Elmdor Fire rated Access Doors are rated by Underwriters Laboratories for 1.5 hours, "B" label in walls, and by Warnock Hersey for 3 hours in ceilings and 2 hours in walls. The FRC Series Doors should be utilized when providing access in fire rated walls and ceilings. FRC Series Doors have heavy-duty spring closures to ensure positive latching when panel closes. An interior latch release is also included on all doors to enable unlocking from inside.