According to the code, what is the minimum allowable height of a guardrail at a restaurant deck or commercial building?

The minimum allowable height of a guardrail at a restaurant deck or commercial building is 42 inches. This height is specified in building codes to ensure the safety of individuals using the space, as guardrails are designed to prevent falls from elevated surfaces. A height of 42 inches provides an adequate barrier for adults and helps to reduce the risk of accidents, especially in environments where people may be more active, such as a restaurant deck.

This height has been established based on safety standards that consider factors such as the average height of most adults and the potential for leaning or climbing, which are common behaviors in public spaces. The height of 42 inches balances effective fall protection with practicality, ensuring that the guardrails do not obstruct views or create an unwelcoming environment.