Latrine types & latrine construction methods.
This article discusses latrine construction & maintenance, odor control, sanitation, safety, and products or alternatives. The military use improvised latrines for human waste disposal during field exercises or missions when chemical latrines are not available.
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The terms "latrine" and "outhouse" may be used interchangeably by some authorities, but traditionally a "latrine" is an open trench or pit made for temporary use to receive urine and feces while an "outhouse" is a more-permanent, enclosed toilet facility, also over a pit, but that can provide toilet facilities lasting 8-10 years.
This artile describes how to construct a latrine and gives several different types of latrine-toilet facilities.
Separately at OUTHOUSES & LATRINES we describe how to construct an outhouse.
The following information and the sketches are based on U.S. Army Sanitation Field Manual FM 21-10 Appendix A. Note that some of the designs and suggestions may pertain only to military operations.
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0. Cat hole latrine or relief bag latrines: a cat hole latrine is a simple one-foot dug hole. The cathole latrine and other temporary latrines are completely covered over and packed down after use.
In general these shallow latrine pits are filled when waste is within one foot of the ground surface.
1. Burn-out Latrine. The burn-out latrine may be provided when the soil is hard, rocky, or frozen, making it difficult to dig a deep pit latrine. It is particularly suitable in areas with high water tables because digging a deep pit is impossible.
The burn-out latrine is not used when regulations prohibit open fires or air pollution. Personnel should urinate in a urine disposal facility rather than the burn-out latrine, as more fuel is required to burn out the liquid.
Watch out: DANGER Highly volatile fuel such as JP4 (jet propulsion fuel, grade 4) should not be used because of its explosive nature. A burn-out latrine is for military use and is not recommended for civilian applications - OPINION-DF.
2. Straddle Trench Latrine. The trench is dug 1-foot (30-centimeters) wide, 21/2-feet (75-centimeters) deep, and 4-feet (120-centimeters) long. Two feet (60 centimeters) of length are allowed per person.
These trenches, which are constructed parallel to one another, are spaced at least 2-feet (60-centimeters) apart. Since there are no seats on this type of latrine, boards may be placed along both sides of the trench to provide sure footing.
As the earth is removed, it is piled at one end of the trench, and a shovel or paddle is provided so that each soldier can promptly cover his excreta. Toilet paper is placed on suitable holders and protected from bad weather by a tin can or other covering.
The straddle trench latrine is closed, using the same method described in a(2) above.
3. Deep Pit Latrine. The deep pit is used with the standard latrine box which is issued to or built by the unit.
The two-seat box is 4-feet (120-centimeters) long, 21/2-feet (75-centimeters) wide at the base, and 18-inches (45-centimeters) high. A four-seat box 8-feet (240-centimeters) long, 21/2-feet (75-centimeters) wide at the base, and 18-inches (45-centimeters) high may be built by the unit using scrap lumber or other material.
4. Mound Latrine.
5. Pail Latrine. A pail latrine may be built when conditions (populated areas, rocky soil, and marshes) are such that a latrine of another type cannot be constructed.
A four-seat latrine box may be converted for use as a pail latrine by placing a hinged door on the rear of the box, adding a floor, and placing a pail under each seat.
If the box is located in a building, it should, if possible, be fitted into an opening made in the outer wall so that the rear door of the box can be opened from outside the building.
The seats and rear door should be self-closing, and the entire box should be made flyproof.
The floor of the box should be made of an impervious material (concrete, if possible) and should slope enough toward the rear to facilitate rapid water drainage used in cleaning the box. A urinal may also be installed in the latrine enclosure with a drainpipe leading to a pail outside. This pail should also be enclosed in a flyproof box.
The waste in pails may be disposed of by burning or by hauling to a suitable area and burying. Emptying and hauling containers of waste must be closely supervised to prevent careless spillage.
See also ANTIQUE CHAMBER POTS & CLOSE STOOLS
and don't miss the ANTIQUE LATRINE GOODRICH CASTLE
The use of plastic bag liners for pails reduces the risk of accidental spillage. The filled bags are tied at the top; they then are disposed of by burning or burial.
6. Urine Disposal Facilities.
Urine disposal facilities should be provided for the males in the command. Urine should be drained from the urinals into a soakage pit, into a standard deep pit latrine if the urinals are constructed in conjunction with the latrine, or into the chemical latrine. The urine may be drained into a pit latrine through a pipe, hose, or trough.
If a soakage pit is used, it should be dug 4-feet (1.2-meters) square and 4-feet (1.2-meters) deep and filled with rocks, flattened tin cans, bricks, broken bottles, or similar nonporous rubble.
1. Latrines are so constructed to prevent the contamination of food and water. They are located at least 100 yards (90 meters) downwind (prevailing wind) and down gradient from the unit food service facility and at least 100 feet (30 meters) from any unit ground water source.
They should never be placed above gradient of the unit food service facility. For further protection, latrines are not dug to the ground water level or in places where pit contents may drain into the water source. Usually they are built at least 30 yards (30 meters) from the border of the unit area but within a reasonable distance for easy access.
A drainage ditch is dug around the edges of the latrine enclosure to keep out rainwater and other surface water. A handwashing device is installed outside each latrine enclosure; these devices should be easy to operate and kept full of water. Each individual must wash his hands after he uses the latrine.
2. When a latrine is filled to within 1 foot (30 centimeters) of the ground surface or when it is to be abandoned, it is closed in the following manner. The pit is filled to the ground surface in 3-inch (8-centimeter) layers; each layer is compacted.
This is to prevent fly pupae from hatching and gaining access to the open air. Dirt is then compacted over the pit to form a mound at least 1-foot (30-centimeters) high. A sign is posted with the date and the words "closed latrine", if the tactical situation permits.
The latrine type list and latrine construction information above was derived from web search results for the U.S. Army Field Manual on Latrines and includes information from U.S. Army Field Manual 21-10. Also see "Field Facilities for Human Waste Disposal", Army Study Guide for more details.
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