The ADA ramp landing code was created to make it easier for the elderly and handicapped to access public building. If you’re building is classified as a “public accommodation”, then the American Disabilities Act requires a level landing for your primary access door if the door threshold is a 1/2 inch vertical rise or greater.
This landing provides a “maneuverable clearance area” that allows a wheelchair-bound person to access the door hardware without losing position.
ADA Ramp Landing Code Definitions
Any part of an accessible route with a slope greater than 1:20 shall be considered a ramp and shall comply with 4.8.
4.8.2* Slope and Rise
The least possible slope shall be used for any ramp. The maximum slope of a ramp in new construction shall be 1:12. The maximum rise for any run shall be 30 in (760 mm). Curb ramps and ramps to be constructed on existing sites or in existing buildings or facilities may have slopes and rises as allowed in 4.1.6(3)(a) if space limitations prohibit the use of a 1:12 slope or less.
Source: Thanks to ADA Compliance for sharing these important rules.
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