United States · ADA · Accessibility standard
2010 ADA Standards for Accessible Design
The Department of Justice’s scoping and technical accessibility requirements for facilities covered by the ADA.
- Publisher
- U.S. Department of Justice
- Edition
- 2010 standards
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- 279 of 279 PDF pages · 2 OCR pages
AccessibilityAnthropometry & ergonomics
Open original PDF at page 84 Source wording and page order preserved. Drawings and table layouts remain available in the original PDF.
ADA CHAPTER 2: SCOPING REQUIREMENTS AMERICANS WITH DISABILITIES ACT: SCOPING
determining the total row length. If the row length in the 2nd and 3rd quartile of a row is
insufficient to accommodate the required number of companion seats and wheelchair
spaces, the additional companion seats and wheelchair spaces shall be permitted to be
located in the 1st and 4th quartile of the row.
2. In row seating, two wheelchair spaces shall be permitted to be located side-by-side.
Advisory 221.2.3.1 Horizontal Dispersion. Horizontal dispersion of wheelchair spaces is
the placement of spaces in an assembly facility seating area from side-to-side or, in the case
of an arena or stadium, around the field of play or performance area.
221.2.3.2 Vertical Dispersion. Wheelchair spaces shall be dispersed vertically at varying
distances from the screen, performance area, or playing field. In addition, wheelchair spaces
shall be located in each balcony or mezzanine that is located on an accessible route.
EXCEPTIONS: 1. Vertical dispersion shall not be required in assembly areas with 300 or
fewer seats if the wheelchair spaces provide viewing angles that are equivalent to, or better
than, the average viewing angle provided in the facility.
2. In bleachers, wheelchair spaces shall not be required to be provided in rows other than
rows at points of entry to bleacher seating.
Advisory 221.2.3.2 Vertical Dispersion. When wheelchair spaces are dispersed vertically
in an assembly facility they are placed at different locations within the seating area from
front-to-back so that the distance from the screen, stage, playing field, area of sports activity,
or other focal point is varied among wheelchair spaces.
Advisory 221.2.3.2 Vertical Dispersion Exception 2. Points of entry to bleacher seating
may include, but are not limited to, cross aisles, concourses, vomitories, and entrance
ramps and stairs. Vertical, center, or side aisles adjoining bleacher seating that are stepped
or tiered are not considered entry points.
221.3 Companion Seats. At least one companion seat complying with 802.3 shall be provided for each
wheelchair space required by 221.2.1.
221.4 Designated Aisle Seats. At least 5 percent of the total number of aisle seats provided shall
comply with 802.4 and shall be the aisle seats located closest to accessible routes.
EXCEPTION: Team or player seating areas serving areas of sport activity shall not be required to
comply with 221.4.
Advisory 221.4 Designated Aisle Seats. When selecting which aisle seats will meet the
requirements of 802.4, those aisle seats which are closest to, not necessarily on, accessible
routes must be selected first. For example, an assembly area has two aisles (A and B)
serving seating areas with an accessible route connecting to the top and bottom of Aisle A
only. The aisle seats chosen to meet 802.4 must be those at the top and bottom of Aisle A,
working toward the middle. Only when all seats on Aisle A would not meet the five percent
minimum would seats on Aisle B be designated.
8408 - 2010 Standards: Titles II and III Department of Justice
Titles II and III - 2010 Standards - 50
Edition and local adoption determine which requirements apply. Use the publisher’s document for the complete clauses, diagrams and amendments.