Question

A steel column of rectangular section $(15mm\times 10mm$ and length 1.5 m is simply supported at both ends. Assuming modulus of elasticity, E= 200 GPa for steel, the critical axial load (in kN) is

Answer 1

Buckling load $=\frac{{\pi }^{2}E{I}_{min}}{L^2}$
$=\frac{{\pi }^2\times 200\times {10}^3\times \frac{15\times {10}^3}{12}}{{1500}^2}$
$=1096.62N=1.097kN$