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Pages 3-5

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From page 3...
... 3Detectable warning systems are installed at curbs throughout the United States in response to requirements of the Americans with Disabilities Act (ADA)
From page 4...
... • Mechanical integrity – Adhesion/attachment to substrate – Material strength • Dimensional stability of truncated domes These properties have a direct impact on the performance of a detectable warning system on a sidewalk. A contrasting color guideline is included in the ADAAG, and any fading or other changes in color as a result of exposure can affect functionality.
From page 5...
... The following deterioration mechanisms have been identified as significant: • Freezing and thawing • Exposure to ultraviolet radiation • Snow removal • Abrasion • Exposure to moisture • Thermal cycling and exposure to high temperatures • Impact • Vehicle traffic • Corrosion • Exposure to moisture and alkalinity • Salt scaling and corrosion of metallic systems • Settling of pavers Each of these deterioration mechanisms is caused by natural or man-made environmental exposure. In some geographic areas, detectable warning systems may be vulnerable to all of the listed deterioration mechanisms, while in other areas, some mechanisms may be negligible.

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