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The PANDROL^® Zero Longitudinal Restraint system is designed to keep track forces from being transmitted to bridge structures. The ZLR system utilizes a PANDROL 'PR' 633A clip and a special intermediate toe plate between the top of the base of the rail and the toe of the clip. This provides a clearance that permits rails to move longitudinally, while holding them vertically in place. The ZLR system provides lateral restraint and prevents rail rollover.





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