RCC Structures Design
An under-reinforced section means

Steel will yield first
Steel provided is insufficient
Steel is provided at the underside only
Steel provided on one face only

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

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

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RCC Structures Design
Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than

42 diameters from the outer edge of the column
24 diameters from the centre of the column
42 diameters from the inner edge of the column
42 diameters from the centre of the column

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