Mechanical · M-67SRD

Air Handling Unit Curb Support and Isolation Detail

Materials

Concrete Steel Stainless Steel Metal (misc.)

Elements

Roofs Decks Waterproofing / Flashing Insulation Millwork / Casework Site / Paving Anchors / Embeds Connections / Plates

Connections

Bolted Connection Embed Plate

About this detail

An air handling unit casing is supported on a steel rail and anchored to a concrete roof curb over a metal deck and rigid foam insulation assembly. The concrete curb top is flat and level to provide continuous support for the air handling unit steel frame. Two layers of three-quarter-inch neoprene pads with a deflection of zero point one inches are separated by a one-sixteenth-inch thick stainless steel plate all around, resting on a one-sixteenth-inch thick steel plate. The assembly is secured with seven-eighths-inch diameter Hilti TZ expansion bolts with a minimum six-inch embedment and sealed weathertight. A five-by-five-by-quarter-inch thick, four-inch long hot-dipped galvanized steel angle is welded with a three-eighths-inch fillet weld to the frame. Flashing and roofing, counter flashing, and tapered roof insulation tie into the concrete curb.

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