accessibility standards for Federal outdoor developed areas 51 A SUMMARY OFACCESSIBILITY STANDARDS FOR OUTDOOR DEVELOPEDAREAS Technical Requirements Applicable to Specific Features Picnic Tables [1011.2 and 1011.4] The number of wheelchair spaces that must be provided at each table is based on the usable table surface perimeter. At least one wheelchair seating space a minimum of 30 by 48 inches must be provided for each 24 linear feet of usable space around the perimeter of a tabletop. Practically speak- ing, this means that one space is usually required for tables up to 9 feet long. Tables between 10 and 20 feet long usually require two wheelchair spaces (figure 17). More spaces are required for longer tables. Figure 17—At least two spaces must be accessible at a 10- to 18-foot long picnic table.