CDPH Lead Inspector/Assessor California State Practice Exam

What are the components of a stair tread?

1. The vertical support of the staircase

2. The horizontal surfaces that are stepped on

3. The decorative trim of the staircase

4. The part of the staircase that connects to the wall

The correct answer is: The horizontal surfaces that are stepped on

The correct answer highlights the fundamental aspect of a stair tread, which refers specifically to the horizontal surfaces that individuals step on when using a staircase. This component is crucial for ensuring safety and accessibility, as it provides the necessary space for foot placement and contributes to the overall structure of the stairway. Understanding the function of a stair tread is essential in both construction and safety assessment contexts, especially in evaluating potential hazards or compliance with building codes. For instance, if the treads are worn down or not of adequate width, they could pose a tripping hazard. The other options refer to different parts of a staircase, such as the vertical support structures, decorative features, or elements connecting to walls, which do not accurately describe what constitutes a stair tread. Focusing on the definition and function of the tread clarifies its importance in the context of stair design and safety evaluations.