Aftermarket Services

Ramptech: Focused on providing quality aftermarket services and customer support.

Holden America’s Grip-Lock™ and Grate-Lock® Chock systems are in service daily on every freight railroad in North America. Since 1993, Ramptech, Inc has served as the exclusive aftermarket distributor and reconditioning center on Holden America’s behalf. Ramptech specializes in the timely reconditioning and replacement of damaged Grip-Lock™ and Grate-Lock® Chocks. Ramptech also provides all of the necessary components to maintain Holden’s Chock Systems including the new Grip-Lock™ Chock, Grate-Lock® Chocks and all Block-Chock supplemental chock systems. Ramptech’s primary focus is to deliver a quality customer experience. Ramptech is committed to shipping purchase orders within 24 hours of receipt and providing hands-on training and aftermarket support and service.

Support & Training

  • Reconditioning Services for Grip-Lock™ and Grate-Lock® Chocks
  • Pre-tripper, loading, and unloading ramp facility training
  • Our personnel visit ramp facilities throughout North America and are qualified to provide training during these visits
    • Additional or refresher training is available upon request
  • Multilingual support available in English, Spanish, French
  • Technical and engineering support available

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Field Inspection & Repair

The effectiveness of Holden America Chock Systems’ ability to restrain vehicles during transit is maximized through proper inspection of the chocks. These inspections are performed at all points of the vehicle shipment process–pre-trip, loading, and unloading. Chocks deemed damaged or inoperable should be removed from the rail car and replaced with serviceable chocks of the same design, as per the AAR Office Manual, Appendix B Rule 1 . Depending on the severity of the damage on the rejected chock, it can either be repaired in the field or returned to Ramptech for reconditioning. The Holden America Chock Inspection and Repair Decision Matrix Standards listed below provides the OEM field inspection guidelines.

Inspection guidelines



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*Parts needed for field repairs are available through Ramptech aftermarket sales.