OAR 437-004-3550: Servicing Multi Piece and Single Piece Rim Wheels

(1) Workers must use a safety tire rack, cage, or equivalent protection over tires mounted on split rims with locking rings or similar devices, when: (a) Inflating tires; or (b) Adding air to tires on or off the vehicle if the tire was run while flat or if the rim or locking device was disturbed in any way. NOTE: A tire is flat if it has lost more than 50% of its normal pressure. (2) Airlines used to inflate tires must have clip-on chucks.