$1\mathrm{.}4$An ISHB $400$@$806\mathrm{.}4\frac{N}{m}$ is to be used as a column $3\mathrm{.}5m$ long with both ends restrained against rotation and translation. Determine the design axial load on the column section. Also assume the following data: $fy=250\frac{N}{m}{m}^2,f_u=410\frac{N}{m}{m}^2$ and $E=2{10}^5\frac{N}{m}{m}^2$