Calculating Shear Friction Using an Effective Coefficient of Friction

This paper examines the current formulas used for the calculation of the effective coefficient of friction μ e 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 μ e . These modifications are consistent with the spirit of the original test data and formulas developed by A. Fattah Shaikh and Charles Raths. tions are consistent with the spirit of the original test data and formulas developed by A. Fattah Shaikh and Charles Raths.