Architectural · A-V8YNH

Rated Partition Head at Structural Metal Deck Roof

Materials

Steel Timber / Wood Gypsum / Drywall

Elements

Walls Partitions Roofs Decks

Connections

Deck Attachment

About this detail

A rated metal stud partition terminates at a structural metal deck roof assembly. A minimum 2-3/4 inch thick sprayed-on fireproofing and flute closure seal the deck profiles above the wall. A continuous 20-gauge metal top runner track with 2-1/2 inch long slotted legs is suspended from the deck using 1/2-inch by 18-gauge metal Z-clips spaced at 16 inches on center, attached with at least one number 10 self-tapping sheet metal screw at each end. Gypsum board is fastened to the metal studs only, stopping a minimum of 1/2 inch below the top runner track to allow for structural deflection. Acoustic insulation is installed within the stud cavity where scheduled, and the partition includes rated gypsum layers on both sides. A continuous 3/4-inch by 1-inch by 25-gauge metal angle with 3.4 galvanized expanded metal lath is secured with fasteners at 16 inches on center at the perimeter joint. The assembly meets head-of-wall ratings including ICC-ESR-1042, UL 2079, ASTM E1966, and ICBO-ER-5344 for both 1-hour and 2-hour rated partitions.

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