A square footing is to be designed to carry a column load of 1,000 kN (including the weight of the foundation). The footing will be installed at a shallow depth on clay soil whose undrained shear...

A square footing is to be designed to carry a column load of 1,000 kN (including the weight of the foundation). The footing will be installed at a shallow depth on clay soil whose undrained shear strength (cohesion) is 96 kPa. Assume that the angle of internal friction is zero. The water table is deep. The soil rigidity index value is 30. If a factor of safety of 3 is used with the extended general bearing capacity equation, what size footing should be provided?