A large sump roof drain assembly is integrated into a gypsum roof deck and rigid insulation layers. Flashing seals the membrane around the drain perimeter above the insulation. A drain receiver and deck clamp secure the assembly to the structural roof deck from below. The drainage piping connects via a threaded outlet and caulk outlet configuration.
THREADED OUTLET DECK CLAMP FLASHING CAULK OUTLET DRAIN RECEIVER INSULATION GYPSUM ROOF DECK NONE 5 LARGE SUMP ROOF DRAIN DETAIL
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