Building materials play an important role in the fire prevention measures of buildings, so each country has strict corresponding requirements for the flame retardancy of building materials. Among them, the building material fire test standard BS 476 is also one of the important test standards, so what are its requirements for building material fire resistance? BS 476-7 Fire test on building materials and structures-standard name: BS 476-7: Part 7: Method of test to determine the classification of the surface spread of flame of products. BS 476-7 is used for measuring the lateral spread of flame along the surface of a specimen of a product oriented in the vertical position under opposed flow conditions. BS 476-7 is primarily used for the determination of flame spread on exposed surfaces of walls and suspended ceilings.
BS476-7 Fire tests on building materials and structures - Standard application scope:✓ Exposed surfaces of wall coverings✓ Insulation exposed surfaces✓ Exposed surfaces of ceiling materials BS 476-7 Building materials fire resistance test - standard analysis: BS 476-6 is used to compare the contribution of various materials of building materials to the formation of fire, and is mainly used to assess the fire performance of building materials and structures for wall and ceiling linings. The results of the determination are expressed in terms of flame spread index. Its test apparat