Special fire resistance limit of industrial building components. Remember these 12 items!

1.

Ceiling # the ceiling of incombustible materials in buildings with class II fire resistance rating has unlimited fire resistance limit.

2.

The fire resistance limit of firewall in class A and class B plants and class A, class B and class C warehouses shall not be less than 4.00h.

3.

Column I The fire resistance limit of the column of single-layer workshop (warehouse) with class II fire resistance rating shall not be less than 2.50h and 2.00h respectively.

4.

The load-bearing components of the roof shall be class I single and multi-layer workshops with full protection of automatic sprinkler system The fire resistance limit of load-bearing components on the roof of (warehouse) shall not be less than 1.00h.

5.

Except for class A and class B warehouses and high-rise warehouses, the fire resistance limit of non load-bearing exterior walls of buildings with class I and II fire resistance rating shall not be less than 0.25h when non combustible walls are used; it shall not be less than 0.50h when non combustible walls are used.

Class I and II fire resistance rating D and e of 4 floors and below For the non load-bearing exterior wall of the above ground plant (warehouse), when the non combustible wall is adopted, its fire resistance limit is unlimited.

6.

The room partition wall is a plant with class II fire resistance rating The fire resistance limit of the partition wall of the room in (warehouse) shall be increased by 0.25h when the fire retardant wall is used.

7.

The fire resistance limit of the prestressed floor slab with secondary fire resistance rating in multi-storey plant and the floor slab with prestressed reinforced concrete in multi-storey warehouse shall not be less than 0.75h.

8.

The fire resistance limit of the plant with primary and secondary fire resistance rating on the accessible flat roof For the accessible flat roof of (warehouse), the fire resistance limit of the roof slab shall not be less than 1.50h and 1.00h respectively.

9.

Class I and II fire resistance rating of the roof slab The roof slab of (warehouse) shall be made of incombustible materials.

The roof waterproof layer shall be made of incombustible materials and flame-retardant materials; when combustible waterproof materials are used and laid on combustible and flame-retardant thermal insulation materials, the waterproof materials or combustible and flame-retardant thermal insulation materials shall be made of incombustible materials as the protective layer.

10.

Non load-bearing exterior walls, room partitions and roof slabs in metal sandwich plate buildings shall be adopted when it is really necessary When the metal sandwich plate is used, the core material shall be non combustible material, and the fire resistance limit shall comply with the relevant provisions of this specification.

11.

Unless otherwise specified in this specification, the fire resistance rating of the plant (warehouse) with wood column bearing and non combustible materials on the wall can be determined according to level 4.

12.

The exposed parts of the joints of precast reinforced concrete members shall be protected from fire, and the fire resistance limit of the joints shall not be lower than that of the corresponding members…