Civil Engineering - RCC Structures Design - Discussion

Dear friends.. this question and Answer is for the Wooden column. but not mentioned in the question.

SR = Leff /r.
Where: Leff= the effective length, which depends on the boundary or end conditions (discussed later) r = the radius of gyration r = √ I/A = moment of inertia of the column Based on the slenderness ratio columns are classified as short, intermediate, and long (slender column).

For example, a wooden column with a Leff /r ratio less than 11 is defined as the short column. Intermediate columns have Leff /r values in the range of 11 to 30. The columns with Leff /r value greater than 30 are defined as a long or slender column.

It's answer is 60 for long columns.

Please, anyone give me the correct answer with the clear description.

Short>32.
Medium----32-120.
Long---120.

Le/D > 12 long column.
OR
Le/least radius of gyeration >45 lng column.

In RCC radius of gyration>12 then long column; if <12 short column.

In STEEL, column radius of gyration>200 then long column; if <=50 short column; if inbetween 40-200 then intermediate column.

For steel, long column it is Greater than >50.

Leff/ LLD > 12 is Long column, Leff/LLD<12 is short column.

60 is the correct answer.

If it is l/r less than equal to 40 short column.

Then according to question answer should greater than 40.
So, answer will be 40.