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<br />but the most common use of stone is for headwalls where a rustic or scenic <br />appearance is desired. A stone arch culvert is shown in exhibit 13. While <br />brick is rarely used for culvert barrels, it is frequently used in the <br />construction of manholes and inlets in storm drainage systems. <br /> <br /> <br />Exhibit 13. <br /> <br />Masonry arch culvert. In some areas <br />and masonry box culverts are common. <br />foundations these culverts have long <br />lives. <br /> <br />masonry arches <br />With good <br />service <br /> <br />3-1.7 Other Culvert Materials. <br /> <br />Aluminum, steel, concrete, and stone masonry are the most commonly found <br />materials for existing culverts. There are several other materials which may <br />be encountered during culvert inspections, including timber, as shown in <br />exhibit 14, cast iron, stainless steel, terra cotta, asbestos cement, and <br />plastic. These materials are not commonly found in many areas because they <br />are either relatively new (plastic), labor intensive (masonry), or used for <br />specialized situations (stainless steel and cast iron). <br /> <br />24 <br />