Structural · S-GTGTA

Mechanical Equipment Roof Curb and Support Frame Detail

Materials

Elements

Beams Roofs Decks Arches Insulation Site / Paving Connections / Plates Roof / Floor Openings

About this detail

A continuous roof curb supports the mechanical unit over a bare metal deck and steel beam framing, with a minimum eight-inch clearance to the top of roofing and insulation. A three-eighths-inch bent plate runs along each side of the unit, coordinated with mechanical and architectural layouts for level platform heights. A plan view shows a four-inch long L4x4xone-quarter angle at each corner welded with three-sixteenths welds on three sides, maintaining a one-inch maximum gap. Plates measuring one-quarter by two inches are spaced at four feet on center maximum along the beam. A one-eighth weld with a two-inch length and twelve-inch spacing secures the roof curb to the structural support frame on all sides, while three-eighths-inch fillet welds attach the bent plates on three sides.

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