Constructional and performance requirements for mechanisms intended to hold open (or closed) fire protection equipment such as fire doors, dampers etc, releasing on manual operation or receipt of a fire signal.Cross References:BS 302-2BS 5839-1:2002BS 7273BS EN 1154BS EN 1155BS EN 60068-1:2002BS EN 60068-2-1BS EN 60068-2-6BS EN 60068-2-42BS EN 60068-2-47BS EN 60068-2-67BS EN 60529BS EN 60068-1:2002BS EN 60730-1:2001BS ISO 4413
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