ARMY TM 10-8340-211-13AIR FORCE TO 35E5-1-1014-13. Trenching Around Tent.a.A safe rule to follow is to always trench around a tent. When the tent is pitched on heavy soil, clay, or a flatrocky surface, a trench should always be dug. When the tent is set up on a very sandy soil, which absorbs wateras fast as it falls, or when it is located on a mound which slopes off in all directions, a trench may not benecessary.b.Dig trench by cutting straight down just outside the footstop pins (figure 4-14); do not dig in a V-shape. Slope theside away from the tent. Dig trench all around the tent (figure 4-15).c.Throw dirt from trench away from the tent; never throw it against the gent, for it will quickly rot the canvas.d.In most cases, do not dig trench more than 4 or 5 inches deep and in the shallowest place not over 3 inches.There should be enough slope in the trench so that the water will flow freely toward the outlet and not back up.e.To carry the water off, dig an outlet (figure 4-15) at the lowest point of the area and connect it to the trench whichhas been dug around the lent.f.When there is a possibility that the water may flow in from higher ground, dig a ditch to divert the water before itcan reach the tent.Figure 4-14. Cross Section View of Tent Trench.4-20
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