North Carolina Building Contractor License Practice Exam

What is the minimum thickness of a parapet wall?

1. 12 inches

2. 18 inches

3. 24 inches

4. 30 inches

The correct answer is: 24 inches

A parapet wall, which is a barrier that extends above the roofline, typically serves both a functional and an aesthetic purpose. It is crucial in ensuring safety, particularly in providing fall protection and acting as a wind barrier on flat roofs. The minimum thickness of a parapet wall is generally governed by building codes and best practices, which emphasize structural integrity and durability. A thickness of 24 inches is often specified to accommodate various factors, including wind loads, drainage, and the potential for future modifications or attachments such as signage or safety equipment. A thicker wall also serves to enhance the wall's ability to withstand environmental stresses, ensuring it remains stable over time. In contrast, options for lesser thicknesses may not provide adequate support or safety, especially in regions prone to harsh weather conditions. Thus, adhering to the established minimum of 24 inches is critical for compliance with building regulations and for the overall safety of the structure.