A simple method of design is developed for partially prestressed concrete beams based on both ultimate strength requirements and steel stress limitations under service loads. The steel stress can be regarded as an important parameter related to maximum crack width, fatigue strength, and deflection which depends on the degree of cracking. Direct equations are derived for calculating the required amount of prestressed and non-prestressed steel satisfying simultaneously the ultimate strength requirements and the steel stress limitations at service loads. A detailed numerical example is solved step by step to show the applicability of the proposed method.
