Civil Engineering - RCC Structures Design - Discussion

Yes, that means Slenderness limit should not exceed 60. Beyond that limited, a column can't be considered.

S. N ratio for short column <41 or =41.

And for long column >41.

As per IS 456 and SP16 (clause 3.4 of compression members) if Slenderness ratio leff/LLD is more than 12 it is a long column. For steel structures, the Slenderness ratio is Leff/r min and its limiting value is 180.

A short steel column is one whose slenderness ratio does not exceed 50; an intermediate length steel column has a slenderness ratio ranging from about 50 to 200, and are dominated by the strength limit of the material, while a long steel column may be assumed to have a slenderness ratio greater than 200.

For RCC Column, i) When the ratio of the effective length to its least lateral dimension is less than or equal to 12 it is called as short column. . Why this is important? - Long columns under compression can fail via both bucklings (bending sideways) as well as crushing.

I think 40 is the correct answer.

It is <40 short.

I think it is 40.

According to me, It should be 12 or 40. Anyone, explain the right answer.

If :
SR < 3 ----> Pedestal.
3 < SR < 12 ----> Short column.
12 < SR < 60 ----> Long column.

40 is the correct answer.