AZ ROC C-38 Signs Practice Questions - Arizona ROC C-38 Signs Examination Exam

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Before erecting a heavy steel pylon sign pole onto a newly poured concrete foundation, how long should standard Type I/II concrete cure under standard conditions to achieve sufficient compressive strength (typically 70% of design strength)?

24 hours 7 days 3 days 28 days

Correct Answer:

7 days

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