Example $4$

The rectangular section shown in figure resists a bending moment of $170kN.m,$

and shear of $160$ kN and a torsional moment of $10kN.m.f_{yv}=250\frac{N}{m}{m}^2$ for the

stirrups, $f_y=460\frac{N}{m}{m}^2$ reinforced steel and $f_{cu}=30\frac{N}{m}{m}^2$