Compute the design crack width for a $200mm$ thick, $6\mathrm{.}5m$ span, simply supported one$-$way spanning slab. Assume the main tension reinforcement is H$12-125.$ Assume the slab carries its self$-$weight, an additional permanent load of $4k\frac{N}{m^2}$ and a uniformly distributed variable load of $5k\frac{N}{m^2}.$ The design crack width formulae are given in the Appendix at the end of the paper.

Assume: $,E_s=200k\frac{N}{m}{m}^2,E_{cm}=18k\frac{N}{m}{m}^2,($long$-$term value$),f_c=40\frac{N}{m}{m}^2,f_y=500\frac{N}{m}{m}^2,fc{t}_{ct}=3\mathrm{.}5\frac{N}{m}{m}^2,$ cover $=25mm$ and quasi permanent loading of $1\mathrm{.}0g{k}_k+0\mathrm{.}3qk$