2010 ADA Standards for Accessible Design

TECHNICAL CHAPTER 4: ACCESSIBLE ROUTES Table 405.2 Maximum Ramp Slope and Rise for Existing Sites, Buildings, and Facilities Slope 1 Maximum Rise Steeper than 1:10 but not steeper than 1:8 3 inches (75 mm) Steeper than 1:12 but not steeper than 1:10 6 inches (150 mm) 1. A slope steeper than 1:8 is prohibited. Advisory 405.2 Slope. To accommodate the widest range of users, provide ramps with the least possible running slope and, wherever possible, accompany ramps with stairs for use by those individuals for whom distance presents a greater barrier than steps, e.g., people with heart disease or limited stamina. 405.3 Cross Slope. Cross slope of ramp runs shall not be steeper than 1:48. Advisory 405.3 Cross Slope. Cross slope is the slope of the surface perpendicular to the direction of travel. Cross slope is measured the same way as slope is measured (i.e., the rise over the run). 405.4 Floor or Ground Surfaces. Floor or ground surfaces of ramp runs shall comply with 302. Changes in level other than the running slope and cross slope are not permitted on ramp runs. 405.5 Clear Width. The clear width of a ramp run and, where handrails are provided, the clear width between handrails shall be 36 inches (915 mm) minimum. EXCEPTION: Within employee work areas, the required clear width of ramps that are a part of common use circulation paths shall be permitted to be decreased by work area equipment provided that the decrease is essential to the function of the work being performed. 405.6 Rise. The rise for any ramp run shall be 30 inches (760 mm) maximum. 405.7 Landings. Ramps shall have landings at the top and the bottom of each ramp run. Landings shall comply with 405.7. Advisory 405.7 Landings. Ramps that do not have level landings at changes in direction can create a compound slope that will not meet the requirements of this document. Circular or curved ramps continually change direction. Curvilinear ramps with small radii also can create compound cross slopes and cannot, by their nature, meet the requirements for accessible routes. A level landing is needed at the accessible door to permit maneuvering and simultaneously door operation. 128 - 2010 Standards: Titles II and III Department of Jus1ti6c5e Titles II and III - 2010 Standards - 99