If wire rope guardrails are used, they must also be clearly flagged for visibility , typically with highly visible (often red or other bright‑colored) flagging spaced at regular intervals, such as every 6 feet, so workers can easily see the wire and avoid walking or backing into it.

Quick Scoop

When wire rope is used instead of solid rails, it can be hard to see, especially in low light or busy work areas. To reduce the risk of someone accidentally walking into or tripping over the rope, safety guidance requires adding high‑visibility flagging along its length at set intervals (commonly every 6 feet).

In practical terms, that means:

  • Attaching bright, contrasting flags or markers along the wire rope.
  • Keeping spacing consistent (about every 6 feet is a common requirement in OSHA‑aligned guidance).
  • Ensuring the guardrail still meets strength and height criteria like any other guardrail system (e.g., being able to withstand 200 lb of force and maintaining proper top‑rail height).

A simple way to remember it:

Wire rope guardrails = not enough alone → add high‑visibility flagging at regular intervals so everyone can clearly see the barrier.

Information gathered from public forums or data available on the internet and portrayed here.