SHEAR STRENGTH Design of cross section of member subjected to shear shall be based on vґ Where vґ=shear force at that section . Vn=nominal shear strength of the section. ў =strength reduction factor. The nominal shear stress Vn shall not exceed 0.2fc,1.1 √fc or 9MPA. Spacing limits for shear reinforcements shall be: 0.5d in non-prestressed member 0.75 h in prestressed member 600mm. Design of slab for two way action shall be based on Vn=Vn/bod Where vn shall not be greater than Vc Vc=0.17(1+2βc)√fc βc=shorter side/lon g side of the concentrated load Design the interior panel of flat slabs 6.6 x 5.6 m in size for a super imposed l oad of 7.75 KN/m^2.provide two way reinforcement. 23