36 CFR Part 1191 ABA Accessibility Guidelines, Outdoor Developed Areas - Preamble

1018.10 Dune Crossings

This section requires handrails complying with 505 of the Architectural Barriers Act Accessibility Guidelines and curbs or barriers to be provided where the slope of a beach access route at a dune crossing is steeper than 1:20 (5%). The curbs or barriers are required to prevent the passage of a 2 inch diameter sphere, where any portion of the sphere is within 2 inches of the crossing surface.