Architectural · A-MYWJM

Rated Partition Head at Metal Deck

Materials

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

Elements

Walls Partitions Decks Anchors / Embeds

Connections

Deck Attachment Embed Plate

About this detail

A fire-rated metal stud partition terminates at a concrete fill over metal deck assembly, with configurations shown for both one-hour and two-hour ratings. The top of the gypsum board is attached to the metal studs only and terminates a minimum of one-half inch below the metal top runner track. A twenty gauge minimum metal top runner track features two-and-a-half-inch long slotted legs and is attached with minimum number eight sheet metal screws at twelve inches on center. A continuous three-quarter-inch by one-inch by twenty-five gauge metal angle with three-point-four pound galvanized expanded metal lath is attached with fasteners at twelve inches on center. Spray-on fireproofing and metal deck flute closure overlap onto the rated partition type, with a minimum two-and-three-quarter-inch concrete fill over metal deck. Two-inch wide by eighteen gauge metal straps are spaced at twelve inches on center, span a minimum of two metal deck flutes, and are attached with a minimum of one one-eighth-inch powder-driven fastener on each side of the strap with a one-inch minimum embedment. Acoustic insulation batts are installed within the stud cavity where scheduled. The assembly complies with head of wall rating number ICC-ESR-1042, UL 2079, ASTM E 1966, and ICBO ER-5344.

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