Answer :

Final answer:

A guardrail must include toeboards, posts, and proper structural strength besides a toprail and midrail to ensure safety and prevent falls.

Explanation:

Besides a toprail and midrail, a guardrail must also have toeboards, posts, and proper structural strength to prevent falls and ensure safety. The toeboard is particularly important as it prevents objects from falling over the edge, which could pose a hazard to people or vehicles below. Given scenarios where falling off is a concern, such as at construction sites or elevated work platforms, these components are vital for maintaining a safe working environment and meeting safety specifications.