The ULTIMATE DESIGN LOAD, $P_{ud}=400$ kips. The Column Dimensions are $2$ feet by $2$ feet. The effective depth of the concrete footing is $21".$

If $q_{\text{a}\text{l}\text{l}\text{,}\text{n}\text{e}\text{t}}=6250psf,$ check the safety against bearing capacity failure.

Unsafe with a factor of safety less than $3\mathrm{.}0$

The stresses are nonuniform for this particular case

$33$

$34$

Almost safe

Safe with a factor of safety much greater than $3\mathrm{.}0$

The bearing capacity is always safe