Final answer:
The guardrail's midrails, screens, mesh, and structural members must be capable of withstanding a specified force for safety purposes, but the correct answer is not provided in the given reference information.
Step-by-step explanation:
The capacity of guardrail midrails, screens, mesh, and structural members to withstand a certain amount of force is important for ensuring safety in various settings, such as construction sites. These components must be sturdy enough to protect against falls and other hazards. The correct answer to the question of how much force these safety features must be able to withstand is not provided in the reference information given, as it relates to physics concepts and example scenarios unrelated to the specific requirements for guardrails.