Answer Posted / robert
CSA A23.3 prescribes that the ratio of reinforcement range
from 1% to 8%.
It's common practice to have a reinforcement ratio in the
range of 1% to 4%. So the minimum is 0.01* (Area gross)
However, a reinforcement ratio less than 1% but larger than
0.5% may be used provided that the axial and flexural
resistances are multiplied by a correction factor.
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