For ramps extended for use other than specifically for means of egress, what is the maximum allowable slope?

The standard for ramps that are not used primarily for egress typically follows guidelines set forth in the Americans with Disabilities Act (ADA) and similar codes that ensure accessibility. The maximum allowable slope for such ramps is generally 1:8, which translates to a slope of 12.5%. This means that for every inch of vertical rise, there should be at least 8 inches of horizontal run, resulting in a gentle enough slope that allows for ease of use by individuals with mobility challenges.

In contrast, steeper slopes, such as those represented by other options, could create difficulty for individuals using the ramp, particularly those relying on wheelchairs or other mobility devices. While some building codes may allow for slightly steeper slopes in specific designs or conditions, the maximum recommended and widely accepted slope here is indeed 12.5%. This ensures compliance with safety and accessibility standards in building design.