National Home Inspector Practice Exam

What is the minimum width of stairways, excluding railings?

1. A) 27 inches

2. B) 36 inches

3. C) 42 inches

4. D) 44 inches

The correct answer is: B) 36 inches

The minimum width of stairways, not including railings, is set to ensure safe passage for individuals using the stairs, facilitating ease of movement and allowing for the potential of two people to pass each other comfortably. The requirement of a width of 36 inches is a common standard adopted in many building codes. This dimension strikes a balance between functionality and safety, providing adequate space without wasting materials or floor area. A width less than 36 inches might not accommodate larger items or the flow of multiple people, especially in residential buildings where families or groups might frequently use the stairs simultaneously. Therefore, a width of 36 inches is a widely accepted practice to optimize usability and safety in stair design.