Shape and Uses of Corrugated Steel Pipe
| Shape | Range of Sizes | Common Uses |
| Round | 6 in. - 26 ft. | Culverts, subdrains, sewers, service tunnels, etc. All plates same radius. For medium and high fills (or trenches). |
| Vertical ellipse 5% nominal | 4 - 21 ft. nominal; before elongating | Culverts, sewers, service tunnels, recovery tunnels. Plates of varying radii; shop fabrication. For appearance and where backfill compaction is only moderate. |
| Pipe-arch | Span x Rise 17 in. x 13 in. to 20 ft. 7 in. x 13 ft. 2 in. |
Where headroom is limited. Has hydraulic advantages at low flows. Corner plate radius, 18 inches or 31 inches for structural plate. |
| Horizontal Ellipse | Span 7 - 40 ft. | Culverts, grade separations, storm sewers, tunnels. |
| Specials | Various | For lining old structures or other special purposes. Special fabrication. |
| *For equal area or clearance, the round shape is generally more economical and simpler to assemble. | ||
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