Massachusetts Unrestricted Construction Supervisor License Practice Test

What is the maximum riser height allowed in a single-family dwelling?

1. 7 inches

2. 7.5 inches

3. 8 inches

4. 6 inches

The correct answer is: 7.5 inches

The maximum riser height allowed in a single-family dwelling is 7.5 inches. This standard is in place to ensure safety and accessibility in residential stair construction. A riser height greater than 7.5 inches can make stair climbing more difficult and poses a greater risk of trips and falls, especially for children, the elderly, or individuals with mobility challenges. By adhering to the 7.5-inch maximum, builders create a more consistent and manageable stairway, which is essential for safety in everyday use. The residential building codes emphasize uniformity in riser heights across a staircase, which is important for predictable foot placement and balance when ascending or descending. Thus, maintaining this maximum height is crucial for meeting safety regulations and providing comfort in a home environment.