A column section given below is under the effect of combined axial load and bending moment. If the axial load Nd- 480 kN and bending moment about x axis Mxd= 198 kN .m. calculate the required amount of longitudinal steel. Materials are C30/37 and B420C. Concrete cover is 30 mm . Lutten bivini seçin: *4995 b. 21699 C. 30452 d. 23014 e. 20351