PROBLEMS Answer $12\mathrm{.}1$

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

$100$l$($b$)/($f$)$t$^(3).$

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

$($Answer to Problem $12\mathrm{.}1$: $15-$in$.$ footing, $10$ ft $3$ in $.$ wide with #$7$ bars @ $9-$in$.$ main steel$)$

Answer question $12\mathrm{.}1$