Chapter 7, Problem 7.15QPP

A certain column carries a vertical downward load of 1,200 kN. It is to be supported on a 1 m deep, square footing. The soil beneath this footing has the following properties: $\gamma =20.5{\text{kN/m}}^{\text{3}},c\text{'}=5\text{kPa,}$ and $\varphi \text{'}=36°.$ The groundwater table is at a depth of 1.5 m below the ground surface. Using ASD, compute the footing width required for a factor of safety of 3.5.