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Corrugated Metal Box Culverts
I am attempting to model a metal box that has an opening area of 127.1 sq. ft. This corresponds to a span of 19'-10" and a rise of 7'-8". However, HEC-RAS handles this as a rectangular shape giving me an area of 152.1 sq. ft. Is the only work around to this to downsize my rectangular shape until I get an area close to what I want?
Any input would be appreciated.
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