ABA Accessibility Standard for GSA Facilities Pocket Guide

1018.10 Dune Crossings.

Where the slope of a beach access route at a dune crossing is steeper than 1:20 (5%), handrails complying with 505 and curbs or barriers shall be provided. The curbs or barriers shall prevent the passage of a 2 inch (50 mm) diameter sphere, where any portion of the sphere is within 2 inches (50 mm) of the crossing surface.