Mechanical · M-9B7JE

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

About this detail

An air handling unit secures to a manufacturer seismic curb on the roof assembly. The fourteen-gauge galvanized sheet metal curb features fully welded seams and fastens to the equipment base using three-eighths-inch diameter by two-inch Hilti KB-TZ expansion anchors into pre-drilled holes, with seven anchors per long side and five per short side. A wood nailer integrates for flashing at the base. The air handling unit attaches to a twelve-gauge seismic bracket using one-quarter-inch by one-inch self-tapping steel screws provided with the curb, utilizing eight screws per bracket with three brackets on each long side and two on each short side.

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