This detectable warning surface features a grid of truncated domes with a 36-inch width and specified spacing. Individual domes measure .9 inches at the base, .45 inches at the top, and 2 inches in height with tapered edges where exposed. Dome centers are spaced 2.35 inches apart horizontally and vertically. The installation requires yellow color conforming to Federal Color Number 33538 of Standard Number 595B. A continuous 36-inch wide detectable warning defines the boundary where walks cross or adjoin vehicular ways without intervening curbs or railings.
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