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BS 476 refers to the British standards for fire tests on building insulation materials and structures which approves class 0 or class 1 fire rating. This test standard is split into two parts: Part 6 and Part 7.
BS 476 refers to the British standard for fire tests on building materials and structures. This test standard is split into two parts: Part 6 and Part 7. Part 7 specifies the test method for measuring the lateral spread of flame along the surface of a test specimen.