blockout

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blockout

In a concrete structure under construction, a space where concrete is not to be placed.
References in periodicals archive ?
Workers placed storm drains, storm drain inlets, and concrete paving at Thompson Terrace, as well as block-outs and driveways between John McCain and Hall-Johnson.
"Mind Frame" serves up the story of IT specialist Bruce Spencer, who begins to have what he calls "block-outs" as he appears to grow smaller and see events from a past life that is not his own.
He's probably the best post player we have in terms of maneuvering with the basketball, and he brings a physical aspect as far as block-outs and rebounds and just being a big guy inside."