Wheel Chocks Ask An Expert Request a Quote Request Service Or give us a call: 1-888-606-9415 Wheel chocks are simple wedge-shaped devices placed in front of a trailer’s wheels that impede the trailer from easily moving. Trailer wheel chocks are a cost effective method of satisfying the OSHA requirement that all vehicles be restrained during loading and unloading operations. For loading docks where traffic volumes cannot justify a more sophisticated safety solution, wheel chocks can provide a cost effective method of improving worker safety while satisfying OSHA regulations.