A strip footing $2\mathrm{.}4m$ wide is founded at a depth of $2\mathrm{.}8m$ in a soil having the following properties: $c^{\text{'}}=12$kPa, and ${}^{\text{'}}=20,=19k\frac{N}{m^3}$

Determine $($a$)$ The net ultimate bearing capacity

$($b$)$ the design bearing capacity adopting a factor of safety of $3$

A square footing is to be founded to a depth of $2\mathrm{.}6m$ and will transmit a uniform load of $2\mathrm{.}6$ MN$.$ Adopting a factor of safety of $3,$ determine the required size of the footing. Soil properties are:

$c_u=64k\frac{N}{m^2},=19k\frac{N}{m^3}$

CEB $3319$ FOUNDATION ENGINERING