4.2 Space Allowance and Reach Ranges.
4.2.2 Width for Wheelchair Passing
The minimum width for two wheelchairs to pass is 60 in (1525 mm).
4.2.3* Wheelchair Turning Space
The space required for a wheelchair to make a 180-degree turn is a clear space of 60 in (1525 mm) diameter or a T-shaped space.
The minimum clear floor or ground space for wheelchairs may be positioned for forward or parallel approach to an object.
Clear floor or ground space for wheelchairs may be part of the knee space required under some objects.
220.127.116.11 Relationship of Maneuvering Clearance to Wheelchair Spaces
One full unobstructed side of the clear floor or ground space for a wheelchair shall adjoin or overlap an accessible route or adjoin another wheelchair clear floor space. If a clear floor space is located in an alcove or otherwise confined on all or part of three sides, additional maneuvering clearances shall be provided as shown in pictures here-under.
18.104.22.168 Surfaces for Wheelchair Spaces
Clear floor or ground spaces for wheelchairs shall comply with 4.5.
The minimum low forward reach is 15 in (380 mm). If the high forward reach is over an obstruction, reach and clearances shall be as shown in here-under.
4.2.6* Side Reach
If the clear floor space allows parallel approach by a person in a wheelchair, the maximum high side reach allowed shall be 54 in (1370 mm) and the low side reach shall be no less than 9 in (230 mm) above the floor.
If the side reach is over an obstruction, the reach and clearances shall be see here-under.