StopCrackEX – Cold Bolt Expansion Equipment For Arresting Cracks
Many fatigue cracks in bridges and other metal structures are drill stopped to repair them, however, drill stopping may only stop a crack from growing for a short time.
FTI’s StopCrackEX™ System cold expands a pre-fitted, lubricated bushing into a drill stop, supporting the hole and imparting residual compressive stresses around it, protecting it from cyclic loads.
This large zone of residual compression around the drill stop greatly reduces or arrests crack growth, even when the drill stop misses the tip of the crack. Independent, third-party testing has shown that this repair method can extend the fatigue life of the drill stop by over ten times.