North Carolina Building Contractor License Practice Exam

What is the minimum thickness required for parapet walls?

1. 1/4 inch

2. 1/2 inch

3. 1 inch

4. 2 inches

The correct answer is: 1/2 inch

Parapet walls are commonly used in construction as extensions of wall surfaces above the roofline. The required thickness of parapet walls is crucial for structural integrity, weather resistance, and aesthetic considerations. A thickness of 1/2 inch is the minimum thickness needed to ensure that the wall is strong enough to withstand wind forces, is durable against the elements, and meets safety standards. This thickness provides adequate support while also being manageable for construction and material efficiency. Thinner walls may not provide the necessary strength or may compromise safety and long-term performance. Choosing a minimum thickness that is too thin, such as 1/4 inch, would likely lead to issues with stability, increased risk of damage from environmental factors, and overall unsatisfactory performance of the parapet. The other options, such as 1 inch and 2 inches, may be adequate or even preferable in certain circumstances but exceed the minimum requirement. Maintaining a minimum thickness ensures compliance with building codes and safety regulations, making 1/2 inch an appropriate standard for parapet walls.