Aldon wheel chocks meet OSHA regulations §1910.110 (15); 1910.111 (13); 1910.30 (A) (5)

OSHA regulations require that car brakes are applied and a wheel chock is in place before a car can be safely worked. Set the car brake first and then install the wheel chock. A chock alone will not hold the car. Use two (2) chocks per car being chocked. If your track has a dip or a hollow, you may have to take additional precautions.