Accessible Parking Space Geometry (2010 ADA Standards 502)
Count is one question and geometry is another, and the van case goes wrong twice.
Example
You enter
- Space type van
- Space width (in) 96
- Access aisle width (in) 60
- Space length (in) 216
- Access aisle length (in) 216
- Angled space? no
- Aisle side passenger
- Vertical clearance at the space, aisle, and route (in) 98
- Surface slope, run per unit rise (48 = 1:48 maximum) 48
You get
- Required space width (in) 132
- Required aisle width (in) 96
- Space deficit (in) 36
- Aisle deficit (in) 36
- Pair width (in) 156
- Min pair width (in) 192
Details, formula, and sources
A van space is 132 in -- eleven feet -- UNLESS the aisle is widened to 96 in, in which case the space may drop to 96 in. So there are two legal van layouts, 132+60 and 96+96, and both total 192 in of pavement: which to stripe is a layout decision, not a compliance one, and that usually unsticks a tight lot. The aisle must run the FULL LENGTH of the space, and on ANGLED van spaces must sit on the PASSENGER side -- the one rule flipping the stripes cannot fix. Van spaces, aisles, AND the route serving them need 98 in of clearance.
car space 96 in wide with a 60 in aisle. Van space 132 in wide with a 60 in aisle, OR 96 in wide where the access aisle is 96 in wide - both layouts total 192 in of pavement. The aisle must extend the full length of the space it serves, may not overlap the vehicular way, and on angled van spaces must sit on the passenger side. Van spaces, their aisles, and the vehicular routes serving them require 98 in of vertical clearance. Slopes no steeper than 1:48 in all directions.
2010 ADA Standards for Accessible Design, 502.2 with its exception, 502.3.1 through 502.3.4, 502.4 with its exception, and 502.5. A US federal standard in the public domain, quoted directly.
The 2010 ADA Standards are published in full at no cost at ada.gov and by the US Access Board.
Estimate. AHJ and licensed professional govern.
Field names used by the API: space_type, space_width_in, aisle_width_in, space_length_in, aisle_length_in, angled, aisle_side, vertical_clearance_in, surface_slope_ratio, required_space_width_in, required_aisle_width_in, space_deficit_in, aisle_deficit_in, pair_width_in, min_pair_width_in
- Car space 96 in wide minimum with a 60 in aisle2010 ADA Standards 502.2 and 502.3.1
- Van space 132 in wide minimum, or 96 in where the access aisle is 96 in2010 ADA Standards 502.2 and Exception
- Aisle length the full length of the parking spaces it serves2010 ADA Standards 502.3.2
- Angled van spaces access aisle on the passenger side2010 ADA Standards 502.3.4
- Vertical clearance 98 in at van spaces, their aisles, and the vehicular routes serving them2010 ADA Standards 502.5
- Slope no steeper than 1:48 in all directions, aisle level with the space2010 ADA Standards 502.4 and Exception