Final answer:
Fall protection such as a guardrail system or a personal fall arrest system is required for scaffolds more than 10 feet above a lower level to ensure the safety of the workers.
Step-by-step explanation:
A guardrail system or a personal fall arrest system is required for scaffolds more than 10 feet above a lower level. This is a safety requirement to protect workers from the risk of falls from elevated work surfaces. The Occupational Safety and Health Administration (OSHA) has established guidelines which state that fall protection must be provided for workers on a scaffold more than 10 feet above a lower level to prevent fall-related injuries and fatalities.
A guardrail system or a personal fall arrest system is required for scaffolds more than 10 feet above a lower level. This means that whenever a scaffold is elevated at a height greater than 10 feet, either a guardrail system or a personal fall arrest system must be in place to prevent falls.