Primary and secondary roof drains penetrate a precast concrete roof deck with a sloping profile detailed per plan. The roof membrane secures directly to the drain clamping ring according to the manufacturer specifications. A roof drain deck clamp fastens the assembly from the underside of the structural deck. Plumbing connections for both primary and secondary drains are coordinated per the plumbing drawings.
SECONDARY ROOF DRAIN - SEE PLUMBING PRIMARY ROOF DRAIN SEE PLUMBING ROOF DRAIN DECK CLAMP ROOF MEMBRANE - SECURE TO DRAIN CLAMPING RING PER MANUF. VARIES - SEE ROOF PLAN GRID 1 12 PRECAST CONCRETE ROOF DECK SEE PLAN
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