Foundation Drill Shafts, Inc. specializes in drilling shafts for multiple uses. Otherwise known as caissons, drilled shafts are cast-in-place deep foundation elements constructed using an auger, prominently featured in our logo. A hole is first drilled to the desired design depth, with it having the design diameter of the planned shaft. To assist in keeping the hole open, casing or drilling fluid can be used. Full-length reinforcing steel is lowered into the hole and then, the hole is filled with concrete. This finished foundation element resists uplift, compressive, and lateral loads and this technique has been used to support towers, tanks, buildings, and bridges.