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Shapes and Uses of Corrugated Conduits

ShapeImageRange of SizesCommon Uses
Round DS CP ROUND.jpg 6 in. - 52 ft. Culverts, sub drains, sewers, service tunnels, etc.
All plates same radius.
For medium and high fill (or trenches).
Vertical Ellipse
5% normal
DS CP VERT ELLIPSE.jpg 4 ft. - 21 ft. Culverts, sewers, service tunnels, recovery tunnels.
Plates of varying radii, shop fabrication.
For appearance and where back fill compaction is only moderate.
Pipe Arch DS CP PIPE ARCH.jpg 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.
Underpass DS CP UNDERPASS.jpg Span x Rise
5 ft. 8 in. x 5 ft. 9 in.
to
20 ft. 4 in. x 17 ft. 9 in.
For pedestrians, livestock or vehicles (structural plate).
Arch DS CP ARCH.jpg Span x Rise
5 ft. x 1 ft. 9 1/2 in.
to
82 ft. x 42 ft.
For low clearance large waterway opening, and aesthetics (structural plate).
Horizontal Ellipse DS CP HOR ELLIPSE.jpg Span
7 ft. - 40 ft.
Culverts, grade separations, storm sewers, tunnels (structural plate).
Pear DS CP PEAR 1.jpg Span
25 ft. - 30 ft.
Grade separations, culverts, storm sewers, tunnels (structural plate).
High Profile Arch DS CP HI PRO ARCH.jpg Span
25 ft. - 83 ft.
Culverts, grade separations, storm sewers and tunnels.
Ammunition magazines, earth covered storage (structural plate).
Low Profile Arch DS CP LO PRO ARCH.jpg Span
20 ft. - 83 ft.
Low-wide waterway enclosures, culverts, storm sewers (structural plate).
Box Culvert DS CP BOX CULVERT.jpg Span
10 ft. - 53 ft.
Low-wide waterway enclosures, culverts, storm sewers (structural plate).

Design Specifications

AgencySpecifications
AASHTO Standard Specifications for Highway Bridges-Division 1, Section 12 LRFD Bridge Design Specifications - Section 12
ASTM Standard Practice for Structural Design of Corrugated Steel Pipe, Pipe Arches, and Arches for Storm and Sanitary Sewers and Other Buried Applications - ASTM A796
AREMA Manual for Railway Engineering - Section 4.9

Diameter for Corrugated Steel Pipe

Inside DiameterCorrugation Pattern
4" to 18" 1 1/2" x 1/4"
12" to 84" 2 2/3" x 1/2"
36" to 144" 3" x 1"
36" to 144" 5" x 1"
  • Corrugated steel pipe is usually comes in 20' and 24' lengths. But shorter or longer lengths can be provided.

Installation Specifications

AgencySpecifications
AASHTO Standard Specifications for Highway Bridges-Division II, Section 26 LRFD Bridge Construction Specifications
ASTM Standard Practice for Installing Factory Made Corrugated Steel Pipe for Sewers and Other Applications - ASTM A798
Standard Practice for Installing Corrugated Steel Structural Plate Pipe for Sewers and Other Applications - ASTM A807
AREMA Manual for Railway Engineering - Section 4.12
U.S. Dept. of Agriculture -
Natural Resources
Conservation Service Construction Specification Section 51 Paragraph 6 Service
U.S. Dept. of Agriculture -
Forest Service
Specification for Construction of Roads and Bridges, Section 603.04 through 603.08.
Federal Lands Highway FP92 Section 602.03, 602.05, 602.07, and 602.08

Material Description and Specifications

Material

Group No.

DescriptionSpecifications
Zinc Coated
sheets & coils
Steel base metal* with 2 oz per ft2 zinc coating AASHTO M218 - ASTM A929M
Polymer Coated Sheets and Coils Polymer coatings applied to sheets* and coils* , 0,010 in. both sides AASHTO M246 - ASTM A742M
Aluminum Coated
coils - type 2
Steel base metal* coated with 1 ox. per ft2 of pure aluminum AASHTO M274 - ASTM A929M
Sewer and
Drainage Pipe
Corrugated pipe fabricated from any of the above sheets of coils. Pipe is fabricated by corrugating continious coils into helical form with lock seam or welded seam, or by rolling annular corrugated mill sheets and riveting or spot welding seams:
1. Galvanized corrugated steel pipe
2. Polymeric pre-coated sewer and drainage pipe
3. Aluminized Type 2 corrugated steel pipe
4. Structual plate pipe



AASHTO M36 - ASTM A760M
AASHTO M245 - ASTM A762M
AASHTO M274 - ASTM A760M
AASHTO M167 - ASTM A761M
Ashalt Coated Steel Sewer Pipe Corrugated steel pipe of any of the types shown above with a 0.050 in. asphalt coating AASHTO M190 - ASTM A849
Invert Paved Seel Sewer Pipe Corrugated steel pipe of any one of the types shown above;
1. Ashalt coated pipe with 0.050 in. ashpalt coating and pavement poured in the invert to cover the currgation by 1.8 in.
2. With a field applied 3 in. (3250 psi) concrete invert or 1 1/2 in. high strength (9600 psi) concrete invert.
3. With polymer material applied 0.050 in. above the crest in the invert.
AASHTO M190 - ASTM A849

ASTM A849

ASTM A849
Fully Lined Steel
Sewer Pipe
Corrugated steel pipe of the types shown above:
1. With an internal asphalt lining centrifugally spun in place.
2. With an internal concrete lining in place.
3. Corrugated steel pipe with a smooth steel liner integrally formed with the corrugated shell or.
4. Corrugated steel pipe with a single thickness of smooth sheet fabricated with helical ribs porjected outward or.
5. With concrete pavement and linings installed in the field.

AASHTO M190 - ASTM A849
AASHTO M36 - ASTM A849
AASHTO M36 - ASTM A760M

AASHTO M36 - ASTM A760M
ASTM A979M
Cold Applied Bituminous Coatings Mastic or coal tar base coating of various viscosities for field or sho coating of corrugated pipe or structural plate. AASHTO M243 - ASTM A849
Gaskets and
Sealants
1. Standard O-ring gaskets
2. Sponge neonprene sleeve gaskets
3. Gasketing strips, butyl or nioprene
4. Mastic sealant
ASTM D1056

ASTM C361

Federal Highway Administration (FHWA) Abrasion Levels

LevelTypeDescription
Level 1 Non-Abrasion No bed load regardless of velocity or storm sewer application.
Level 2 Low Abrasion Minor bed loads of sand and gravel and celocities of 5 ft/sec or less.
Level 3 Moderate Abrasion Bed loads of sand and small stone or gravel with velocities between 5 and 15 ft/sec.
Level 4 Severe Abrasion Heavy bed loads of gravel and rock with velocities exceeding 15 ft/sec.
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