Final answer:
When wire rope guardrails are used on walking working surfaces, it is important to have additional safety measures in place, such as toe boards or barriers. Regular inspections and maintenance of the guardrails should also be done to ensure their effectiveness.
Step-by-step explanation:
If wire rope guardrails are used in walking working surfaces, it is important to also have additional safety measures in place. One common requirement is the use of toe boards or other barriers that prevent objects from falling off the edge. This is done to protect both workers and pedestrians below from potential hazards. In addition, regular inspections and maintenance of the wire rope guardrails should be conducted to ensure their integrity and effectiveness.