Guardrails must withstand what minimum downward and outward force applied from the top rail?

The correct answer reflects the safety standards set for guardrails, which are designed to protect workers from falls while working at heights. According to OSHA (Occupational Safety and Health Administration) regulations, guardrails must be able to withstand a minimum force of 200 pounds applied downward and outward from the top rail. This requirement ensures that guardrails provide a reliable level of protection and stability, helping to prevent injuries in the workplace.

Selecting the appropriate force is crucial because guardrails are often the first line of defense against falls. A force of 200 lbs ensures that the rail will remain intact under the pressure of a worker leaning against it or during incidental impacts. The specified force is part of the overall guidelines for fall protection systems, which aim to reduce the risk of accidents and enhance worker safety. Understanding these standards is vital for those involved in planning, installing, and maintaining workplace safety systems.