Architectural · A-2T2NT

Roof Equipment Curb and Pipe Support Detail

Materials

Steel Stainless Steel Metal (misc.)

Elements

Columns Roofs Decks Waterproofing / Flashing Insulation Site / Paving Connections / Plates Roof / Floor Openings

Connections

Base Plate / Anchorage HSS Connection Welded Connection Bolted Connection Rebar Splice / Development Deck Attachment

About this detail

A rooftop mechanical equipment curb and a structural pipe support penetrate through the roof assembly. The roof buildup consists of a roof deck, rigid insulation, coverboard, and a fully adhered roofing membrane. The mechanical unit curb features preservative-treated two-by framing with nailers and shims to match the insulation depth, while the roofing membrane runs continuously over the top of the curb with seam plates and fasteners spaced at twelve inches on center. The adjacent pipe support utilizes a twelve-by-twelve-inch by one-half-inch galvanized steel base plate fastened to the roof deck, supporting a galvanized hollow structural section post with welded three-by-three-by-one-quarter-inch steel angles secured by a one-half-inch diameter through-bolt with a lock washer. A galvanized channel caps the post, and a pre-molded polyvinyl chloride pipe flashing with a stainless steel clamping ring and continuous bead of approved sealant weatherproofs the penetration.

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