In addition to clearances discussed in the text, the following knee clearance is required underneath the lavatory: 27 inches (685 mm) minimum from the floor to the underside of the lavatory which extends 8 inches (205 mm) minimum measured from the front edge underneath the lavatory back towards the wall; if a minimum 9 inches (230 mm) of toe clearance is provided, a maximum of 6 inches (150 mm) of the 48 inches (1220 mm) of clear floor space required at the fixture may extend into the toe space.