OAR 437-007-1030: Log Truck and Trailer Hitches (Couplings)

(1) All log truck and trailer combinations must be equipped with couplings (hitches) that: (a) Will withstand, in any direction, the potential stresses imposed. (b) Have two independent locking devices that will continue working despite dirt and debris. (c) Remain securely locked. (d) Are attached to the truck frame or extension with at least four machine bolts (120,000 PSI or stronger), 3/4-inch or larger in diameter and secured with lock nuts. (2) Hitches (couplings) having parts that are broken, cracked, worn, deformed more than 1/4-inch or are otherwise defective must be removed from service until repaired to comply with the manufacturer’s specifications.