This paper examines the current formulas used for the calculation of the effective coefficient of friction μe in PCI Design Handbook: Precast and Prestressed Concrete. It is not a commentary on the underlying methodology, but an examination of the original test data compared with these equations. Several mathematical modifications and clarifications are recommended to the formulas in the calculation of μe. These modifications are consistent with the spirit of the original test data and formulas developed by A. Fattah Shaikh and Charles Raths.
