North Carolina Building Contractor License Practice Exam

What is the required ratio for a handicap ramp from the top of the ramp to the bottom?

1. 1:8

2. 1:10

3. 1:12

4. 1:14

The correct answer is: 1:12

The correct ratio for a handicap ramp from the top to the bottom is 1:12. This means that for every inch of vertical rise, there should be at least 12 inches of ramp run. This standard is established to ensure that ramps are accessible for individuals with disabilities, particularly those using wheelchairs or mobility devices. A 1:12 ratio is considered ideal because it strikes a balance between usability and safety, allowing for a gentle slope that reduces the risk of slipping and makes it easier for users to navigate the ramp independently or with assistance. Ramps with slopes steeper than this ratio may pose difficulties and could potentially violate accessibility standards such as those outlined in the Americans with Disabilities Act (ADA). While a 1:8 or even a 1:10 slope may seem manageable for some, they are steeper than what is generally recommended for most situations, making it increasingly challenging for users who may not have the strength or stability to navigate a steeper incline. Similarly, a 1:14 slope would not provide sufficient support for safety and accessibility requirements. Using the 1:12 ratio ensures compliance with legal standards while providing safety and comfort for users.