If wire rope guardrails are used, they must be flagged with highly visible materials at least every six feet along the length of the rope. Additionally, the wire rope must be at least 1/4 inch thick to prevent cuts and lacerations, and the guardrail system must meet standard height and strength requirements, including a top rail height of 39 to 45 inches and a midrail installed approximately midway between the top rail and the working surface. The system must be smooth to prevent injuries and capable of withstanding prescribed forces for safety. These measures ensure the wire rope guardrails are clearly visible and provide effective fall protection.