Structural · S-3NYHF

Concrete Filled Deck Parallel to Wall

Materials

Concrete Steel Masonry / CMU

Elements

Walls Decks Anchors / Embeds

Connections

Embed Plate

About this detail

A concrete-filled metal deck runs parallel to a concrete masonry unit wall. A one-inch gap is maintained between the top of the masonry wall and the underside of the deck, filled with compressible material. A C12x20.7 channel, one foot long, is anchored to the underside of the deck using two half-inch diameter expansion anchors with three-and-a-quarter-inch embedment. The channel is welded to a three-eighths-inch plate with a quarter-inch fillet weld on three sides. The assembly is placed at each end of the wall and at a maximum of forty-eight inches on center intermediately. Two five-eighths-inch diameter by four-inch embedment headed anchor bolts, or expansion anchors, secure the plate to the masonry wall through two two-and-a-half-inch diameter oversized holes. These holes are covered with three-and-a-half by three-and-a-half by three-eighths-inch thick plate washers. Expansion anchors are installed using the installation torque noted in the ICC report, after which the nut is backed off and set in a snug tight condition at the low flute.

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