A good target design for concrete columns in terms of reinfo

A good target design for concrete columns in terms of reinforcement to concrete ratio is

A         0%

B          2%

C          4%

D         8%

Solution

(D) is the correct answer. (American Concrete Institute) ACI 318-14 Code and Commentary, columns which have reinforcement ratios, in the range of 1% to 2% will usually be the most economical, with 1% as a minimum and 8% as a maximum by code.