A rectangular footing of $\frac{L}{B}=1\mathrm{.}2$ has to be constructed in sandy soil with $c^{\text{'}}=0.$ The

footing depth is $4ft,$ the GWT is $2ft$ below the ground surface. The effective friction

angle of the sand is $34.$ The unit weight of the soil above GWT is $105l\frac{b}{f}{t}^3,$ and below

GWT it is $118l\frac{b}{f}{t}^3.$ The vertical load from the column on the footing base is $150,000$

$lbs,$ including the weight of the footing. Using an $FS=3,$ determine the safe dimensions of

the footing, $BL.$