Figure 35(a) Shower Size and Clearances 36-in by 36-in (915-mm by 915-mm) Stall
The clear floor space shall be a minimum of 48 inches (1220 mm) in length by a minimum of 36 inches (915 mm) in width and allow for a parallel
approach. The clear floor space shall extend 1 foot beyond the shower wall on which the seat is mounted.