Architectural · A-JRQSY

Cold-Formed Metal Stud Soffit Framing at Concrete Metal Deck

Materials

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

Elements

Walls Ceilings Decks Anchors / Embeds Connections / Plates

Connections

Embed Plate

About this detail

A cold-formed metal stud soffit is suspended from a concrete over metal deck overhead, addressing conditions both underneath a bottom flute and between bottom flutes. Where the stud aligns with a bottom flute, a continuous eighteen-gauge track is secured with number ten self-tapping sheet metal screws at each contact point and anchored with three-eighth-inch diameter by two-inch embedment Hilti KB-TZ anchors at twenty-four inches on center. Where the stud falls between bottom flutes, a sixteen-gauge by three-inch wide plate is spaced at twenty-four inches on center with three-eighth-inch diameter by two-inch embedment Hilti KB-TZ anchors at each flute for a minimum of two flutes, with two number twelve self-tapping screws at twenty-four inches on center connecting to each plate, supporting a continuous eighteen-gauge track with number ten self-tapping screws at each contact. The vertical framing consists of three-and-five-eighth-inch by twenty-gauge metal studs spaced at twenty-four inches on center, faced with five-eighth-inch Type X gypsum board over three-and-five-eighth-inch metal studs. An acoustical tile ceiling meets the soffit where indicated, utilizing a wall angle secured with number ten sheet metal screws at each stud while left unfastened to the grid, along with a two-by-two by eighteen-gauge continuous angle fastened with number ten self-tapping screws at each contact.

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