ABA Accessibility Standard for GSA Facilities Pocket Guide
304 Turning Space
EXCEPTION: Slopes not steeper than 1:48 shall be permitted.
The turning space shall be a space of 60 inches (1525 mm) diameter minimum. The space shall be permitted to include knee and toe clearance complying with 306.
The turning space shall be a T-shaped space within a 60 inch (1525 mm) square minimum with arms and base 36 inches (915 mm) wide minimum. Each arm of the T shall be clear of obstructions 12 inches (305 mm) minimum in each direction and the base shall be clear of obstructions 24 inches (610 mm) minimum. The space shall be permitted to include knee and toe clearance complying with 306 only at the end of either the base or one arm.
Figure 304.3.2 T-Shaped Turning Space
Doors shall be permitted to swing into turning spaces.