Structural · S-TBDR7

Typical Post-Tensioned Concrete Slab Blockout Detail

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Reinforcement configuration around a maximum 5-foot concrete slab blockout with a closure strip. Three number 5 reinforcing bars are placed top and bottom typically, supplemented by number 5 bars at 9 inches on center top and bottom. Distributed tendons terminate at the blockout with a maximum slope of 6 to 1, utilizing hairpins as specified per detail. Additional reinforcing bars measuring 3 feet 6 inches are provided top and bottom typically, while standard slab reinforcement is noted as not required to extend into the blockout zone.

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