36 CFR Part 1191 ABA Accessibility Guidelines, Outdoor Developed Areas - Preamble

1015.3 Viewing Space

This section requires each distinct viewing location to provide a viewing space adjacent to the clear ground space required by 1015.2 through which the point of interest is viewable. The viewing space is required to be 32 inches maximum and 51 inches minimum high above the ground and extend the full width of the clear ground space. Guards or similar safety barriers are permitted to obstruct the viewing space to the extent the obstruction is necessary for the guard or safety barrier to serve its intended purpose.