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Fatigue Technology Inc.'s RailTec™ System is based on its patented split sleeve cold expansion which increases the life of a bolt hole by producing a zone of residual compressive stresses around the hole. This zone protects the hole from stresses applied to the rail end and significantly decreases the probability of fatigue cracks, the company says. The cold expansion process, when applied to typical rail stock, increases the life of the bolt hole by at least 3:1, the company says. The use of RailTec can result in decreased maintenance and inspection costs, less replacement of cracked rail, and an increase in the safety of the track, the company says.