The special fire resistance limit of industrial building components is enough to remember these 12 items!

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The ceiling in the building with Class II fire resistance rating is made of non-combustible materials, and its fire resistance limit is unlimited.

2.

The fire resistance limit of firewalls in Class A and B factories and Class A, B and C warehouses shall not be less than 4.00h.

3.

The fire endurance of columns in single-storey buildings (warehouses) with Class I and Class II fire resistance rating shall not be less than 2.50h and 2.00h respectively.

4.

The roof load-bearing components shall be the roof load-bearing components of single-storey and multi-storey buildings (warehouses) with the first-grade fire resistance fully protected by the automatic sprinkler system, and the fire resistance limit shall not be less than 1.00h.

5.

Except for Class A and B warehouses and high-rise warehouses, the non-bearing exterior walls of Class I and II fire resistance buildings shall have a fire resistance limit of not less than 0.25h when non-combustible walls are used; When fire-resistant wall is used, it shall not be less than 0.50h.

When non-combustible walls are used for non-load-bearing exterior walls of aboveground buildings (warehouses) with Class I and Class II fire resistance rating of Class D and Class E on the fourth floor and below, the fire resistance limit is not limited.

6.

Room partition The fire resistance limit of the room partition in the plant (warehouse) with secondary fire resistance rating should be increased by 0.25h when the fire-resistant wall is used.

7.

Prestressed floor slabs with secondary fire resistance grade shall be used in multi-storey buildings and multi-storey warehouses.

The fire resistance limit of the floor slabs with prestressed reinforced concrete shall not be less than 0.75h.

8.

The fire endurance of the roof panel of the accessible flat roof of the buildings (warehouses) with fire resistance grade I and II shall not be less than 1.50h and 1.00h respectively.

9.

The roof panel of the plant (warehouse) with fire resistance grade I and II shall be made of incombustible materials.

Non-combustible materials and fire-retardant materials should be used for the roof waterproof layer; When combustible waterproof materials are used and laid on combustible and flame retardant insulation materials, the waterproof materials or combustible and flame retardant insulation materials shall use non-combustible materials as the protective layer.

10.

When it is necessary to use metal sandwich panels for non-load-bearing exterior walls, room partitions and roof panels in buildings, the core materials shall be non-combustible materials, 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) that is loaded by wooden columns and whose walls are made of incombustible materials can be determined according to Level 4.

12.

The exposed parts of prefabricated reinforced concrete members and prefabricated reinforced concrete members shall take fire protection measures, and the fire resistance limit of the nodes shall not be lower than that of the corresponding members..
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