A foundation pile or pile segment is described that provides support for a
structure such as a building foundation. The pile includes a generally
solid body having a top end wall, a bottom end wall adapted for providing
end load bearing capacity, and all around sidewalls. The sidewalls extend
between the top end wall and the bottom end wall and has at least a pair
of oppositely disposed spiral ridges that extend generally about the
surface of the sidewalls. Further, each spiral ridge extends in a
generally spiral direction from the top end wall to the bottom end wall.
The spiral ridges provide an offset surface that extends generally
outward from the surface of the sidewalls. The offset surfaces provide
additional load bearing capacity to the foundation pile.