OAR 437-007-1515: Rigging Trees for Cable Logging Systems

(1) Yarding of any type must not be conducted within reach of the tree or guylines of a tree in which a climber is working. (2) When machines are used to hoist rigging: (a) A person must be assigned to transmit the climber's signals. (b) The signal person and machine operator must not perform other duties when the climber is in the tree. (c) Noisy equipment, such as power saws, tractors and other logging machines, must not be operated around the area where a climber is working when such noise will interfere with the climber's signals. (3) Lines attached to a tree in which a climber is working must not be moved except on a signal from the climber. (4) Unsecured equipment, rigging, or material must not be left in the tree.