The ADA standards sets guidelines for accessibility to places of public accommodation and commercial facilities by individuals with disabilities. These guidelines are to be applied during the design, construction, and alteration of such buildings and facilities to the extent required by regulations issued by Federal agencies, including the Department of Justice, under the Americans with Disabilities Act of 1990.

A parking lot has 120 parking spaces. The minimum number of accessible parking spaces are:

The minimum clear width for wheelchair in a spot path such as a doorway is:

The minimum clear width of a ramp (figure 12) is:

If a ramp run has a rise greater than 6 in (150 mm) or a horizontal projection greater than 72 in (1830 mm), then it shall have handrails on both sides.

If handrails are not continuous, they shall extend at least 12 in (305 mm) beyond the top and bottom of the ramp segment and shall be parallel with the floor or ground surface (fig. 17).

On any given flight of stairs, all steps shall have uniform riser heights and uniform tread widths. Stair treads shall be no less than 11 in (280 mm) wide, measured from riser to riser.

In restaurants and cafeterias where food and drinks are served at counters, the height of the counter should not exceed 34 inches and the length of the counter should be at least 60 inches long.

The maximum height of the drinking fountain should not exceed:

In fig. 24 (a, b, c, d) door should have a minimum clearing distance of: