Fire-Rated Uninsulated Panel with Flange - Acudor

22" x 36" Fire Rated Un-Insulated Access Door with Flange - Acudor Approved by Underwriters Laboratories (UL) for 1 1/2 hours "B" label in walls and ULC for 2 hours "B" label in walls. Designed to maintain continuity in a 2-hour fire barrier wall, the FB-5060 should be used whenever it is necessary to provide access in fire rated walls, when temperature rise is not a factor.