Extracted text: 5. An 18" square solid concrete pile is driven with an impact hammer to a depth of 55ft below grade into the soil conditions below. Calculate the (Qultimate) and (Qallowable) assuming a FOS of 2, assume groundwater is at the surface. Show all work use Alpha and Meyerhof methods. Oft NC Clay Ysat = 135 pcf c = Su = 900psf 55ft Sand Kat = 130 pcf Phi = 38deg 80ft 6. All things being equal for the above problem use the Coyle and Castello method and find (Qultimate) and (Qallowable)