Waukegan, Illinois – Aldon has introduced a new type of wheel chock for railroad cars, made from polyurethane. It is designed to be used with freight cars, including tank cars, when hazardous material are being loaded or unloaded and a spark from a traditional steel wheel chock could ignite dust or fumes.
The Spark-Proof double wheel chocks are strong enough to block a tank car, and sufficiently resilient that the car can be pulled over the chock by a locomotive without derailing. In contrast, a steel chock needs to be removed, which can be difficult when they become stuck under the wheels.
The company says the polyurethane material is ideal as it combines excellent resistance to loads, with the ability to compress to half its original thickness, and then spring back into shape. It is resistant to most chemicals and corrosive materials. Moulded transverse ribbing squeegees out water and dirt from the rail surface to increase its holding power.
The 10cm high chocks are available in both exposed rail and flush rail versions, and the handles are 60 cm long. They weigh about 4kg.