Architectural · A-WQDVQ

Two-Hour Shaftwall Enclosure at Bottom of Mechanical Shaft

Materials

Timber / Wood Gypsum / Drywall

Elements

Walls Partitions Anchors / Embeds Roof / Floor Openings

Connections

Embed Plate

About this detail

This two-hour fire-rated mechanical shaftwall enclosure detail is established at the bottom of a mechanical shaft with structural steel framing. The shaftwall metal J-runner track, twenty gauge minimum, attaches to the structure using minimum three-eighths-inch embedment anchors at twenty-four inches on center with a two-and-one-half-inch minimum embedment. Each metal stud connects to the runner track using two fasteners at twenty-four inches on center, meeting shear and withdrawal resistance required for the size and span of the rated assembly. A rated fire damper is integrated at the ductwork penetration through the rated partition type. Metal eighteen gauge Z-clips spaced at twelve inches on center attach using two minimum one-eighth-inch powder-actuated fasteners with one-half-inch embedment, supporting a shaftwall metal J-runner track secured with minimum number eight sheet metal screws at twelve inches on center while gypsum board extends tight to the fireproofing. The assembly achieves a two-hour fire rating designated as WHI-495-PSH-0167.

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