Tekway Dome Tiles

Accessible Design for the Blind
www.accessforblind.org

  • Accessible Design for the Blind:
      • About Detectable Warning Surfaces

United States Access Board
www.access-board.gov

  • Publications-Facilities, Guidelines and Standards
      • Requirements of a Detectable Warning Surface
      • Where are Detectable Surfaces Required?
  • Revised Guidelines for Accessible Public Rights-of-Way (Nov. 2005)
  • Public Rights of Way Final Report: Building a True Community
      • Publications Public Rights-of-Way
  • US DOT Memorandum
      • Re: ADAAG & Detectable Warnings

United States Access Board
www.access-board.gov

• Detectable Warnings: Synthesis of U. S. and International Practice.
ADAAG Specifies:

705 Detectable Warnings

705.1 General. Detectable Warnings shall consist of a surface of truncated domes and shall comply with 705.

705.1.1 Dome Size. Truncated domes in a detectable warning surface shall have a base diameter of 0.9 inch (23 mm) minimum and 1.4 inch (36 mm) maximum, a top diameter of 50 percent of the base diameter minimum to 65 percent of the base diameter maximum, and a height of 0.2 inch (5.1 mm).

705.1.2 Dome Spacing. Truncated domes in a detectable warning surface shall have a center-to-center spacing of 1.6 inches (41 mm) minimum and 2.4 inches (61 mm) maximum, and a base-to-base spacing of 0.65 inch (17mm) minimum, measured between the most adjacent domes on a square grid.

705.1.3 Contrast. Detectable Warning Surfaces shall contrast visually with adjacent walking surfaces either light-on-dark, or dark-on-light.

The material used to provide contrast shall be an integral part of the walking surface. Detectable warnings used on interior surfaces shall differ from adjoining walking surfaces in resiliency or sound-on-cane contact. ADAAG 4.29.2

ADA
www.ada.gov/reg3a.html

  • Title III Section 36.211 Maintenance of accessible feature:
     a. A public accommodation shall maintain in operable working condition those
         features of facilities and equipment that are required to be readily accessible
         to and usable by persons with disabilities by the Act or this part.

     b. This section does not prohibit isolated or temporary interruptions in access
         due to maintenance or repairs.