Structural · M-V37D8

Mechanical Equipment Platform Framing on Roof

Materials

Steel Timber / Wood

Elements

Roofs

Connections

Timber / Mass-Timber Connection

About this detail

This rooftop equipment platform assembly rests on existing roof rafters spaced at sixteen inches on center. The platform framing consists of two by six wood joists, four by six sleepers with field-verified depths up to twelve inches maximum, and four by six blocks secured with Simpson A34 framing anchors at each end. A twelve gauge bent plate fastened with two three-eighths inch diameter lag screws having a two inch penetration ties the sleeper and block assembly together. The platform is topped with three-quarter inch plywood sheathing to support the mechanical unit.

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