Massachusetts Unrestricted Construction Supervisor License Practice Test

Which of the following does NOT comply with the building code requirements for stairways in a commercial building?

1. Handrail projections may not exceed 4.5 inches

2. Landings are required when vertical rise exceeds 12 risers

3. Riser height of 6 inches

4. Width not less than width of stairway served

The correct answer is: Landings are required when vertical rise exceeds 12 risers

The option stating that landings are required when vertical rise exceeds 12 risers is not compliant with building code requirements. The building code typically mandates that landings must be provided at certain intervals for safety and accessibility. In many building codes, including those relevant to Massachusetts, the requirement is that landings should be provided when the vertical rise exceeds 12 feet, not specifically 12 risers. This distinction is crucial as risers vary in height, meaning that the number of risers does not directly equate to a specific vertical rise. Maintaining appropriate landings ensures that there is enough space for resting and transitioning between flights of stairs. In contrast, the other options provided do align with building code regulations. Handrail projections that do not exceed 4.5 inches help prevent users from getting caught or blocked when using the stairs. A riser height of 6 inches is commonly accepted, as it provides a manageable step height, making stairs safer and easier to navigate. Ensuring that the stairway width is not less than the width of the stairway served promotes accessibility and safety, accommodating the expected flow of people using the stairs. Each of these requirements contributes to the overall design and safety of commercial buildings in relation to stairway compliance.