SC Wood Frame Structures Practice Questions - South Carolina Wood Frame Structures Contractor Examination Exam

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Air temperature at a South Carolina pour is 35°F and falling, and the subgrade is frost-crusted. Which cold-weather practice is correct?

Do not place concrete on a frozen subgrade; thaw and protect the earth, and protect the concrete from freezing while it gains strength Place the concrete on the frost; the mix heat will take care of it Add extra water so the mix will not freeze as quickly Use only lightweight aggregate and skip curing

Correct Answer:

Do not place concrete on a frozen subgrade; thaw and protect the earth, and protect the concrete from freezing while it gains strength

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