Abstract: Shear strength of concrete is one of the most critical design requirements in reinforced concrete design. Because of this special requirement the reinforced concrete researchers are continuously review the depended shear design formulas to predict better formulas with a high degree of confidence. In this research, based on an experimental data base from the literature with a total number of 175 beam specimens and using the stepwise regression a testing model is predicted to evaluate the ACI shear provisions for beams without web reinforcement. The squared coefficient of correlation R² of the predicted model is 0.934. The results show that the predicted model is adequate as a testing or an evaluation formula. The ACI provisions are found to be conservative for the full range of span to depth fc(a/d) ρ_w . While for width b and depth d, the ACI can be considered as conservative up to specific points and unsafe beyond specific points.