Structural · S-PGH8J

Unframed Floor Opening with Concrete Fill

Materials

Concrete Reinforced Concrete Metal (misc.)

Elements

Beams Floors / Slabs Decks Reinforcing Roof / Floor Openings

About this detail

Layout and trim reinforcement for an unframed floor opening within a concrete-filled metal deck slab. Additional reinforcement includes a number five top bar centered in the concrete topping over the metal deck, and number five bottom bars spaced at twelve inches on center in the deck flutes. An extra number four top bar measuring five feet six inches in length is added over the wide flange beam when the edge of the opening falls within twenty-four inches of the beam centerline. Boxed-out openings, recessed boxes, conduits, and pipe-sleeved clusters closer than three inches on center are treated as slab openings. The metal deck opening must be cut only after the concrete has attained its twenty-eight-day design strength.

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