FLEXIBLE footing: Contact PRESSURE is UNIFORM.For Rigid footing: Settlement is uniform TYPE of Footing and SoilSettlement and contact pressureRigid footing and sandSettlement : UniformContact Pressure: Zero at edges and maximum at centerRigid footing and ClaySettlement : UniformContact Pressure: maximum at edges and minimum at center.Flexible footing and sandSettlement: Maximum at edges and minimum at center.Contact Pressure: UniformFlexible footing and ClaySettlement : Minimum at edges and maximum at centerContact Pressure: UniformHence it can be seen that the contact pressure for a rigid footing resting on CLAY at the centre and the edges is minimum and maximum respectively