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

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

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RCC Structures Design
Pick up the assumption for the design of a pre-stressed concrete member from the following:

All listed here
During deformation limits, Hook's law is equally applicable to concrete as well as to steel
A transverse plane section remains a plane after bending
Variation of stress in reinforcement due to changes in external loading is negligible

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