What is the minimum height above which a ramp must be added?

In interior design and accessibility guidelines, a change in level of a certain height necessitates the inclusion of a ramp to ensure safe and accessible passage for individuals with mobility impairments. The correct answer implies that when the height difference reaches 1 1/2 inches, a ramp is required to create a smooth transition between different floor levels.

When the height is less than 1 1/2 inches, it is generally acceptable to use a bevel or slope instead of a full ramp, as these minor changes can often be navigated safely without the assistance of a ramp. This understanding aligns with design standards that aim to enhance accessibility while still prioritizing safety and ease of movement.