Tactile warning surfaces feature truncated domes arranged in a staggered pattern with a height of zero point two inches and an integral visual contrast against the adjacent surface. The top diameter measures from zero point four five inches minimum to zero point four seven inches maximum, and the base diameter measures from zero point nine inches minimum to zero point nine two inches maximum. Center-to-center spacing ranges from two point three inches minimum to two point four inches maximum, with a base-to-base spacing of zero point six five inches minimum.
TRUNCATED DOMES – DETAILS 2.3” Min. to 2.4” Max. Center-to-Center Spacing: Height 0.2” Top Diameter 0.45” Min. to 0.47” Max. Base Diameter 0.9” Min. to 0.92” Max. Integral materials to provide contrast between domes and adjacent surface Staggered Pattern Base-to-Base spacing 0.65” Min.
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