The drilled shafts of caissons typically range in diameter from 30" (750 mm) up to 120" (3040 mm). Caissons may be reinforced or unreinforced depending on the loading conditions. After cleaning and inspection the shaft is filled with concrete. The tooling for caissons is typically based on 6" (150 mm) increments.

The Anchor Group has the ability to modify existing equipment and customize drilling tools to suit specific conditions which make caissons a viable foundation option even in very difficult rock and soil conditions. We have an extensive inventory of steel casings, rock and soil augers, belling tools, twist buckets, drilling buckets and core barrels. We can supply drill rigs and support equipment to allow the work to be completed efficiently and cost effectively.