OAR 437-007-0550: Vehicle Guards and Controls

(1) Vehicles with dump bodies must be equipped with a permanently attached, positive means of support that is capable of being secured in position to prevent the accidental lowering of the dump body. (2) Devices for supporting dump bodies must be used when: (a) The dump body is raised and left unattended. (b) Maintenance or inspection work is being done. (3) Operating levers controlling hoisting or dumping devices on haulage bodies must be equipped with a latch or other device which will prevent accidental starting or tripping of the mechanism. (4) Trip handles for tailgates and belly dump trailers must be located so personnel are in the clear when dumping. (5) All vehicles whose payload is loaded by means of cranes, power shovels, loaders or similar equipment must have a cab shield or canopy adequate to protect the operator from shifting or falling materials. (6) The backs of vehicle cabs which are exposed to shifting loads must be provided with a substantial bulkhead or similar device.