RCC Structures Design
Steel bars are generally connected together to get greater length than the standard length by providing

Straight bar splice
Dowel splice
All listed here
Hooked splice

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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 centre of the column
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

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