Final answer:
1) Falling objects, The top edge of a guardrail must be at an appropriate height to provide fall protection, and it must also offer protection from falling objects, as per OSHA standards.
Step-by-step explanation:
The top edge of a guardrail must be from 39 to 45 inches above the walking/working level to prevent workers from falling. Along with fall protection, there must also be a means of protection from falling objects. This is an OSHA requirement designed to protect workers from various serious hazards, including those related to construction, general industry, maritime, and agriculture.
Employers are responsible for providing a safe work environment, which includes guardrails and other safety measures to prevent workplace injuries. For example, when working at heights, not only is fall protection critical, but also ensuring that workers are protected from potential falling objects that could cause injury.
Remember that in any working environment, especially one that involves elevated surfaces and risks of falling, strict adherence to safety protocols is essential for preventing accidents and ensuring the well-being of all workers on site.