Practice question

Why must reinforcing bars have the specified concrete cover?

Cover is only a detailing convenience and may be reduced to zero to save concrete
Cover protects the steel from corrosion and fire and gives the bar development length a surrounding mass of concrete
Cover is required only on epoxy-coated bars, never on black bars
Extra cover always replaces the need for stirrups or ties

Answer: B — Cover protects the steel from corrosion and fire and gives the bar development length a surrounding mass of concrete

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