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Spirals

Select the most correct statement about spiral reinforcement in concrete columns
A. prevents buckling by bracing the longitudinal bars, B. used in round shaped columns only
C. assists the longitudinal bars in bearing compressive load, D. does not act to confine the concrete in the column, E. is the same as a "tied" column


Answer is A. prevents buckling by bracing the longitudinal bars. Spiral reinforcement also helps confine the concrete.
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