I, fire rating
01
plant
should not be less than two (high-rise, Category A / B, Category C + liquid, Category D + sparks / open flame / red-hot surfaces, special / valuable, oil-immersed transformer room, high-voltage distribution room, boiler room)
1) high-rise plant, Category A, B, the class of the plant fire-resistant grade should not be less than two.
2) the use or generation of class C liquid plant and have sparks, red-hot surfaces, open flames of class D plant, the fire resistance rating should not be less than two.
3) Buildings using or storing special valuable machines, meters, instruments and other equipment or goods shall have a fire resistance rating of not less than two.
4) the use or storage of special valuable machines, instruments, apparatus and other equipment or goods of the building, its fire resistance class should not be less than two.
5) oil-immersed transformer room, high-voltage power distribution equipment room fire resistance level should not be less than two.
Not less than three levels (single/multi-storey + Category C, multi-storey + D / E, built-up surface ≤ 300 + independent + Category A and B + single-storey, ≤ 500 + single-storey + Category C liquids, ≤ 1,000 + single-storey + sparks, red-hot surfaces, open flames of Category D, coal-fired + boiler room with a total evaporation capacity of ≤ 4t / h)
1) single, multi-storey Category C plant and multi-storey D and E plant fire-resistant rating should not be less than three levels.
2) independent single-story Category A and B plant with a floor area of not more than 300 square meters can be used for three levels of fire-resistant buildings.
3) the use or generation of C liquid plant and have sparks, red-hot surfaces, open flames of Category D plant, the fire-resistant level should not be less than two; when the floor area is not more than 500 square meters of single-story Category C plant or building area is not more than 1,000 square meters of a single-story Category D plant, the use of fire-resistant buildings of three levels.
4) coal-fired boiler room and the boiler's total evaporation is not greater than 4t / h, can be used in three fire-resistant buildings.
02
Warehouses
Level 2 (elevated, high-rise, Category A, multi-story + Category B, multi-story + storage of combustible liquids + Category C, grain silos)
1) elevated warehouses, high-rise warehouses, warehouses, Category A warehouses, multi-story Category B warehouses and multi-story Category C warehouses for storage of combustible liquids, the fire-resistance rating should not be less than two.
2) The fire resistance rating of grain silos shall not be less than Grade II.
Three levels (single-storey + Category B, single-storey + Category C, multi-storey + storage of combustible solids + Category C, multi-storey + D / E, grain cottage silos)
1) single-storey Category B warehouse, single-storey Category C warehouse, multi-storey storage of combustible solids of Category C warehouse and multi-storey D, E warehouses, the fire-resistance rating should not be less than three.
2) grain cottage warehouse fire resistance rating should not be less than three.
03
Civil buildings
Grade I (underground, a class of high-rise)
The fire-resistance rating of underground or semi-underground buildings (rooms) and a class of high-rise buildings should not be less than Grade I. The fire-resistance rating of the buildings should not be less than Grade I. The fire-resistance rating of the buildings should not be less than Grade II.
Grade II (single-multi-story important public ****, Category II high-rise)
The fire resistance rating of single- and multi-story important public **** buildings and Category II high-rise buildings should not be less than Grade II.
II. Adjustment of building components
01
Industrial buildings
1. Class A and B production or storage, should not be set in the underground or semi-underground.
2. A, B plant and A, B, C warehouses within the fire wall, the fire resistance limit should not be less than 4.0h.
3. One, two fire-resistant single-story plant (warehouse) columns, the fire-resistant limit should not be less than 2.50h and 2.00h respectively.
4. The use of automatic sprinkler system for full protection of the first level of fire-resistant single-story plant (warehouse) roof load-bearing structures. (Warehouse) of the roof load-bearing components, its fire resistance limit should not be less than 1.00h.
5. In addition to A, B warehouse and high-rise warehouses, the first and second level of fire-resistant buildings of non-load-bearing external walls, when the use of non-combustible wall, its fire resistance limit should not be less than 0.25h; when the use of flame-retardant wall should not be less than 0.50h.
4 floors and 4 floors of the first and second level of fire-resistant buildings, the fire-resistant limit should not be less than 0.50h.
Fire-resistant class D, E, and other fire-resistant buildings. Fire-resistant class D, class E above ground plant (warehouse) non-load-bearing external walls, when the use of non-combustible walls, the fire-resistant limit is not limited.
6. one-class fire-resistant single-storey, multi-storey plant (warehouse), when the automatic sprinkler system to fully protect the roof of the steel roof frame, the roof load-bearing components of the fire-resistant limit may not be less than 1.00h.
7. two-class fire-resistant classified plant (warehouse) room partition walls, when the use of non-combustible walls, the fire-resistant limit should be increased by 0.25h.
8. two-class fire-resistant classified multi-storey plant (warehouse), the fire-resistant limit of non-combustible wall. The fire-resistant limit of the floor slabs made of prestressed reinforced concrete in multi-storey factory buildings and multi-storey warehouses of fire-resistant class II shall not be less than 0.75h.
9. The fire-resistant limit of the roof panels of the roofs of the upper flat roofs of the first and second class fire-resistant class I and II factories (warehouses) shall not be less than 1.50h and 1.00h, respectively.
10. The roof panels of the roofs of the first and second class fire-resistant class I factories (warehouses) shall be made of non-combustible materials. The use of non-combustible materials. Roof waterproofing layer should be non-combustible materials, flame retardant materials; when the use of combustible waterproofing materials and laid on combustible, flame retardant insulation materials, waterproofing materials or combustible, flame retardant insulation materials should be used as a non-combustible materials as a protective layer.
02
Civil buildings
1. For civil buildings with a building height of more than 100m, the fire-resistant limit of the floor slabs shall not be less than 2.00h. The fire-resistant limit of the roof slabs of the overhanging flat roofs of buildings of fire-resistant level 1 and 2 shall not be less than 1.50h and 1.00h, respectively.
2. The partition walls of the rooms of buildings of fire-resistant level 2 shall be of fire-resistant type. The fire resistance limit of the partition wall of the room shall not be less than 0.75h; when the floor area of the room is not more than 100 square meters, the partition wall of the room can be used with the fire resistance limit of not less than 0.50h of the flame-retardant wall or the fire resistance limit of not less than 0.30h of the non-combustible wall.
The floor slabs of pre-stressed reinforced concrete used in Grade II fire-resistance-rated multi-story residential buildings shall have a fire-resistance limit of not less than 0.75h.
3. The ceiling of non-combustible materials used in Grade II fire-resistance-rated buildings shall have an unlimited fire-resistance limit.
4. three fire-resistant medical buildings, primary and secondary schools, teaching buildings, care facilities for the elderly and nurseries, kindergartens, children's rooms and children's playgrounds and other children's activities of the ceiling, should be used non-combustible materials; when the use of refractory materials, the fire-resistant limit of its fire resistance should not be less than 0.25h.
5. two or three fire-resistant buildings in the foyer, the walkway ceiling should be Use of non-combustible materials.
6. Teaching buildings, cafeterias, food markets can be located in the first or second floor of the three fire-resistant buildings; four fire-resistant buildings on the first floor. Elementary school building of the main teaching rooms shall not be set in more than 4 floors, secondary school building of the main teaching rooms shall not be set in more than 5 floors.
7. Theater, cinema, auditorium should be arranged in a fire-resistant class I, II multi-storey building of the first, second or third floor; set in three fire-resistant class III building, shall not be arranged in the third and above the floor; set in the underground or semi-underground, it is appropriate to set up in the first floor, shall not be set up in the first floor of the third floor and the following floors.
Three, the three elements of the fire resistance limit
1. Influence of the fire resistance limit of the three elements: thermal insulation, integrity, load-bearing capacity.
2. The fire resistance limit is determined by the shortest time of the three, who is the first to lose, the fire resistance limit is determined by who!