B-IW Insulated Fire Rated Access Panels with Drywall Bead » 22x36

All series are UL Listed "B" label for 1-1/2 hours in vertical surfaces (maximum temperature rise to 250F in 30 minutes).

Style B-IW: Fire Rated access doors approved for use in walls and ceilings. Ceiling Rating: Warnock Hersey 3 hour noncombustible ceiling/floor systems.