materials are available, fabricate a wooden roof-typecover like the one shown in figure 12-6, and placed it onthe top layer of the ammunition pile.BARRICADES AND REVETMENTS.— Earthbarricades or revetments around individual piles ofammunition, similar to that shown in figure 12-7, areeasily erected and protect ammunition from fire andexplosion. Each barricade should beat least 3 feet wideat the top and 1 foot higher than the ammunition that itprotects.EXISTING BUILDINGS.— Occasiona1ly,existing buildings are used to store ammunition. Eachbuilding should be of fire-resistant construction, and itshould protect ammunition against moisture anddampness. It should have adequate ventilation and havesubstantial flooring to support the ammunition. Anexisting building should afford adequate protection tothe ammunition and adjacent areas.CAVES AND TUNNELS.— Caves and tunnels areused to store ammunition if they are reasonably dry andfree of moisture seepage. Most types of ammunitionmay be stored in caves and tunnels. In very hot climates,however, don’t store ammunition that containssmokeless powder in caves and tunnels unless they areventilated, either by natural or artificial means, toprevent the accumulation of ether fumes.OPEN STORAGE.— Ammunition is stored in theopen at advanced bases to supplement magazine space.However, when ammunition is stored outdoors, specialconsideration must be given to protecting it from theelements.Identification of Magazines and OpenStorage SitesWhen practicable, magazines, buildings used asmagazines, and piles of ammunition stored in the openare marked according to the system of identification youhave already read about. At advanced bases, theidentification system consists of two parts-a groupconstruction symbol and a symbol hazard indicator.The group construction symbol is a three-groupsymbol that consists of the following:1. A number indicating the group in which themagazine or open storage site is located,Figure 12-6.—Amnmnition protected by a wooden, roof-type cover.12-16
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