SURVEY FORM 21: DETECTABLE WARNINGS

Use with the Minimum Requirements Summary Sheets and ADAAG.

Facility Name:

See Minimum Requirements Summary Sheets I and J for special requirements and exceptions which may be allowed in alterations and historic preservation. See also ADAAG 4.1.6 and 4.1.7.

Location of Detectable Warning:

Section Item Technical Requirements Comments Yes No
4.7.7 Curb Ramps: Do curb ramps on a site have a detectable warning complying with 4.29.2 (see below) extending the full width and depth of the curb ramp? (Detectable warnings are not required on the flared sides.)      
4.29.5 Hazardous Vehicular Way: If a walk crosses or adjoins a vehicular way and the walking surfaces are not separated by curbs, railings, or other elements between the pedestrian areas and vehicular areas, is the boundary between the areas defined by a continuous detectable warning complying with 4.29.2 which is 36 inches wide on the edge of the pedestrian area?      
4.29.6 Reflecting Pools: Are the edges of reflecting pools protected by railings, walls, curbs, or detectable warnings complying with 4.29.2?      
4.29.2 Detectable Warnings - Pattern: Do detectable warnings consist of raised truncated domes with a nominal diameter of 0.9 inches, a nominal height of 0.2 inches, and a nominal center-to-center spacing of 2.35 inches? (See Figure below)      
  Contrast: Do detectable warnings contrast visually with adjoining surfaces (light-on-dark or dark-on-light)?      
    Is the material used to provide contrast an integral part of the walking surface?      
  Interior Resilience and Sound: Do the detectable warnings used on interior surfaces differ from adjoining walking surfaces in resiliency or sound-on-cane contact?      

Pattern and cross section views of detectable warning

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