In this paper, the validity of some published shear strength formulae were examined against test results. Data of 56 pre-stressed deep beams were used to evaluate the accuracy of these formulae. Tested models included S. Teng et al. model, Tan and Mansur model, and K.H.Tan et al. as well as Guo-Lin et al. modified strut and tie model. The assessment of these models indicated some models to be conservative while other overestimated the shear capacity of the tested beams. The model developed by Guo-Lin et al. was found to be in a good agreement with test results.