Where is it?
I would think the 20% rule would apply to an existing building
Characters. Letters, numbers, punctuation marks and typographic symbols.
Children's Use. Describes spaces and elements specifically designed for use primarily by people 12 years old and younger.
Circulation Path. An exterior or interior way of passage provided for pedestrian travel, including but not limited to, walks, hallways, courtyards, elevators, platform lifts, ramps, stairways, and landings.
Closed-Circuit Telephone. A telephone with a dedicated line such as a house phone, courtesy phone or phone that must be used to gain entry to a facility.
Common Use. Interior or exterior circulation paths, rooms, spaces, or elements that are not for public use and are made available for the shared use of two or more people.
Cross Slope. The slope that is perpendicular to the direction of travel (see running slope).
Curb Ramp. A short ramp cutting through a curb or built up to it.
Detectable Warning. A standardized surface feature built in or applied to walking surfaces or other elements to warn of hazards on a circulation path.
