RCC Structures Design
The system in which high tensile alloy steel bars (silica manganese steel) are used as pre-stressing tendons, is known as

Lee-McCall system
C.L. standard system
Freyssinet system
Magnel-Blaton system

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

0.5% and not more than 5% 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
0.6% and not more than 6% of cross-sectional area

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