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

Dowel splice
All listed here
Hooked splice
Straight bar splice

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

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