cmp design guide

INNOVATIVE SITE SOLUTIONS & STORMWATER MANAGEMENT

CorrugatedMetal PipeDesign Guide

Temporary Cover ForConstruction Loads Finished

GradeHeight-Of-Cover

Bedding

Backfill

D

Corrugated Metal PipeDesign Guide

Table of Contents

Drainage Pipe SelectionIntroduction .................................................................................. 4Environment and Abrasion Guidelines ............................................. 5Usage Guide for Drainage Products ................................................ 5Product Dimensions and Hydraulics ................................................. 6Reference Specifications ................................................................ 7

Corrugated Steel PipeHeight of Cover Tables ................................................................... 8Handling Weights ....................................................................... 11Installation .................................................................................. 12

Corrugated Aluminum PipeHeight of Cover Tables ................................................................. 13Handling Weights ....................................................................... 15Installation .................................................................................. 16

ULTRA-FLOHeight of Cover Tables ................................................................. 17Handling Weight ......................................................................... 18Installation .................................................................................. 19


Durability Design Guide for DrainageProductsProper design of culverts and storm sewers requiresstructural, hydraulic, and durability considerations. Whilemost designers are comfortable with structural andhydraulic design, the mechanics of evaluating abrasion,corrosion, and water chemistry to perform a durabilitydesign are not commonly found in most civil engineeringhandbooks.

The durability and service life of a drainage pipe installation isdirectly related to the environmental conditions encountered atthe site and the type of materials and coatings from which theculvert is fabricated. Two principle causes of early failure indrainage pipe materials are corrosion and abrasion.

Service life can be affected by the corrosive action of thebackfill in contact with the outside of a drainage pipe ormore commonly by the corrosive and abrasive action of theflow in the invert of the drainage pipe. The design lifeanalysis should include a check for both the water side andsoil side environments to determine which is more critical—or which governs service life.

The potential for metal loss in the invert of a drainage pipedue to abrasive flows is often overlooked by designers andits effects are often mistaken for corrosion. An estimate forpotential abrasion is required at each pipe location in orderto determine the appropriate material and gauge.

This manual is intended to guide specifiers through themechanics of selecting appropriate drainage products tomeet service life requirements. The information contained inthe following pages is a composite of several nationalguidelines.

Using the Design GuideThe choice of material, gauge and product type can beextremely important to service life. The following stepsdescribe the procedure for selecting the appropriatedrainage product, material, and gauge to meet a specificservice life requirement.

Design Sequence1. Select pipe or structure based on hydraulic and clearance

requirements. Use Tables 4 and 5 as reference for sizelimits and hydraulic properties of all drainage products.

2. Use height-of-cover tables for the chosen pipe orstructure to determine the material gauge required forthe specific loading condition.

3. Use Table 1 to select the appropriate material for thesite-specific environmental conditions. Wheneverpossible, existing installations of drainage structuresalong the same water course offer the most reliableestimate of long-term performance for specificenvironment conditions. In many cases, there will bemore than one material that is appropriate for theproject environmental conditions. Generally speaking,the metal material types increase in price as you movefrom top down on Table 1. Please contact your localCONTECH Sales Engineer for pricing.

4. Use Table 2 to determine which abrasion level mostaccurately describes the typical storm event (2 yearstorm). The expected stream velocity and associatedabrasion conditions should be based on a typical flowand not a 10 or 50-year design flood.

5. Use Table 3 to determine whether the structural gaugefor the selected material is sufficient for the designservice life. If the structural gauge is greater than orequal to the gauge required for a particular abrasioncondition and service life, use the structural gauge.Conversely, if the structural gauge is less than thegauge required for a particular abrasion condition andservice life, use the gauge required by Table 3.

4

5

Tabl

e 2

— F

HWA

Abra

sion

Gui

delin

esA

bra

sio

nA

bra

sio

nB

ed L

oa

dFl

ow

Vel

oci

tyLe

vel

Co

nd

itio

n(f

ps)

1N

on- A

bras

ive

Non

eM

inim

al2

Low

Abr

asio

nM

inor

< 5

3M

oder

ate

Abr

asio

nM

oder

ate

5 - 1

54

Seve

re A

bras

ion

Hea

vy>

15

“Int

erim

Dire

ct G

uide

lines

on

Dra

inag

e Pi

pe A

ltern

ativ

e Se

lect

ion.

” F

HW

A, 1

993.

*A

pp

rop

ria

te p

H r

ang

e fo

r G

alv

ani

zed

Ste

el is

5.8

to 1

0

Tabl

e 1

— R

ecom

men

ded

Envi

ronm

ents

Ma

teri

al T

yp

eSo

il* a

nd

Wa

ter

pH

Res

isti

vit

y (

oh

m-c

m)

34

56

78

910

1112

Min

imu

mM

ax

imu

m *

Gal

vani

zed

Stee

l*20

0080

00A

lum

iniz

ed S

teel

Typ

e 2

1500

N/A

Poly

mer

Coa

ted

250

N/A

Alu

min

um A

lloy

500

N/A

Rein

forc

ed C

oncr

ete

1000

N/A

Plas

tic (P

VC o

r H

DPE

) N

/AN

/A

CM

P (

1/2

" o

r 1

" d

eep

co

r ru

ga

tio

ns )

Min

imum

gau

ge C

MP

requ

ired

to m

eet d

esig

n se

rvic

e lif

e.G

alva

nize

d (2

oz.

)16

1410

814

128

8112

110

1N

/AN

/AA

spha

lt C

oate

d16

1410

814

128

8112

110

1N

/AN

/AA

spha

lt C

oate

d an

d Pa

ved

Inve

rt16

1614

1016

1412

812

8N

/AN

/AA

lum

iniz

ed T

ype

216

1616

1416

1614

1214

141 /

1212

1 /10

101

Poly

mer

Coa

ted

1616

1616

1616

1412

1414

1 /12

121 /

1010

1

Alu

min

um A

lloy

1616

1616

1616

1412

1414

1 /12

121 /

1010

1 /8

Con

cret

e Li

ned

1616

1616

1616

1414

1614

1212

ULT

RA

-FLO

3

(3/4

" x

3/4

" x

7 1

/2"

corr

uga

tion)

Gal

vani

zed

(2 o

z.)

1614

10N

/AA

lum

iniz

ed T

ype

216

1616

14Po

lym

er C

oate

d16

1616

16A

lum

inum

Allo

y16

1616

16Sm

ooth

Cor

2,3

Poly

mer

Coa

ted

1616

1616

Pla

stic

Pip

e

Poly

-vin

yl C

hlor

ide

(PVC

)H

igh

Den

sity

Pol

yeth

ylen

e (H

DPE

)R

einf

orce

d C

oncr

ete

Pip

e

Rura

lM

inor

Maj

orU

rban

Rura

lM

inor

Maj

orU

rban

Rura

lM

inor

Maj

orU

rban

2550

7510

025

5075

100

2550

7510

0

Tabl

e 3

— D

rain

age

Prod

uct U

sage

Gui

de

Pipe

Ap

plic

ati

on

Ro

ad

wa

y C

lass

ific

ati

on

Des

ign

Ser

vic

e Li

fe

Ab

rasi

on

Lev

elA

bra

sio

n L

evel

1 &

2A

bra

sio

n L

evel

4A

bra

sio

n L

evel

3

Sto

rm D

rain

, Cro

ss D

rain

, Med

ian

Dra

in, S

ide

Dra

in

Min

imum

gau

ge U

LTRA

-FLO

requ

ired

to m

eet d

esig

n se

rvic

e lif

e

Min

imum

gau

ge S

moo

thC

or r

equi

red

to m

eet d

esig

n se

rvic

e lif

e

PVC

with

sm

ooth

inte

rior

and

corr

ugat

ed e

xter

ior

perm

itted

in 2

5-1

00

yea

rs s

ervi

ce li

feH

DPE

per

mitt

ed in

app

licat

ions

requ

iring

25

and

50

yea

r se

rvic

e liv

es o

nly.

Plas

tic p

ipe

is g

ener

ally

not

reco

mm

ende

d fo

r us

ein

app

licat

ions

with

Lev

el 4

abr

asio

n

ULT

RA-F

LO p

ipe

is u

sed

for

stor

m s

ewer

app

licat

ions

.St

orm

sew

ers

rare

ly a

chie

ve A

bras

ion

Leve

l 3 o

r 4

.Pl

ease

con

tact

you

r Sa

les

Engi

neer

for

appl

icat

ions

abo

ve A

bras

ion

Leve

l 2.

Smoo

thC

or S

teel

pip

e is

use

d fo

r st

orm

sew

er a

pplic

atio

ns. S

torm

sew

ers

rare

ly a

chie

ve A

bras

ion

Leve

l 3 o

r 4

.Pl

ease

con

tact

you

r Sa

les

Engi

neer

for

appl

icat

ions

abo

ve A

bras

ion

Leve

l 2.

A 7

or

8 s

ack

mix

is r

ecom

men

ded

RCP

acce

ptab

le fo

r Le

vels

1-3

Ad

just

men

ts f o

r A

bra

sio

nTa

ble

3 m

akes

adj

ustm

ents

to g

auge

and

coa

ting,

in a

ccor

danc

e w

ith F

HW

A r

ecom

men

datio

ns, b

ased

on

abra

sion

pot

entia

l and

req

uire

d se

rvic

e lif

e.St

eel:

For

abra

sion

leve

ls 1

& 2

, no

addi

tiona

l inv

ert p

rote

ctio

n is

nee

ded.

For

abr

asio

n le

vel 3

, inc

reas

e th

e th

ickn

ess

by o

ne g

auge

or

add

inve

rt pr

otec

tion.

At a

bras

ion

leve

l 4, i

ncre

ase

the

thic

knes

s by

one

gau

ge a

nd a

dd in

vert

prot

ectio

n.A

lum

inum

: Fo

r ab

rasi

on le

vels

1 ,

2, &

3 n

o ad

ditio

nal i

nver

t pro

tect

ion

is n

eede

d. A

t abr

asio

n le

vel 4

, inc

reas

e th

e th

ickn

ess

by o

ne g

auge

and

add

inve

rt pr

otec

tion.

1.Re

quire

s a

field

app

lied

conc

rete

pav

ed in

vert

with

min

imum

thic

knes

s 1"

abo

ve c

orru

gatio

n cr

ests

. In

som

e ca

ses,

add

ing

one

gaug

e ca

n be

sub

stitu

ted

for

the

conc

rete

pav

ed in

vert

2.Sm

ooth

Cor

Ste

el P

ipe

com

bine

s a

corr

ugat

ed s

teel

ext

erio

r sh

ell w

ith a

hyd

raul

ical

ly s

moo

th in

terio

r lin

er.

3.Se

rvic

e lif

e es

timat

es fo

r U

LTRA

-FLO

and

Sm

ooth

Cor

Pip

e as

sum

e a

stor

m s

ewer

app

licat

ion.

For

app

licat

ions

oth

er th

an s

torm

sew

ers

or a

bras

ion

cond

ition

s ab

ove

Abr

asio

n Le

vel 2

, ple

ase

cont

act y

our

CO

NTE

CH

Sal

es E

ngin

eer

for

gaug

e an

d co

atin

g re

com

men

datio

ns.


6

*For larger sizes please contact your CONTECH Sales Engineer

Drainage Product Common Manning’sUses Minimum Maximum “n” Value

Corrugated Steel (1/2" deep corrugation) 12" 84" 0.011 - 0.021Corrugated Steel with Paved Invert (1/2" deep corrugation) 12" 84" 0.014 - 0.020Corrugated Steel (1" deep corrugation) 54" 144" 0.022 - 0.027Corrugated Steel with Paved Invert (1" deep corrugation) 54" 144" 0.019 - 0.023Corrugated Aluminum (1/2" deep corrugation) 12" 72" 0.011 - 0.021Corrugated Aluminum (1" deep corrugation) 30" 120" 0.023 - 0.027ULTRA-FLO® Steel 18" 102" 0.012ULTRA-FLO Aluminum 18" 84" 0.012SmoothCor™ Steel (1/2" deep corrugation) 18" 66" 0.012SmoothCor™ Steel (1" deep corrugation) 48" 138" 0.012Corrugated Steel Concrete Lined (1/2" deep corrugation) 24" 48" 0.012Corrugated Steel Concrete Lined (1" deep corrugation) 54" 120" 0.012PVC (Smooth interior, corrugated exterior) 12" 36" 0.009HDPE (Smooth interior, corrugated exterior) 12" 60" 0.012 - 0.017Reinforced Concrete 15" 120" 0.012Corrugated Steel (1/2" deep corrugation) 17" x 13" 83" x 57" 0.011 - 0.021Corrugated Steel with Paved Invert (1/2" deep corrugation) 17" x 13" 83" x 57" 0.014 - 0.019Corrugated Steel (1" deep corrugation) 53" x 41" 142" x 91" 0.023 - 0.027Corrugated Steel with Paved Invert (1" deep corrugation) 53" x 41" 142" x 91" 0.019 - 0.022Corrugated Aluminum (1/2" deep corrugation) 17" x 13" 71" x 47" 0.011 - 0.021Corrugated Aluminum (1" deep corrugation) 60" x 46" 112" x 75" 0.023 - 0.027ULTRA-FLO Steel 20" x 16" 66" x 51"* 0.012ULTRA-FLO Aluminum 20" x 16" 66" x 51"* 0.012SmoothCor Steel (1/2" deep corrugation) 21" x 15" 77" x 52" 0.012SmoothCor Steel (1" deep corrugation) 53" x 41" 137" x 87" 0.012Elliptical Reinforced Concrete 23" x 14" 106" x 68" 0.012

Size Limits

Table 4 — Product Dimensions

Culverts, smallbridges, storm

water detention/retention systems,conduits, tunnels,

storm sewers.

Storm sewers,culverts, storm

water detention/retention systems.

Culverts, smallbridges, storm

water detention/retention systems,conduits, tunnels,

storm sewers.

Storm sewers,culverts, storm

water detention/retention systems.

Ro

un

d P

ipe

Pip

e-A

rch

*Tests on helically corrugated pipe demonstrate a lower coefficient ofroughness than for annually corrugated steel pipe. Pipe-arches approx-imately have the same roughness characteristics as their equivalent roundpipes.

Table 5 — Corrugated Steel Pipe—Values of Coefficient of Roughness (n)

60 in.

2-2/3” x 1/2” Annular 8 in. 10 in. 12 in. 15 in. 18 in. 24 in. 36 in. 48 in. and Larger

Unpaved 0.024 0.012 0.014 0.011 0.012 0.013 0.015 0.018 0.020 0.021PAVED-INVERT 0.021 0.014 0.017 0.020 0.019SMOOTH-FLO 0.012 0.012 0.012 0.012 0.012HEL-COR CL 0.012 0.012 0.012 0.012 0.012SmoothCor N/A 0.012 0.012 0.012 0.012 0.012

3” x 1” Annular 36 in. 42 in. 48 in. 54 in. 60 in. 66 in. 72 in. 78 in. and Larger

Unpaved 0.027 0.022 0.022 0.023 0.023 0.024 0.025 0.026 0.027PAVED-INVERT 0.023 0.019 0.019 0.020 0.020 0.021 0.022 0.022 0.023SMOOTH-FLO 0.012 0.012 0.012 0.012 0.012 0.012 0.012HEL-COR CL 0.012 0.012 0.012 0.012 0.012 0.012SmoothCor N/A 0.012 0.012 0.012 0.012 0.012 0.012

5” x 1” 48 in. 54 in. 60 in. 66 in. 72 in. 78 in. and Larger

Unpaved 0.025 0.022 0.022 0.023 0.024 0.024 0.025PAVED-INVERT 0.022 0.019 0.019 0.020 0.021 0.021 0.022SMOOTH-FLO 0.012 0.012 0.012 0.012 0.012HEL-COR CL 0.012 0.012 0.012 0.012 0.012

ULTRA-FLO

AllDiameters

1-1/2” x 1/4”

Helical* Corrugation

Helical—2-2/3” x 1/2”

Helical*—3” x 1”

Helical*—5” x 1”

3/4” x 3/4” x 7-1/2”All diameters n = 0.012

7

Pip

e &

Pip

e A

rch

Table 6 - AASHTO Reference Specifications

Material Type Material Pipe Design* Installation*

CMP (1/2" or 1" deep corrugations)

Galvanized (2 oz.) M218 M36 Section 12 Section 26Asphalt Coated M190 M36 Section 12 Section 26Asphalt Coated and Paved Invert M190 M36 Section 12 Section 26Aluminized Type 2 M274 M36 Section 12 Section 26Polymer Coated M246 M36 & M245 Section 12 Section 26Aluminum Alloy M197 M196 Section 12 Section 26Concrete Lined M218 & M274 M36 Section 12 Section 26ULTRA-FLO

(3/4" x 3/4" x 7-1/2" corrugation)

Galvanized (2 oz.) M218 M36 Section 12 Section 26Aluminized Type 2 M274 M36 Section 12 Section 26Polymer Coated M246 M36 & M245 Section 12 Section 26Aluminum Alloy M197 M196 Section 16 Section 26SmoothCor

Polymer Coated M246 M36 & M245 Section 12 Section 26Plastic Pipe

Poly-vinyl Chloride (PVC) Section 18 M304 Section 18 Section 30High Density Polyethylene (HDPE) Section 18 M294 Section 18 Section 30Reinforced Concrete Pipe M170 M170 Section 8 Section 27

Elliptical Concrete Pipe M207 M207 Section 8 Section 27*AASHTO Standard Specification for Highway Bridges.


Heights-of-Cover

2-2/3" x 1/2" Height-of-Cover Limits for Corrugated Steel Pipe

Heights-of-cover notes

1. These tables are for lock-seam or welded-seam construction. They are notfor riveted construction. Consult your CONTECH Sales Engineer forheight-of-cover tables on riveted pipe.

2. These values, where applicable, were calculated using K=0.86 asadopted in the AISI Handbook, Fifth Edition, 1994.

3. The haunch areas of a pipe-arch are the most critical zone forbackfilling. Extra care should be taken to provide good material andcompaction to a point above the spring line.

4. E 80 minimum cover is measured from top of pipe to bottom of tie.5. H 20 and H 25 minimum cover is measured from top of pipe to bottom

of flexible pavement or top of rigid pavement.6. The H 20 and H 25 pipe-arch tables are based on 2 tons per square foot

corner bearing pressures.7. The E 80 pipe-arch tables minimum and maximum covers are based on

the corner bearing pressures shown. These values may increase ordecrease with changes in allowable corner bearing pressures.

8. 0.052" is 18 gauge.0.064" is 16 gauge.0.079" is 14 gauge.0.109" is 12 gauge.0.138" is 10 gauge.0.168" is 8 gauge.

9. For construction loads, see Page 12.10. 1-1/2” x 1/4” corrugation. H20, H25 and E80 loading.11. SmoothCor and HEL-COR Concrete Lined have same height-of-cover

properties as corrugated steel pipe. The exterior shell of SmoothCor ismanufactured in either 2-2/3” x 1/2” or 3 x 1 corrugations; maximumexterior shell gauge is 12.

Corrugated Steel Pipe

8

H 20 and H 25 Live Loads

Diameter Minimumor Span, Cover,Inches Inches 0.052 0.064 0.079 0.109 0.138 0.168

610 12 388 486 810 291 3651010 233 39212 198 248 31015 158 199 24818 132 166 20721 113 142 178 24924 99 124 155 21830 79 99 124 17436 66 83 103 145 18642 56 71 88 124 160 19548 62 77 109 140 17154 66 93 122 15060 79 104 12866 68 88 10972 75 9378 7984 12 66

E 80 Live Loads

Diameter Minimumor Span, Cover,Inches Inches 0.052 0.064 0.079 0.109 0.138 0.168

12 12 198 248 31015 158 199 24818 132 166 20721 113 142 178 24924 99 124 155 21830 79 99 124 17436 66 83 103 145 18642 56 71 88 124 160 19548 12 62 77 109 140 17154 18 66 93 122 15060 79 104 12866 68 88 10972 18 75 9378 24 7984 24 66

Maximum Cover, FeetSpecified Thickness, Inches

Maximum Cover, FeetSpecified Thickness, Inches

H 20 and H 25 Live Loads, Pipe-Arch

MinimumRound Structural Minimum

Equivalent, Span x Rise, Thickness, Cover,Inches Inches Inches Inches

15 17 x 13 0.064 12 1618 21 x 15 0.064 1521 24 x 18 0.06424 28 x 20 0.06430 35x 24 0.06436 42 x 29 0.06442 49 x 33 0.064*48 57 x 38 0.064*54 64 x 43 0.079*60 71 x 47 0.109*66 77 x 52 0.109*72 83 x 57 0.138* 12 15

MaximumCover, Feet

Size

2 Tons/Ft.2 CornerBearing Pressure

MaximumCover, Feet

3 Tons/Ft.2 CornerBearing Pressure

Size

E 80 Live Loads, Pipe-Arch

MinimumRound Structural Minimum

Equivalent, Span x Rise, Thickness, Cover,Inches Inches Inches Inches

15 17 x 13 0.079 24 2218 21 x 15 0.07921 24 x 18 0.10924 28 x 20 0.10930 35 x 24 0.13836 42 x 29 0.13842 49 x 33 0.138*48 57 x 38 0.138*54 64 x 43 0.138*60 71 x 47 0.138* 24 22

* These values are based on the AISI Flexibility Factor limit (0.0433 x 1.5)for pipe-arch. Due to variations in arching equipment, thicker gaugesmay be required to prevent crimping of the haunches.


1. These tables are for lock-seam or welded-seam construction. They arenot for riveted construction. Consult your CONTECH Sales Engineer forheight-of-cover tables on riveted pipe.


3. The span and rise shown in these tables are nominal. Typically theactual rise that forms is greater than the specified nominal. This actualrise is within the tolerances as allowed by the AASHTO & ASTMspecifications. The minimum covers shown above take in toconsideration this plus tolerance on rise.



of flexible pavement or top of rigid pavement.7. The H 20 and H 25 pipe-arch tables are based on 2 tons per square

foot corner bearing pressures.8. The E 80 pipe-arch tables minimum and maximum covers are based on



10. For construction loads, see Page 12.11. SmoothCor and HEL-COR Concrete Lined have same height-of-cover


9

Heights-of-Cover

5" x 1" or 3" x 1" Height-of-Cover Limits forCorrugated Steel Pipe


Diameter Minimumor Span, Cover

Inches Inches 0.064 0.079 0.109 0.138 0.168

54 12 56 70 98 126 155 60 50 63 88 114 139 66 46 57 80 103 126 72 42 52 73 95 116 78 39 48 68 87 107 84 36 45 63 81 99 90 33 42 59 76 93 96 12 31 39 55 71 87102 18 29 37 52 67 82108 35 49 63 77114 32 45 58 71120 30 41 54 66126 39 50 62132 36 47 57138 33 43 53144 18 39 49

Maximum cover heights shown are for 5” x 1”.

To obtain maximum cover for 3" x 1", increase these values by 13%

E 80 Live Loads

Diameter Minimumor Span, Cover

Inches Inches 0.064 0.079 0.109 0.138 0.168

54 18 56 70 98 126 15560 50 63 88 114 13966 46 57 80 103 12672 18 42 52 73 95 11678 24 39 48 68 87 10784 36 45 63 81 9990 33(1) 42 59 76 9396 24 31(1) 39 55 71 87

102 30 29(1) 37 52 67 82108 35 49 63 77114 32(1) 45 58 71120 30 30(1) 41 54 66126 36 39 50 62132 36 47 57138 33(1) 43 53144 36 39 49

Maximum cover heights shown are for 5” x 1”.To obtain maximum cover for 3" x 1", increase these values by 13%.(1) These diameters in these gauges require additional minimum cover.

Maximum Cover, Feet

Specified Thickness, Inches

Maximum Cover, Feet

Specified Thickness, Inches

5" x 1" Pipe-Arch Height-of-Cover Limits forCorrugated Steel Pipe


MinimumEquivalent Specified Minimum

Pipe Span x Rise Thickness, Cover 2 Tons/Ft.2 CoverDiameter Inches Inches* Inches Bearing Pressure

72 81 x 59 0.109 18 2178 87 x 63 0.109 18 2084 95 x 67 0.109 18 2090 103 x 71 0.109 18 2096 112 x 75 0.109 21 20

102 117 x 79 0.109 21 19108 128 x 83 0.109 24 19114 137 x 87 0.109 24 19120 142 x 91 0.138 24 19

E 80 Live Loads



72 81 x 59 0.109 30 2178 87 x 63 0.109 30 1884 95 x 67 0.109 30 1890 103 x 71 0.109 36 1896 112 x 75 0.109 36 18

102 117 x 79 0.109 36 17108 128 x 83 0.109 42 17114 137 x 87 0.109 42 17120 142 x 91 0.138 42 17

*Some 3" x 1" and 5" x 1" minimum gauges shown for pipe-arch are dueto manufacturing limitations.

MaximumCover, Feet

Size

MaximumCover, Feet

Size



1. These tables are for lock-seam or welded-seam construction. They are notfor riveted construction. Consult your CONTECH Sales Engineer forheight-of-cover tables on riveted pipe.


3. The span and rise shown in these tables are nominal. Typically the actualrise that forms is greater than the specified nominal. This actual rise iswithin the tolerances as allowed by the AASHTO & ASTM specifications.The minimum covers shown above take in to consideration this plustolerance on rise.



of flexible pavement or top of rigid pavement.7. The H 20 and H 25 pipe-arch tables are based on 2 tons per square

foot corner bearing pressures.8. The E 80 pipe-arch tables minimum and maximum covers are based on



10. For construction loads, see Page 12.11. SmoothCor and HEL-COR Concrete Lined have same height-of-cover


3" x 1" Pipe-Arch Height-of-Cover Limits forCorrugated Steel Pipe Arch




48 53 x 41 0.079 12 2554 60 x 46 0.079 15 2560 66 x 51 0.079 15 2566 73 x 55 0.079 18 2472 81 x 59 0.079 18 2178 87 x 63 0.079 18 2084 95 x 67 0.079 18 2090 103 x 71 0.079 18 2096 112 x 75 0.079 21 20

102 117 x 79 0.109 21 19108 128 x 83 0.109 24 19114 137 x 87 0.109 24 19120 142 x 91 0.138 24 19

Larger sizes are available in some areas of the United States.Check with your local CONTECH Sales Engineer.

Some minimum heights-of-cover for pipe-arches have been increased to takeinto account allowable “plus” tolerances on the manufactured rise.

E 80 Live Loads



48 53 x 41 0.079 24 25 54 60 x 46 0.079 24 25 60 66 x 51 0.079 24 25 66 73 x 55 0.079 30 24 72 81 x 59 0.079 30 21 78 87 x 63 0.079 30 18 84 95 x 67 0.079 30 18 90 103 x 71 0.079 36 18 96 112 x 75 0.079 36 18102 117 x 79 0.109 36 17108 128 x 83 0.109 42 17114 137 x 87 0.109 42 17120 142 x 91 0.138 42 17

*Some 3" x 1" and 5" x 1" minimum gauges shown for pipe-arch are dueto manufacturing limitations.

Note: Sewer gauge (trench conditions) tables for corrugated steel pipe canbe found in the AISI book “Modern Sewer Design,” 4th Edition, 1999, pp.201-204. These tables may reduce the minimum gauge due to a higherflexibility factor allowed for a trench condition.

MaximumCover, Feet

Size

Size MaximumCover, Feet

Heights-of-Cover

10

11

3" x 1" or 5" x 1" CorrugationInside Specified Galvanized Coated &

Diameter, Thickness & ALUMI- Full PAVED- SMOOTH- HEL-COR SmoothCorin. in. NIZED* Coated INVERT FLO CL54 0.064 50 66 84 138 197 58

0.079 61 77 95 149 207 670.109 83 100 118 171 2260.138 106 123 140 194 2450.168 129 146 163 217 264

60 0.064 55 73 93 153 218 640.079 67 86 105 165 229 740.109 92 110 130 190 2510.138 118 136 156 216 2720.168 143 161 181 241 293

66 0.064 60 80 102 168 240 700.079 74 94 116 181 252 810.109 101 121 143 208 2760.138 129 149 171 236 2990.168 157 177 199 264 322

72 0.064 66 88 111 183 262 770.079 81 102 126 197 275 890.109 110 132 156 227 3010.138 140 162 186 257 3260.168 171 193 217 288 351

78 0.064 71 95 121 198 830.079 87 111 137 214 298 960.109 119 143 169 246 3260.138 152 176 202 279 3530.168 185 209 235 312 380

84 0.064 77 102 130 213 890.079 94 119 147 230 321 1040.109 128 154 182 264 3510.138 164 189 217 300 3790.168 199 224 253 335 409

90 0.064 82 109 140 228 960.079 100 127 158 246 1110.109 137 164 195 283 376 1440.138 175 202 233 321 4060.168 213 240 271 359 438

96 0.064 87 116 149 242 1020.079 107 136 169 262 1180.109 147 176 209 302 401 1540.138 188 217 250 343 4330.168 228 257 290 383 467

102 0.064 93 124 158 258 1080.079 114 145 179 279 1260.109 155 186 220 320 426 1640.138 198 229 263 363 4600.168 241 272 306 406 496

108 0.079 120 153 188 295 1330.109 165 198 233 340 1730.138 211 244 279 386 4870.168 256 289 324 431 525

114 0.079 127 162 199 312 1410.109 174 209 246 359 1830.138 222 257 294 407 5140.168 271 306 343 456 554

120 0.109 183 220 259 378 1930.138 234 271 310 429 5410.168 284 321 360 479 583

126 0.138 247 285 326 452 (2) (2)132 0.138 259 299 342 474

0.168 314 354 397 529 (2) (2)

138 0.138 270 312 357 4950.168 328 370 415 553 (2) (2)

144 0.168 344 388 435 579 (2) (2)

1Weights for TRENCHCOAT polymer-coated pipe are 1% to 4% higher,varying by gauge.

2Please contact your CONTECH Sales Engineer.

Approximate Weight/Foot CONTECHCorrugated Steel Pipe(Estimated Average Weights—Not forSpecification Use)

1-1/2" x 1/4" CorrugationInside Specified

Diameter, Thickness, Galvanized & Fullin. in. ALUMINIZED Coated

6 0.052 4 50.064 5 6

8 0.052 5 60.064 6 7

10 0.052 6 70.064 7 8

2-2/3" x 1/2" CorrugationInside Specified Galvanized Coated &

Diameter, Thickness & ALUMI- Full PAVED- SMOOTH- HEL-COR SmoothCorin. in. NIZED1 Coated INVERT FLO CL12 0.052 8 10 13

0.064 10 12 150.079 12 14 17

15 0.052 10 13 16 260.064 12 15 18 280.079 15 18 21 31

18 0.052 12 16 19 310.064 15 19 22 34 170.079 18 22 25 37 20

21 0.052 14 18 23 360.064 17 21 26 39 210.079 21 25 30 43 24

24 0.052 15 20 26 410.064 19 24 30 45 650.079 24 29 35 50 69 230.109 33 38 44 59 77 26

30 0.052 20 26 32 510.064 24 30 36 55 820.079 30 36 42 60 87 290.109 41 47 53 72 96 34

36 0.052 24 31 39 500.064 29 36 44 65 98 350.079 36 43 51 75 104 410.109 49 56 64 90 1160.138 62 69 77 100 127

42 0.052 28 36 45 710.064 34 42 51 77 114 420.079 42 50 59 85 121 480.109 57 65 74 100 1350.138 72 80 89 115 149

48 0.064 38 48 57 85 128 460.079 48 58 67 95 138 530.109 65 75 84 112 1540.138 82 92 101 129 1700.168 100 110 119 147 186

54 0.079 54 65 76 105 156 520.109 73 84 95 124 173 590.138 92 103 114 143 1910.168 112 123 134 163 209

60 0.109 81 92 106 140 192 680.138 103 114 128 162 2120.168 124 135 149 183 232

66 0.109 89 101 117 160 211 960.138 113 125 141 180 2330.168 137 149 165 210 255

72 0.138 123 137 154 210 254 (2)0.168 149 163 180 236 278

78 0.168 161 177 194 260 302 (2)84 0.168 173 190 208 270 325 (2)


InstallationCorrugated Steel PipeEconomies in installation

Corrugated steel drainage structures from CONTECH canbe installed quickly and easily. The followingrecommendations are based on actual experiencescovering thousands of installations. While incomplete indetail, they serve to illustrate the relative simplicity withwhich corrugated steel structures can be installed.

Preparing the bedding

Corrugated steel structures can be installed successfully onlyon a properly prepared bedding. The bedding should offeruniform support to the pipe and help seat the corrugationsin the underlying soil. Frozen soil, sod, large rocks or othersimilar objects must be removed from the bed.

Placing the pipe

Corrugated metal pipe weighs much less than othercommonly used drainage structures. This is due to theefficient strength of the metal, further improved withcarefully designed and formed corrugations. Even theheaviest sections of CONTECH Pipe can be handled withrelatively light equipment compared with equipmentrequired for much heavier reinforced concrete pipe.

Backfilling

All suitable structural backfill materials will perform wellwith CONTECH Corrugated Steel Pipe and Pipe-Arches.However, backfill should be free of large stones, frozenlumps and other debris.

Backfill materials should be placed in layers about sixinches deep, deposited alternately on opposite sides of thepipe. Each layer should be compacted carefully. Selectbackfill is placed and compacted until minimum coverheight is reached, at which point, standard roadembankment backfill procedures are used.

Complete information

For more information, see ASTM A798, AASHTO Section26 and the Installation Manual of the National CorrugatedSteel Pipe Association.

12

Minimum Cover (feet)for Indicated Axle Loads (kips)

Construction Loads

For temporary construction vehicle loads, an extra amountof compacted cover may be required over the top of thepipe. The height-of-cover shall meet minimum requirementsshown in the table below. The use of heavy constructionequipment necessitates greater protection for the pipe thanfinished grade cover minimums for normal highway traffic.

General Guidelines for Minimum CoverPipe

Span,Inches 18-50 50-75 75-110 110-150

12-42 2.0 2.5 3.0 3.048-72 3.0 3.0 3.5 4.0

78-120 3.0 3.5 4.0 4.0126-144 3.5 4.0 4.5 4.5

Minimum cover may vary depending on local conditions. The contractormust provide the additional cover required to avoid damage to the pipe.Minimum cover is measured from the top of the pipe to the top of themaintained construction roadway surface.

Temporary Cover ForConstruction Loads Finished

GradeHeight-Of-Cover

Diameter Minimumor Span Cover

(In.) (In.) 18 16 14 12 10 8(5)

6 (4) 12 161 201 8 (4) 119 14910 (4) 98 12312 113 14215 94 11818 75 9421 65 8224 56 71 9927 63 8930 56 7936 47 66 8542 56 7348 12 49 63 7854 15 43 56 6960 15 50 6266 18 45 5672 18 45

15 17 x 13 16 12 13 2018 21 x 15 16 12 12 1921 24 x 18 16 12 11 1624 28 x 20 14 12 10 1630 35 x 24 14 12 9 1436 42 x 29 12 12 7 1342 49 x 33 12 15 6 1248 57 x 38 10 15 6 1254 64 x 43 10 18 6 1260 71 x 47 8(5) 18 6 12

2-2/3” X 1/2” Height-of-Cover Limits forCorrugated Aluminum Pipe

HS 20 Live Load

Maximum Cover, (Ft.)[2]

2-2/3” X 1/2” Height-of-Cover Limits forCorrugated Aluminum Pipe-Arch

HS 20 Live LoadMaximum Cover, (Ft.)Aluminum Pipe-Arch(2)Round

PipeDia.(In.)

Size, (In.)Span x

Rise

MinimumGauge

Minimum(3)

Cover(In.)

For The Following CornerBearing Pressures In Tons per Ft.

Notes1. Height of cover is measured from top of rigid pavement or to bottom of

flexible pavement.2. Maximum cover meets AASHTO design criteria.3. Minimum cover meets ASTM B 790 design criteria.4. 1 1/2” x 1/4” corrugation.5. 8-gauge pipe has limited availability.6. For construction loads, see Page 16.

Corrugated Aluminum Pipe

13

2 Tons 3 Tons

Equiv. Standard Gauge

Heights-of-Cover


Heights-of-Cover

54 60 x 46 14 15 13 2060 66 x 51 14 18 13 2066 73 x 55 14 21 16(5) 24(5)

72 81 x 59 12 21 14 22 78(4) 87 x 63 12 24 13 20 84(4) 95 x 67 12 24 12 18 90(4) 103 x 71 10 24 11 17 96(4) 112 x 75 8(6) 24 10 16

Notes1. Height of cover is measured from top of rigid pavement or to bottom of flexible

pavement.2. Maximum cover meets AASHTO design criteria.3. Minimum cover meets ASTM B 790 design criteria.4. Limited availability on these sizes.5. Non-linear values due to Rt/Rc ratio.6. 8-gauge pipe has limited availability.7. For construction loads, see Page 16.

3” x 1” Height-of-Cover Limits for CorrugatedAluminum Pipe

HS 20 Live Load

Diameter Minimum(3)

or Span Cover(In.) (In.) 16 14 12 10 8(6)

30 12 52 6536 43 5442 36 46 6548 12 32 40 57 7354 15 28 35 50 6560 15 25 32 45 58 7266 18 23 28 41 53 6572 18 21 26 37 48 5978 21 24 34 44 5584 21 31 41 5190 24 29 38 4796 24 27 36 44

102 24 33 41108 24 31 39114 24 37120 24 35

Equiv. Standard GaugeMaximum Cover, (Ft.)[2]

3” x 1” Height-of-Cover Limits for CorrugatedAluminum Pipe

HS 20 Live Load

RoundPipeDia.(In.)

Size, (In.)Span x

Rise

MinimumGauge

Minimum(3)

Cover(In.)

Maximum Cover, (Ft.)Aluminum Pipe-Arch(2)

For The Following CornerBearing Pressures In Tons per Ft.

2 Tons 3 Tons

Corrugated Aluminum Pipe

14

Approximate Weight/Foot CONTECHCorrugated Aluminum Pipe

(Estimated Average Weights—Not forSpecification Use)

Weight (Lb./Lineal Ft.)

Equiv. Standard Gauge

2 2/3” x 1/2” Corrugation Aluminum Pipe

Diameteror Span

(In.) (.048”) (.060”) (.075”) (.105”) (.135”) (.164”)18 16 14 12 10 8(3)

6 (2) 1.3 1.6 8 (2) 1.7 2.110 (2) 2.1 2.612 3.2 4.015 4.0 4.918 4.8 5.921 5.6 6.924 6.3 7.9 10.827 8.8 12.230 9.8 13.536 11.8 16.3 20.742 19.0 24.248 21.7 27.6 33.554 24.4 31.1 37.760 34.6 41.966 46.072 50.1

Weight (Lb./Lineal Ft.)Equiv. Standard Gauge

3” x 1” Corrugation Aluminum Pipe

Diameteror Span

(In.) (.060”) (.075”) (.105”) (.135”) (.164”)16 14 12 10 8(3)

30 9.3 11.536 11.1 13.742 12.9 16.0 22.048 14.7 18.2 25.1 32.054 16.5 20.5 28.2 35.960 18.3 22.7 31.3 40.0 48.366 20.2 24.9 34.3 43.7 53.072 22.0 27.1 37.4 47.6 57.878 29.3 40.4 51.5 62.584 43.5 55.4 67.290 46.6 59.3 71.996 49.6 63.2 76.7

102 66.6 80.8108 71.0 86.1114 90.9120 95.6

Notes1. Helical lockseam pipe only. Annular riveted pipe weights will be higher.2. 1 1/2” x 1/4” Corrugation.3. 8-gauge pipe has limited availability.

15


InstallationCorrugated Aluminum PipeRequired elements

Satisfactory site preparation, trench excavation, bedding,and backfill operations are essential to develop the strengthof any flexible conduit. In order to obtain proper strengthwhile preventing settlement, it is necessary that the soilenvelope around the pipe be of good granular material,properly placed, and carefully compacted.

A qualified engineer should be engaged to design a properfoundation, adequate bedding, and backfill. (Reference:ASTM B788).

Trench excavation

If the adjacent embankment material is structurallyadequate, the trench requires only a bottom clear width ofthe pipe’s span, plus sufficient room for compactionequipment.

Bedding

Bedding preparation is critical to both pipe performanceand service life. The bed should be constructed to uniformline and grade to avoid distortions that may createundesirable stresses in the pipe and/or rapid deteriorationof the roadway. The bed should be free of rock formations,protruding stones, frozen lumps, roots and other foreignmatter that may cause unequal settlement.

It is recommended that the bedding be a stable, well graded,

granular material. Placing the pipe on the bedding surface isgenerally accomplished by one of two methods to ensure

satisfactory compaction in the haunch area. One method is shaping

the bedding surface to conform to the lower section of the pipe.The other is carefully tamping a granular or select material in the

haunch area to achieve a well-compacted condition.

Backfill

Satisfactory backfill material, proper placement andcompaction are key factors in obtaining maximum strengthand stability.

The backfill material should be free of rocks, frozen lumps and

foreign matter that could cause hard spots or decompose to create

voids. Backfill material should be a well graded, granular materialthat meets the requirements of AASHTO M145. Backfill should be

placed symmetrically on each side of the pipe in six-inch to eight-

inch loose lifts. Each lift is to be compacted to a minimum of 90percent density per AASHTO T180.

A high percent of silt or fine sand in the native soils suggests the

need for a well graded, granular backfill material to prevent soil

migration, or a geotextile separator can be used.

During backfill, only small tracked vehicles (D-4 or smaller)should be near the pipe as fill progresses above the topand to finished grade. The engineer and contractor arecautioned that the minimum cover may need to beincreased to handle temporary construction vehicle loads(larger than a D-4). Refer to Heavy construction loads below.

Salt water installation

In salt water installations, the bedding and backfill aroundthe pipe must be clean granular material. If the backfill issubject to possible infiltration by the adjacent native soil,the clean granular backfill should be wrapped in a geotextile.

Pavement

For minimum cover applications, CONTECH recommendsthat a properly designed flexible or rigid pavement beprovided to distribute level loads and maintain cover heights.

Heavy construction loads

For temporary construction vehicle loads, an extraamount of compacted cover may be required over thetop of the pipe. The height-of-cover shall meet the minimumrequirements shown in the Table below. The use of heavyconstruction equipment necessitates greater protection forthe pipe than finished grade cover minimums for normalhighway traffic.

Height of Cover

Temporary CoverFor ConstructionLoads

FinishedGrade

Min. Height-of-Cover Requirements for Construction Loads OnCorrugated Aluminum Pipe

Diameter/Span

(Inches) 18-50 50-75 75-110 110-150Aluminum

12-42 3.0’ 3.5’ 4.0’ 4.0’48-72 4.0’ 4.0’ 5.0’ 5.5’

78-120 4.0’ 5.0’ 5.5’ 5.5’

Axle Load (Kips)

16

Heights of Cover

ULTRA-FLO®

17

Table 1ALUMINIZED STEEL Type 2 or Galvanized Steel ULTRA FLOHS 20 Live Load

Diameter(Inches) (0.064”) (0.079”) (0.109”)

16 14 1218 1.0/6821 1.0/5824 1.0/5130 1.0/4136 1.0/34 1.0/4842 1.0/29 1.0/41 1.0/6948 1.0/25 1.0/36 1.0/6054 1.25/22 1.25/32 1.0/5360 1.25/20* 1.25/28 1.0/4866 1.5/26 1.25/4472 1.5/24* 1.25/4078 1.75/22* 1.5/3784 1.75/3490 2.0/32*96 2.0/30*

102 2.5/28*

Minimum/Maximum Cover (Feet) Specified Thickness and Gauge

Table 2ALUMINIZED STEEL Type 2 or Galvanized Steel ULTRA FLOPipe-Arch HS 20 Live Load

Equiv.Pipe Span RiseDia. (In.) (In.) (0.064”) (0.079”) (0.109”)(In.) 16 14 1218 20 16 1.0/1521 23 19 1.0/1524 27 21 1.0/1530 33 26 1.0/15 1.0/1536 40 31 1.0/15 1.0/1542 46 36 M.L.8 M.L.8 1.0/1548 53 41 M.L.8 M.L.8 1.0/1554 60 46 M.L.8 M.L.8 1.0/1560 66 51 M.L.8 M.L.8 1.25/15


NOTES (Tables 1, 2, 3, and 4)1. Allowable minimum cover is measured from top of pipe to bottom of

flexible pavement or top of pipe to top of rigid pavement. Minimumcover in unpaved areas must be maintained.

2. All heights of cover are based on trench conditions. If embankmentconditions exist, there may be restrictions on gages for the largediameters. Your CONTECH Sales Engineer can provide further guidancefor a project in embankment conditions.

3. Tables 1, 2, 3 and 4 are for HS-20 loading only. For heavy constructionloads, higher minimum compacted cover may be needed. See Page 19.

4. All steel ULTRA FLO is installed in accordance with ASTM A798“Installing Factory-Made Corrugated Steel Pipe for Sewers and OtherApplications.”

5. Heights of cover are for 3/4” x 3/4” x 7-1/2” external rib corrugation.

*These sizes and gage combinations are installed in accordancewith ASTM A796 paragraphs 17.2.3 and ASTM A798. Foraluminum ULTRA FLO refer to ASTM B790 and B788.

Table 3Aluminum ULTRA FLO HS 20 Live Load

Diameter(Inches) (0.060”) (0.075”) (0.105”) (0.135”)

16 14 12 1018 1.0/5521 1.0/4724 1.0/41 1.0/5730 1.25/33 1.0/45 1.0/7336 1.5/27 1.25/38 1.0/61 1.0/8642 1.75/23* 1.5/32 1.25/52 1.0/7448 2.0/28* 1.5/46 1.25/6554 2.0/25* 1.75/40 1.25/5760 2.0/36* 1.5/5266 2.0/33* 1.75/4772 2.25/30* 2.0/4378 2.5/39*84 2.5/34*


Table 4Aluminum ULTRA FLO Pipe-Arch HS 20 Live Load

Equiv.Pipe Span RiseDia (In.) (In.) (0.060”) (0.075”) (0.105”) (0.135”)(In.) 16 14 12 1018 20 16 1.0/1521 23 19 1.0/1524 27 21 1.25/15 1.0/1530 33 26 1.50/15 1.25/15 1.0/1536 40 31 1.75/15 1.50/15 1.25/15 1.0/1542 46 36 1.50/15 1.25/1548 53 41 1.75/15 1.25/1554 60 46 2.0/15 1.50/1560 66 51 2.0/15 1.75/15


NOTES (Tables 2 and 4 only)6. The foundation in the corners should allow for 4,000 psf corner bearing

pressure.7. Larger size pipe-arches may be available on special order.8. M.L. (Heavier gage is required to prevent crimping at the haunches.)


Table 1Handling Weight for ALUMINIZED STEEL Type 2 or Galvanized SteelULTRA FLO

Diameter(Inches) (0.064”) (0.079”) (0.109”)

16 14 12

18 1521 1824 2030 2536 30 3742 35 43 5948 40 49 6754 45 55 7560 50 61 8366 67 9272 73 10078 80 10884 11690 12596 133

102 140

Table 2Handling Weight for ALUMINUM ULTRA FLO

Diameter(Inches) (0.060”) (0.075”) (0.105”) (0.135”)

16 14 12 10

18 521 624 7 930 9 11 1536 11 13 18 2342 12 15 21 2648 17 24 3054 19 27 3460 30 3766 33 4172 36 4578 4984 52

Approximate Weight/Foot CONTECH ULTRA-FLO Pipe

Reduced excavation because of ULTRAFLO’s smaller outside diameter.

ULTRA FLO is available in long lengths.And, its light weight allows it to be unloaded

and handled with small equipment.

18

Weight (Pounds/Lineal Foot)

Specified Thickness and Gage

Weight (Pounds/Lineal Foot)Specified Thickness and Gage

Construction Loads

For temporary construction vehicle loads, an extra amountof compacted cover may be required over the top of thepipe. The use of heavy construction equipment necessitatesgreater protection for the pipe than finished grade coverminimums for normal highway traffic. The contractor mustprovide the additional cover required to avoid damagingthe pipe. Minimum cover is measured from the top of thepipe to the top of the maintained roadway surface.

InstallationULTRA-FLOOverview

Millions of feet of ULTRA-FLO have been installed in avariety of storm sewer projects across the U. S. Like all pipeproducts, proper installation is important for long-termperformance. The installation of ULTRA-FLO is similar tostandard corrugated steel pipe in a trench condition. YourCONTECH Sales Engineer will be glad to assist you if youhave any questions.

Bedding and Backfill

Typical ULTRA-FLO installation requirements are the sameas for any other corrugated metal pipe installed in a trench.Bedding and backfill materials for steel Ultra Flo follow therequirements of the CSP installation specification ASTMA798; and must be free from stones, frozen lumps or otherdebris. For Aluminum Ultra Flow see ASTM A790. WhenASTM A796 or A788 designs are to be followed forcondition III requirements, indicated by asterisk (*) in thetables on page 17, use clean, easily compacted granularbackfill materials

Embankment Conditions

ULTRA-FLO is a superior CMP storm sewer product that isnormally installed in a trench condition. In those unusualembankment installation conditions, pipe sizes and gagesmay be restricted. Your CONTECH Sales Engineer canprovide you with further guidance.

19

Heavy Construction Loads Minimum Height of CoverRequirements for Construction Loads on ULTRA FLO Pipe

Diameter/Span(Inches) >32≤50 50≤75 75≤110 110≤150

15-42 2.0 ft. 2.5 ft. 3.0 ft. 3.0 ft.48-72 3.0 ft. 3.0 ft. 3.5 ft. 4.0 ft.

78-108 3.0 ft. 3.5 ft. 4.0 ft. 4.5 ft.

15-42 2.5 ft. 3.0 ft. 3.5 ft. 3.5 ft.

Axle Load (Kips)

Aluminum 3/4” x 3/4” x 7-1/2”

Steel 3/4” x 3/4” x 7-1/2”

Relining and RehabilitationRestoration of failed or deteriorating pipe can beaccomplished by relining with ULTRA-FLO. Its low-wallprofile may yield an inside diameter that approaches theoriginal pipe, while the hydraulic capacity is improved.

ULTRA-FLO’s light weight makes the lining process easierand can be provided in various lengths to meet individualsite conditions.


BRO-DRAIN-PROD 11/03 12M

©2003 CONTECH CONSTRUCTION PRODUCTS INC.All rights reserved. Printed in USA.

Site Development SolutionsInnovative Civil Engineering Solutions is the hallmark ofCONTECH’s nationwide team of Sales Engineer. Combined withour wide variety of site development products we can solve mostcivil engineering problems. Innovative applications for stormwaterdetention systems, stormwater treatment, storm drainage, sewagelines, bridges, tunnels, retaining walls and erosion control begin atCONTECH.

HEL-COR® Corrugated Steel Pipe and CORLIX® CorrugatedAluminum Pipe … Designed for drainage culverts, storm sewers,stream enclosures and underground conduits for highway, railway,industrial and municipal applications. Provided in a varietyof linings and coatings to meet specific durability andhydraulic requirements.

HEL-COR CL Pipe … Concrete-lined for top-flow capacity plusproven strength of corrugated steel design.

End Sections … An end finish for culverts and sewer outfalls, eitherpipe or pipe-arch structures in steel or aluminum.

ULTRA FLO® Storm Sewer Pipe … Offers improved hydrauliccapacity and lightweight for storm sewers.

Slotted Drain® … An efficient system for highways, parking lots, orother surface drainage involving only narrow slots on the surface.

Vortechs® Stormwater Treatment System ... Efficiently removescontaminated sediment, floating hydrocarbons, and debris fromsurface runoff.

Perforated Pipe … Subdrainage applications for airports,highways and railroads. Available in metal and plastic pipe.

HEL-COR Pile Shell … For foundations under buildingsand bridges.

MULTI-PLATE Pipe, Pipe-Arch and Arch … Use for bridges, streamenclosures and storm sewers.

SUPER-SPAN™ Structures … Economically and aestheticallyadvantageous for new and replacement bridges.

BEBO® Concrete Arch Systems ... The pre-engineered BEBOConcrete Arch System is a combination of cast-in-place concretefootings, precast arch elements, spandrel and wingwalls.

Box Culverts … Provides maximum water flow under minimumheadroom. Aluminum’s light weight means easier installation.

Steel Vehicular Bridges … Steadfast’s steel vehicular bridgesprovide a clear-span up to 150 feet, reducing site preparation timeand eliminating costly piers. They meet skewed alignments, aroadway width of up to 40 feet, AASHTO HS-20 and HS-25demands or the heavier loads required by the mining industry.

Keystone Retaining Walls ... Aesthetically pleasing high-strength,low-absorption concrete walls that can be used for projects up to60 feet in height.

Bin-Type Retaining Walls … Use for unstable slopes, limited right-of-way, shore and bank protection.

Liner Plate … Designed for constructing new utility tunnels andrelining structures under existing highways and railroads.

Bridge Plank … Ideal for reflooring bridges and for newbridge construction.

Metric Sheeting … Use for trenches, cofferdams, shore protectionand cutoff walls.

A-2000™ PVC Pipe … High-strength construction and smoothinterior for sanitary collector sewers and storm sewers. MeetsASTM F 949.

A-2026™ PVC Sanitary Pipe … First small diameter PVC profile-wall pipe with 115 PSI pipe stiffness, which means it’s three timesstronger than SDR 35.

A2 Liner Pipe™… Smooth interior for sliplining storm andsanitary sewers.

ABS and PVC TRUSS PIPE® … Combines strength, stiffness, jointintegrity and economy for gravity-flow sanitary sewers. MeetsASTM D 2680.

Geosynthetics … TENSAR® Geogrids for soil reinforcement, basestabilization, slope reinforcement and retaining walls. � CONTECHWoven and Nonwoven Geotextiles for drainage, separation,filtration and stabilization. � STRIPDRAIN for highway edge drainsand building foundation drainage. � CONTECH high-performanceturf reinforcement mats; permanent and temporary mats andblankets; and, hard armor for rivers, channels and shorelines forerosion control. � PavePrep® for retarding reflective cracking inpavements.

For more information, call 1-800-338-1122, one ofCONTECH’s Regional Offices located in the following cities:

California (San Bernadino) 909-885-8800Colorado (Denver) 303-431-8999Florida (Tampa) 727-544-8811Georgia (Atlanta) 770-409-0814Indiana (Indianapolis) 317-842-7766Kansas (Kansas City) 913-906-9200Maryland (Columbia) 410-740-8490Ohio (Middletown) 513-425-5430North Carolina (Raleigh) 919-858-7820Texas (Dallas) 972-659-0828

Visit our web site: www.contech-cpi.com

NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS AN EXPRESSEDWARRANTY OR AN IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FORANY PARTICULAR PURPOSE. SEE CONTECH’S STANDARD QUOTATION ORACKNOWLEDGEMENT FOR APPLICABLE WARRANTIES AND OTHER TERMS ANDCONDITIONS OF SALE.

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