This architectural detail shows a roof curb transition at Level 31, incorporating a polyvinyl chloride (PVC) waterproofing membrane and an electronic field vector mapping grid. A sheet metal counterflashing is fully embedded in sealant with all laps sealed. A welded plate for water deflection features rounded edges and continuous welds. A minimum two-inch polymethyl methacrylate (PMMA) liquid flashing membrane runs continuously around the structural beam, overlapping four inches onto the sheet metal flashing and four inches onto the beam.
7 LEVEL 31 450' - 9 1/4" SHEET METAL COUNTERFLASHING FULLY ENBED IN SEALANT SEAL ALL LAPS 07 5400 POLYVINYL CHLORIDE (PVC) WATERPROOFING MEMBRANE, E-RF-02 07 5400 SS ELEC FIELD VECTOR MAPPING GRID 2" MIN PMMA LIQUID FLASHING MEMBRANE CONTINUOUS AROUND BEAM. LAP 4 IN. ONTO SHEET METAL FLASHING AND 4 IN. ONTO BEAM WELDED PLATE FOR WATER DEFLECTION. ROUNDED EDGES AND CONTINUOUS WELDS 07 5400 POLYVINYL CHLORIDE (PVC) WATERPROOFING MEMBRANE, E-RF-02 CURB BEYOND 15 A4.75.6 TYP
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