CDPH Lead Inspector/Assessor California State Practice Exam

What is the primary function of a stair stringer?

1. To hold the railing in place

2. To provide structural support for the staircase

3. To add decorative elements to the staircase

4. To cover the gap between floors

The correct answer is: To provide structural support for the staircase

The primary function of a stair stringer is to provide structural support for the staircase. Stringers are the inclined boards that run along each side of the staircase, acting as the backbone that holds the treads and risers in place. They are essential for ensuring the stability and strength of the entire staircase system, enabling it to safely support the weight of people using the stairs. Without stringers, the treads would lack proper support, leading to unsafe conditions. Their design and construction are critical for maintaining the integrity of the stairway, making option B the correct choice. The other options do not accurately represent the primary role of stringers. While railings are important for safety, they are not the main function of the stringer. Decorative elements may enhance the appearance of stairs, but this is not their primary purpose. Covering the gap between floors is not a role associated with stringers, which are specifically focused on the structural support aspect of a staircase.