Problem $3$

The inverted T$-$shaped cross$-$section is used to support a floor system composed of $200$ mm precast$/$prestressed

slab. The $100$ mm ledges are required to support the slabs. The concrete cover to the centroid of the compression

steel is $64$ mm and to the tension steel is $66mm.f_c^{\text{'}}=35$MPa.

Calculate the resisting moment of the cross$-$section. $($Ans: $M_r=575kN.m)$

All dimensions are in mm