16" x 16" Fire Rated Un-Insulated Access Door with Flange for Drywall - Acudor The FB-5060-DW drywall, fire rated access door is an enhanced FB-5060 that includes a galvanized steel drywall taping bead flange to facilitate installation in drywall. The Acudor FB-5060 is 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.