According to federal OSHA safety standards, scaffolds exceeding what height must be designed by a professional engineer?

Scaffolds that exceed a height of 125 feet must be designed by a professional engineer, according to federal OSHA safety standards. This requirement ensures that structures used for work at significant heights are engineered to meet specific safety criteria capable of supporting loads and resisting forces, which is critical to prevent accidents and maintain worker safety. Designing such tall scaffolding involves complex considerations regarding structural integrity, load distribution, and environmental factors, which is why the expertise of a licensed professional engineer is mandated. This requirement helps ensure that high scaffolding can safely support the workers and materials while reducing the risk of collapses or other failures that could lead to serious injuries or fatalities.