Residential Building Inspector Practice Exam

What is the maximum allowable length for a wall perpendicular to floor joists in a single-family dwelling using cold-formed steel wall framing?

1. 30 feet

2. 45 feet

3. 60 feet

4. 75 feet

The correct answer is: 60 feet

In residential construction, the maximum allowable length for a wall framed using cold-formed steel is determined by various building codes and standards that ensure structural integrity and performance. The choice of 60 feet as the maximum length for walls perpendicular to floor joists in cold-formed steel wall framing aligns with accepted engineering practices and the capabilities of the material. Cold-formed steel has certain properties, such as strength and rigidity, which allow it to support loads effectively over significant spans. However, longer wall spans can lead to stability issues and may require additional considerations for wind load, lateral support, and potential deflection. The 60-foot limit is an industry standard designed to balance efficiency in construction with structural safety. Beyond this length, walls may necessitate additional bracing or support to mitigate the risk of buckling or failure under load. Therefore, understanding the context of cold-formed steel wall framing limitations is essential for appropriate design and construction practices.