JP2020183683A - Roof structure of fire-proof building - Google Patents

Abstract

To mainly make it possible to construct roof material placing and waterproof construction to a roof of a fire-proof building by the same worker.SOLUTION: The present invention relates to roof structure of a fire-proof building 1 where a fire resistance roof material 4 is placed on a roof structure beam 3 and water proof is subjected to the roof material 4. The roof material 4 is the roof panel 15 where a fire resistance sheathing roof board 12, a waterproof sheet 13, and a roof finishing material 14 are mounted on a roof frame 11. The roof panel 15 is fixed from under side to roof panel fixtures 16, 17 mounted on the roof structure beam 3. The roof frame 11 has a pair of parallel common rafter receiving beam 21 and several pieces of common rafters 22 in the roof panel 15. The sheathing roof board 12 and the roof finishing material 14 are overlapped to have a shorted width dimension w1 than the roof frame 11. The waterproof sheet 13 is sandwiched between the sheathing roof board 12 and the roof finishing material 14 to have a longer width dimension W3 than the roof frame 11.SELECTED DRAWING: Figure 1

Description

The present invention relates to a roof structure of a fireproof building.

A fireproof building has a roof structure in which a fire-resistant roofing material is laid on a roof structure beam provided at the upper part of the building body and the roofing material is waterproofed (for example, a patent). Refer to Documents 1 and 2).

As the roofing material of a fireproof building, an ALC plate (lightweight cellular concrete plate) having both a function as a structural material for supporting the load of the roof and a function as a fireproof material is used.

Japanese Unexamined Patent Publication No. 2-248555 Japanese Unexamined Patent Publication No. 5-148929

However, the roof structure of a fireproof building using the ALC plate as the roof material has the following problems.

That is, since the laying of the ALC plate is an aerial work that is performed in an unstable state by riding on the roof structure beam, the work must be done by a skilled worker such as a jumper who has the skill to handle heavy objects in the aerial work. I can't.

In addition, waterproofing work for ALC plates (for example, sheet waterproofing) requires that the joints of the sheets be firmly bonded together without any gaps, which requires special skill and the number of installers is limited. (Currently, only construction shops certified by sheet waterproofing companies are the contractors).

In this way, when using the ALC plate for the roofing material of a fireproof building, two different types of special skills are required for laying the ALC plate and waterproofing, and the workers are different. There was a problem such as.

Therefore, an object of the present invention is mainly to solve the above-mentioned problems.

In order to solve the above problems, the present invention
Roof structure of a fireproof building A roof structure of a fireproof building in which a fireproof roofing material is laid on a beam and the roofing material is waterproofed.
The roofing material is a roof panel in which a fire-resistant field board, a tarpaulin, and a roof finishing material are previously assembled in order from the bottom on the roof frame.
The roof panel is characterized in that it is fixed from below to a roof panel fixing bracket attached to the roof structure beam.

According to the present invention, according to the above configuration, the same worker can perform the laying of the roofing material and the waterproof construction on the roof of the fireproof building.

It is a vertical cross-sectional view which looked at the roof structure of the fireproof building which concerns on this embodiment from the side. (A) is a plan view showing the state of the roof structure beam of FIG. 1, and (b) is a layout view of the roof structure beam (wife beam and intermediate beam) seen from the side of (a). It is a perspective view which shows the state which laid the roof panel as a roofing material on the roof structure beam (not shown) of FIG. It is a perspective view which shows the roof frame of the roof panel of FIG. It is a perspective view which shows the state which the field board was attached on the roof frame of FIG. It is a perspective view which shows the state which attached the waterproof sheet on the field board of FIG. It is a perspective view which shows the state which attached the roof finishing material on the waterproof sheet of FIG. It is a figure which shows the roof panel fixing metal fitting (inner fixing metal fitting). Of these, (a) is a plan view, (b) is an end view, and (c) is a side view. It is a figure which shows the roof panel fixing metal fitting (outer fixing metal fitting). Of these, (a) is a plan view, (b) is an end view, and (c) is a side view. It is a figure which shows the state which the roof panel is fixed to the roof panel fixing metal fitting on the indoor side from the lower side (vertical sectional view seen from the side). It is a construction drawing following FIG. It is a construction drawing following FIG. It is a construction drawing (completed state) following FIG. It is a figure which shows the state which the roof panel is fixed to the roof panel fixing metal fitting on the outer wall side from the lower side (vertical sectional view seen from the side). It is a construction drawing following FIG. It is a construction drawing following FIG. It is a construction drawing following FIG. It is a construction drawing (completed state) following FIG. It is the figure which partially broke the roof structure of the fireproof building which concerns on the comparative example, and is the perspective view which shows the laying state of the ALC plate. It is a partially enlarged perspective view which shows the state which made waterproof construction on the ALC plate of FIG. 19 and was seen from the angle different from FIG.

Hereinafter, the present embodiment will be described in detail with reference to the drawings.
1 to 20 are for explaining this embodiment.

<Structure> The configuration will be described below.

As shown in FIG. 1, the fireproof building 1 has a roof by laying a fireproof roofing material 4 (FIG. 3) on a roof structure beam 3 (FIG. 2) provided on the upper part of the building body 2. It has a roof 5 (roof structure) having a structure in which the material 4 is waterproofed.

Here, the fireproof building 1 is a building having a fireproof structure required for an apartment house or a house in a fireproof area. For example, a land with a small site area or a city with a high building coverage ratio or land price. It is applied to three- and four-story buildings that are often found in the land of the department. An outer wall 6 is installed on the outer surface of the building body 2.

The roof structure beam 3 is a beam provided on the upper part of the building body 2 in order to form the roof 5 of the fireproof building 1. In this embodiment, the roof 5 has a rectangular shape in a plan view, and as shown in FIG. 2, the roof structure beam 3 includes a pair of girder beams along the long side of the rectangular roof 5 in a plan view. It has a pair of end beams along the short side of the building body 2 and one or more intermediate beams parallel to the end beams. The end beam and the intermediate beam are installed at approximately the same distance as the roof material 4 in the longitudinal direction of the girder beam, and the roof material 4 is mainly attached to the end beam and the intermediate beam. There is. However, the shape of the roof 5 and the arrangement and configuration of the roof structure beams 3 are not limited to this.

As shown in FIG. 1, the roof structure beam 3 has, for example, a web portion 3a which is a vertical surface and upper and lower flange portions 3b which are located at upper and lower ends of the web portion 3a and are horizontal surfaces. Shaped steel is used.

The roofing material 4 has a function that can be used in place of the existing ALC plate 7 (lightweight cellular concrete plate, FIGS. 19 and 20). The new roofing material 4 and the waterproofing of the roofing material 4 will be described later.

The roof 5 is required to have a high fireproof structure similar to that of the building body 2 of the fireproof building 1. The roof 5 has a substantially horizontal surface as a whole (however, it can have a slight drainage gradient).

Then, this embodiment can be provided with the following configuration.

(1) The roofing material 4 is formed on a roof frame 11 as shown in FIG. 4, a fire-resistant field plate 12 as shown in FIG. 5, a tarpaulin 13 as shown in FIG. 6, and a waterproof sheet 13 as shown in FIG. The roof panel 15 is such that the roof finishing material 14 is assembled in advance from the bottom.
The roof panel 15 is fixed from below to the roof panel fixing brackets 16 and 17 (FIGS. 8 and 9) attached to the roof structure beam 3 (FIGS. 10 and 14).

Here, the roof frame 11 is a frame body having a substantially rectangular shape in a plan view as shown in FIG. The roof frame 11 will be described later.

The field board 12 is a structural material having a substantially rectangular shape in a plan view that constitutes the surface of the roof 5, and as shown in FIG. 5, one or a plurality of the field boards 12 are attached side by side on the roof frame 11. For the field board 12, for example, a hard wood piece cement board having fire resistance and strength can be used. Then, for example, by setting the thickness of the hard wood piece cement board to 18 mm and making the roof frame 11 made of steel, the roof panel 15 can be made to satisfy the fire resistance 30 minutes performance. In addition, the ceiling board and heat insulating material on the floor directly below the fireproof building 1 can also be used as the fireproof material for the roof 5. Therefore, by appropriately combining these, the roof 5 can have the required fire resistance. However, the thickness of the field plate 12 is not limited to this, and can be appropriately set according to the required fire resistance and strength.

The waterproof sheet 13 (FIG. 6) is a sheet having waterproof properties, and a roofing material or the like can be used. The waterproof sheet 13 is a sheet material having a substantially rectangular shape in a plan view.

The roof finishing material 14 (FIG. 7) is a finishing member attached to the uppermost side of the roof panel 15, and for example, a waterproof steel plate such as a vinyl chloride steel plate or a fluorine steel plate can be used. The roof finishing material 14 is a member having a substantially rectangular shape in a plan view, and is installed in a single number or a plurality according to the size of the roof panel 15.

The roof panel 15 is a panel-shaped roofing material 4 used in place of the ALC plate 7. In the roof panel 15, the roof frame 11, the field board 12, the tarpaulin 13, and the roof finishing material 14, which are substantially rectangular in plan view, are vertically laminated with their sides aligned. The rectangular shape is a shape having a rectangular or square surface composed of four sides and four corners.

The roof panel fixing brackets 16 and 17 (FIGS. 8 and 9) are metal fittings for attaching the roof panel 15 to the roof structure beam 3. Two types of roof panel fixing brackets 16 and 17 are prepared depending on the position to be used. A plurality of roof panel fixing brackets 16 and 17 are provided, for example, at both ends and intermediate portions of the roof structure beam 3 serving as a wife beam or an intermediate beam (FIG. 2). The roof panel fixing brackets 16 and 17 will be described later.

Fixing from the bottom means mounting from the bottom to the top. Fixing tools 18 (or fastening fixing tools) such as bolts and nuts are used to fix the roof panel 15 to the roof panel fixing brackets 16 and 17.

(2) More specifically, as shown in FIG. 4, the roof panel 15 has a plurality of roof frames 11 erected and connected between a pair of parallel rafter receiving beams 21 and rafter receiving beams 21. It may have a rafter 22 and the like.
Further, as shown in FIG. 7, the field board 12 and the roof finishing material 14 have a width dimension W1 shorter than that of the roof frame 11 (width dimension W2), and both ends of the rafters 22 on the roof frame 11 It may be overlapped vertically at a position inside the roof.
Then, the waterproof sheet 13 has a width dimension W3 longer than the roof frame 11 (width dimension W2) and is sandwiched between the field plate 12 and the roof finishing material 14 so as to protrude outside the roof frame 11. It may be (width dimension W1 <width dimension W2 <width dimension W3).

Here, the rafter receiving beam 21 is a long member that constitutes a vertical frame portion (long side) of the roof frame 11. The pair of rafter receiving beams 21 are arranged at intervals according to the width of the roof panel 15. The rafter receiving beam 21 may be of any shape, but in this embodiment, L has a vertical surface portion 21a and a horizontal surface portion 21b extending outward from the lower end portion of the vertical surface portion 21a in the width direction of the roof frame 11. It is said to be a steel material with a cross section. The side surface portion 21b of the roof frame 11 is abutted and fixed to the roof panel fixing brackets 16 and 17.

The rafter 22 is a rod-shaped member that constitutes a horizontal frame portion (short side) and a center rail portion of the roof frame 11. The rafter 22 may be of any type, but in this embodiment, it is a square timber or a square tubular member (square steel pipe) having a rectangular cross section. The rafters 22 are attached between the vertical surface portions 21a of the pair of rafter receiving beams 21 so that the upper surface is higher than the upper end of the vertical surface portions 21a. At the end of the rafter 22, a mounting plate 22a (end plate) for mounting on the vertical surface portion 21a is installed. The mounting plate 22a is formed so as to extend below the lower surface of the rafters 22 (lower extension portion), and the portion of the lower extension portion below the lower surface of the rafters 22 is the vertical surface portion 21a of the rafter receiving beam 21. It is fixed to the top. The rafter receiving beam 21 and the rafter 22 are fixed by rivets, bolts, welding, or the like. As a result, the thickness of the roof panel 15 can be made equal to that of the existing ALC plate 7, and the roof panel 15 can be easily replaced with the ALC plate 7.

The width dimension W2 of the roof frame 11 is the sum of the length of the rafters 22 and the lengths of the side surface portions 21b at both ends of the rafters 22. The width dimension W1 of the field board 12 and the roof finishing material 14 can be structurally the same as the width dimension W2 of the roof frame 11, but as described above, it is shorter than the width dimension W2 of the roof frame 11. Is preferable. By installing the field board 12 and the roof finishing material 14 having the shortened width dimension W1 in the middle portion in the width direction of the roof frame 11, when the waterproof sheet 13 is not provided, both ends of the rafters 22 are exposed. become. At this time, the amount of exposure at both ends of the rafters 22 is preferably about the width of the flange portion 3b of the roof structure beam 3, respectively (FIG. 10).

The vertical dimensions of the field board 12 and the roof finishing material 14 (dimensions in the length direction of the rafter receiving beams 21) are formed longer than the roof frame 11, and are projected on one side of the roof frame 11. However, the vertical dimensions of the field board 12 and the roof finishing material 14 are not limited to this.

As shown in FIGS. 10 to 13 (particularly, FIG. 12), the width dimension W3 of the waterproof sheet 13 is such that when the roof panels 15 are installed side by side, the portions protruding outside the roof frame 11 overlap each other. To the length of. The overlapped portion of the waterproof sheet 13 is sealed by attaching the waterproof tape 23.

In this embodiment, as shown in FIG. 7, the vertical dimension of the waterproof sheet 13 (the dimension in the length direction of the rafter receiving beam 21) is formed longer than the field board 12 and the roof finishing material 14, and the roof frame 11 is formed. It is put out on both sides of. However, the vertical dimensions of the waterproof sheet 13 are not limited to this.

The fact that the field board 12 and the roof finishing material 14 are vertically aligned and overlapped means that the field board 12 and the roof finishing material 14 are stacked in a state where the positions of the peripheral edges are substantially the same. However, it is permissible to arrange the peripheral edges with a slight shift.

(3) As shown in FIG. 8 (FIG. 9), the roof panel fixing brackets 16 and 17 may have a mounting fixing surface 31 on which the roof panel 15 is mounted and fixed (also in FIGS. 1 and 2). See).
The mounting and fixing surface 31 is installed at a position higher than the fireproof coating material 32 (FIG. 1) attached to the roof structure beam 3, and the roof panel 15 is fastened and fixed at a position outside the roof structure beam 3. Bolt holes 33 may be formed.

Here, the mounting fixing surface 31 is a surface on which the roof panel 15 is placed on the upper surface to support the roof panel 15 from below, and at the same time, a surface for fixing the roof panel 15. The mounting fixed surface 31 is substantially horizontal. In this embodiment, the mounting and fixing surface 31 is designed to mount and fix the lateral surface portion 21b of the roof panel 15.

The fireproof coating material 32 is a fireproof coating material that is attached so as to wrap the outer periphery of the roof structure beam 3 in order to make the building a fireproof building 1. For the refractory coating material 32, for example, inorganic fiber felt or the like can be used. The refractory coating material 32 has a required thickness.

In order to install the mounting fixing surface 31 at a position higher than the fireproof coating material 32, the roof panel fixing brackets 16 and 17 have legs 34 for lifting the mounting fixing surface 31 upward. The legs 34 are formed longer than the thickness of the fireproof coating material 32, and are provided in pairs at both ends of the mounting fixing surface 31. The mounting fixing surface 31 is fixed to the roof structure beam 3 (such as the upper surface of the upper flange portion 3b) by welding or the like with a pair of legs 34.

The position outside the roof structure beam 3 is a position outside the projection range of the roof structure beam 3 when the roof structure beam 3 is viewed in a plane. Therefore, the leg portion 34 is substantially perpendicular to the width direction of the roof structure beam 3 (almost perpendicular to the longitudinal direction of the roof structure beam 3) from the base portion 34a (FIGS. 10 and 14) which is a fixed portion to the roof structure beam 3. It is extended laterally toward the outside (horizontally). Then, the mounting fixing surface 31 is provided on the tip end side of the leg portion 34 so that all or most of the mounting fixing surface 31 protrudes from the roof structure beam 3. The leg portion 34 has a lower edge portion on the base portion 34a side fixed at a position on one side of the upper flange portion 3b of the roof structure beam 3 over a length of about half the width of the flange portion 3b.

The bolt hole 33 is a mounting hole previously formed on the mounting fixing surface 31 for mounting a fixture 18 such as a bolt. The bolt hole 33 is formed on the mounting fixing surface 31 so that the position on the horizontal projection surface does not overlap with the roof structure beam 3. In this embodiment, the bolt hole 33 is formed at a position slightly overlapping with the refractory coating material 32 within a range that does not hinder the insertion of the bolt.

The roof panel fixing brackets 16 and 17 include a roof panel fixing bracket 16 (inner fixing bracket, FIG. 8) used on the indoor side and as shown in FIGS. 14 to 18 as shown in FIGS. 10 to 13. There is a roof panel fixing bracket 17 (outer fixing bracket, FIG. 9) used on the outer wall 6 side.

Of these, the roof panel fixing bracket 16 (inner fixing bracket) used on the indoor side has a size on which the mounting fixing surface 31 can simultaneously mount the adjacent lateral surface portion 21b of the adjacent roof panel 15 (FIG. FIG. 10).

On the other hand, in the roof panel fixing bracket 17 (outer fixing bracket) used on the outer wall 6 side, the mounting fixing surface 31 can mount the outer lateral surface portion 21b (only) of the roof panel 15 located on the outermost side. It is said to be large (Fig. 14).

2 for mounting and fixing the inner fixing brackets (roof panel fixing bracket 16, FIG. 10) so that the adjacent side surface portions 21b of the adjacent roof panels 15 can be fixed side by side at the same time. A type of bolt hole 33 (FIG. 8) is formed. The two types of bolt holes 33 are formed side by side in the width direction (horizontal direction) of the roof panel 15.

On the other hand, on the mounting fixing surface 31 of the outer fixing bracket (roof panel fixing bracket 17, FIG. 14), one type of bolt hole for fixing the outer lateral surface portion 21b of the roof panel 15 located on the outermost side is provided. 33 (FIG. 9) is formed.

The bolt holes 33 of the roof panel fixing brackets 16 and 17 are singular or plural (three in this embodiment) with respect to the longitudinal direction of the roof structure beam 3 to which the roof panel fixing brackets 16 and 17 are attached. ) May be provided.

Hereinafter, how to use the roof panel fixing brackets 16 and 17 will be specifically described.

(4) On the indoor side of the roof 5, as shown in FIGS. 10 to 13, the roof panel 15 may be simultaneously fixed to the roof panel fixing bracket 16 (inner fixing bracket) in an adjacent state.
A connecting field board 41 (FIG. 11) may be interposed between the adjacent field boards 12 of the adjacent roof panels 15.
The adjacent waterproof sheets 13 of the adjacent roof panels 15 may be attached to each other by the waterproof tape 23 in a state of being overlapped with each other.
A connecting roof finishing material 42 (FIG. 12) may be interposed between the adjacent roof finishing materials 14 of the adjacent roof panels 15.

Here, on the roof panel fixing bracket 16 (inner fixing bracket), the roof frame 11 (the lateral surface portion 21b of the adjacent rafter receiving beam 21 in the adjacent roof panel 15) of the adjacent roof panel 15 is placed and fixed at the same time in a side-by-side arrangement. (Fig. 10).

At this time, the roof frames 11 adjacent to each other are separated by the amount of the combined lateral surface portions 21b (width dimension). Further, the space between the adjacent field boards 12 and the space between the roof finishing materials 14 are wider than those between the roof frames 11. Therefore, in the separated portions between the adjacent field boards 12 and the roof finishing material 14, the connecting field boards 41 (FIG. 11) and the connecting roof finishing material 42 (FIG. 12) are attached to the roof frame 11 by the connecting work. It is installed so as to straddle the space between both sides of the. At this time, the connecting field board 41 is installed (FIG. 11), the waterproof sheet 13 is expanded, and the waterproof sheet 13 is attached and sealed with the waterproof tape 23, and then the connecting roof finishing material 42 is installed (FIGS. 12 and 13). ).

A roof cover 43 is attached from above between the roof finishing material 14 of the roof panel 15 and the connecting roof finishing material 42. A rising portion 44 having a return portion (return portion) is formed on the side edge portion of the roof finishing material 14 and the roof finishing material 42 of the joint. A substantially U-shaped roof rail 49 that holds the adjacent riser 44 from the inside is attached between the adjacent risers 44, and the roof cover 43 holds the adjacent riser 44 from the outside. The roof cover 43 can simultaneously accommodate the rising portion 44 (and the roof rail 49) adjacent to the inside, and the locking portions (returns) that are fitted and locked to the return portions on both sides of the roof cover 43. The receiving part) is formed. Further, locking portions (return portions) that are fitted and locked to the return portions are also formed on both sides of the roof rail 49.

(5) On the outer wall 6 side of the roof 5, the roof panel 15 may be fixed to the roof panel fixing bracket 17 (outer fixing bracket) as shown in FIGS. 14 to 18.
On the end portion of the roof frame 11 of the roof panel 15, the field plate 45 (FIG. 15) for the end portion may be installed side by side with the end portion of the field plate 12.
The end portion of the waterproof sheet 13 of the roof panel 15 may be expanded so as to cover the top of the field plate 45 for the end portion.
On the end of the waterproof sheet 13 of the roof panel 15, the roof finishing material 46 (FIG. 16) for the end may be installed side by side with the end of the roof finishing material 14.

Here, the roof frame 11 (the side surface portion 21b of the rafter receiving beam 21 in the roof panel 15), which is the outer edge of the roof panel 15, is placed and fixed on the roof panel fixing bracket 17 (outer fixing bracket) (FIG. 14). .. The field plate 45 for the end portion and the roof finishing material 46 for the end portion are considered to be approximately half the size of the joint field plate 41 and the roof finishing material 42 for the joint. The joint field board 41 and the joint roof finishing material 42 are installed in a state where they are exposed from the end of the roof frame 11. In the same manner as above, the roof cover 43 is placed between the roof finishing material 14 of the roof panel 15 and the roof finishing material 46 for the end portion, with the roof rail 49 interposed between the adjacent rising portions 44. It is attached from (FIGS. 16 and 17). As described above, the end treatment is performed.

Further, as shown in FIG. 18, between the roof finishing material 46 for the end portion and the upper end portion of the outer wall 6, the roof finishing material 46 for the end portion, the field plate 45 for the end portion, and the outer wall 6 Connecting parts such as a decorative cover 47 and a drainage material 48 are attached so as to cover the outer part of the roof panel 15 located on the side, the roof panel fixing bracket 16, the upper end portion of the outer wall 6, and the like, and the roof 5 The part on the outer wall 6 side is completed.

<Action> The action of this example will be described below.

The roof panel 15 used as the roof material 4 is manufactured at the factory. In the production of the roof panel 15, first, a plurality of rafters 22 are vertically attached between a pair of rafter receiving beams 21 to form a roof frame 11, and a field plate 12 is attached on the roof frame 11 to form a roof. It forms the basic structure of the panel 15. Further, the roof panel 15 is completed by attaching the waterproof sheet 13 on the field plate 12 and attaching the roof finishing material 14 on the waterproof sheet 13.

The completed roof panel 15 is mounted on a truck, transported to a construction site, lifted by a crane, and laid on the roof structure beam 3 of the building body 2 of the fireproof building 1.

The roof panel fixing brackets 16 and 17 are attached to the roof structure beam 3 in advance, and the fireproof coating material 32 is attached. The fireproof coating material 32 is appropriately cut so that the roof panel fixing brackets 16 and 17 are taken out of the fireproof coating material 32. Then, the roof panel 15 is installed on the roof panel fixing brackets 16 and 17 in a state of being floated from the fireproof coating material 32, and the rafter receiving beam 21 (horizontal surface portion 21b) of the roof panel 15 is attached to the roof panel fixing brackets 16 and 17. It is placed on the mounting fixing surface 31 of the above, and these are fixed from the lower side with a fixing tool 18 such as a bolt or a nut.

At this time, bolt holes 33 are formed in the roof panel fixing brackets 16 and 17 (placement fixing surfaces 31) so that the positions on the horizontal projection surface do not overlap with the roof structure beams 3. As a result, the roof panel fixing brackets 16 and 17 and the roof panel 15 can be easily fixed from below with the fixtures 18 such as bolts and nuts without interfering with the roof structure beam 3. You can easily tighten nuts, etc.).

For example, on the indoor side of the roof 5, the roof panel 15 is fixed by the fixture 18 by climbing a stepladder installed on the floor directly below. On the outer wall 6 side of the roof 5, the scaffolding around the building is used. As described above, it is possible to eliminate the unstable aerial work on the roof structure beam 3.

Then, when the roof panel 15 is fixed on the building body 2, on the indoor side of the roof 5, the roof panel 15 is used as a scaffold to ride on the roof panel 15, and a connecting field board 41, a connecting roof finishing material 42, or the like is used. The roof panels 15 are connected and waterproofed. The connecting work can be easily performed by fitting the connecting field board 41, the connecting roof finishing material 42, and the like and fixing them with drill screws. Further, the waterproof work can be easily performed by expanding the waterproof sheet 13 and attaching the waterproof tape 23.

On the outer wall 6 side of the roof 5, the end treatment and the fitting parts are attached by using the scaffolding on the outer periphery of the building in almost the same manner as described above. Edge processing and fitting parts can also be easily performed.

<Effect> According to this embodiment, the following effects can be obtained.

(Effect 1) In the roof structure of the fireproof building 1, as the roof material 4, the fire-resistant field board 12, the waterproof sheet 13, and the roof finishing material 14 are assembled in advance on the roof frame 11 in order from the bottom. A roof panel 15 that has been and is integrated may be used. This makes the roof panel 15 suitable for factory manufacturing.

The roof panel 15 can secure structural strength by the roof frame 11 and the field board 12, and by making the field board 12 fire resistant, fire resistance can be secured.

Therefore, it is possible to eliminate the need to use the ALC plate 7 (lightweight cellular concrete plate) as the roofing material 4 of the fireproof building 1. The roof panel 15 mainly composed of the roof frame 11 and the field board 12 can be finished lighter than the ALC plate 7. Further, since the roof panel 15 is not as brittle as the ALC plate 7, there are no problems such as chipping due to impact and generation of dust due to cutting or rubbing, so that careful handling is not required and handling is greatly facilitated. can do. Further, the roof panel 15 mainly composed of the roof frame 11 and the field board 12 can be structurally made much larger than the ALC plate 7. By increasing the size of the roof panel 15, the number of installation work of the roof panel 15 on the roof structure beam 3 and the labor required for the installation work can be significantly reduced, and the construction can be performed in a short time (or in a short period of time). Become.

Further, when the roof panel 15 is integrally attached with the waterproof sheet 13 and the roof finishing material 14, the roof panel 15 itself is in a state where most of the waterproof construction has already been performed. Therefore, after laying the roof panel 15 on the roof structure beam 3, it is sufficient to use the laid roof panel 15 as a scaffold and perform the remaining waterproof construction on a small portion between the roof panels 15. The waterproof construction between the roof panels 15 is also a light work of simply attaching the connecting field board 41, the tarpaulin 13, the roof finishing material 14, etc., so the waterproof construction performed when the ALC plate 7 is used ( This can be done much easier than in FIG. 20). In FIG. 20, a primer 51 is applied on the ALC plate 7, an insulating tape 52 is attached to the gap between the ALC plates 7, and the entire surface of the roof 5 and the wall around the roof 5 are waterproofed with a synthetic rubber sheet or the like. Since the sheet 53 is attached with the adhesive 54, special skill is required and it takes time and effort. Therefore, by using the roof panel 15 instead of the ALC plate 7, it is possible to eliminate the need for a specialized waterproofing contractor.

Such a roof panel 15 may be fixed from below to the roof panel fixing brackets 16 and 17 attached to the roof structure beam 3. As a result, after the roof panel 15 lifted by the crane is lowered onto the roof structure beam 3, the roof panel 15 is fixed to the roof panel fixing brackets 16 and 17 from below with fixtures 18 such as bolts and nuts. Since it is only necessary to do this, work at heights such as laying the ALC plate 7 (heavier than the roof panel 15) on the roof structure beam 3 in an unstable state as before. Can be eliminated. Specifically, the roof panel 15 can be easily fixed on the indoor side of the roof 5 simply by climbing a stepladder installed on the floor directly below, and the outer wall 6 side of the roof 5 uses the scaffolding on the outer periphery of the building. It is possible to easily perform the fixing work of the portion facing the outer wall 6. Therefore, the roof panel 15 can be easily fixed to the roof structure beam 3, and a skilled worker who has a skill in handling heavy objects can be eliminated in aerial work.

Further, the work of fixing the roof panel 15 to the roof structure beam 3 and the work of waterproofing the roof panel 15 after fixing can be continuously performed by the same worker (multi-skilled worker), and moreover, a special skill. Since it can be easily constructed in a short time only by general work without using, the loss (generation of free time) due to the replacement of two types of skilled workers as in the case of constructing ALC plate 7 is eliminated. It is possible to improve work efficiency and shorten the construction period. In addition, since there is no replacement of the two types of skilled workers, it is easy to set up the process in the field work.

(Effect 2) In the roof structure of the fireproof building 1, the roof panel 15 includes a pair of rafter receiving beams 21 in which the roof frame 11 is parallel, and a plurality of rafters 22 erected and connected between the rafter receiving beams 21. May have. As a result, a strong framework is formed by the rafter receiving beams 21 and the rafters 22, so that the large-sized roof panel 15 can be easily constructed.

For example, the roof panel 15 can be easily loaded up to the maximum size (for example, width 2.5 m × length 5.6 m) that can be loaded on a large truck under the condition that a large truck and a crane can be used. It can be made large. On the other hand, the maximum size of the ALC plate 7 is about 60 cm in width and 240 cm in length, and the roof panel 15 can be made much larger than the ALC plate 7.

Further, the field board 12 and the roof finishing material 14 have a width dimension W1 shorter than that of the roof frame 11, and are located inside the rafters 22 on the roof frame 11 and their peripheral edges are vertically positioned above and below each other. It may be aligned and overlapped. As a result, after fixing the roof panel 15 to the roof structure beam 3, it is possible to secure a space for waterproofing or the like between adjacent roof panels 15 or at the end of the roof panel 15. Further, by stacking the field board 12 and the roof finishing material 14 in a state where the positions of the peripheral edges are aligned vertically, the connecting field board 41 and the connecting roof finishing material 42 to be installed between the adjacent roof panels 15 can be stacked. The size and the size of the field plate 45 for the end and the roof finishing material 46 for the end to be installed at the end of the roof panel 15 can be made the same, and it is easy to handle and work.

The waterproof sheet 13 may have a width dimension W3 longer than that of the roof frame 11 and may be sandwiched between the roof material 4 and the roof finishing material 14 so as to protrude outside the roof frame 11. As a result, when the roof panel 15 is manufactured, the portion of the waterproof sheet 13 that protrudes from the field plate 12 and the roof finishing material 14 is rolled or folded so that the waterproof sheet 13 is contained within the range of the roof frame 11. The roof panel 15 can be easily handled without getting in the way, and after the roof panel 15 is fixed to the roof structure beam 3, the waterproof sheet 13 is expanded to the outside of the roof frame 11 so that the adjacent roof panels 15 and the roof panels can be handled easily. A waterproof sheet 13 can be easily laid on the end of the 15 to perform waterproofing work and the like.

(Effect 3) In the roof structure of the fireproof building 1, the roof panel fixing brackets 16 and 17 may have a mounting fixing surface 31 for mounting and fixing the roof panel 15 on the upper part. As a result, the roof panel 15 lifted by the crane is lowered onto the roof structure beam 3 and placed on the mounting fixing surface 31, and the roof panel 15 is fixed from below with the roof panel fixing brackets 16 and 17. As a result, the roof panel 15 can be installed on the roof structure beam 3.

Then, the mounting fixing surface 31 is installed at a position higher than the fireproof coating material 32 attached to the roof structure beam 3, so that the roof panel 15 supported by the mounting fixing surface 31 interferes with the fireproof coating material 32. Can be prevented from doing so.

Further, since the mounting fixing surface 31 has the bolt holes 33, the roof panel 15 can be accurately mounted on the mounting fixing surface 31 by using the bolt holes 33. Since the mounting fixing surface 31 has a bolt hole 33 at a position outside the roof structure beam 3, the roof panel 15 is fastened and fixed to the mounting fixing surface 31 from below with a fixture 18 such as a bolt or a nut. At that time, the fixture 18 can be attached without the roof structure beam 3 getting in the way.

(Effect 4) The roof panel 15 may be fixed to the roof panel fixing bracket 16 at the same time in an adjacent state. This allows the two roof panels 15 to be placed adjacent to each other. A connecting field board 41 may be interposed between the adjacent field boards 12 of the adjacent roof panels 15. As a result, the adjacent field boards 12 can be made continuous by the connecting field boards 41. The adjacent waterproof sheets 13 of the adjacent roof panels 15 may be attached to each other by the waterproof tape 23 in a state of being overlapped with each other. As a result, the joint portion can be waterproofed by the adjacent waterproof sheet 13. A connecting roof finishing material 42 may be interposed between the adjacent roof finishing materials 14 of the adjacent roof panels 15. As a result, the adjacent roof finishing materials 14 can be made continuous by the connecting roof finishing material 42, and the bonded portion of the waterproof sheet 13 can be hidden. As described above, the connecting process between the roof panels 15 can be easily performed.

(Effect 5) The roof panel 15 may be fixed to the roof panel fixing bracket 17. As a result, the roof panel 15 can be arranged on the outer wall 6 side of the roof 5. On the end portion of the roof frame 11 of the roof panel 15, the field plate 45 for the end portion may be installed side by side with the end portion of the field plate 12. As a result, the end portion of the roof frame 11 can be covered with the field plate 45 for the end portion at the portion of the roof 5 on the outer wall 6 side. The end portion of the waterproof sheet 13 of the roof panel 15 may be expanded so as to cover the top of the field plate 45 for the end portion. As a result, the field plate 45 for the end portion can be covered with the end portion of the waterproof sheet 13. On the end of the waterproof sheet 13 of the roof panel 15, the roof finishing material 46 for the end may be installed side by side with the end of the roof finishing material 14. As a result, the end portion of the waterproof sheet 13 can be covered with the roof finishing material 46 for the end portion. As described above, the edge treatment of the roof 5 can be easily performed.

1 Fireproof building 3 Roof structure beam 4 Roof material 5 Roof 5
11 Roof frame 12 Field board 13 Tarpaulin 14 Roof finishing material 15 Roof panel 16 Roof panel fixing bracket (inside fixing bracket)
17 Roof panel fixing bracket (outer fixing bracket)
21 Rafter receiving beam 22 Rafter 23 Waterproof tape 31 Mounting fixed surface 32 Fireproof coating material 33 Bolt hole 41 Connecting field board 42 Connecting roof finishing material 45 Ending field board 46 Ending roof finishing material W1 Width dimension W2 width dimension W3 width dimension

Claims (5)

Roof structure of a fireproof building A roof structure of a fireproof building in which a fireproof roofing material is laid on a beam and the roofing material is waterproofed.
The roofing material is a roof panel in which a fire-resistant field board, a tarpaulin, and a roof finishing material are previously assembled in order from the bottom on the roof frame.
The roof structure of a fireproof building is characterized in that the roof panel is fixed from below to a roof panel fixing bracket attached to the roof structure beam. The roof structure of the fireproof building according to claim 1.
In the roof panel, the roof frame has a pair of parallel rafter beams and a plurality of rafters erected and connected between the rafter beams, and the field board and the roof finishing material are the same. It has a width dimension shorter than that of the roof frame and is vertically aligned and overlapped at a position inside the both ends of the rafter on the roof frame, and the waterproof sheet has a width dimension longer than that of the roof frame. A roof structure of a fireproof building, which is sandwiched between the field plate and the roof finishing material so as to protrude outside the roof frame. The roof structure of the fireproof building according to claim 1 or 2.
The roof panel fixing bracket has a mounting fixing surface for mounting and fixing the roof panel.
The mounting fixing surface is installed at a position higher than the fireproof coating material attached to the roof structure beam, and a bolt hole for fastening and fixing the roof panel is formed at a position outside the roof structure beam. The roof structure of a fireproof building characterized by being. The roof structure of the fireproof building according to any one of claims 1 to 3.
The roof panels are simultaneously fixed to the roof panel fixing bracket in an adjacent state,
A connecting field board is interposed between the adjacent field boards of the adjacent roof panel.
The adjacent waterproof sheets of the adjacent roof panels are laminated with a waterproof tape in a state of being overlapped with each other.
A roof structure of a fireproof building, characterized in that a connecting roof finishing material is interposed between adjacent roof finishing materials of the adjacent roof panels. The roof structure of the fireproof building according to any one of claims 1 to 3.
The roof panel is fixed to the roof panel fixing bracket,
On the end of the roof frame of the roof panel, a field plate for the end is installed side by side with the end of the field plate.
The end of the tarpaulin of the roof panel is expanded so as to cover the field plate for the end.
A roof structure of a fireproof building, characterized in that a roof finishing material for the end portion is installed side by side with the end portion of the roof finishing material on the end portion of the waterproof sheet of the roof panel.