This paper reports a re-appraisal of available shear friction test data and presents simple, modified shear friction equations suitable for use in design. These equations reflect the influence of concrete strength on shear friction strength. They enable full advantage to be taken of the potentially high-shear-friction strengths of very-high-compressive strength concretes over the whole range of values of the shear friction reinforcement yield strength. This results in a reduction in the amount and the congestion of reinforcement in precast concrete connections and bearing details.