What is the maximum height of un-reinforced masonry parapet walls in relation to their thickness?

The correct answer reflects the standard set forth in building codes regarding the structural limitations of un-reinforced masonry parapet walls. According to the North Carolina Residential Code, un-reinforced masonry parapet walls should not exceed a height that is more than two times their thickness. This guideline ensures that the walls maintain structural integrity and stability, preventing issues such as cracking or collapse due to factors like wind pressure and other loads.

Understanding this relationship between height and thickness is critical for ensuring safety and durability in the design of masonry components in construction. If the height were to exceed this proportion, it could compromise the wall's performance under various stress conditions, which would not be permissible according to building regulations that emphasize structural soundness and long-term resilience.