ABA Accessibility Standard for GSA Facilities Pocket Guide

1011.4.2 Wheelchair Space.

Picnic tables shall provide at least one wheelchair space for each 24 linear feet (7320 mm) of usable table surface perimeter.  Wheelchair spaces shall be 30 inches (760 mm) minimum by 48 inches (1220 mm) minimum.  Wheelchair spaces shall be positioned for a forward approach to the table and provide knee and toe clearance complying with 306 under the table.