The design method used for pile caps relies heavily on the ACI 318-95, 99, and 02 codes. In some cases the ACI 318 code does not provide adequate guidance on the design of very thick pile caps. In these cases the CRSI Design Handbook 2002 is used:

"CRSI Design Handbook 2002" (CRSI-02), 2002, Concrete Reinforced Steel Institute, Schaumburg, Illinois 60173-4758