RCC Structures Design
If ‘A’ is the sectional area of a pre-stressed rectangular beam provided with a tendon pre-stressed by a force ‘P’ through its centroidal longitudinal axis, the compressive stress in concrete, is

P/A
2A/P
P/2A
A/P

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

0.6% and not more than 6% of cross-sectional area
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

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