The assembly features primary and secondary roof drains installed within a sloped metal deck roof assembly. The secondary roof drain incorporates a one-and-one-quarter-inch water dam and an extension sleeve set three-quarters of an inch above the primary drain extension sleeve. Both drains are secured with a roof sump receiver and an under-deck clamp beneath the metal deck. The roof assembly slopes at one-half inch per foot toward the drains.
SECONDARY ROOF DRAIN 1 1/4" WATER DAM SET EXTENSION SLEEVE 3/4" ABOVE PRIMARY DRAIN EXTENSION SLEEVE ROOF SUMP RECEIVER UNDERDECK CLAMP PRIMARY ROOF DRAIN RE: PLUMBING ROOF ASSEMBLY - SEE ROOF TYPES ROOF SUMP RECEIVER UNDER DECK CLAMP 1/2": 1' - 0" SLOPE METAL DECK EDITOR'S NOTE: THIS IS A SINGLE-PLY MEMBRANE DETAIL. BUILT-UP AND MODIFIED BITUMEN ROOFS REQUIRE A LEAD SUMP B
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