North Carolina Building Contractor License Practice Exam

What is the required flange size that must be maintained above the ground?

1. 2 inches

2. 3-1/2 inches

3. 4 inches

4. 5 inches

The correct answer is: 3-1/2 inches

The requirement for maintaining a flange size above the ground, specifically the 3-1/2 inches, is generally related to providing proper clearance and ensuring that the structure meets safety and structural integrity standards. A flange size of 3-1/2 inches is often mandated in building codes to avoid issues such as water damage, pest infestation, and structural deterioration. This height helps to ensure that the components of the structure, such as floor joists or beams, are elevated enough to prevent contact with moisture or debris on the ground, which can lead to conditions that compromise the durability of the building materials. Additionally, the specific height can be important for meeting local building practices, ensuring compliance with regulations designed to promote above-ground construction standards in various environmental conditions. This particular size is typically adequate for these purposes while balancing other considerations like material costs and structural design efficiency.