A W$-$section is to be selected to support a concentric axial compressive load of P$\_($f$)=3200$kN$.$ The

member is $5$ m long and is to be fixed top and bottom $($Hint: check k $).$ Select the lightest available W$-.$ written solutions only

section using G$40\mathrm{.}21350$W steel material given that the column depth, d$,$ must be no more than $275$

mm in order for the column to fit inside an architectural surround. written solutions only