SC Bridges Practice Questions - South Carolina Bridges Contractor Examination Exam

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Before authorizing steel erection, the controlling contractor must give the steel erector written notification that the concrete in footings, piers, and walls has attained which of the following?

25 percent of the intended minimum compressive design strength 50 percent of the intended minimum compressive design strength 75 percent of the intended minimum compressive design strength, or sufficient strength to support the erection loads, based on field-cured samples 100 percent of the 56-day design strength on lab-cured cylinders only

Correct Answer:

75 percent of the intended minimum compressive design strength, or sufficient strength to support the erection loads, based on field-cured samples

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