scope:

This Part of EN 1366 is describing a method for determining the evaluation of fire resistance of vertical and horizontal ventilation ducts including those access panels, which are integral part of the tested ducts/duct walls. The test examines the behaviour of ducts exposed to fire from the outside (duct A) and fire inside the duct (duct B). This Standard is used in conjunction with EN 1363-1. Annex A provides general guidance and gives background information. This European Standard is not applicable to: a) ducts whose fire resistance depends on the fire resistance performance of a ceiling; b) ducts containing fire dampers at points where they pass through fire separations; c) access panels, which are evaluated independent from the tested ducts/duct walls; d) two or three sided ducts; e) fixing of suspension devices to floors or walls. For evaluation of fire dampers see EN 1366-2. For evaluation of smoke extraction ducts see EN 1366-8. For evaluation of service ducts and shafts see prEN 1366-5.