The responses of the individual base and side components of O-cell load tests on drilled shaft foundations can be evaluated within an elastic continuum framework using results from seismic piezocone tests (SCPTu). The SCPTu is an optimal means for collection of geotechnical data because the same sounding can provides information on soil behavior at opposite ends of the stress-strain-strength curves, namely the peak strength for capacity and the small-strain stiffness (Gmax) for the initial deformations. Using a Randolph-type elastic pile model, a case study involving axial shaft response in stiff clay till is presented