BS 476-31.1:1983(2014) Fire tests on building materials and structures — Part 31 : Methods for measuring smoke penetration through doorsets and shutter assemblies — Section 31.1 Method of measurement under ambient temperature conditions
1983BS 476-31.1:1983 Fire tests on building materials and structures - Methods for measuring smoke penetration through doorsets and shutter assemblies - Method of measurement under ambient temperature conditions