How is a Fire Door Tested?

In order to determine a fire resistance rating of a fire door, the manufacturers have their fire doors assessed by subjecting them to a test procedure as specified in BS 476-22:1987 or BS EN 1634-1:2014. The door set is exposed to a ‘standard’ fully developed fire in a test furnace until failure occurs according the below criteria. The times specified in all legislation relate to the time of exposure to the fully developed fire after flashover (the ignition of all exposed combustible materials) has occurred; it does not include the time taken for the fire to develop.

Fire and Smoke doors have to undergo a further test to ensure no cold smoke penetrates around the perimeter of the door, these tests are BS 476-31.1: 1983 BS EN 1634-3:2004.