Structural · S-3ZQN6

Condition Where Reinforcing Is Not Required at Slab Openings

Materials

Concrete Steel Metal (misc.)

Elements

Beams Floors / Slabs Decks Anchors / Embeds Reinforcing Roof / Floor Openings

Connections

Bolted Connection Deck Attachment Timber / Mass-Timber Connection

About this detail

Unreinforced core-drilled or formed openings in concrete over a metal floor deck supported by steel beams or joists. Spacing requirements and framing angles around small penetrations where supplementary reinforcing is omitted based on size and spacing limits. Angles sized at L2-1/2x2-1/2x1/4 are installed before coring and attached to the deck using 1/2-inch diameter Simpson Titen HD screws, Powers wedge bolts, or Hilti Kwik Bolt expansion anchors spaced at 12 inches on center with a 4-inch maximum embedment. Notes govern formed opening procedures, leaving the deck intact during concrete placement, and spacing rules for groups of openings.

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