Solve problem $12\mathrm{.}6$ only

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.

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

$($Answer to Problem $12\mathrm{.}3$: $15-$in$.$ footing. $7$ ft $6$ in $.$ wide with $\backslash$#$5$ bars @ $6-$in$.$ main steel$)$

$($Answer to Problem $12\mathrm{.}5$: $10-$in$.$ footing, $4$ ft $0$ in $.$ wide with $\backslash$#$5$ bars $($@ $\backslash (15-\backslash$mathrm$\{$in$\}\backslash ).$ main steel$)$

Problem $12\mathrm{.}6$ Repeat Problem $12\mathrm{.}1$ if a masonry wall is used.