North Carolina Building Contractor License Practice Exam

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What is the maximum slope allowed for ramps used as part of a means of egress?

1 vertical in 4 horizontal
1 vertical in 12 horizontal
1 vertical in 6 horizontal
1 vertical in 8 horizontal

The correct answer is: 1 vertical in 12 horizontal

The maximum slope allowed for ramps used as part of a means of egress is determined by accessibility standards, specifically the Americans with Disabilities Act (ADA) guidelines. The correct slope for ramps in this context is 1 vertical in 12 horizontal, which means that for every inch of vertical rise, there must be at least 12 inches of horizontal run. This ratio makes the ramp easier to navigate for individuals using wheelchairs or those with mobility impairments. This slope promotes safety and accessibility, as steeper ramps can pose challenges, making them difficult or dangerous for individuals with disabilities to use effectively. The design is intended to minimize the risk of falls and ensure that ramps are usable in various conditions. While other slope ratios, such as 1 vertical in 4, 1 vertical in 6, and 1 vertical in 8, may be permissible in other contexts (like certain construction applications), they exceed the recommended steepness for ramps intended for accessible means of egress under the prevailing guidelines. Thus, the 1 in 12 ratio is crucial for compliance with safety regulations and for providing equitable access for all individuals.