Stability functions for beam-column supported on continuous Winkler foundation or driven into elastic soil are developed and tabulated for different values of axial load parameters and soil stiffnesses. They enable the rapid prediction of the elastic critical load of structures with some members supported by or driven into soil, having constant modulus of subgrade reaction, using a hand-computing method. Applicable to
bearing piles and other related structures with full or partial penetration with any ends restraints. Approximate formulae for the stability functions are derived.