Structural · S-Y3T72

Typical Hanging Plenum Bracing

Materials

Concrete Steel

Elements

Walls Decks Arches Bracing Anchors / Embeds

Connections

Bracing Connection Bolted Connection Embed Plate

About this detail

Hanging plenum bracing is anchored to a composite steel deck with 2 inches of normal-weight concrete over 2 inches of composite steel deck and a continuous W9x25 beam. The assembly incorporates a double-angle kicker member composed of two 2L6x6x1/2 angles connected via stitch plates, welded with quarter-inch fillet welds on three sides, and anchored to an embedded half-inch by 16-inch by 1 foot 4-inch plate with six 5/8-inch diameter by 4-and-a-half-inch studs at 12 inches gauge. Hangers consist of double angles (2L4x2x1/4 long legs back-to-back) fastened with two 7/8-inch diameter A325 bolts top and bottom, spaced at a maximum of 8 feet horizontally for shaft and rated walls per architectural plans. Reinforcing includes three #4 bars by 5 feet long and three #6 bars at 12 inches located in the bottom flutes of the deck. Notes require coordinating fireproofing for a minimum 3-hour rating, providing kickers at a maximum spacing of 16 feet and at each end of the shaft, and adding in-plane bracing at each end of each shaft wall.

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