Prestressing of bridge decks is a concept with potential benefits in both economy and improved durability. This paper summarizes the major design related observations and conclusions from an extensive experimental and analytical study conducted to develop criteria for design of durable prestressed bridge decks. General provisions for design of prestressed composite girder-slab bridge decks are presented. Although the experimental research and testing was directed at cast-in-place posttensioned decks on precast concrete girders. these provisions are valid for prestressed decks on steel girders and panelized deck systems on either concrete or steel girders. The design provisions are presented in the form of suggested AASHTO Bridge Design Specification changes based on a synthesis of the findings from both the durability and structural phases of the study. An example showing the practical application of the proposed recommendations is included.
