What is the required height range for the top edge of a guardrail above the platform surface?

The required height range for the top edge of a guardrail above the platform surface is established to ensure safety by providing an adequate barrier for individuals working at heights. For many construction and occupational safety standards, including those described by OSHA, the appropriate height for a guardrail is typically around 39 to 45 inches. This range effectively helps prevent falls by creating a physical boundary that a person is less likely to cross unintentionally.

In this case, the answer indicates a range of 38 to 45 inches, which encompasses the primary guidelines set forth for guardrail heights. This allows for some flexibility in meeting safety standards while maintaining effectiveness in preventing slips or falls from elevated surfaces. By adhering to this range, compliance with safety regulations is achieved, mitigating risks associated with working at height.

The other height ranges provided in the options fall outside the established guidelines, which is why they are not considered correct. Understanding the importance of guardrail height aids in ensuring safety on work sites, contributing to the overall well-being of workers.