Structural · S-S827K

Typical Openings in Slab on Grade

Materials

Elements

Floors / Slabs Reinforcing Roof / Floor Openings

About this detail

This structural detail provides standard reinforcement requirements for penetrations and openings in a slab on grade up to four feet maximum width. Additional reinforcement consists of number five bars at four feet long placed at top and bottom of openings, with specific bar counts determined by opening dimensions and spacing distances. Continuous slab reinforcement is maintained where possible, with minimum embedment lengths of two feet or development length required at edges. Smaller openings may be grouped within a zone reinforced as a single larger opening, subject to minimum three-inch clearances.

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