(Solved): A square footing is to be constructed as shown in the Figure below. The design load, \( Q \) design ...

A square footing is to be constructed as shown in the Figure below. The design load, \( Q \) design is 9,000 pounds. The depth to the base, \( D_{f}=4 \) feet. The subsoil consists of a uniform deposit of soft, loose soil, and the data are provided below. Determine the dimension of the footing, \( B \) if a factor of safety of \( 2.5 \) is used. \( 3.5 \mathrm{ft} \). \( 4.0 \mathrm{ft} \). \( 45 \mathrm{t} \).