Mechanical · M-8WH5R

Rooftop Air Handling Unit Seismic Curb Mounting Detail

Materials

Steel Timber / Wood Metal (misc.)

Elements

Roofs Waterproofing / Flashing Millwork / Casework Site / Paving Anchors / Embeds Roof / Floor Openings

Connections

Welded Connection Bolted Connection

About this detail

A rooftop air handling unit mounts to a manufacturer's seismic curb and equipment base. The unit secures to a ten-gauge seismic bracket using eight one-quarter-inch by one-inch self-tapping steel screws at the top and four at the bottom. The seismic curb consists of fourteen-gauge galvanized sheet metal with fully welded seams and features a bolt-on final filter access door. At the roof level, the curb assembly bears on a wood nailer for flashing and anchors to the concrete equipment base with seventeen three-eighths-inch diameter by two-inch Hilti KB-TZ expansion anchors per long side and eight per short side.

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