FRP systems are now becoming a widely accepted method of strengthening concrete structures. The acceptance and utilization of these new strengthening techniques depend on the availability of clear design guidelines, installation procedures and construction specifications. Standard specifications exist for all commonly used traditional materials in civil engineering structures. At this time, design specifications for FRP use are still under development. This paper presents an overview of the state-of practice of existing analytical and experimental studies on the use of FRP for shear strengthening of RC and PC girders. A summary of current design guidelines as a result of these studies will also be outlined. A statement of current research needs will then be provided.