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Shapes and Uses of Corrugated Conduits |
Shapes and uses of corrugated conduits
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Shape
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Range of Sizes
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Common Uses
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Round
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6 in. -51 ft
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Culverts, subdrains, sewers, service
tunnels, etc. All plates same radius.
For medium and high fill (or trenches)
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Vertical ellipse
5% nominal
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4-21 ft
nominal;before elongating
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Culverts, sewers, service tunnels,
recovery tunnels. Plates of varying
radii;shop favbrication. For
appearance and hwhere backfill
compaction is only moderate.
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Pipe Arch
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Span x Rise 17 in, x 13 in.
to
20ft 7 in x
13 ft 2 in.
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Where headroom is limited, Has
hydraulic advantages at low flows.
Corner plate radius. 18 inches or
31 inches for structural plate.
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Underpass*
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Span x Rise
5ft 8 in, x 5 ft 9 in.
to
20 ft 4 in. x 17 ft 9 in.
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For pedestrians, livestock or
vehicles (structural plate).
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Arch
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Span x Rise
5 ft x 1 ft 9 1/2 in.
to
82 ft x 42 ft
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For low clearance large waterwway
openinng, and aesthetics (structural plate).
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Horizontal Ellipse
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Span
7-40 ft
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Culverts, grade separations, sorm
sewers, tunnels (structural plate).
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Pear
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Span
25-30 ft
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Grade separations, culverts, storm
sewer, tunnels (structural plate).
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High Profile
Arch
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 |
Span
25-83 ft
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Culverts, grade separations, storm
sewers and tunnels. Ammunition
magazines, earth covered storage
(structural plate).
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Low Profile
Arch
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Span
20-83 ft
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Low-wide waterway enclosures,
culverts, storm sewers (structural plate).
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Box Culvert
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Span
10-53 ft
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Low-wide waterway enclosures,
culverts, storm sewers (structural plate).
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Specials
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Various
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For lining old structures or other
spcial puposes. Special fabrication.
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Notes:
*For equal area or clearance, the round shape is generally more economical and easier to assemble.
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For additional information, see the CSP Design Manual Page 25.
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