Extracted text: 7.16 A 650-kN column load is supported on a 1.5-m wide by 2.0-m long by 0.5 m deep spread footing. The soil below is a well graded, normally consolidated sand with y = 17.0 kN/m' and the following SPT N60 values: Depth (m) 1.0 2.0 3.0 4.0 5.0 N60 12 13 13 18 22 The groundwater table is at a depth of 25 m. Using Schmertmann's method and hand compu- tations, compute the total settlement at t = 30 yr.