What is the maximum slope allowed for a ramp?

The maximum slope allowed for a ramp is typically determined by accessibility guidelines to ensure that ramps are usable by individuals with disabilities. In most cases, the appropriate maximum slope ratio for accessibility is 1:12, which translates to an angle of approximately 4.76 degrees, or a slope of around 8.33%. This is significantly less than the angles represented by other options like 30, 45, 60, or 75 degrees, which would be too steep for safe use.

While option C suggests a maximum slope of 60 degrees, it is essential to understand that this degree of slope does not align with safety and accessibility standards typically adopted in construction practices. A ramp at 60 degrees would be extremely steep, posing a substantial risk for slipping and falling, particularly for individuals using wheelchairs or other mobility aids.

Understanding these standards is crucial for ensuring that structures comply with relevant building codes, and this includes making sure ramps are accessible and safe for all users. Therefore, the correct slope must be one that promotes practical usability, which is not reflected in the other options presented.