As per IS: 456-200, what is the recommended value of effective length of RCC compression member of unsupported length / that is effectively held in position and restrained against rotation at one end and at the other restrained against rotation but not held in position?

Correct option is B

→ For column, the effective length of a column held in position and restrained against rotation at one end, and at the other end restrained against rotation but not held in position is 1.20L
→ Effective length of column effectively held in position at both ends and restrained in direction at one end = 0.80L.
→ Effectively held in position and restrained against rotation at one end but not held in position nor restrained against rotation at the other end = 2.0l.
→ Effectively held in position and restrained against rotation in both ends =0.65l.