What are the levels of fire protection?
Update:Feb 22,2024
Summary:1. The building fire resistance rating is divided into Grade I, II, III and IV; 2: the highest level, the strongest fire resistance; The fourth grade......
1. The building fire resistance rating is divided into Grade I, II, III and IV; 2: the highest level, the strongest fire resistance; The fourth grade is the lowest and the fire resistance is the weakest; 3. The fire resistance rating of a building depends on the [flammability and fire resistance limit] of the building components that make up the building; 4. The so-called building components refer to a series of basic components such as walls, foundations, beams, columns, floors, stairs and suspended ceilings of buildings; 5. There are three conditions for building components to reach the fire resistance limit, namely: 01: loss of support capacity; 02: loss of integrity; 03: Loss of fire protection; As long as any one of the three conditions is reached, it is determined that it has reached its fire resistance limit. fire-protection rating 1. Fire rating mainly refers to building insulation materials, which are classified into Class A nonflammable type, Class B1 nonflammable type, Class B2 combustible type, also known as flame retardant type and Class B3 flammable type; 2. The new national standard "Classification of Combustion Performance of Building Materials and Their Products" (GB8624-2006) was implemented on March 1, 2007, in which the combustion performance of building materials and their products was divided into seven grades: A1, A2, B, C, D, E and F
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