TM 5-814-9
CHAPTER 4
STANDARD WASH FACILITY
Section I. VEHICLE PREPARATION AREA
4-1. General
will vary, depending on whether the wash station is
linear, skewed, or parallel.
CVWFs have two types of paved staging areas, each with
different functions. These are designated as the preparation and
b.
Vehicle assembly area. This area can be sized to
vehicle assembly areas. Staging involves alignment of vehicles
accommodate a company of vehicles which is as-
for orderly movement through the CVWF; in addition, vehicles
sembled as a group prior to exiting the CVWF for
are sorted according to type and washing requirements.
the cantonment area. If vehicles are allowed to
Vehicles waiting and being prepared for washing are aligned for
proceed to the cantonment area individually, the
direct entry into the designated wash stations. The preparation
vehicle assembly area requirements can be reduced
area provides troops with a location to remove trash from
or eliminated. The layout of this area is based on the
vehicle interiors, plug drain holes, open bilge pump discharge
gross width dimension of the wash station divided
lines, remove camouflage, check tiedowns, and use restroom
into the required area; however, the area should be
facilities (when provided) prior to washing the vehicles.
designed such that no vehicles in the wash stations
are slowed because of a backup of units in the
4-2. Sizing
assembly area.
The area and configuration requirements of the staging areas at
4-3. Staging area cleanup
CVWFs depend on the queuing arrangement, amount of
Hydrants should be provided adjacent to the vehicle preparation
assembly needed, and the number and types of vehicles washed.
areas to aid in cleanup of the pavement after a washing effort.
Design flow rate for these hydrants should be 25 gallons per
a.
Preparation area. The preparation area should
minute (gpm) (95 liters per minute). The location of hydrants
allow at least one vehicle to be staged behind each
must be such as to allow hose streams to move soil from all
wash station. Additional vehicles using the CVWF
portions of the paved area toward trench drains.
during a major washing effort are queued in a linear
fashion along the CVWF entrance road and/or trails
4-4. Drainage
leading to the facility. The paved preparation area
The vehicle preparation areas are sloped to drain from the edge
should be sized to accommodate a minimum of
of the pavement toward the trench drains. Trench drains may be
1000 square feet (92.9 square meters) of paved area
required in the assembly areas to facilitate drainage and
per lane. This figure includes the vehicle area and a
cleanup. Flushers are included in the trench drains to move the
minimum of 10 feet (3.0 meters) of pedestrian
dirt and debris to the collection system. Vehicle preparation
clearance in all directions between vehicles. Since
areas are generally not curbed; however, curbs may be used at
vehicles are aligned in rows according to wash
the entrance for traffic control, at locations where vehicles
station lanes, the layout of the preparation area can
might back off the pavement, or where water would otherwise
be established based on the gross width of the
run off the pavement edge and cause undermining of slab. Curbs
facility, including vehicle wash lanes, sidewalks,
used at tracked facilities should be designed to resist damage
and bypass lanes. The staging area configuration
from tracked vehicles.
Section II. WASH STATION
4-5. Function
4-6. Configuration
The wash station is the central feature of the CVWF which
The islands should be spaced in a single, straight line (as in fig
permits manual washing of both tracked and wheeled vehicles.
2-1) or skewed (fig 4-1) so that traffic lanes are parallel. This
The stations consist of concrete islands with towers placed on
design will ensure smooth traffic flow with a minimum of
either side of the lanes. The vehicles enter the lane and stop for
turning, because vehicles move in only one direction. Vehicles
washing. Water hoses are hung from towers so that they do not
waiting to be washed can queue behind those being washed.
clutter the area of vehicle movement. The stations should be
Since the vehicles always move forward, there is no hazard due
designed such that two persons can use the hoses from two
to reverse travel. The islands should have a center-to-center
adjacent towers to wash a single vehicle. This design saves time
spacing of approximately 25 feet (7.6 meters) (fig 4- 2) to allow
by allowing both sides of a vehicle or piece of equipment to be
the widest vehicle to pass easily between the islands. However,
washed at once. No solvents or detergents are used to wash
the lane width should allow only one vehicle at a time to pass
vehicles at the facility.
through the station. If the installation will wash very long
4-1
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