2022 California Standards for Accessible Design Guide (effective January 1, 2023)
11B-1008.2.5.3.1 Handrail gripping surfaces.
Handrail gripping surfaces with a circular cross section shall have an outside diameter of 0.95 inch (24 mm) minimum and 1.55 inches (39 mm) maximum. Where the shape of the gripping surface is non-circular, the handrail shall provide an equivalent gripping surface.
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