The permissible design stresses for an RCC Column under different conditions are given below: 1. If minimum eccentricity is considered to be Zero i.e. emin=0 a. Permissible axial compressive stress in concrete = 0.45 fck b. Permissible axial compressive stress in steel = 0.75 fy 2. If minimum eccentricity effect is considered: a. Permissible axial compressive stress in concrete = 0.4 fck b. Permissible axial compressive stress in steel = 0.67 fy Note: In RCC beam subjected to bending, shear and torsion, the permissible values in steel and concrete are: a. Design strength of concrete in flexure = 0.45 fck b. Design strength of Steel in tension = 0.87 fy