North Carolina Building Contractor License Practice Exam

What is the minimum height that guardrails must be?

1. 36 inches

2. 42 inches

3. 48 inches

4. 54 inches

The correct answer is: 42 inches

In construction and safety standards, guardrails are critical for preventing falls and ensuring the safety of workers and occupants. The minimum height for guardrails is established to provide adequate protection for those on elevated surfaces. A guardrail must be at least 42 inches high to effectively mitigate the risk of falls, as this height has been determined to reduce the likelihood of individuals toppling over the edge. The 42-inch standard is widely accepted in various building codes and safety regulations, including the Occupational Safety and Health Administration (OSHA) guidelines. This height allows the guardrail to be tall enough to adequately protect adults while maintaining a level that is not excessively high, which could complicate access and safety. Understanding these standards is crucial for compliance during construction and renovations, ensuring that all structures meet the necessary safety requirements to protect individuals working at elevated heights.