Quostion $3(33$ marks$)$A simply supported plate girder $1820$x$500(12$W$,25$F$)$ is laterally unrostrained and supports pointloads at ULS as shown in Figure $3($all dimensions in mm$).$ Torsional and simple restraints areprovided at the supports, Assume grade $300$W steel. $($Neglect selfweight of the beam$),$ Lateralrestraint is provided to the compression flange of the beam at $"$X$".$ Assume all loads to bedestabilizing. Check segment A$-$C for flexure$\mathrm{.}810$ RN$182600(2,251)1500060)$ NFigure $3900$ KND