PROWAG (36 CFR 1190)
R305 — Detectable Warning Surfaces
PROWAG · Chapter 3: Technical Requirements. Full current text with cross-references on BuildSpec.
R305 Detectable Warning Surfaces R305.1 General. Detectable warning surfaces shall consist of truncated domes in a square or radial grid pattern and shall comply with R305. R305.1.1 Dome Size. The truncated domes shall have a base diameter of 0.9 inches (23 mm) minimum and 1.4 inches (36 mm) maximum, a top diameter of 50 percent of the base diameter minimum and 65 percent of the base diameter maximum, and a height of 0.2 inches (5.1 mm). When detectable warning surface tiles are cut to fit, partial domes are permitted along the cut edges. R305.1.2 Dome Spacing. The truncated domes shall have…
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