Chapter 7, Problem 7.9QPP

A bearing wall carries a total unfactored load 220 kN/m. It is to be supported on a 400 mm deep continuous footing. The underlying soils are medium sands with $c\text{'}=0,\varphi \text{'}=37°,$ and $\gamma =19.2{\text{kN/m}}^{\text{3}}.$ The groundwater table is at a great depth. Using and ASD, compute the minimum footing width required to maintain a factor of safety of at least 2 against a bearing capacity failure. Express your answer to the nearest 100 mm.