Structural · S-9QJKE

Round Opening in CMU Wall

Materials

Elements

Walls Arches Reinforcing Roof / Floor Openings

About this detail

Round core openings in a concrete masonry unit wall are cored after the wall has been fully grouted and must lie within the reinforced core area. Wall reinforcement stops at the opening, with sizing and modules coordinated with architectural and mechanical drawings. Trim bars are placed at each side of the opening to match the size and quantity of primary reinforcement bars interrupted by the penetration, with a minimum of two number five bars on each side extending two feet beyond the edge of the opening. Openings smaller than sixteen inches require no additional reinforcing unless distributed reinforcement is interrupted, while clusters of small holes exceeding one foot overall are reinforced as a single opening.

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