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What are the fire rating requirements for external wall insulation materials

With the development of the construction industry, exterior wall insulation materials have been widely used in modern buildings. However, with the occurrence of some fire accidents in recent years, the fire resistance performance of exterior wall insulation materials has attracted widespread attention. The following is a detailed introduction to the fire rating requirements for exterior wall insulation materials.

1、 Classification of fire protection levels according to national standards

According to the national standard "Code for Fire Protection Design of Buildings", the fire rating of external wall insulation materials is mainly divided into Class A (non combustible materials), Class B1 (flame retardant materials), Class B2 (combustible materials), and Class B3 (flammable materials). Among them, Class A materials have the best fire resistance, while Class B3 materials have relatively poor fire resistance.

2、 Fire protection requirements for different types of buildings

High rise residential and public buildings: For high-rise residential and large public buildings, it is usually required to use A-grade or B1 grade exterior wall insulation materials to ensure the fire safety of the building.

Multi story residential buildings and small buildings: For multi story residential buildings and some small buildings, B2 level external wall insulation materials can be selected according to specific situations, but certain fire protection design requirements still need to be met.

Industrial buildings: Industrial buildings have a higher risk of fire, so the fire performance requirements for external wall insulation materials are more stringent, usually requiring the use of Class A or B1 materials.

3、 Fire prevention measures during the construction process

In addition to selecting materials that meet fire rating requirements, corresponding fire prevention measures should also be taken during the construction process. For example, fire isolation zones should be set up at the construction site, equipped with necessary fire-fighting equipment, and ensure that construction personnel understand fire prevention knowledge and emergency response procedures.

4、 Combustion performance testing of materials

Before using external wall insulation materials, strict combustion performance testing should be conducted to ensure that they meet the specified fire rating requirements. In addition, regular fire performance testing should be conducted on the insulation materials already used to promptly identify and address potential safety hazards.

In short, the fire rating requirements for exterior wall insulation materials are an important part of ensuring building safety. In the process of selection and use, relevant standards and regulations should be strictly followed to ensure the fire safety of the building.