Fire Resistance Level

Fire Resistance Level

Date:Aug 21, 2018

The fire resistance level of doors is tested and authorized by Underwriter’s Laboratories, Inc. (U.L.), which places an official certification label on the door.

UL divides fireproof doors into different class categories, which basically determine the fire resistance period in your building, before all occupants must be evacuated from the premises. The components and hardware of the door, be it steel or glass panels, determine its level of fire resistance.


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