http://www.access-board.gov/adaag/html/adaag.htm#4.17
4.17.3* Size and Arrangement. The size and arrangement
of the standard toilet stall shall comply with
Fig. 30(a),
Standard Stall. Standard toilet stalls with a minimum depth of
56 in (1420 mm) (see
Fig. 30(a)) shall
have wall-mounted water closets. If the depth of a standard
toilet stall is increased at least 3 in (75 mm), then a
floor-mounted water closet may be used. Arrangements shown for
standard toilet stalls may be reversed to allow either a left-
or right-hand approach. Additional stalls shall be provided in
conformance with
4.22.4.
Appendix Note
EXCEPTION: In instances of alteration work
where provision of a standard stall (Fig.
30(a)) is technically infeasible or where
plumbing code requirements prevent combining existing stalls to
provide space, either alternate stall (Fig.
30(b)) may be provided in lieu of the
standard stall.
4.17.4 Toe Clearances. In standard
stalls, the front partition and at least one side partition
shall provide a toe clearance of at least 9 in (230 mm) above
the floor. If the depth of the stall is greater than 60 in (1525
mm), then the toe clearance is not required.
4.17.5* Doors. Toilet stall doors,
including door hardware, shall comply with
4.13. If toilet
stall approach is from the latch side of the stall door,
clearance between the door side of the stall and any obstruction
may be reduced to a minimum of 42 in (1065 mm)
(Fig. 30).
Appendix Note
4.17.6 Grab Bars. Grab bars
complying with the length and positioning shown in
Fig. 30(a),
(b),
(c), and
(d) shall be
provided. Grab bars may be mounted with any desired method as
long as they have a gripping surface at the locations shown and
do not obstruct the required clear floor area. Grab bars shall
comply with
4.26.
The location of the door is to be in front of the clear
space (next to the water closet), with a maximum stile width of
4 inches (100 mm). An alternate door location is illustrated to
be on the side of the toilet stall with a maximum stile width of
4 inches (100 mm). The minimum width of the standard stall shall
be 60 inches (1525 mm). The centerline of the water closet shall
be 18 inches (455 mm) from the side wall.
The
Handicap sign is used to indicate that handicap facilities are
available. Handicap bathrooms generally include a bathroom door
wide enough to fit a wheeled chair into the stall along with grab bars
that allow for easier mobility while in the bathroom stall. There are a variety of restroom signs for handicap
equipped bathrooms. The Handicap Bathroom sign
is 6" wide and 9" tall and can be mounted next to or on the bathroom
door. These bathroom signs are ADA compliant and feature raised
lettering and Braille. Please see 
Figure A