The effective length of a prismatic compression members in which translation and rotation is restrained at both end is given by (L = unsupported length of the compression member):?

Option 1 : 0.65 L

Concept:

Effective length is the distance between two consecutive points of contra-flexure or between points of zero bending moment.

The effective length of column used in calculating the Euler's crippling load is:

• Fixed end: Restrained in both translation and rotation
• Hinged end: Restrained in translation but free in rotation
• Free end: Free in both translation and rotation.

As per IS 800 - 2007:

The effective length of a prismatic compression member of various degrees of end restraint of compression member are given below:

From the above table, it is clear that The effective length of prismatic compression members in which translation and rotation are restrained at both ends is given by 0.65 L