Which type of fall protection system must be designed by a qualified individual?

Horizontal lifeline systems must be designed by a qualified individual because they are complex systems that require careful consideration of various factors, such as the conditions of the work environment, the type of activities being performed, and the potential for fall hazards. A horizontal lifeline must be anchored securely to withstand the forces exerted in the event of a fall. This involves understanding load equations, proper material specifications, and relevant standards and regulations to ensure that the system will perform effectively and safely.

Unlike some of the other options, which can often be implemented with standard practices or equipment, horizontal lifelines involve a level of analysis and engineering that necessitates the expertise of a qualified individual. This is essential to ensure that the system adheres to safety standards and effectively protects workers from fall hazards.

Static anchor systems, temporary guardrails, and body harnesses, while still requiring attention to safety and proper use, typically do not present the same level of complexity that necessitates professional design and evaluation.