WAC 296-54-57340. Logging machines—A-frames

(1) A-frames must be guyed or braced to provide stability and prevent tipping. (2) A-frame bases must be secured against displacement and the tops must be securely bolted or lashed to prevent displacement. (3) Where guylines are used, A-frames must have at least one snap guy and two guylines securely attached, anchored and spread to form an angle 70 degrees to 90 degrees opposite the direction of stress or strain.