A detectable warning surface features a grid of truncated domes with a base diameter of zero point nine inches and a top diameter of zero point four five inches, standing zero point two inches high. The domes are spaced at two point three five inches center-to-center in a square grid pattern. Edges are tapered where exposed. The installation complies with Section 11B-247.1 of the 2019 California Building Code and uses Federal Yellow truncated domes.
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