Figure 35(b) 30 in by 60 inches (760 mm by 1525 mm) Stall (Roll-in Shower). The clear floor space alongside the opening to the shower shall be a minimum of 60 inches (1220 mm) in length by a minimum of 36 inches (915 mm) in width. If the controls are located on the back (long) wall, they must be a maximum of 27 inches (685 mm) from a side wall. An accessible lavatory may be located in the clear floor space at the end of the shower. Grab bars are shown on all three walls of the shower.