Data for all problems:

Concrete strength $f_c^{\text{'}}=25$MPa

Steel reinforcement strength $f_y=420$MPa

$4\mathrm{.}1$ It is required to design a reinforced concrete footing showing full details of dimensions ad steel reinforcement $($plans and sections$).$ Consider the following cases:

$($a$)$ The footing supports a brick$-$wall of thickness $300mm$ and subjected to a service load of $150k\frac{N}{m}$ at the ground level.

$($b$)$ The footing supports a reinforced concrete wall of thickness $200mm$ and subjected to service axial loads at the ground level as follows:

Dead load $=170k\frac{N}{m}$

Live load $=130k\frac{N}{m}$

In both cases, consider the depth of the footing below the ground level $D_f=1\mathrm{.}5m$ and the allowable bearing capacity $q_{\text{a}\text{l}\text{l}}=125k\frac{N}{m^2}.$m