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I <br />?r C <br />70 STEEL DRAINAGE AND HIGHWAYCONSTRUCTION PRODUCTS <br />CORRUGATED STEEL BOX CULVERTS <br />Corrugated steel box culverts approach the rectangular shape of a low wide <br />box. This is made possible by the addition of special reinforcing elements <br />to standard structural plates. The resulting combined section develops the <br />flexural capacity required by the extreme geometry. <br />Box culverts are available in spans up to 21 fl and rises to ID R-3 in. The <br />fowsdation for box culverts can be Jesigned as conventional conc:cte foot. <br />ers or, as partial steel spread looters, or as full steel invert. Table 1.31 lists <br />all available <izes. <br />Corrugated steel box culverts are designed for low, wide waterway re- <br />ouiremenit with heiehra of rnvrr buw..., r A -nA c n -A n.vn r,..a:..,,. <br />Minimum cover requirements are approximately one -tenth of the span while <br />the maximum cover is S ft. <br />Table 1.31 Layout Walls <br />. Corrugated Steel Box Culverts <br />fist <br />soak <br />n-in. <br />Arta <br />nt <br />gist. <br />n•in. <br />SOan. <br />n-ik <br />Ana <br />fit <br />b1 <br />46- <br />20.6 <br />3.9 <br />I.-m <br />41.0 <br />1.10 <br />13.6 <br />44.5 <br />2-9 <br />11.1 <br />25.7 <br />3.10 <br />174 <br />55.0 <br />2-10 <br />li-io <br />23.3 <br />3.11 <br />I4.2 <br />4g2 <br />2-II <br />124 <br />31A <br />3•II <br />18.0 <br />59.1 <br />3.1 <br />I3.3 <br />34.0 <br />4.1 <br />14-10 <br />52.0 <br />3.2 <br />13.11 <br />37.1 <br />4.1 <br />11.3 <br />63.4 <br />3.1 <br />I4.7 <br />60.4 <br />4.2 <br />10.1 <br />36.4 <br />14 <br />10.1 <br />26.4 <br />4.2 <br />15-6 <br />55.9 <br />1.5 <br />10.10 <br />31.4 <br />4.1 <br />11.2 <br />39.9 <br />1.5 <br />15.3 <br />43.3 <br />4.3 <br />19-4 <br />67.5 <br />3.6 <br />Ilb <br />34.5 <br />4.4 <br />11.10 <br />41.5 <br />3.6 <br />16-0 <br />41.3 <br />4.4 <br />16-2 <br />60.1 <br />3.6 <br />12.2 <br />37.7 <br />4:5 <br />12.6 <br />47.3 <br />1.6 <br />164 <br />51.1 <br />4-6 <br />13.2 <br />51.2 <br />J ,I ,�v -- <br />I <br />i <br />Tab <br />