These guide specifications are intended for use in the repair and strengthening of reinforced and prestressed concrete highway bridge elements using externally bonded fiber-reinforced polymer (FRP) composite systems. The guide specifications have been updated to better align with ACI 440 strain approaches, and major updates include the following:

Flanged sections in flexure
Prestressed concrete sections
Inclusion of factors to account for environmental exposure conditions
Near surface mounted (NSM) FRP designs
Design of end anchors
Detailing of laps and splices
Updated approach to FRP–concrete interface strain
Inclusion of design examples for shear and flexural strengthening, and confinement

These updated guide specifications also contain detailed design examples, reflecting the latest research and lessons learned from actual field deployments.