As per under working stress design, the condition to be satisfied for members subjected to both axial tension and bending is : \(\frac{{{{\rm{f}}_{\rm{c}}}}}{{{{\rm{f}}_{{\rm{at}}}}}}{\rm{\;}} + {\rm{\;}}\frac{{{{\rm{f}}_{{\rm{bty}}}}}}{{{{\rm{f}}_{{\rm{abty}}}}}}{\rm{\;}} + {\rm{\;}}\frac{{{{\rm{f}}_{{\rm{bt}}}}}}{{{{\rm{f}}_{{\rm{abt}}}}}}\)(where notations f_t and f_at : actual and permissible tensile stress; f_bt : actual bending stress; f_abt : permissible tensile stress under bending only; y and z major and minor axis)