North Carolina Building Contractor License Practice Exam

What is the minimum required thickness of a masonry parapet wall used in a seismic zone?

1. 6 inches

2. 12 inches

3. 1 foot

4. 15 inches

The correct answer is: 6 inches

The minimum required thickness of a masonry parapet wall used in a seismic zone is 6 inches. This specification is based on building codes that aim to ensure stability and structural integrity during seismic events. A 6-inch thickness is deemed adequate to provide the necessary strength to resist various forces, including those exerted by earthquakes. Adequate thickness is vital for a parapet wall because it not only helps in handling lateral loads but also contributes to the overall design and performance of the building during seismic activities. Thicker walls, while potentially more robust, may not be required for all situations, particularly when considering the balance between structural performance and material costs. Compliance with local building codes, which typically set these minimums, is crucial for safety and resilience in construction. In seismic zones, understanding these requirements helps architects and contractors design buildings that can better withstand seismic forces, reducing the risk of failure during an earthquake.