$CA2$

Design the reinforcement for a simply supported slab $220mm$ thick and spanning in two directions. The effective span in each direction is $4\mathrm{.}5m$ and $6\mathrm{.}3m.$ The slab supports a live load of $10k\frac{N}{m^2}.$ The characteristic material strengths are for concrete, $f_{cu}=30\frac{N}{m}{m}^2$ and for reinforcement steel $f_L=460\frac{N}{m}{m}^2.$