Plan and section views detail a roof drain sump assembly with dimensional and installation requirements. A primary roof drain features a notched retaining ring and cast iron dome, while a secondary roof drain is set two inches higher with a non-notched retaining ring and cast iron dome. Manufacturer's tapered insulation panels form the drainage sump over the roof deck and roofing membrane, eliminating hand-cut insulation. Preservative-treated wood nailers and shims are incorporated as required beneath the drainage components. Clear spacing parameters dictate minimum and maximum distances between drain bowls along with pipe diameter relationships.
6' MIN. 10' - 0" MAX. (BASED ON SPACING BETWEEN DRAIN BOWLS AS INDICATED BELOW) 2" 3'-0" (8 PIPE DIAMETERS MIN.OR 12 PIPE DIAMETERS MAX.) 6' - 0" MIN. 10' - 0" MAX. (BASED ON SPACING BETWEEN DRAIN BOWLS AS INDICATED BELOW) 2' - 0" (HOLD) 2' - 0" MIN. 6' - 0" MAX BETWEEN DRAIN BOWLS 2' - 0" (HOLD) EDGE OF SUMP PLAN SLOPE IN SUMP BETWEEN DRAINS PRIMARY ROOF DRAIN W/ NOTCHED RETAINING RING AND CAST IRON DOME NOTES: ANY EXTG. DRAIN LINES THAT ARE CLOGGED WITH DEBRIS, BALLAST, LEAVES ETC. SHALL BE CLEANED OUT AND ARE TO BE VERIFIED TO BE IN GOOD WORKING ORDER. USE MANUFACTURER'S TAPERED INSULATION PANELS TO CREATE PRIMARY DRAIN SUMPS - NO HAND CUT INSULATION WILL BE ALLOWED. WHERE EXISTING PLASTIC DRAIN DOMES OCCUR, REPLACE WITH NEW CAST IRON DOMES SECONDARY ROOF DRAIN WITH NON-NOTCHED RETAINING RING AND CAST IRON DOME - SET 2" HIGHER THAN PRIMARY DRAIN SECONDARY ROOF DRAIN WITH NON-NOTCHED RETAINING RING AND CAST IRON DOME - SET 2" HIGHER THAN PRIMARY DRAIN LINE OF SUMP (BEYOND) PRIMARY ROOF DRAIN W/ NOTCHED RETAINING RING AND CAST IRON DOME RIGID INSULATION - VARIES BY PROJECT ROOF DECK VARIES BY PROJECT ROOFING MEMBRANE VARIES BY PROJECT SECTION MANUFACTURERS TAPERED INSULATION SYSTEM NOTE: WHERE RAISING OF SECONDARY DRAIN IS REQUIRED TO ACHIEVE THIS DETAIL MODIFY EXISTING PLUMBING AS REQUIRED SLOPE IN SUMP BETWEEN DRAINS PRESERVATIVE TREATED NAILERS / SHIMS AS REQ'D
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