California Residential Inspector Practice Exam

Are 2 x 3 wood studs allowed in exterior walls?

1. Correct

2. Incorrect

3. Only in specific conditions

4. Yes, with reinforcement

The correct answer is: Incorrect

In California, building codes require that exterior walls be constructed with materials that provide sufficient structural support, thermal performance, and moisture resistance. The use of 2 x 3 wood studs in exterior walls is typically not permitted due to their insufficient strength and rigidity to support the loads and stresses applied to exterior walls. Exterior walls need to withstand a variety of factors, including wind loads and seismic activity, all of which are especially significant in California. Standard practice usually favors the use of larger studs, such as 2 x 4 or 2 x 6 lumber, for exterior walls to ensure adequate structural integrity and energy efficiency. As a result, using 2 x 3 studs does not meet the established building codes for residential construction in most circumstances, reinforcing the understanding that such a configuration would not be acceptable.