Architectural · A-D259C

Rated Partition Head at Metal Deck

Materials

Concrete Timber / Wood Metal (misc.)Gypsum / Drywall

Elements

Partitions Decks Anchors / Embeds

Connections

Deck Attachment Embed Plate

About this detail

This deflection-capable partition head detail connects a metal stud wall to a concrete-filled metal deck overhead with a three-inch vertical movement allowance. A metal top runner track with long legs forms the slip assembly, secured to two-inch wide by eighteen-gauge metal straps spaced at twelve inches on center that span at least two metal deck flutes. These straps are attached with a minimum of one one-eighth-inch power-driven fastener on each side with a one-inch minimum embedment into the concrete fill. Gypsum board baffles, consisting of one layer for a one-hour rating or two layers for a two-hour rating, are attached to the metal top runner track on both sides of the partition. A three-inch deflection gap is maintained in the gypsum board above the top of the metal studs. Acoustic insulation is installed within the stud cavity where scheduled, and spray-on fireproofing is applied to the metal deck and flute closures. Gypsum board on the partition faces is attached only to the metal studs, stopping a minimum of three inches below the metal top runner track to permit structural movement in compliance with UL system HW-D-1019.

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