Where changes in level are permitted in floor or ground surfaces, they shall comply with Section 11B-303.
- Animal containment areas shall not be required to comply with Section 11B-303.
- Areas of sport activity shall not be required to comply with Section 11B-303.
Changes in level of 1/4 inch (6.4 mm) high maximum shall be permitted to be vertical and without edge treatment.
Changes in level between 1/4 inch (6.4 mm) high minimum and 1/2 inch (12.7 mm) high maximum shall be beveled with a slope not steeper than 1:2.
Abrupt changes in level exceeding 4 inches (102 mm) in a vertical dimension between walks, sidewalks or other pedestrian ways and adjacent surfaces or features shall be identified by warning curbs at least 6 inches (152 mm) in height above the walk or sidewalk surface.