$386$

CHAPTER $12$ Footings $($do problem $12\mathrm{.}1$ only please$)$

PROBLEMS

For Problems $12\mathrm{.}1$ to $12\mathrm{.}30,$ assume that the reinforced concrete weighs $150l\frac{b}{t^3},$ plain concrete weighs $145l\frac{b}{t}{t}^3,$ and soil weighs $100l\frac{b}{f}{t}^3.$

Wall Footings

For Problems $12\mathrm{.}1$ to $12\mathrm{.}5,$ design wall footings for the values given. The walls are to consist of reinforced concrete.

$\backslash$table$[[$Problem no$.,$Wall thickness $($in$.),$D $($N$/$i$),$L$,($k$/$i$),$titai$),$f$,($ks$),4_a(ks{)}^{**},$Distance from bottom of footing to final grade $($ti$)],[-12\mathrm{.}1,14,15,12,4,60,3,3],[12\mathrm{.}2,14$By$,21,2,4,60,4,4],[12\mathrm{.}3,15,15,18,5,60,5,5],[\frac{12\mathrm{.}3}{12\mathrm{.}4},15,24,30,4,60,4,4],[\frac{12\mathrm{.}4}{12\mathrm{.}5},12,10,8,4,60,5,4]]$