Architectural · A-XB63S

Fire-Rated Wall Head-of-Wall Assembly at Obstruction

Materials

Cold-formed Steel Timber / Wood Metal (misc.)Gypsum / Drywall

Elements

Walls Partitions Ceilings Floors / Slabs Bracing Insulation Anchors / Embeds

Connections

Bracing Connection

About this detail

A fire-rated or smoke-rated shaftliner partition meets an overhead obstruction. The partition is framed with 2-1/2-inch E-studs and 1-inch shaftliner, sheathed with 5/8-inch Type X gypsum board, and filled with batt insulation. The top runner track attaches to a 2-1/2-inch-leg J-track secured with powder-driven fasteners at 24 inches on center. The joint incorporates mineral wool safing insulation with Hilti CP 572 at sound and smoke partitions, alongside Hilti CFS-SP WB spray firestopping at fire-rated partitions per UL system HW-D-0572. Additionally, 3-5/8-inch 20-gauge metal stud kickers spaced at 48 inches on center provide lateral bracing, anchored to the wall using 16-gauge clips and 3 sheet metal screws.

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