NF P92-800-4:2007 Fire classification of construction products and building elements - Part 4 : classification using test data from fire resistance tests on smoke control systems.
2012NF P92-800-4:2012 Fire classification of construction products and building elements - Part 4 : classification using data from fire resistance tests on components of smoke control systems.
2007NF P92-800-4:2007 Fire classification of construction products and building elements - Part 4 : classification using test data from fire resistance tests on smoke control systems.