Civil Engineering - RCC Structures Design - Discussion

L/b <= 3 pedestal.
3<L/b<=12 short column.
12<L/b<=60 long column.
L/b >= 60 redesign.
As per IS456: 2000.

Short RCC Column =<12.
Long RCC Column >12.
Short Steel column, =<50.
Intermediate Steel Column >40 & <200.
Long Steel Column >200.

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

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.

FOR LONG COLUMN - Ratio of unsupported length between end restraints shall not exceed 60 times the least lateral dimension of column.

It's answer is 60 for long columns.

The question should be for Steel column.

The answer 50 is correspondence with the Steel column.

Slenderness ratio less than 12 then it is termed as short column and more than 12 then it is a long column.

Please give a answer with the reference.

50 for rcc & 80 for steel.