3/4-hour (45 Minute) Doors

3/4-hour (45 Minute) Doors

Date:Jan 28, 2019

Doors with 3/4-hour fire protection ratings are used in one-hour walls. A 3/4-hour rated door is found in walls of corridors and room partitions. A door with this rating may also be located in the exterior wall of a building subject to moderate fire exposure from the outside of the building.


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