Architectural · A-Y6B34

PVC Curb Flashing at Roof Hatch and Ladder Connection

Materials

Concrete Steel Metal (misc.)

Elements

Roofs Floors / Slabs Waterproofing / Flashing Drainage Site / Paving Connections / Plates Roof / Floor Openings

Connections

Welded Connection

About this detail

An insulated metal curb sits atop the roof assembly, wrapped in a PVC membrane secured with fasteners and seam plates by the roofing manufacturer and finished with hot air welds. A one-half-inch cover board underlies the roofing membrane. Four-by-eight-by-three-eighths-inch steel bent plates are secured at the top, mid-height, and bottom using two number-fourteen sheet metal screws into backing, providing support for weights between one hundred and four hundred pounds. A steel ladder with continuous siderails made from three-eighths by two-and-a-half-inch steel flat bars with eased edges spaced sixteen inches apart features three-quarter-inch-diameter steel bar rungs spaced twelve inches on center.

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