Is your Asphalt Improvement Up to ADA Code Requirements?



Are you planning on doing a major parking lot improvement this year. If so you should be aware that ADA code requirements should be part of your upcoming project. The ADA code has many rules, provisions, and guidelines that all building owners, managers, and facility engineers should be aware of. Here is some brief information on detectable warning or also known as truncated domes.

In the U.S. tactile warnings systems are required by the ADA. The federal government now mandates detectable warnings in prescribed locations, such as on the surface of pedestrian curb cuts and at the edge of rail platforms.

The ADA Accessibility Guidelines (ADAAG) require these warnings on the surface of curb ramps, which remove a tactile cue otherwise provided by curb faces, and at other areas where pedestrian ways blend with vehicular ways. The raised pattern of domes also known as truncated domes are the preferred design for detectable warning tiles and pavers.

Specifications for ADA Detectable Warning Truncated Domes United States Access Board – ADAAG Specifies:

Detectable Warnings on Walking Surfaces. Detectable warnings shall consist of raised truncated domes with a diameter of nominal 0.9 in (23 mm), a height of nominal 0.2 in (5 mm) and a center-to-center spacing of nominal 2.35 in (60 mm) and shall contrast visually with adjoining 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.

So if you are planning an upcoming project or planning for a future budget. Keep in mind that the ADA code requires full compliance, there is no grandfathering with respect to compliance.