BS EN 13501-3+A1:2006 Fire classification of construction products and building elements - Classification using data from fire resistance tests on products and elements used in building service installations: fire resisting ducts and fire dampers
2006BS EN 13501-3:2005+A1:2009 Fire classification of construction products and building elements - Classification using data from fire resistance tests on products and elements used in building service installations: fire resisting ducts and fire dampers
2006BS EN 13501-3:2005 Fire classification of construction products and building elements - Part 3: Classification using data from fire resistance tests on products and elements used in building service installations: fire resisting ducts and fire dampers