1110-3-106
hung water closets are generally recommended for
(2) Fixture Arrangement.
Fixtures' arrangement should minimize traffic
normal-use restrooms. Water closet seats should be
congestion. The usual arrangement of restroom fixtures
unbreakable and have open fronts and an impervious
is lavatories nearest the door, followed by urinals,
surface. Color recommendations are the same as for
water closets, and dressing rooms. Where space is
lavatories. Self-metering flush valves are recommended
lacking, these fixtures are typically placed along a
for all types.
narrow corridor; urinals are nearest the door to allow
a wider aisle.
c. Urinals should be chosen for appearance, durability,
and ease of cleaning. Three kinds of urinals can be
used: stall, wall-hung, or pedestal types. The wall-hung
(3) Fixture Layout.
Fixture layout should be accessible to the handicapped.
type is recommended. Partitions or fins are usually
placed between pedestal or wall-hung urinals, but
Refer to AEI - Design Criteria, Chapter 7.
rarely between stall urinals. Many wall-hung urinals
have integral shields which serve as partitions. If the
F. Utilities and Wastes.
space between stall urinals is too small for easy
Restrooms must have enough sewer capacity to
cleaning, pockets should be filled flush with impervious
support increased use during hourly breaks. Careful
surface materials. Urinals are usually white or light-
consideration should be given to restroom fixture
colored.
arrangement and its effect on the plumbing and pipe
runs. Fixtures should be arranged in batteries. Stall
urinals need a trap beneath the floor level. If the
(2) Partitions.
floor-slab thickness will not accommodate the trap's
indicated average dimension, urinals may be placed on
a. Partition systems should be chosen for appearance,
a platform 4 inches high by about 2 feet wide and
durability, and ease of cleaning. Partitions should stop
their surface pitched to the fixtures.
about 1 foot above the floor for air circulation.
Various kinds of metal partitions are available; these
include post-and-panel assemblies (with or without
G. Environmental Conditions.
overhead bracing) and flush panels with integral posts
(floor-supported or ceiling-hung). (Figure 4-70). Floor-
(1) Lighting.
mounted partition systems are usually more durable
Lighting should be appropriate for washrooms. In
general, 20 to 30 foot-candles will adequately light a
than other types; ceiling-hung types make floor
restroom. Lights should directly illuminate lockers,
cleaning easy. Partition colors should fit with overall
lavatories, and showers.
room decor. Subdued and neutral colors are
recommended. Partitions should resist corrosion.
(2) Ventilation.
Compartment dimensions depend on whether doors
Restrooms must be well ventilated to control odor;
swing inward or outward.
2.0 to 2.5 cubic feet per minute of exhaust ventilation
without recirculation is recommended per square foot
b. Accessories for restrooms should be easy to use,
of floor area. A minimum of 1.5 cubic feet per
durable, attractive, and easy to clean and service.
minute per square foot should be provided.
Finishes on accessories should be noncorrosive.
Double-roll, 15,000-sheet toilet tissue dispensers are
H. Furniture.
recommended. One towel dispenser should serve no
more than three lavatories. Automatic hand driers
(1) Fixtures.
should serve no more than two lavatories. One soap
dispenser should be provided for every two lavatories.
a. Lavatory fixtures should be chosen for appearance,
Dispensers for waterless or other special hand cleaners
durability, and ease of cleaning. Lavatories may be
should be provided in restrooms near laboratories and
leg, counterset, or wall-hung. Wall-hung types are
shops. Each lavatory should have a shelf. Waste
easiest to clean; however, they must be supported on
containers for paper towels should have an 8- to
suitable chair carriers to avoid unsightly cracks
10-gallon capacity per towel dispenser. Waste
between wall and fixtures. Lavatories should be white
containers should meet Occupational Safety and Health
or a light color.
Administration (OSHA) regulations and be easy to
remove and empty. Each women's water closet should
b. Water closets should be selected for appearance,
have a feminine napkin dispenser; these dispensers
durability, and ease of cleaning. Water closets are
should include disposal bags. When a women's
either wall-hung or floor (pedestal) types. Floor-type
restroom includes a lounge, there should be an ashtray
water closets are hard to clean and are recommended
with each couch.
only for restrooms whose use will be restricted. Wall-
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