Question

Vertical columns of the same material, height and weight have the same end conditions. Which cross-section will carry the maximum load?

• A. Solid circular section
• B. Thin hollow circular section
• C. I - section
• D. Solid square section

Answer 1

Answer:

B. Thin hollow circular section

Columns of same material, height and weight have same end conditions. Thin hollow circular section carries maximum load due to larger moment of inertia. Load carrying capacity is directly proportional to moment of inertia and inversely proportional to effective length. For a long column Euler's load is given by,$P= \frac{\pi ^ 2 E I_{min}} {L_{eff} ^ 2}$