Alterations to an existing building must be provided with an accessible path of travel to the specific area of alteration. This includes the primary entrance to the building or facility, toilet or bathing facilities serving the area, drinking fountains, public telephones, and signs.

Turning space shall be a circular space of 60” diameter, or a T-shaped space with a 60” length for arms width, and a base that is 36” wide. See 11B-304.3.2.

Door maneuvering clearances are determined based on Approach Direction -- from the front, hinge side, latch side, approach side, pull or push side -- whether the path is perpendicular or parallel to a doorway.

See Table 11B-404.2.4.1 for each case scenario.

¼ inch is the maximum. 

34 inches is the maximum height.

36 inches is the maximum height.

8.33% is the maximum for a ramp slope. 

The slope requirements for different parts of an accessible route vary.

Walkways 5%
Ramps 8.33%
Landings 2%
Elevator car 2%
Accessible parking 2%

30” x 48” is the minimum width.