JP6505433B2 - Fireproof roof - Google Patents

Description

  The present invention relates to a fireproof roof provided below a bridge girder of a viaduct.

  In the space formed under the bridge girder of the viaduct, there may be provided a station building or a building serving as a commercial facility (hereinafter referred to as an elevated building). Under the elevated building, the law requires that the building be a quasi-refractory building or fire-resistant building according to the city planning area, and a fire protection section to prevent the spread of flames at the time of fire depending on the application in the building Need to be provided. As a method of the fire protection compartment, there is a method of placing a fireproof roof on a steel frame shed and installing a fire wall from the ground to a bridge girder. However, in the case of the method of mounting a fireproof roof on a shed, there was a case that the viaduct was low and an empty head could not be taken, making the shed difficult. On the other hand, in the case of the method of providing a fire wall from the ground to the bridge girder, the shape of the viaduct of the viaduct may be complicated and the installation may be difficult.

  By the way, rainwater may fall by the deterioration of the frame of the viaduct under the overpass building. For this reason, conventionally, by suspending a waterproof roof under a bridge girder, it is performed that rainwater dropped from a frame is prevented from entering the building. So, in recent years, when installing this waterproofing roof, the technique which utilizes a waterproofing roof also as a fireproof division is proposed by using what equipped the fireproof material with the fireproof material. Specifically, an angle steel is attached to the lower end of a bolt hanging from a high-crosslinked housing or a fireproof coated steel frame, and the horizontal section and horizontal portion of the cross-sectional shape so that the axis is horizontal. It is welded in an L-shape with the part extending in the direction, and the seat stat is attached to the part extending in the horizontal direction so that the bolt part faces downward, and the loosening material is attached to the bolt part It is said that a nut stop is carried out (refer to patent documents 1).

Unexamined-Japanese-Patent No. 2014-051792

A large number of seat stats are required to attach the lumber. In addition, each seat stat needs to be attached to the angle steel at equal intervals. For this reason, it took time and labor for the operation such as inking for determining the mounting position on the angle steel, and mounting of each seat stat. Moreover, when attaching an angle steel to the bolt which hangs down from a main building, since it also becomes necessary to do the work which welds an angle steel to a bolt at a high place, it had taken time and effort.
Furthermore, the seat stat is a dedicated member for attaching the lumber, and is expensive as compared to a member such as a standard bolt or screw, which has increased the installation cost of the fireproof roof.

  This invention is made in view of the said subject, and an object of this invention is to enable it to construct the fire protection division using a waterproof roof easily and at low cost.

To solve the above problems, the present invention includes a bolt portion depending from precursor underside of the viaduct or the building, the bolt holes are formed on the upper surface with to such a rod-shaped, passing the bolt portion into the bolt hole by being a nut fastened while being, a plurality of roofing material attached steel which is arranged so as to be parallel to each other to open the following intervals 900mm below the previous Kimukuro body, a plate-like lower surface is covered with a heat insulating material None of the previous SL includes a plurality of roofing material attached steel roofing fixed to member, and the roofing material attached steel, the first hole is formed in plurality at predetermined intervals along the axial direction on the lower surface, In the lumber, a plurality of second holes are respectively formed at predetermined positions, and a screw or a bolt is passed through the first hole and the second hole while being fastened to the lower surface of the lumber mounting steel material. It characterized that you have been fixed.

Conventionally, after using an angle steel, welding and attaching an angle steel to a bolt portion, marking for attaching a sheet stat to the angle steel is performed, and a number of sheet stats are attached to the angle steel, and then unlined. Although it was necessary to mount the material, according to the present invention, only one pre-drilled bolted member can be used in place of a plurality of seat stats, so that the inking process and individual sheets can be performed. The mounting process of the stat can be omitted.
Further, as in the seat stat, since the lumber is directly bolted to the lumber mounting steel without using a member fitted and attached to the steel, the strength of the roof can be enhanced.
In addition, since the work of welding the steel attachment steel material to the bolt portion hanging down from the housing can be omitted, the installation work can be performed more easily and at low cost.

In the above-mentioned invention, it is good also as what is provided with reinforcing steel between the above-mentioned high bridge .
In this way, the fireproof roof can be reinforced .

  According to the present invention, it is possible to install a fire protection compartment using a waterproof roof easily and at low cost.

It is a longitudinal section of a structure provided with a fireproof roof concerning an embodiment of the present invention. It is a perspective view of the fireproof roof of FIG. (A) is aa sectional drawing of FIG. 2, (b) is bb sectional drawing of FIG. It is a longitudinal cross-sectional view of the structure provided with the fireproof roof which concerns on the modification of the embodiment. It is a perspective view explaining the installation method of the fireproof roof concerning the modification of the embodiment.

  Hereinafter, the embodiment of the present invention will be described in detail with reference to FIGS.

[Fireproof roof structure]
First, the structure of the fireproof roof of this embodiment is demonstrated. 1 is a longitudinal sectional view of the elevated bridge provided with the fireproof roof 10 of the present embodiment, FIG. 2 is a perspective view of the fireproof roof 10, and FIG. 3A is aa sectional view of FIG. ) Is a cross-sectional view taken along the line b-b of FIG.
As shown in FIG. 1, the fireproof roof 10 of this embodiment forms a roof of a building 20 provided in a space below the bridge girder 11 of the elevated bridge 1 and forms a fire protection section of the building 20.
As shown in FIG. 2, the fireproof roof 10 has a plurality of steel frame bodies 2 supported by the frame 5 of the building 20, a plurality of steel board mounting steels 3 provided on the lower surface of the steel frame board 2, and a steel board installation. It is comprised by the unrolled material 4 grade | etc., Attached to the lower surface of the steel materials 3. FIG.

As shown in FIG. 3, the steel frame body 2 etc. is composed of a steel material 21, a heat insulating material 22 for covering the steel material 21, and a plurality of bolt parts 23 extending downward from the steel material 21. In order to be horizontal, the bolt portions 23 are disposed so as to hang downward and to be parallel to each other at a predetermined distance as shown in FIG. In addition, it is preferable that the installation space | interval of each steel frame 2 etc. be 2000 mm or less.
The heat insulating material 22 has fire resistance of 30 minutes or more.
A plurality of bolt portions 23 are welded to the lower surface of the steel material 21 at the upper end of all the screws along the axial direction of the steel material 21 with a spacing equal to the installation interval of the steel material mounting steel material 3.

The steel installation steel material 3 is a member that functions as a purlin of a building, and in addition to the lip grooved steel shown in FIG. 3, a surface perpendicular to the axis, such as grooved steel, H-shaped steel and Z-shaped steel. The cross-sectional shape at the time of cutting with the vertical section 31 extending in the vertical direction, the upper horizontal section 32 extending horizontally from the upper end of the vertical section 31, and the lower end of the vertical section 31 extend horizontally. The lower horizontal portion 33 is provided. A plurality of upper bolt holes (second bolt holes) are formed in the upper horizontal portion 32 along the axial direction at the same intervals as the installation intervals of the steel frame 2 and the like. A plurality of lower bolt holes are formed at predetermined intervals along the axial direction.
The steel material attachment steel materials 3 are disposed on the lower surface of the steel frame 2 etc. so as to be orthogonal to the extending direction of the steel frame 2 etc. and parallel to each other as shown in FIG. The bolt portion 23 of the steel frame 2 or the like is passed through and the upper surface of the upper horizontal portion 32 is held in contact with the lower surface of the steel frame 2 or the like by a nut 24. In addition, it is preferable that the installation space | interval of each lumber attachment steel materials 3 shall be 900 mm or less.

As shown in FIG. 3 (b), the lapping material 4 is composed of a folded plate 41 and a backing material 42 covering the entire lower surface of the folded plate 41, etc. A plurality of holes are provided at predetermined intervals along the extending direction of the top. The lumber 4 is disposed on the lower surface of the lumber mounting steel 3 so as to extend in the horizontal direction, and is fastened by the bolt 44 and the nut 45 in a state where the bolt hole is overlapped with the lower bolt hole of the lumber mounting steel 3 It is done.
The backing material 42 is a heat insulating material having fire resistance of 30 minutes or more.

[Seismic reinforcement method of ceiling]
Next, a method of installing the above-described fireproof roof 10 in the space under the bridge girder 11 of the viaduct 1 will be described.

First, as preparation, each member is prepared at a place (for example, a factory) different from the construction site. In preparation for the steel frame body 2 etc., first, bolt portions 23 are provided on the surface of the steel material 21 which is the lower surface when attached to the building 20 by welding a plurality of full screws at a predetermined interval. Then, the steel material 21 is covered with the heat insulating material 22 so that the tip end of the bolt portion 23 protrudes out of the heat insulating material 22.
Bolt holes are made in predetermined positions in the steel material for steel attachment 3 and the steel material 4. The steel material mounting steel material 3 can be manufactured only by drilling upper and lower bolt holes in a commercially available shaped steel or the like.

  After preparation of each member is completed, each member is transported to a construction site and attached. First, the reception bundle 51 (see FIG. 2) is provided at a predetermined position of the housing 5 of the building 20 so as to extend upward. Specifically, a steel material to be the reception bundle 51 is welded to the housing 5. Then, both ends of the steel frame 2 and the like 2 are fixed to the bundle 51.

After the installation of the steel frame 2 etc. is finished, the steel material mounting steel 3 is fixed to the steel frame 2 etc. Specifically, a plurality of upper bolt holes provided in the upper horizontal portion 32 of the steel material attachment steel material 3 are passed through the bolt portions 23 of each steel frame 2 and the like, and the nut 24 is tightened.
After the installation of the lumber mounting steel 3 is completed, the lumber 4 is attached to the lumber mounting steel 3. Specifically, the bolt hole provided in the lumber 4 is overlapped with the lower bolt hole of the lumber mounting steel 3, and the packing 43 is sandwiched therebetween, and the bolt 44 is inserted into the lower bolt hole Tighten. Thus, the fireproof roof 10 is installed in the space below the bridge girder 11 of the viaduct 1.

Conventionally, after using an angle steel to weld and attach an angle steel to the bolt portion 23, marking for attaching a sheet stat to the angle steel is performed, and after attaching a number of sheet stats to the angle steel, Although it was necessary to attach the sawing material, welding is not necessary for attaching the sawing material attachment steel 3, and it becomes an alternative to a plurality of seat stats only by attaching one pre-drilled bolt holed member Therefore, it is possible to omit the marking process and the individual seat stat mounting process.
Further, as in the seat stat, since the lumber is directly bolted to the lumber mounting steel 3 without interposing a member fitted and attached to the steel, the strength of the roof can be enhanced.

As mentioned above, although this invention was concretely demonstrated based on embodiment, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the summary.
For example, in the above embodiment, the bolt portion 23 is shortened because the lower surface of the steel frame 2 or the like and the upper surface of the separation material attachment steel 3 are in contact with each other. It may be long enough to be suspended away from the
Moreover, in the said embodiment, although the steel frame body etc. were used as the structural member of the building 20, when the steel frame as a structural member of a viaduct is arrange | positioned in the space of the bridge girder 11 lower part, using it The material mounting steel 3 may be attached.
In the above embodiment, although the steel frame body 2 and the like are fixed only to the frame 5 of the building 20, one (upper) end of the reinforcing steel material 6 is fixed to the elevated bridge 1 as shown in FIG. At the same time, the fireproof roof 10 may be reinforced by fixing the other (lower) end portion of the reinforcing steel material 6 to the steel frame 2 or the like.
Further, as shown in FIG. 4, a suspended ceiling 7 may be provided below the fireproof roof 10.

  Moreover, in the said embodiment, although the fireproof roof 10 was comprised using the laminated material 4 in which the backing material 42 was provided in the lower surface, the waterproof roof by steel frame etc. 2, the laminated material attachment steel materials 3, and the folding plate 41 has already been done. If provided, as shown in FIG. 5, the existing waterproof roof may be a fireproof roof by sandwiching the backing material 42 from below with a new folded plate 46.

DESCRIPTION OF SYMBOLS 20 Building 10 Fireproof roof 1 Viaduct 11 Bridge girder 12 Beam 13 Column 2 Steel frame body etc. 21 Steel material 22 Heat insulation material 23 Bolt part 24 Nut 3 Bonding material mounting steel 31 Vertical part 32 Upper horizontal part 33 Lower horizontal part 4 Bonding material 41, 46 Folded plate 42 Backing material 43 Packing 44 Bolt 45 Nut 5 Body 51 Receiving bundle 6 Reinforcement steel 7 Suspended ceiling

Claims (2)

It is fireproof roof of building provided in space under bridge girder of viaduct ,
A bolt portion depending from the underside of the viaduct or the lower surface of the frame of the building;
Bolt holes on the upper surface with to such a rod-shaped is formed, the bolt portion by being a nut fastened while being threaded through the bolt hole, and parallel with each other by opening the following intervals 900mm below the previous Kimukuro body With multiple steel installation steels, arranged as
Lower surface forms the covered plate with a heat insulating material, comprising pre SL and a plurality of roofing material roofing material which is fixed to the mounting steel, a,
A plurality of first holes are formed on the lower surface along the axial direction at predetermined intervals on the lower surface,
In the lumber, a plurality of second holes are respectively formed at predetermined positions, and a screw or a bolt is passed through the first hole and the second hole while being fastened to the lower surface of the lumber mounting steel material. fireproof roof and said that you have been fixed. The fireproof roof according to claim 1, wherein a reinforcing steel material is provided between the bridge and the viaduct .

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