JPH0742740B2 - Fireproof structure of unit building - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a fireproof structure of a unit building suitable for use in a three-story or more building, such as an apartment, a hospital, a hotel, a boarding house, etc. Regarding

(Prior Art) Floor materials and girders of buildings with three or more floors for use in apartments, hospitals, hotels, boarding houses, etc. must have a fireproof structure with prescribed fireproof performance based on the Building Standards Act. . As a fireproof structure for this floor, a structure as shown in FIG. 4 has been conventionally known.

In this conventional structure, the boundary wall 01 divides the ceiling plate 02 and extends to the back of the ceiling, and the interior space 03 and the ceiling space 05 between the ceiling plate 02 and the floor plate 04 of the upper floor are also partitioned for each door. There is. The floor plate 04 and the boundary wall 10 are made of a refractory material, and the girder 06
Is fire-resistant coated by the fire-resistant coating material 07 and the floor board 04 by individually coating the fire-resistant coating material 07.
By individually coating the fireproof coating 09, the fireproof coating
It was fireproof coated with 09 and floorboard 04.

By the way, in covering the large beams 06 and the floor small beams 08 with the fireproof coating materials 07, 09, in addition to the sticking work as shown in FIG. In any case, girder 06 and floor girder 08
Was done individually against.

(Problems to be Solved by the Invention) However, as in the conventional fire-resistant structure for floors, the fire-resistant coating materials 07, 09 are individually applied to the large beam 06 and the floor beam 08.
There is a problem that covering with the cover requires a lot of materials and is extremely troublesome and troublesome. Furthermore, it is difficult to attach the fire-resistant coating materials 07 and 09 to all beams without gaps in the pasting work, and the fire-resistant coating material such as rock wool is different from other objects in the spraying work. It was difficult to apply fireproof coating to all the beams without gaps because they would easily peel off due to contact with the above.

Further, as shown in FIG. 4, when the girder 06 is fixed to the upper end of the pillar 010 and the boundary wall 01 is joined to the fireproof covering 07 of the girder 06, the fireproof covering 07 and the boundary are joined together. It becomes complicated and difficult to join with the wall 01.
When 01 and 01 intersect, there is a problem that the structure becomes complicated, such as the fact that part of the boundary wall 01 must be cut out.

(Means for Solving Problems) The present invention has been made for the purpose of solving the above-mentioned problems, and in order to achieve this object, according to the present invention, a floorboard of a lower floor building unit and The boundary wall that stands between the floor board of the upper-floor building unit is divided into an upper boundary wall that partitions the space above the ceiling and a lower boundary wall that partitions the interior space, and the ceiling plate of the lower-floor building unit is adjacent to it. Is laid continuously over the ceiling board of the above through the ceiling board, the large beam and the small beam are arranged in the space above the ceiling, and the floor board of the upper floor building unit is spread over the floor board of the adjacent building unit. Through, and continuously laid, the ceiling plate, the floor plate, and the boundary wall are formed of a fire-resistant material having a predetermined fire-resistant performance, the fire-resistant structure of the unit building floor of the lower-floor building unit The wall that stands between the surface and the ceiling above the ceiling The ceiling wall of the lower-floor building unit is divided into the upper boundary wall that partitions the back space and the lower boundary wall that partitions the indoor space, and the ceiling plate of the adjacent building unit is laid continuously over the ceiling plate of the adjacent building unit, A large beam and a small beam are arranged in a space above the ceiling formed between the ceiling plate of the lower-floor building unit and the floor plate of the upper-floor building unit, and the floor plate of the upper-floor building unit is used as the floor plate of an adjacent building unit. A means for constructing a fire resistant structure of a unit building is constructed by continuously laying a floor spanning board and forming the ceiling board, the floor board, and the boundary wall from a fire resistant material having a predetermined fire resistant performance.

(Operation) In the fireproof structure for a unit building according to the present invention, the ceiling plate is continuous in the horizontal direction, and the large beam and the small beam are arranged in the space above the ceiling formed between the ceiling plate and the floor plate. Since the floor plate and the ceiling plate are made of a refractory material having a predetermined fire resistance performance, the girders and the girders can be simultaneously fireproof-coated collectively by the ceiling plate and the floor plate.

In addition, fire protection is not applied directly to the girders and girders that are placed in the space above the ceiling and cannot be easily seen from outside,
Since the floor plate and the ceiling plate, which can be easily seen from outside the ceiling space, are provided with fire resistance, the fire resistant structure can be easily managed.

Further, since the boundary wall is divided into the upper boundary wall and the lower boundary wall by the ceiling plate, the fixed position of the upper boundary wall can be adjusted to a position where the beams and columns do not interfere.

In addition, since the boundary wall is made of a refractory material, even if a fire occurs from a certain indoor space, the lower boundary wall blocks the fire and the fire penetrates into the indoor space that separates the lower boundary wall. In addition to preventing the fire, even if the floor board or ceiling board is damaged and a fire intrudes into the space above the ceiling, the fire is blocked by the upper boundary wall and the fire above the ceiling wall is separated. It can also prevent entry.

(Examples) Examples of the present invention will be described in detail below with reference to the drawings.

In describing this embodiment, the fire resistant structure of the roof will be described by taking a three-story unit building as an example.

First, as shown in FIG. 1, the unit building of the embodiment is constructed by stacking units A in three upper and lower stages.

Each of these units A has a frame composed of a floor girder 1 and a floor girder 2, a ceiling girder 3 and a ceiling girder 4, and a column 5, and a floor plate 6, a ceiling plate 7, a wall plate (outer wall) It is a box-shaped member to which a plate 8, an inner wall plate 9, and a boundary wall 10) are attached. The first-floor unit A ₂ is installed on the foundation 11 and bolted to the foundation 11, and the roof plate 12 is installed on the uppermost third-floor unit A ₃ .

The first floor unit A ₁ , the second floor unit ₂ and the second floor unit A
The floor girder 1 of the upper unit A and the ceiling girder 3 of the lower unit A of the _second and third-floor units A ₃ are connected by bolts.

Further, as shown in FIG. 2 and FIG. 3, the floor girder 1 and the ceiling girder 3 are made of shaped steel and the floor girder 2
And the ceiling girders 4 are made of I-shaped steel, and the ceiling girders 3
And, on the lower surface of the ceiling beam 4, there is a rim fixing bracket 13
14 is fixed.

The floor board 6 is made of a refractory material having a fire resistance time of 1 hour or more (according to the JIS A 1304 fire resistance test method for building structures) such as a hard wood chip cement board having a thickness of 18 mm. Is fastened directly to the upper surface of. A floor crossing member 15 made of the same material as the floor plate 6 is provided in close contact with the floor plate 6 at the unit crossing portion of the floor plate 6.

The ceiling plate 7 is made of a refractory material such as a 25 mm thick asbestos calcium silicate plate having a fire resistance time of 1 hour or more (according to the JIS A 1304 fire resistance test method of the building structure portion), and the field edge 14 is It is fixed with tapping screws 16. A ceiling spanning plate 17 made of the same material as that of the ceiling plate 7 is provided in close contact with the ceiling plate 7 at the unit spanning portion of the ceiling plate 7.

That is, in the unit A on the same floor, floor plate 6 and ceiling plate 7
Are continuously provided on the same plane via a floor spanning plate 15 and a ceiling spanning plate 17.

Therefore, between the first-floor unit A ₁ and the second-floor unit ₂ and between the second-floor unit A ₂ and the third-floor unit A ₃ , the ceiling plate 6 and the ceiling plate 7 form an under-ceiling space 21, and this ceiling Back space 21
The floor girders 1 and floor girders 2 of the upper unit A and the ceiling girders 3 and ceiling girders 4 of the lower unit A are arranged in the.

The outer wall plate 8 is made of, for example, a fireproof material having a fireproof time of 2 hours or more (according to the JIS A 1304 fireproof test method of a building structure portion) such as an ALC plate having a thickness of 100 mm. Has been concluded. A refractory material is caulked on the unit crossing portion of the outer wall plate 8, and the joints of the outer wall plate 8 and the floor plate 6, and the outer wall member 8 and the ceiling plate 7 are filled with rock wool 19,20. It is closely adhered to that.

The boundary wall 10 divides a space for each house, and is divided into an upper boundary wall 101 that partitions the ceiling space 21 in the ceiling plate 7 and a lower boundary wall 102 that partitions the indoor space 27.

The upper boundary wall 101 is, for example, a laminated material of 30 mm thick rock wool felt and 8 mm thick aluminosilicate fiber or a 25 mm thick asbestos-calcium calcium plate, etc., with a fire resistance time of 1 hour or more (JIS A 1304 It is made of a refractory material (according to the fire resistance test method for a part) and is erected between the ceiling spanning plate 17 and the floor spanning plate 15. Further, the upper boundary wall 101 is fixed to the floor girder 1 and the ceiling girder 3, respectively, and the upper part wall 101 fixed to the floor girder 1 of the upper unit A in a state where the unit A is fastened vertically. And the upper boundary wall 101 fixed to the ceiling girder 3 of the lower unit A are continuous with each other to partition the ceiling space 21 formed between both units A.

In addition, the lower boundary wall 102, 12mm thick gypsum board 22 is fixed to one side of the stud 26 made of lightweight steel frame, the other side is a 30mm thick glass fiber-containing gypsum board 23 fireproof time It has a fire resistance of 1 hour or more (according to the JIS A 1304 fire resistance test method for building structures). This lower boundary wall 102 is erected on both sides of the ceiling spanning plate 17 and has studs 26. It is fixed to a fireproof coated pillar 5.

The inner wall plate 9 is made of a non-combustible material such as gypsum board, and is fixed to the pillar 5 covered with fireproofing via a frame 24.

In addition, the inner surface of the inner wall plate 9 has a heat insulating material such as glass wool.
25 is installed.

Next, the operation of the embodiment will be described.

As explained above, between the first floor unit A ₁ and the second floor unit A ₂ and between the second floor unit A ₂ and the third floor unit A ₃ , the floor board 6 of the upper unit A and the lower unit A are Since the ceiling space 7 is formed with the ceiling board 7, and the floor board 6 and the ceiling board 7 are made of a refractory material,
Floor girders 1 and girders 2 of the upper unit A and ceiling girders 3 of the lower unit A arranged in the space above the ceiling 21.
The ceiling beam 4 and the ceiling beam 4 are simultaneously fireproof coated with a fireproof material, and when viewed as a floor as a whole, this floor has a fireproof time of 1 hour or longer (JIS A 1304 fireproof test method for building structures). The fire resistance performance of (1) is secured.

Therefore, by tightly connecting the units A to each other, the floor girders 1 and the floor girders 2 of the upper unit A and the ceiling girders 3 and the ceiling girders 4 of the lower unit A are fireproof coated as they are. As described above, the material can be reduced and the labor can be saved as compared with the case where the beams are individually fire-resistant coated.

Further, since the floor plate 6 and the ceiling plate 7, which can be easily seen from the outside of the ceiling space 21 after the unit building is completed, are fireproofed, it is easy to manage the fireproof structure.

Further, since the indoor space 27 is partitioned by the lower boundary wall 102 for each door, even if a fire occurs from the indoor space 27 of a certain door, the lower boundary wall 102 shuts off the fire and moves to the adjacent door next to it. It can prevent a fire from entering.

Further, since the ceiling space 21 is partitioned by the upper boundary wall 101 for each door, the floor plate 6 or the ceiling plate 7 is damaged at a certain door in the event of a fire, and the interior space 27 is changed to the ceiling space 21. Even if a fire breaks in, the upper boundary wall 101
The fire can be blocked by this, and the fire can be prevented from entering the door next to the ceiling space 21.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and the present invention can be applied even if there is a design change or the like within a range not departing from the gist of the present invention. included.

For example, in the embodiment, the fire resistant structure is applied to a three-story unit building, but it may be applied to a one-story, two-story or four-story or more unit building, or a steel frame other than the unit building. It may be applied to buildings and the like.

Further, the floor plate and the ceiling plate may be made of a refractory material other than that of the embodiment as long as it has a predetermined fire resistance performance, and a sound insulating sheet or a heat insulating material may be added in addition to the refractory material.

(Effects of the Invention) As described above, in the fireproof structure of the unit building of the present invention, the means for simultaneously applying fireproof coating to the girders and girders at the same time by the ceiling plate and the floor plate is employed. In addition, compared with the case where the large beam and the small beam are individually covered, the effect that the material can be reduced and the work time can be shortened can be obtained.

Further, since the ceiling plate and the floor plate, which can be easily seen from outside the ceiling space, are provided with fire resistance, the fire resistant structure can be easily managed.

Furthermore, since the boundary wall is divided into the upper boundary wall and the lower boundary wall by the ceiling plate, there is an effect that the installation position of the upper boundary wall can be adjusted to a position where beams and columns do not interfere. can get.

Further, since the boundary wall is formed of the refractory material, even if a fire occurs, the fire can be blocked by the boundary wall to prevent the fire from entering the space adjacent to the boundary wall.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a unit building of an embodiment of the present invention, FIG. 2 is a vertical sectional view showing a fireproof structure of a floor in the unit building of the embodiment, and FIG. 3 is a main portion of the embodiment structure. FIG. 4 is a vertical sectional view showing a fire resistant structure of a floor in a conventional building. 1 ... Floor girder (girder) 2 ... Floor girder (girder) 3 ... Ceiling girder (girder) 4 ... Ceiling girder (girder) 6 ... Floor board 7 ... Ceiling board 10 ... Boundary wall 101 ... Upper part wall 102 ... Lower boundary wall 21 ... Ceiling space 27 ... Indoor space

Claims (1)

[Claims] 1. A partition wall standing between a floorboard of a lower-floor building unit and a floorboard of an upper-floor building unit is divided into an upper partition wall that partitions an overhead space and a lower partition wall that partitions an indoor space. The ceiling plate of the lower-floor building unit is continuously laid on the ceiling plate of the adjacent building unit via the ceiling spanning plate, and a large beam and a small beam are arranged in the space above the ceiling, A floorboard is laid continuously on the floorboard of an adjacent building unit via a floor spanning board, and the ceiling board, the floorboard, and the boundary wall are formed of a fireproof material having a predetermined fireproof performance. Fireproof structure of unit building.