Raised thresholds and floor level changes greater than what height must be beveled with a maximum slope of 1:2?

The requirement for beveled thresholds and floor level changes greater than a specific height is grounded in accessibility standards. A change in height can create an obstacle for individuals with mobility challenges. To ensure that transitions between different floor levels are navigable, especially for those using wheelchairs or other mobility aids, the standard establishes the maximum slope ratio.

The specified measurement of 1/4 inch indicates that any raised threshold or floor level change exceeding this height needs to be beveled to a slope of 1:2. This means for every 2 inches of horizontal distance, the height change must not exceed 1 inch. By following this guideline, the transition becomes smoother, thus promoting accessibility and safety.

The other suggested heights such as 1/2, 3/4, and 1 inch represent increases that are not in alignment with the established standards specifically aimed at preventing potential trip hazards while also facilitating better accessibility for individuals with disabilities. The correct standard aligns with a commitment to inclusivity and safety in building design.