The Acudor AW-APS Series aluminum floors doors are designed for interior and exterior applications where floodtight or gastight is required. The angle frame construction is designed to be cast into concrete.The diamond plate door panel is reinforced for a live load of 1560 pounds/sq ft (capable of holding up to 25 ft head of water).The door panel overlaps the frame, compressing the gasket, providing for a floodtight/gastight fit.