SSC JE Civil Engineering 29-Oct-2020 Shift 1 Paper

Concept:
The column is classified based on its slenderness ratio Considering x-axis is as major axis because $\mathrm{Ixx}$ is greater and y-axis as the minor axis
$\mathit{a}>\mathit{b}\Rightarrow \mathrm{Ixx}>\mathrm{Iyy}$
Slenderness ratio $=\frac{{\mathrm{L}}_{\mathrm{eff}}}{\mathrm{Lateral}\mathrm{dimension}}$
${\mathrm{\lambda }}_{\mathit{x}}=\frac{{\mathrm{L}}_{\mathrm{eff}}\times \mathit{x}}{\mathrm{D}};{\mathrm{\lambda }}_{\mathit{y}}=\frac{{\mathrm{L}}_{\mathrm{eff}}\times \mathrm{y}}{\mathrm{D}}$
So,
λmax ≤ 3 → Pedestal
3 < λmax < 12 → short column
12 ≤ λmax → Long column