When working on projects involving site pedestrian and vehicular circulation, pay close attention to the CBC requirements for detectable warnings at hazardous vehicular areas outlined in CBC Section 1133B.8.5. Where a curb, railing or other element does not separate a walk from a vehicular way, a continuous 36” wide detectable warning is required. There are a variety of products available ranging from mortar bed set concrete tiles from HANOVER and WASSAU to cast-in-place, replaceable and surface mount composite products. The CBC requires that the detectable warning contrast visually with adjoining surfaces, either light on dark or dark on light. Designers should contact the appropriate agency’s Building Official, or Building Inspector to confirm that the color selected contrasts visually with the adjoining surfaces. This is especially critical when the adjoining surface is integral colored concrete. Unfortunately, some jurisdictions interpret California Title 24 to require safety yellow (Federal Color 3538).
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