This paper describes a limited investigation of the stresses which occur in the ends of pretensioned prestressed concrete girders at the time of transfer of prestress, and which can result in the formation of horizontal cracks in the ends of such girders. Also reported is a study of the stresses set up in vertical stirrup reinforcement near the ends of pretensioned prestressed girders when horizontal end cracking does occur. On the basis of experimental data obtained in this study, an equation is proposed for the design of vertical stirrup reinforcement necessary to restrict the size of any horizontal end cracks which may occur in a pretensioned prestressed concrete girder.

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