Civil Engineering - RCC Structures Design - Discussion

According to IS 456:2000 (Clause 25.1.2):

A column is considered long if the slenderness ratio exceeds 12 for design purposes.

However, in some multiple-choice questions or conceptual discussions (often academic or exam-focused), a value of 60 is typically used to differentiate between short and long columns more strictly especially when referencing unbraced lengths.

But based on IS 456:

Practically: If slenderness ratio > 12, the column is designed as a slender (long) column.

Theoretical/MCQ-based (competitive exams): The answer is usually 60.

I believe 12 is the limit for the effective length of a column to its least lateral dimension which is not the slenderness ratio.

However, the limit for the slenderness ratio is 50 and above to be a long column as the slenderness ratio is the ratio of effective length to its least radius of gyration.

An R.C.C. column is treated as long as its slenderness ratio is greater than 50.

According to IS 456.

Short column - Slenderness Ratio <= 12.
Long Column - Slenderness Ratio > 12.

40 is the correct answer.

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

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

I think it is 40.

It is <40 short.

I think 40 is the correct answer.