Structural · S-4AAXA

Suspended Equipment Seismic Bracing Detail

Elements

Roofs Ceilings Floors / Slabs Bracing Connections / Plates

Connections

About this detail

This seismic bracing assembly supports suspended mechanical equipment weighing up to 300 pounds from the floor or roof structure above. Four threaded rod hangers suspend the unit, incorporating Mason 30N-23 spring isolators and rod stiffeners sized per the unit weight: 3/8-inch diameter for equipment under 150 pounds and 1/2-inch diameter for equipment under 300 pounds. Lateral stability is provided by four diagonal braces at a 45-degree angle, using either 1/4-inch diameter cable braces or P1000 Unistrut braces at the contractor's option. Cable braces attach with Mason Type SCB seismic brackets per OPM-0043-13, while Unistrut braces connect using Unistrut P1534A fittings at each end.

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