof filler formed into granules with a particle size of 1 to 2 mm is used.
It is extremely easy to airtightly fill the fireproof spaces formed in the through-holes of the fireproof slab with this fireproof filler, which significantly improves the workability.In addition, the use of asbestos calcium silicate plates, etc. is not used, which reduces the spread of fire. There are no problems in the working environment associated with prevention work, and the fireproof filler filled in the fireproof space has a cooling effect and prevents the creation of gaps in the event of a fire, and has better fire spread prevention performance than ever before. It is something that demonstrates the.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the fire protection structure of the penetration part of a building fireproof slab according to an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line - - of Fig. 1, and Fig. 3 is a mounting bracket attached to the opening edge of the through hole. 4 is a perspective view showing a pair of bottom wall members, four side wall members, and a pair of lid members for forming a fireproof space in the through hole, and FIG. 5 is a perspective view showing the above-mentioned 6 is a sectional view similar to FIG. 1 showing a modification of the embodiment, FIG. 6 is a sectional view similar to FIG. 1 showing another embodiment of the present invention, and FIG. 6 is a sectional view similar to FIG. FIG. 7 is a perspective view showing a modified example of a locking member and a support member and the state of connection therebetween, and FIG. 8 shows a fire protection structure for a penetration part according to yet another embodiment. FIG. Explanation of symbols, A...Refractory filler, 2a, 2b
...Bottom wall member (fireproof material), 3a, 3b...Side wall member (fireproof material), 4...Fireproof auxiliary material, 5a, 5b...
...Lid member, 7...Floor slab (fireproof slab), 8...
...through hole.

Claims (1)

[Claims] 1. A fireproof space is formed using a fireproof material in a through-hole that is opened in a fireproof slab of a building and through which a penetrating object such as a cable passes, and a heat-absorbing fireproof material is installed in this fireproof space using a binder. Filled with an endothermic/thermally expandable granular refractory filler formed by forming a mixture of a heat-absorbing and thermally-expandable refractory material or an endothermic and thermally-expandable refractory material into granules with a particle size of 1 to 25 mm, the above-mentioned fireproofing material is A fireproof structure for a penetration part of a building fireproof slab, characterized in that a penetration part is completely surrounded in a space by a heat-absorbing and thermally expandable granular fireproof filler. 2. A fireproof structure for a penetrating part of a building fireproof slab according to claim 1, wherein the fireproof material forming the fireproof space is formed of a fireproof inorganic fiber molded board. 3. A fireproof structure for a penetrating part of a building fireproof slab according to claim 1, wherein the fireproof materials forming the fireproof space are a bottom wall member, a lid member, and a side wall member formed of fireproof inorganic fiber molded plates. 4. Claim 1, wherein the fireproof materials forming the fireproof space are a bottom wall member and a lid member made of a fireproof inorganic fiber molded board or a fireproof inorganic fiber molded board, and a side wall member made of a metal material. Fireproof structure for penetrations of building fireproof slabs as described in Section 2. 5 The endothermic refractory material constituting the endothermic/thermally expandable granular refractory filler is one or two types of crystal water-containing inorganic materials.
The fireproof structure for a penetration part of a building fireproof slab according to claim 1, which is a mixture of more than one species. 6. A fireproof structure for a penetrating part of a building fireproof slab according to claim 1, wherein the thermally expandable fireproofing material constituting the fireproof filler is an inorganic material that expands when heated.