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

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