Manual of Military Field Engineering for the Use of Officers And Troops of the L
Manual of Military Field Engineering for the Use of Officers And Troops of the L
United States Infantry And Cavalry School Dept O
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— Sand-bag Revetment. (Fig. 6. ) This is made by lay- ing alternate rows of headers and stretchers, breaking joints, and perpendicular to slope, seams of stretchers and chokes of headers . Being put in the embankment. Men working in pairs lay the bags, settling them firmly in place with a mallet or spade. This revetment is not very durable, but the bags are easily transported, may be used with any soil, and are invaluable in making hasty repairs and loop-holes. 135. — A very durable revetment (...Fig. 7), much used in the defenses of Washington, 1861-5, was made of posts (oak, chestnut, or cedar) cut in lengths of 5. 5 ft. And placed side by side, at a slope of six on one. The footing was a 2 in. Plank laid in a trench exca- vated for the purpose. The tops of the posts were sawed off 16 in. Below the interior crest and capped by a half-round timber, all being securely anchored in the parapet. Crowning was com- pleted to the requisite height with sod. All revetments that are liable to splinter should be crowned to a height of at least 8 in.
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