RCC Structures Design
The load stress of a section can be reduced by

Decreasing the lever arm
Replacing smaller bars by greater number of greater bars
Replacing larger bars by greater number of small bars
Increasing the total perimeter of bars

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RCC Structures Design
As per IS : 456, the reinforcement in a column should not be less than

0.7% and not more than 7% of cross-sectional area
0.8% and not more than 8% of cross-sectional area
0.5% and not more than 5% of cross-sectional area
0.6% and not more than 6% of cross-sectional area

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