$4-$ A strip footing should be constructed in a sandy soil $(c^{\text{'}}=0).$

Given: unit weight $=115pcf,{}^{\text{'}}=30$ deg., embedment depth $(D_f)=2\mathrm{.}0ft,$ footing width$=3\mathrm{.}0$ ft $,$ Factor of Safety$=3\mathrm{.}0$

Calculate allowable bearing capacity$).(4$ points$)$

$Nc=37\mathrm{.}16,Nq=22\mathrm{.}46,N=19\mathrm{.}13$

Qall $($kips$)$