14070 Proton Road, Suite 100 LB9, Dallas, TX 75244

Shapes, Sizes and Uses of Corrugated Conduits

This table presents the various shapes, geometries and the range of sizes of corrugated steel drainage products (pipe, pipe arch and plate).

Shapes and uses of corrugated conduits
ShapeRange of SizesCommon Uses
Roundround.png6 in. -51 ftCulverts, subdrains, sewers, service
tunnels, etc. All plates same radius.
For medium and high fill (or trenches)
Vertical ellipse
5% nominal
eclipse.png4-21 ft
nominal;before elongating
Culverts, sewers, service tunnels,
recovery tunnels. Plates of varying
radii;shop favbrication. For
appearance and hwhere backfill
compaction is only moderate.
Pipe Archpipearch.pngSpan x Rise 17 in, x 13 in.
20ft 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.
Underpass*underpass.pngSpan x Rise
5ft 8 in, x 5 ft 9 in.
20 ft 4 in. x 17 ft 9 in.
For pedestrians, livestock or
vehicles (structural plate).
Archarch.pngSpan x Rise
5 ft x 1 ft 9 1/2 in.
82 ft x 42 ft
For low clearance large waterwway
openinng, and aesthetics (structural plate).
Horizontal EllipseHoriz.pngSpan
7-40 ft
Culverts, grade separations, sorm
sewers, tunnels (structural plate).
25-30 ft
Grade separations, culverts, storm
sewer, tunnels (structural plate).
High Profile
25-83 ft
Culverts, grade separations, storm
sewers and tunnels. Ammunition
magazines, earth covered storage
(structural plate).
Low Profile
20-83 ft
Low-wide waterway enclosures,
culverts, storm sewers (structural plate).
Box Culvertbox.pngSpan
10-53 ft
Low-wide waterway enclosures,
culverts, storm sewers (structural plate).
SpecialsVariousFor lining old structures or other
spcial puposes. Special fabrication.
*For equal area or clearance, the round shape is generally more economical and easier to assemble.

For additional information, see the CSP Design Manual Page 25.