This roof drain assembly features a cast iron dome set over a drain pan with an underdeck clamp set level below the roof deck. A non-combustible two-inch fiber cant strip is installed at the perimeter wall intersection. Flashing ring with integral gravel stop and flashing compound are applied all around the drain flange. The waterproofing system consists of two layers of forty-five mil TPA membrane set into white sheeting bond adhesive. The roof drain well remains level, and an overflow drain is located beyond per plumbing drawings.
CAST IRON DOME NON-COMBUSTIBLE 2" FIBER CANT STRIP AT PERIMETER UNDERDECK CLAMP SET LEVEL, TYP. RD23 RD21 DRAIN PAN FLASHING RING W/ INTEGRAL GRAVEL STOP FLASHING COMPOUND, ALL AROUND WD39 NOTES: • REFER TO PLUMB. DWGS. FOR ADDITIONAL INFO. • ROOF DRAIN WELL TO REMAIN LEVEL. • DRAIN PAN: PROVIDE TWO LAYERS 45 MIL TPA MEMBRANE SET INTO WHITE SHEETING BOND ADHESIVE. BASIS OF DESIGN - PER DISTRICT STANDARD. RD22 RD63 FOR OVER FLOW DRAIN DRAWING, SEE DETAIL: 11 A.M9.21 OVE FLOW DRAIN BEYOND
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