Home Inspection State Practice Exam

What is the maximum acceptable variation in riser heights within a flight of stairs?

1. 1/4 inch

2. 3/8 inch

3. 1/2 inch

4. 3/4 inch

The correct answer is: 3/8 inch

The maximum acceptable variation in riser heights within a flight of stairs is 3/8 inch. This standard is crucial for ensuring safe stair construction and usability. When risers are inconsistent in height, they can create tripping hazards, as users may not be prepared for a sudden change in elevation, especially when ascending or descending the stairs. Building codes and safety regulations emphasize that the rise of each stair should be uniform to allow for a predictable and comfortable user experience. A variation greater than 3/8 inch could significantly increase the risk of accidents, particularly for individuals who may have mobility challenges or are distracted while using the stairs. Maintaining this measurement not only adheres to safety standards but also promotes good workmanship and quality in construction practices. By ensuring that the maximum variation in riser heights does not exceed 3/8 inch, builders and inspectors can help create a safer environment for those using the staircase.