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Regulations on local setting of fire compartments in different buildings


2015-01-27


Table 5.1.7 Fire resistance rating, maximum allowable number of floors and maximum allowable building area of ​​fire compartments for civil buildings


5.1.7 The fire resistance class, maximum allowable number of floors and maximum allowable building area of ​​fire compartments of civil buildings shall comply with the provisions in Table 5.1.7.
 

Table 5.1.7  Fire resistance class, maximum allowable number of floors and maximum allowable building area of ​​fire compartments for civil buildings

fire-resistant level

The maximum number of layers allowed

The maximum allowable building area of ​​the fire compartment ( m 2 )

Remark

First and second level

 According to Article 1.0.2 of this specification

2500

1.  For audience halls of gymnasiums and theaters, and exhibition halls of exhibition buildings, the maximum allowable building area of ​​the fire compartments can be appropriately relaxed.
2.  Children's playrooms and children's playrooms in nurseries and kindergartens should not have more than  three  floors or be located on floors four or above or in underground or semi-underground buildings (rooms).

Level three

floors

1200

1.  Nursery, kindergarten children's rooms and children's play halls and other children's activity places, buildings for the elderly, hospitals, and nursing homes for inpatients should not exceed 2 floors or be  set  on three or more floors or underground or semi-underground buildings ( indoor.
2.  Shops, schools, cinemas, theaters, auditoriums, canteens, and vegetable markets should not exceed  two  floors or be located on three or more floors.

Level 4

floors

600

Schools, canteens, vegetable markets, nurseries, kindergartens, buildings for the elderly, hospitals, etc. should not be located on the second floor.

Underground and semi-underground buildings (rooms)

500

-

Note: When an automatic fire extinguishing system        is installed in a building , the maximum allowable building area of ​​the fire compartment can be increased by 1.0 times according to the provisions in this table. When setting locally, the increased area can be calculated as 1.0 times of the local area.

5.1.8 The fire resistance class of underground and semi-underground buildings (rooms) shall be Class I; the fire resistance class of important public buildings shall not be lower than Class II.

5.1.9 When openings connecting the upper and lower floors such as escalators and open stairs are set in a multi-storey building, the area of ​​the fire compartment shall be calculated based on the superimposed area of ​​the connecting upper and lower floors; .7, fire compartments shall be divided.

5.1.10 When an atrium is set in a building, the area of ​​the fire compartment shall be calculated based on the superposition of the connected area of ​​the upper and lower floors; when the maximum allowable building area of ​​one fire compartment is exceeded, the following provisions shall be met:

1 Class A fire doors and windows that can be closed by themselves shall be arranged at the openings where the rooms communicate with the atrium;

2 Class A fire doors or fire shutters shall be installed in the passage halls and passages connected with the atrium; the fire doors or fire shutters shall be able to automatically close or fall in case of fire. The setting of fire shutters shall comply with the provisions of Article 7.5.3 of this code;

3 The atrium shall be provided with smoke exhaust facilities according to the provisions of Chapter 9 of this code.

5.1.11 The fire compartments shall be separated by firewalls. When it is really difficult to use a firewall, fire separation facilities such as fire shutters can be used for separation. When fire shutters are used, the provisions in Article 7.5.3 of this code shall be complied with.

5.1.12 When the above-ground store business hall and the exhibition hall of the exhibition building meet the following conditions, the maximum permissible building area of ​​each fire compartment shall not exceed 10,000m2:

1 Installed in single-storey buildings with Class I or II fire resistance or on the first floor of multi-storey buildings;

2 According to the provisions of chapters 8, 9 and 11 of this code, automatic sprinkler system, smoke exhaust facilities and automatic fire alarm system shall be installed;

3 The interior decoration design complies with the relevant provisions of the current national standard "Code for Fire Protection of Building Interior Decoration Design" GB 50222.

5.1.13 Underground shops shall meet the following requirements:

1 The business hall should not be set up on or below the third floor of the basement;

2 Commodities whose fire hazards belong to Category A and B storage items should not be operated and stored;

3 When there is an automatic fire alarm system and an automatic fire extinguishing system, and the interior decoration of the building complies with the relevant provisions of the current national standard "Code for Fire Protection Design of Building Interior Decoration" GB 50222, the maximum allowable building area of ​​each fire compartment in the business hall can be increased up to 2000m2;

4. Smoke prevention and smoke exhaust facilities should be installed;

5 When the total construction area of ​​the underground store is greater than 20000m2, it shall be separated by a firewall without openings for doors and windows. When adjacent areas really need to be partially connected, the following measures should be taken for fire separation:

1) Outdoor open spaces such as sunken squares. The setting of the outdoor open space shall be able to prevent the spread of fire in adjacent areas and facilitate safe evacuation;

2) Fire compartment. The wall of the fire compartment shall be a solid firewall, and normally open Class A fire doors that can be closed by themselves in case of fire are respectively installed in the adjacent areas of the compartment;

3) Evacuation aisle. In addition to complying with the relevant provisions of the current national standard "Code for Design of Fire Prevention of Civil Air Defense Engineering" GB 50098, the walls on both sides of the escape corridor should be solid firewalls, and the walls at the part of the connection should be respectively set up to be able to close automatically in case of fire. Normally open Class A fire doors;

4) Smoke-proof stairwell. The doors of the smoke-proof stairwell and the front room shall be normally open Class A fire doors that can be closed automatically in case of fire.

5.1.14 Song and dance halls, video halls, nightclubs, projection halls, karaoke halls (including restaurants with karaoke functions), entertainment halls (including electronic entertainment halls), saunas (not including bathing parts), Internet cafes and other singing and dancing entertainment projections Amusement places should be arranged on the first, second or third floors of buildings with first- and second-level fire resistance, and should not be arranged on both sides or ends of pocket walkways.

5.1.15 When singing and dancing halls, video halls, nightclubs, projection halls, karaoke halls (including restaurants with karaoke functions), entertainment halls (including electronic entertainment halls), saunas (not including bathing parts), Internet cafes and other singing and dancing entertainment When the screening and entertainment places must be arranged on both sides or at the end of the bag-shaped walkway, the distance from the evacuation door of the farthest room to the nearest safety exit should not be greater than 9m. When it must be arranged on the first floor, second floor or other floors other than the third floor in the building, the following requirements should also be met:

1 It should not be arranged on the second floor underground or below. When it is arranged on the basement floor, the height difference between the ground floor of the basement floor and the floor of the outdoor entrance and exit shall not be greater than 10m;

2 The construction area of ​​a hall or room shall not be greater than 200m2, and shall be separated from other parts by non-combustible partition walls with a fire resistance rating of not less than 2.00h and non-combustible floors with a fire resistance rating of 1.00h. Set up Class B fire doors;

3 The smoke prevention and exhaust facilities shall be arranged according to Chapter 9 of this code.

Excerpts from high regulations

3 Building classification and fire resistance class

3.0.1 High-rise buildings should be classified according to their nature of use, fire hazard, difficulty of evacuation and fighting, etc. And should comply with the provisions of Table 3.0.1. 

                                                 Building Classification 

name

one type

Class II

residential building

Residences with 19 floors and above (19F )

10F18 for residential buildings with  tenth to eighteenth floors

public building

 

 

 

 

 

 

 

 

1.     Hospital

2.     High-end hotels

3.     Commercial buildings, exhibition buildings, comprehensive buildings, telecommunication buildings, financial and financial buildings with abuilding area of ​​more than 1000m2 on any floor of the building height exceeding 50m or 24m or more

4.     Commercial and residential buildingswith a construction area of ​​more than 1500m2 on any floor of the part with a building height exceeding 50m or 24m

5.     Radio and TV buildings at the central and provincial levels (including cities with separate plans)

6.     Power dispatching buildings at the network bureau level and provincial level (including cities with separate plans)

7.     Provincial (including cities with separate plans) postal buildings and disaster prevention command and dispatch buildings

8.     Libraries and bookstores with acollection of more than 1 million volumes

9.     Important office buildings, scientific research buildings, archives buildings

10. Teaching buildings with a building height exceeding 50m and ordinary hotels, offices, scientific research buildings, archives buildings, etc.

1Commercial and residential buildings, exhibition buildings, comprehensive buildings, telecommunication buildings, financial and financial buildings, commercial and residential buildings, libraries, and stacks other than Class I buildings.

11. 2 Postal buildings below the provincial level, disaster prevention command and dispatch buildings, electric power dispatch buildings, radio and television buildings

12. Teaching buildings with a building height of no more than 50m and ordinary hotels, offices, scientific research buildings, archives buildings, etc.

 

 


3.0.4 The fire resistance rating of Class I high-rise buildings shall be Class I, and that of Class II high-rise buildings shall not be lower than Class II.

The fire resistance rating of the podium shall not be lower than Class II. The fire resistance rating of the basement of a high-rise building shall be Class I.

5.1 Fire and smoke compartments

5.1.1 Firewalls shall be used to divide fire compartments in high-rise buildings, and the maximum building area allowed for each fire compartment shall not exceed the provisions in Table 5.1.1.

The maximum building area allowed for each fire compartment

 

Building category

Building area of ​​each fire compartment (m 2 )

first class building

1000 square meters

Class II building

1500 m2

basement

500 square meters

 

 Note: 1 For the fire compartment equipped with automatic fire extinguishing system, the allowable maximum building area may be increased by 1.00 times according to this table; when the automatic fire extinguishing system is installed locally, the increased area may be calculated by 1.00 times the local area.

Note: 2 For the telecommunication building of Category I buildings, the allowable maximum area of ​​the fire compartment can be increased by 50% according to this table.

5.1.2 For commercial business halls, exhibition halls, etc. in high-rise buildings, if they are equipped with automatic fire alarm system and automatic gas fire extinguishing system , and are decorated with non-combustible or difficult-to-combustible materials, the maximum permissible building area of ​​the above-ground fire compartment is 4000m2 ; The allowable maximum construction area of ​​the fire compartment in the underground part is 2000m2.

5.1.3 When fire separation facilities such as firewalls are installed between a high-rise building and its podium, the maximum building area allowed for the fire compartment of the podium shall not exceed 2500m2. The area can be increased by 1.00 times.

5.1.4 When openings such as corridors, open stairs, escalators, and conveyor belts connecting upper and lower floors are provided in high-rise buildings, the upper and lower connected floors shall be regarded as a fire compartment, and the sum of the maximum allowable building areas shall not exceed the maximum building area specified in this code. The provisions of Article 5.1.1. When the upper and lower openings are equipped with separation facilities such as fire shutters or water curtains with a fire resistance rating greater than 3.00h, their areas may not be superimposed for calculation.

5.1.5 The fire compartment area of ​​the atrium of a high-rise building shall be calculated based on the superposition of the connected area of ​​the upper and lower floors. When the area of ​​more than one fire compartment is exceeded, the following provisions shall be met:

5.1.5.1 The doors and windows connecting the rooms with the atrium corridor shall be equipped with self-closing Class B fire doors and windows.

5.1.5.2 The halls and passages connected with the atrium shall be separated by Class B fire doors or fire shutters with a fire resistance rating greater than 3.00h.

5.1.5.3 The corridors on each floor of the atrium shall be equipped with an automatic sprinkler system.

5.1.5.4 An automatic fire alarm system shall be installed in each corridor of the atrium.

5.1.6 For aisles with smoke exhaust facilities and rooms with a clear height of no more than 6.00m, smoke-resistant vertical walls, partition walls or beams protruding from the ceiling not less than 0.50m shall be used to divide smoke-proof zones.

The construction area of ​​each smoke-proof partition should not exceed 500m2, and the smoke-proof partition should not cross the fire-proof partition.

6.1.1 There shall not be less than two safety exits for each fire compartment of a high-rise building. However, a safety exit may be provided if one of the following conditions is met:

6.1.1.1 18 floors and below, no more than 8 households per floor, a building area of ​​no more than 650m2, and a tower residence with a smoke-proof stairwell and a fire elevator.

6.1.1.2 Each unit on the 18th floor and below is equipped with an evacuation staircase leading to the roof. The stairs between units are connected through the roof. Firewalls are installed between units. The door is a Class A fire door. Unit dwellings where the width of the window wall and the height of the window sill wall are greater than 1.2m and the walls are non-combustible.

For more than 18 floors, each unit is provided with an evacuation staircase leading to the roof. The stairs of each adjacent unit above the 18th floor are connected through balconies or concave corridors (the roof may not be connected), and the 18th floor and below Firewalls are installed between some units, and the door is a Class A fire door, the width of the wall between the windows and the height of the window sill wall are greater than 1.2m, and the unit house is a non-combustible wall.

6.1.1.3 Except for the basement, when there are fire doors connected to the firewall between two adjacent fire compartments, and the sum of the building areas of the two adjacent fire compartments does not exceed the public buildings specified in Table 6.1.1.

Table 6.1.1 The sum of the maximum allowable building area of ​​the two fire compartments
 

Building category

The sum of the building area of ​​the two fire compartments (m 2 )

first class building

1400 m2

Class II building

2100 m2

 


Note: When the above two adjacent fire compartments are equipped with automatic sprinkler systems, the sum of the building areas of the two adjacent fire compartments shall still meet the requirements in this table.

6.1.2 For tower-type high-rise buildings, two evacuation stairs should be installed independently. When it is really difficult, scissor stairs can be installed, and the following requirements should be met:

6.1.2.1 The stairwell for scissors shall be a smoke-proof stairwell.

6.1.2.2 Between the steps of the scissors staircase, non-combustible wall partitions with a fire resistance rating of not less than 1.00h shall be arranged.