The cross slope of walking surfaces shall not be steeper than 1 48.
Ada ground and floor surfaces.
Changes in level up to 1 4 in 6 mm may be vertical and without edge treatment.
The ada discusses ground and floor surfaces in section 4 5 where they say in general that.
Accessible surfaces remain unchanged by external forces objects or materials.
403 2 floor or ground surface.
Walking surfaces shall provide clearances complying with 403 5.
Floor or ground surfaces shall comply with 302.
502 4 floor or ground surfaces.
302 floor ground surfaces.
404 doors doorways gates.
303 change in level.
Stairways that are part of a means of egress.
Parts creating horizontal or vertical joints in these surfaces shall be within 1 16 inch 1 6 mm of the same plane as the other.
Ground and floor surfaces along accessible routes and in accessible rooms and spaces including floors walks ramps stairs and curb ramps shall be stable firm slip resistant and shall comply with 4 5.
403 4 changes in level.
Changes in level are not permitted.
Access aisles shall be at the same level as the parking spaces they serve.
Swinging door and gate surfaces within 10 inches 255 mm of the finish floor or ground measured vertically shall have a smooth surface on the push side extending the full width of the door or gate.
The running slope of walking surfaces shall not be steeper than 1 20.
Ada ground and floor surfacesalong accessible routes must be stable firm and slip resistant.
Interior and exterior accessible routes including walking surfaces ramps elevators and lifts.
Elongated openings shall be placed so that the long dimension is perpendicular to the dominant direction of travel.
305 clear floor ground spaces.
Soft loose surfaces such as sand or gravel wet clay or cobblestones can make it difficult for wheelchairs to move in ease.
Hardened materials such as concrete asphalt tile and wood are sufficiently firm and stable for accessibility.
Parking spaces and access aisles serving them shall comply with 302.
Wheelchairs move most easily on hard stable and regular surfaces.
Changes in level shall comply with 303.
Accessible floor and ground surfaces must be stable firm and slip resistant.
Ground and floor surfaces along accessible routes and in accessible rooms and spaces including floors walks ramps stairs and curb ramps shall be stable firm slip resistant and shall comply with 4 5.
Specifications for floor and ground surfaces address surface characteristics carpeting openings and changes in level.
Required clearances including clear floor space wheelchair seating spaces turning space and door maneuvering clearances.