North Carolina Building Contractor License Practice Exam

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What is the maximum height for unreinforced masonry parapet walls relative to their thickness?

8 inches
6 inches
12 inches
10 inches

The correct answer is: 6 inches

The maximum height for unreinforced masonry parapet walls relative to their thickness is indeed 6 inches. This specification is based on structural safety considerations, as unreinforced masonry is not designed to bear heavy loads or withstand significant lateral forces. The height-to-thickness ratio is crucial to ensure that such walls maintain their integrity and do not fail under stress or during adverse weather conditions. An unreinforced masonry parapet wall that exceeds this height could be at risk of bending or collapsing, particularly under wind loads or other imposed loads. By limiting the height to 6 inches, building codes ensure that the walls remain stable and safe for both structural integrity and public safety. Understanding these limitations is essential for anyone involved in construction or building contracting, especially in North Carolina where specific codes guide the construction practices.