Take the column length as $8\mathrm{.}8$ m

A steel column of a section UB$406$x$178$x$60$ was exposed to a fire situation.

Knowing that the column was loaded up to $60\%$ of its loading capacity and was

restrained against its axial expansion with a restraint degree $=0\mathrm{.}1.$ :

$1.$ Using EC$3$ calculate the axial restraint force generated in the column under

temperatures $($between room temperatures and $900$C$).$ Plot a

temperature$-$restraint force curve.

$2.$ Using BS$5950$ part $8$ check whether the column is fit for $30$ minutes fire

exposure