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  2. Stair tread - Wikipedia

    en.wikipedia.org/wiki/Stair_tread

    According to the United States Access Board, stair treads in buildings shall have uniform tread depths that are 11 inches, or 280 mm, at minimum. Treads are not permitted to have a slope steeper than 1:48. [4] All stair tread installations must comply with Regulation 302 of the ADA Standards for Accessible Design. The regulation states that the ...

  3. Americans with Disabilities Act of 1990 - Wikipedia

    en.wikipedia.org/wiki/Americans_with...

    Under Title III of the ADA, all new construction (construction, modification or alterations) after the effective date of the ADA (approximately July 1992) must be fully compliant with the Americans With Disabilities Act Accessibility Guidelines (ADAAG) [13] found in the Code of Federal Regulations at 28 C.F.R., Part 36, Appendix A.

  4. Wheelchair ramp - Wikipedia

    en.wikipedia.org/wiki/Wheelchair_ramp

    A concrete wheelchair ramp A portable wheelchair ramp. A wheelchair ramp is an inclined plane installed in addition to or instead of stairs. Ramps permit wheelchair users, as well as people pushing strollers, carts, or other wheeled objects, to more easily access a building, or navigate between areas of different height. Ramps for accessibility ...

  5. Stairs - Wikipedia

    en.wikipedia.org/wiki/Stairs

    The dimensions of a stair, in particular the rise height and going of the steps, should remain the same along the stairs. [14] The following stair dimensions are important: The rise height or rise of each step is measured from the top of one tread to the next. It is not the physical height of the riser; the latter excludes the thickness of the ...

  6. Wheelchair accessible van - Wikipedia

    en.wikipedia.org/wiki/Wheelchair_accessible_van

    An ADA compliant accessible van must meet certain requirements such as; a door height opening of 56" or greater, a ramp width of at least 30" in width, with ramp edges 2" high, and finally a ramp angle of a 6:1 ratio or rise

  7. Accessibility of the Metropolitan Transportation Authority

    en.wikipedia.org/wiki/Accessibility_of_the...

    In 1991, ninety percent of buses were equipped with wheelchair lifts and ten of the 54 key stations were made wheelchair-accessible; at the time, 20 of 469 subway stations had ramps or elevators. [9] The New York City Transit Authority had also made efforts to improve training for its employees and bus operators to on how to assist people with ...