North Carolina Building Contractor License Practice Exam

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At what height above grade are guardrails required on open sided walking surfaces?

  1. 30 inches

  2. 36 inches

  3. 42 inches

  4. 48 inches

The correct answer is: 42 inches

Guardrails are required on open sided walking surfaces that are elevated at a height of 42 inches above grade. This height is consistent with safety standards established in building codes, which aim to prevent falls and ensure the safety of individuals using these surfaces. A guardrail at this height provides a sufficient barrier to reduce the risk of falls from elevated areas such as balconies, stairs, and unprotected edges. The 42-inch requirement strikes a balance between being tall enough to provide safety without being excessively high, which could make it difficult for people to use safely or easily interact with the space. Understanding these safety regulations is crucial for contractors and builders as they design and construct buildings, ensuring they comply with legal requirements and create safe environments for users.