Definition(s)
Guyline
Wire rope(s) that is attached to elevated structures, such as derricks or mast, and ground anchors for stability. See API Recommended Practices 4A, 4D, 4E, 4F, 4G, and 9B.
Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global Standards