North Carolina Building Contractor License Practice Exam

What is the maximum height for thresholds at doorways for sliding doors above the finished floor or landing?

1. 10 inches

2. 15 inches

3. 7 inches

4. 5 inches

The correct answer is: 15 inches

The maximum height for thresholds at doorways for sliding doors above the finished floor or landing is 15 inches. This regulation is important for ensuring accessibility and safety. A threshold that is too high can pose a tripping hazard, particularly for individuals with mobility challenges, including those using wheelchairs or other assistive devices. By establishing a maximum height, building codes aim to promote ease of access while maintaining structural integrity and functionality of the sliding doors. The 15-inch limit allows for some design flexibility while conforming to safety standards. It ensures that thresholds remain navigable for most individuals, facilitating safe entry and exit through these doorways.