6.9. A column foundation (Figure P6.9) is 3 m x 2 m in plan. Given: Df = 1.5 m, O = 25°, d = 70 kN/m².Using Eq (6.28) and FS = 3, determine the net allowable load [see Eq (6.24)] the foundation could carry.

Fig: 1

Fig: 2