Building Code Administrators and Inspectors Florida Principle and Practice Licensure Practice Exam

What must a ramp be designed to ensure it does not exceed in steepness?

1. 1:2

2. 1:4

3. 1:6

4. 1:8

The correct answer is: 1:4

A ramp's design steepness requirement is crucial for accessibility and usability. The correct design steepness is 1:4, meaning for every 1 unit of vertical rise, there should be at least 4 units of horizontal run. This specification helps to ensure that ramps are navigable by individuals using wheelchairs or other mobility devices, making it compliant with regulations such as the Americans with Disabilities Act (ADA). Designing a ramp at this ratio prevents excessive incline, which can lead to challenges in maneuverability and safety. A steeper ramp, often beyond a 1:4 ratio, increases the risk of slipping or losing control, particularly for individuals who may not have the strength or balance to navigate a steep slope. Additionally, a more gradual slope allows for easier access for other users, maintaining a standard of universal design. Options indicating a steeper incline, such as 1:2, would be too steep for safe use, while ratios that are flatter, like 1:6 and 1:8, are generally reserved for situations where space permits and are not standard ramp designs typically used for public accessibility. Therefore, a 1:4 slope strikes a balance between feasibility and safety, adhering to necessary building codes.