ASTM C76-15
(Specification)Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe
Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe
ABSTRACT
This specification covers reinforced concrete culvert, storm drain, and sewer pipe. The pipe manufactured with this specification shall be of five classes: Class I, Class II, Class III, Class IV, and Class V. The strength requirements for each class are specified. The reinforced concrete shall consists of: cementitious materials, mineral aggregates, and water. Cementitious materials are the following: cement, ground granulated blast-furnace slag, fly ash, and allowable combinations of cementitious materials. Other materials include: admixtures and blends, steel reinforcement, and synthetic fibers. Design tables and modified of special designs are given. Reinforcements are the following: circumferential reinforcement, longitudinal reinforcement, and joint reinforcement for rubber and non-rubber gasket joints. The physical properties shall conform to the required test for external load crushing strength. The following concrete tests shall be done: compression testing of cylinders, compression testing of cores, absorption test, and equipment test.
SCOPE
1.1 This specification covers reinforced concrete pipe intended to be used for the conveyance of sewage, industrial wastes, and storm water, and for the construction of culverts.
1.2 This specification is the inch-pound companion to Specification C76M; therefore, no SI equivalents are presented in this specification. Reinforced concrete pipe that conform to the requirements of C76M, are acceptable under this Specification C76 unless prohibited by the Owner.
Note 1: This specification is a manufacturing and purchase specification only, and does not include requirements for bedding, backfill, or the relationship between field load condition and the strength classification of pipe. However, experience has shown that the successful performance of this product depends upon the proper selection of the class of pipe, type of bedding and backfill, and care that installation conforms to the construction specifications. The owner of the reinforced concrete pipe specified herein is cautioned that he must correlate the field requirements with the class of pipe specified and provide inspection at the construction site.
Note 2: Attention is called to the specification for reinforced concrete D-load culvert, storm drain, and sewer pipe (Specification C655).
General Information
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Designation:C76 −15
StandardSpecification for
Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe
This standard is issued under the fixed designation C76; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Drain, and Sewer Pipe (Metric)
C150 Specification for Portland Cement
1.1 This specification covers reinforced concrete pipe in-
C260 Specification for Air-Entraining Admixtures for Con-
tended to be used for the conveyance of sewage, industrial
crete
wastes, and storm water, and for the construction of culverts.
C309 Specification for Liquid Membrane-Forming Com-
1.2 This specification is the inch-pound companion to
pounds for Curing Concrete
Specification C76M; therefore, no SI equivalents are presented
C494/C494M Specification for Chemical Admixtures for
in this specification. Reinforced concrete pipe that conform to
Concrete
the requirements of C76M, are acceptable under this Specifi-
C497 Test Methods for Concrete Pipe, Manhole Sections, or
cation C76 unless prohibited by the Owner.
Tile
C595 Specification for Blended Hydraulic Cements
NOTE 1—This specification is a manufacturing and purchase specifica-
tion only, and does not include requirements for bedding, backfill, or the C618 Specification for Coal Fly Ash and Raw or Calcined
relationship between field load condition and the strength classification of
Natural Pozzolan for Use in Concrete
pipe. However, experience has shown that the successful performance of
C655 Specification for Reinforced Concrete D-Load
this product depends upon the proper selection of the class of pipe, type
Culvert, Storm Drain, and Sewer Pipe
of bedding and backfill, and care that installation conforms to the
C822 Terminology Relating to Concrete Pipe and Related
construction specifications. The owner of the reinforced concrete pipe
specified herein is cautioned that he must correlate the field requirements
Products
with the class of pipe specified and provide inspection at the construction
C989 Specification for Slag Cement for Use in Concrete and
site.
Mortars
NOTE 2—Attention is called to the specification for reinforced concrete
C1017/C1017M Specification for Chemical Admixtures for
D-load culvert, storm drain, and sewer pipe (Specification C655).
Use in Producing Flowing Concrete
2. Referenced Documents
C1116 Specification for Fiber-Reinforced Concrete and
2 Shotcrete
2.1 ASTM Standards:
C1602/C1602M Specification for Mixing Water Used in the
A36/A36M Specification for Carbon Structural Steel
Production of Hydraulic Cement Concrete
A615/A615M SpecificationforDeformedandPlainCarbon-
Steel Bars for Concrete Reinforcement
3. Terminology
A706/A706M Specification for Deformed and Plain Low-
3.1 Definitions—For definitions of terms relating to con-
Alloy Steel Bars for Concrete Reinforcement
crete pipe, see Terminology C822.
A1064/A1064M Specification for Carbon-Steel Wire and
Welded Wire Reinforcement, Plain and Deformed, for
4. Classification
Concrete
4.1 Pipe manufactured in accordance with this specification
C33 Specification for Concrete Aggregates
shall be of five classes identified as Class I, Class II, Class III,
C76M Specification for Reinforced Concrete Culvert, Storm
Class IV, and Class V. The corresponding strength require-
ments are prescribed in Tables 1-5.
This specification is under the jurisdiction of ASTM Committee C13 on
5. Basis of Acceptance
Concrete Pipe and is the direct responsibility of Subcommittee C13.02 on
Reinforced Sewer and Culvert Pipe.
5.1 Unlessotherwisedesignatedbytheowneratthetimeof,
Current edition approved Jan. 1, 2015. Published January 2015. Originally
or before placing an order, there are two separate and alterna-
approved in 1930. Last previous edition approved in 2014 as C76 – 14. DOI:
10.1520/C0076-15.
tive bases of acceptance. Independent of the method of
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
acceptance, the pipe shall be designed to meet both the 0.01-in.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
crack and ultimate strength requirements specified in Tables
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 1-5.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C76−15
A
TABLE 1 Design Requirements for Class I Reinforced Concrete Pipe
NOTE 1—See Section 5 for basis of acceptance specified by the owner. The strength test requirements in pounds-force per linear foot of pipe under
the three-edge-bearing method shall be either the D-load (test load expressed in pounds-force per linear foot per foot of diameter) to produce a 0.01-in.
crack, or the D-loads to produce the 0.01-in. crack and the ultimate load as specified below, multiplied by the internal diameter of the pipe in feet.
D-load to produce a 0.01-in. crack 800
D-load to produce the ultimate load 1200
Reinforcement, in. /linear ft of pipe wall
Wall A Wall B
Internal
Concrete Strength, 4000 psi Concrete Strength, 4000 psi
Designated
Circular Circular
Diameter,
Wall B Wall B
Reinforcement Reinforcement
in.
Elliptical Elliptical
Thickness, Thickness,
C C
Reinforcement Reinforcement
Inner Outer Inner Outer
in. in.
Cage Cage Cage Cage
60 5 0.24 0.15 0.27 6 0.21 0.12 0.23
1 1
66 5 ⁄2 0.30 0.18 0.33 6 ⁄2 0.24 0.15 0.27
72 6 0.35 0.21 0.39 7 0.29 0.17 0.32
1 1
78 6 ⁄2 0.40 0.24 0.44 7 ⁄2 0.32 0.19 0.36
84 7 0.45 0.27 0.50 8 0.36 0.21 0.41
1 1
90 7 ⁄2 0.49 0.29 0.54 8 ⁄2 0.41 0.24 0.45
96 8 0.54 0.32 0.60 9 0.45 0.27 0.51
Concrete Strength, 5000 psi
1 1
102 8 ⁄2 0.63 0.38 Inner Circular 0.24 9 ⁄2 0.54 0.32 Inner Circular 0.21
Plus Elliptical 0.38 Plus Elliptical 0.32
108 9 0.68 0.41 Inner Circular 0.27 10 0.60 0.36 Inner Circular 0.24
Plus Elliptical 0.41 Plus Elliptical 0.36
A A
114 . . . . . . . .
A A
120 . . . . . . . .
A A
126 . . . . . . . .
A A
132 . . . . . . . .
A A
138 . . . . . . . .
A A
144 . . . . . . . .
A
For modified or special designs see 7.2 or with the permission of the owner utilize the provisions of Specification C655. Steel areas may be interpolated between those
shown for variations in diameter, loading, or wall thickness. Pipe over 96 in. in diameter shall have two circular cages or an inner circular plus one elliptical cage.
B
As an alternative to designs requiring both inner and outer circular cages the reinforcement may be positioned and proportioned in either of the following manners:
An inner circular cage plus an elliptical cage such that the area of the elliptical cage shall not be less than that specified for the outer cage in the table and the total area
of the inner circular cage plus the elliptical cage shall not be less than that specified for the inner cage in the table,
An inner and outer cage plus quadrant mats in accordance with Fig. 1,or
An inner and outer cage plus an elliptical cage in accordance with Fig. 2.
C
Elliptical and quadrant steel must be held in place by means of holding rods, chairs, or other positive means throughout the entire casting operation.
5.1.1 Acceptance on the Basis of Plant Load-Bearing Tests, 5.2 Age for Acceptance—Pipe shall be considered ready for
Material Tests, and Inspection of Manufactured Pipe for Visual acceptance when it conforms to the requirements as indicated
Defects and Imperfections—Acceptability of the pipe in all
by the specified tests.
diameters and classes produced in accordance with 7.1 or 7.2
shall be determined by the results of the three-edge bearing
6. Materials
tests as defined in 11.3.1; by such material tests as are required
6.1 The aggregate shall be so sized, graded, proportioned,
in 6.2, 6.3, 6.5, and 6.6; by an absorption test of the concrete
and mixed with such proportions of Portland cement, blended
from the wall of the pipe as required in 11.9; and by visual
hydraulic cement, or Portland cement and supplementary
inspection of the finished pipe to determine its conformance
cementing materials, or admixtures, if used, or a combination
with the accepted design and its freedom from defects.
thereof, and water to produce a homogenous concrete mixture
5.1.2 Acceptance on the Basis of Material Tests and Inspec-
tion of Manufactured Pipe for Defects and Imperfections— of such quality that the pipe will conform to the test and design
requirementsofthespecification.Innocase,however,shallthe
Acceptability of the pipe in all diameters and classes produced
in accordance with 7.1 or 7.2 shall be determined by the results proportion of Portland cement, blended hydraulic cement, or a
of such material tests as are required in 6.2, 6.3, 6.5, and 6.6; combination of Portland cement and supplementary cementing
bycrushingtestsonconcretecoresorcuredconcretecylinders;
materials be less than 470 lb/yd .
by an absorption test of the concrete from the wall of the pipe
6.2 Cementitious materials:
for each mix design that is used on an order; and by inspection
6.2.1 Cement—Cementshallconformtotherequirementsof
of the finished pipe including amount and placement of
Specification C150, or shall be portland blast-furnace slag
reinforcement to determine its conformance with the accepted
cement, or slag modified portland cement, or portland-
design and its freedom from defects.
pozzolan cement conforming to the requirements of Specifica-
5.1.3 When agreed upon by the owner and manufacturer,
tion C595, except that the pozzolan constituent in the Type IP
any portion or any combination of the tests itemized in 5.1.1 or
5.1.2 may form the basis of acceptance. portland-pozzolan cement shall be fly ash.
C76−15
A
TABLE 2 Design Requirements for Class II Reinforced Concrete Pipe
NOTE 1—See Section 5 for basis of acceptance specified by the owner. The strength test requirements in pounds-force per linear foot of pipe under
the three-edge-bearing method shall be either the D-load (test load expressed in pounds-force per linear foot per foot of diameter) to produce a 0.01-in.
crack, or the D-loads to produce the 0.01-in. crack and the ultimate load as specified below, multiplied by the internal diameter of the pipe in feet.
D-load to produce a 0.01-in. crack 1000
D-load to produce the ultimate load 1500
Reinforcement, in. /linear ft of pipe wall
Wall A Wall B Wall C
Internal
Desig- Concrete Strength, 4000 psi Concrete Strength, 4000 psi Concrete Strength, 4000 psi
nated
Circular Circular Circular
Wall Wall Wall
Diameter, C C C
Reinforcement Reinforcement Reinforcement
Thick- Elliptical Thick- Elliptical Thick- Elliptical
in.
D D D
ness, Reinforcement ness, Reinforcement ness, Reinforcement
Inner Outer Inner Outer Inner Outer
in. in. in.
Cage Cage Cage Cage Cage Cage
B B B
3 3
12 1 ⁄4 0.07 . . 2 0.07 . . 2 ⁄4 0.07 . .
7 B 1 B B
15 1 ⁄8 0.07 . . 2 ⁄4 0.07 . . 3 0.07 . .
B B B B B B
1 1
18 2 0.07 . . . 0.07 2 ⁄2 0.07 . . . 0.07 3 ⁄4 0.07 . . . 0.07
B B B B
1 3 1
21 2 ⁄4 0.12 . . . 0.10 2 ⁄4 0.07 . . . 0.07 3 ⁄2 0.07 . . . 0.07
B B B B
1 3
24 2 ⁄2 0.12 . . . 0.11 3 0.07 . . . 0.07 3 ⁄4 0.07 . . . 0.07
B B
5 1
27 2 ⁄8 0.15 . . . 0.12 3 ⁄4 0.12 . . . 0.11 4 0.07 . . . 0.07
B B
3 1 1
30 2 ⁄4 0.15 . . . 0.14 3 ⁄2 0.14 . . . 0.12 4 ⁄4 0.07 . . . 0.07
B B
7 3 1
33 2 ⁄8 0.16 . . . 0.15 3 ⁄4 0.15 . . . 0.12 4 ⁄2 0.07 . . . 0.07
E 3 E
36 3 0.14 0.08 0.15 4 0.12 0.07 0.12 4 ⁄4 0.07 0.07 0.08
1 1 1
42 3 ⁄2 0.16 0.10 0.18 4 ⁄2 0.15 0.09 0.17 5 ⁄4 0.10 0.07 0.11
48 4 0.21 0.12 0.23 5 0.18 0.11 0.20 5 ⁄4 0.14 0.08 0.15
1 1 1
54 4 ⁄2 0.24 0.15 0.27 5 ⁄2 0.21 0.12 0.24 6 ⁄4 0.17 0.10 0.19
60 5 0.30 0.18 0.33 6 0.24 0.15 0.27 6 ⁄4 0.21 0.12 0.24
1 1 1
66 5 ⁄2 0.35 0.21 0.39 6 ⁄2 0.31 0.19 0.34 7 ⁄4 0.24 0.15 0.27
72 6 0.41 0.24 0.45 7 0.35 0.21 0.39 7 ⁄4 0.30 0.18 0.33
1 1 1
78 6 ⁄2 0.45 0.27 0.51 7 ⁄2 0.40 0.24 0.44 8 ⁄4 0.35 0.21 0.39
84 7 0.51 0.31 0.57 8 0.45 0.27 0.51 8 ⁄4 0.41 0.24 0.45
1 1 1
90 7 ⁄2 0.57 0.34 0.63 8 ⁄2 0.51 0.31 0.57 9 ⁄4 0.48 0.29 0.53
96 8 0.62 0.36 0.69 9 0.57 0.34 0.63 9 ⁄4 0.55 0.33 0.60
Concrete Strength, 5000 psi
1 1 1
102 8 ⁄2 0.76 0.45 Inner 0.30 9 ⁄2 0.68 0.41 Inner 0.27 10 ⁄4 0.62 0.36 Inner 0.24
Circular Circular Circular
Plus El- 0.45 Plus El- 0.41 Plus El- 0.36
liptical liptical liptical
108 9 0.85 0.51 Inner 0.34 10 0.76 0.45 Inner 0.30 10 ⁄4 0.70 0.42 Inner 0.27
Circular Circular Circular
Plus El- 0.51 Plus El- 0.45 Plus El- 0.42
liptical liptical liptical
A A A
114 . . . . . . . . . . . .
A A A
120 . . . . . . . . . . . .
A A A
126 . . . . . . . . . . . .
A A A
132 . . . . . . . . . . . .
A A A
138 . . . . . . . . . . . .
A A A
144 . . . . . . . . . . . .
A
For modified or special designs see 7.2 or with the permission of the owner utilize the provisions of Specification C655. Steel areas may be interpolated between those
shown for variations in diameter, loading, or wall thickness. Pipe over 96 in. in diameter shall have two circular cages or an inner circular plus one elliptical cage.
B
For these classes and sizes, the minimum practical steel reinforcement is specified. The specified ultimate strength of non-reinforced pipe is greater than the minimum
specified strength for the equivalent diameters.
C
As an alternative to designs requiring both inner and outer circular cages the reinforcement may be positioned and proportioned in either of the following manners:
An inner circular cage plus an elliptical cage such that the area of the elliptical cage shall not be less than that specified for the outer cage in the table and the total area
of the inner circular cage plus the elliptical cage shall not be less than that specified for the inner cage in the table,
An inner and outer cage plus quadrant mats in accordance with Fig. 1,or
An inner and outer cage plus an elliptical cage in accordance with Fig. 2.
D
Elliptical and quadrant steel must be held in place by means of holding rods, chairs, or other positive means throughout the entire casting operation.
E
As an alternative, single cage reinforcement may be used. The reinforcement area in square in. per linear foot shall be 0.20 for wall B and 0.16 for wall C.
6.2.2 Ground Granulated Blast-Furnace Slag (GGBFS)— 6.2.4.2 Portland blast furnace slag cement only,
GGBFS shall conform to the requirements of Grade 100 or 120 6.2.4.3 Portland pozzolan cement onl
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C76 − 14 C76 − 15
Standard Specification for
Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe
This standard is issued under the fixed designation C76; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This specification covers reinforced concrete pipe intended to be used for the conveyance of sewage, industrial wastes, and
storm water, and for the construction of culverts.
1.2 This specification is the inch-pound companion to Specification C76M; therefore, no SI equivalents are presented in this
specification. Reinforced concrete pipe that conform to the requirements of C76M, are acceptable under this Specification C76
unless prohibited by the Owner.
NOTE 1—This specification is a manufacturing and purchase specification only, and does not include requirements for bedding, backfill, or the
relationship between field load condition and the strength classification of pipe. However, experience has shown that the successful performance of this
product depends upon the proper selection of the class of pipe, type of bedding and backfill, and care that installation conforms to the construction
specifications. The owner of the reinforced concrete pipe specified herein is cautioned that he must correlate the field requirements with the class of pipe
specified and provide inspection at the construction site.
NOTE 2—Attention is called to the specification for reinforced concrete D-load culvert, storm drain, and sewer pipe (Specification C655).
2. Referenced Documents
2.1 ASTM Standards:
A36/A36M Specification for Carbon Structural Steel
A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement
A706/A706M Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement
A1064/A1064M Specification for Carbon-Steel Wire and Welded Wire Reinforcement, Plain and Deformed, for Concrete
C33 Specification for Concrete Aggregates
C76M Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe (Metric)
C150 Specification for Portland Cement
C260 Specification for Air-Entraining Admixtures for Concrete
C309 Specification for Liquid Membrane-Forming Compounds for Curing Concrete
C494/C494M Specification for Chemical Admixtures for Concrete
C497 Test Methods for Concrete Pipe, Manhole Sections, or Tile
C595 Specification for Blended Hydraulic Cements
C618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
C655 Specification for Reinforced Concrete D-Load Culvert, Storm Drain, and Sewer Pipe
C822 Terminology Relating to Concrete Pipe and Related Products
C989 Specification for Slag Cement for Use in Concrete and Mortars
C1017/C1017M Specification for Chemical Admixtures for Use in Producing Flowing Concrete
C1116 Specification for Fiber-Reinforced Concrete and Shotcrete
C1602/C1602M Specification for Mixing Water Used in the Production of Hydraulic Cement Concrete
3. Terminology
3.1 Definitions—For definitions of terms relating to concrete pipe, see Terminology C822.
This specification is under the jurisdiction of ASTM Committee C13 on Concrete Pipe and is the direct responsibility of Subcommittee C13.02 on Reinforced Sewer
and Culvert Pipe.
Current edition approved Feb. 1, 2014Jan. 1, 2015. Published February 2014January 2015. Originally approved in 1930. Last previous edition approved in 20132014 as
C76 – 13a.C76 – 14. DOI: 10.1520/C0076-14.10.1520/C0076-15.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C76 − 15
4. Classification
4.1 Pipe manufactured in accordance with this specification shall be of five classes identified as Class I, Class II, Class III, Class
IV, and Class V. The corresponding strength requirements are prescribed in Tables 1-5.
5. Basis of Acceptance
5.1 Unless otherwise designated by the owner at the time of, or before placing an order, there are two separate and alternative
bases of acceptance. Independent of the method of acceptance, the pipe shall be designed to meet both the 0.01-in. crack and
ultimate strength requirements specified in Tables 1-5.
5.1.1 Acceptance on the Basis of Plant Load-Bearing Tests, Material Tests, and Inspection of Manufactured Pipe for Visual
Defects and Imperfections—Acceptability of the pipe in all diameters and classes produced in accordance with 7.1 or 7.2 shall be
determined by the results of the three-edge bearing tests as defined in 11.3.1; by such material tests as are required in 6.2, 6.3, 6.5,
and 6.6; by an absorption test of the concrete from the wall of the pipe as required in 11.9; and by visual inspection of the finished
pipe to determine its conformance with the accepted design and its freedom from defects.
5.1.2 Acceptance on the Basis of Material Tests and Inspection of Manufactured Pipe for Defects and Imperfections—
Acceptability of the pipe in all diameters and classes produced in accordance with 7.1 or 7.2 shall be determined by the results
of such material tests as are required in 6.2, 6.3, 6.5, and 6.6; by crushing tests on concrete cores or cured concrete cylinders; by
an absorption test of the concrete from the wall of the pipe for each mix design that is used on an order; and by inspection of the
finished pipe including amount and placement of reinforcement to determine its conformance with the accepted design and its
freedom from defects.
5.1.3 When agreed upon by the owner and manufacturer, any portion or any combination of the tests itemized in 5.1.1 or 5.1.2
may form the basis of acceptance.
5.2 Age for Acceptance—Pipe shall be considered ready for acceptance when it conforms to the requirements as indicated by
the specified tests.
A
TABLE 1 Design Requirements for Class I Reinforced Concrete Pipe
NOTE 1—See Section 5 for basis of acceptance specified by the owner. The strength test requirements in pounds-force per linear foot of pipe under
the three-edge-bearing method shall be either the D-load (test load expressed in pounds-force per linear foot per foot of diameter) to produce a 0.01-in.
crack, or the D-loads to produce the 0.01-in. crack and the ultimate load as specified below, multiplied by the internal diameter of the pipe in feet.
D-load to produce a 0.01-in. crack 800
D-load to produce the ultimate load 1200
Reinforcement, in. /linear ft of pipe wall
Wall A Wall B
Internal
Concrete Strength, 4000 psi Concrete Strength, 4000 psi
Designated
Circular Circular
Diameter,
Wall B Wall B
Reinforcement Reinforcement
in.
Elliptical Elliptical
Thickness, Thickness,
C C
Reinforcement Reinforcement
Inner Outer Inner Outer
in. in.
Cage Cage Cage Cage
60 5 0.24 0.15 0.27 6 0.21 0.12 0.23
1 1
66 5 ⁄2 0.30 0.18 0.33 6 ⁄2 0.24 0.15 0.27
72 6 0.35 0.21 0.39 7 0.29 0.17 0.32
1 1
78 6 ⁄2 0.40 0.24 0.44 7 ⁄2 0.32 0.19 0.36
84 7 0.45 0.27 0.50 8 0.36 0.21 0.41
1 1
90 7 ⁄2 0.49 0.29 0.54 8 ⁄2 0.41 0.24 0.45
96 8 0.54 0.32 0.60 9 0.45 0.27 0.51
Concrete Strength, 5000 psi
1 1
102 8 ⁄2 0.63 0.38 Inner Circular 0.24 9 ⁄2 0.54 0.32 Inner Circular 0.21
Plus Elliptical 0.38 Plus Elliptical 0.32
108 9 0.68 0.41 Inner Circular 0.27 10 0.60 0.36 Inner Circular 0.24
Plus Elliptical 0.41 Plus Elliptical 0.36
A A
114 . . . . . . . . . . . . . . . . . . . . . . . .
A A
120 . . . . . . . . . . . . . . . . . . . . . . . .
A A
126 . . . . . . . . . . . . . . . . . . . . . . . .
A A
132 . . . . . . . . . . . . . . . . . . . . . . . .
A A
138 . . . . . . . . . . . . . . . . . . . . . . . .
A A
144 . . . . . . . . . . . . . . . . . . . . . . . .
A
ForFor modified or special designs see 7.2 or with the permission of the owner utilize the provisions of Specification C655. Steel areas may be interpolated between those
shown for variations in diameter, loading, or wall thickness. Pipe over 96 in. in diameter shall have two circular cages or an inner circular plus one elliptical cage.
B
AsAs an alternative to designs requiring both inner and outer circular cages the reinforcement may be positioned and proportioned in either of the following manners:
An inner circular cage plus an elliptical cage such that the area of the elliptical cage shall not be less than that specified for the outer cage in the table and the total area
of the inner circular cage plus the elliptical cage shall not be less than that specified for the inner cage in the table,
An inner and outer cage plus quadrant mats in accordance with Fig. 1, or
An inner and outer cage plus an elliptical cage in accordance with Fig. 2.
C
EllipticalElliptical and quadrant steel must be held in place by means of holding rods, chairs, or other positive means throughout the entire casting operation.
C76 − 15
A
TABLE 2 Design Requirements for Class II Reinforced Concrete Pipe
NOTE 1—See Section 5 for basis of acceptance specified by the owner. The strength test requirements in pounds-force per linear foot of pipe under
the three-edge-bearing method shall be either the D-load (test load expressed in pounds-force per linear foot per foot of diameter) to produce a 0.01-in.
crack, or the D-loads to produce the 0.01-in. crack and the ultimate load as specified below, multiplied by the internal diameter of the pipe in feet.
D-load to produce a 0.01-in. crack 1000
D-load to produce the ultimate load 1500
Reinforcement, in. /linear ft of pipe wall
Wall A Wall B Wall C
Internal
Desig- Concrete Strength, 4000 psi Concrete Strength, 4000 psi Concrete Strength, 4000 psi
nated
Circular Circular Circular
Wall Wall Wall
Diameter,
BC BC C
Reinforcement Reinforcement Reinforcement
Thick- Elliptical Thick- Elliptical Thick- Elliptical
in.
CD CD D
ness, Reinforcement ness, Reinforcement ness, Reinforcement
Inner Outer Inner Outer Inner Outer
in. in. in.
Cage Cage Cage Cage Cage Cage
B B B
3 3
12 1 ⁄4 0.07 . . . . . . 2 0.07 . . . . . . 2 ⁄4 0.07 . . . . . .
B B B
7 1
15 1 ⁄8 0.07 . . . . . . 2 ⁄4 0.07 . . . . . . 3 0.07 . . . . . .
B B B B B B
1 1
18 2 0.07 . . . 0.07 2 ⁄2 0.07 . . . 0.07 3 ⁄4 0.07 . . . 0.07
B B B B
1 3 1
21 2 ⁄4 0.12 . . . 0.10 2 ⁄4 0.07 . . . 0.07 3 ⁄2 0.07 . . . 0.07
B B B B
1 3
24 2 ⁄2 0.12 . . . 0.11 3 0.07 . . . 0.07 3 ⁄4 0.07 . . . 0.07
B B
5 1
27 2 ⁄8 0.15 . . . 0.12 3 ⁄4 0.12 . . . 0.11 4 0.07 . . . 0.07
3 1 1 B B
30 2 ⁄4 0.15 . . . 0.14 3 ⁄2 0.14 . . . 0.12 4 ⁄4 0.07 . . . 0.07
B B
7 3 1
33 2 ⁄8 0.16 . . . 0.15 3 ⁄4 0.15 . . . 0.12 4 ⁄2 0.07 . . . 0.07
E E
36 3 0.14 0.08 0.15 4 0.12 0.07 0.12 4 ⁄4 0.07 0.07 0.08
1 1 1
42 3 ⁄2 0.16 0.10 0.18 4 ⁄2 0.15 0.09 0.17 5 ⁄4 0.10 0.07 0.11
48 4 0.21 0.12 0.23 5 0.18 0.11 0.20 5 ⁄4 0.14 0.08 0.15
1 1 1
54 4 ⁄2 0.24 0.15 0.27 5 ⁄2 0.21 0.12 0.24 6 ⁄4 0.17 0.10 0.19
60 5 0.30 0.18 0.33 6 0.24 0.15 0.27 6 ⁄4 0.21 0.12 0.24
1 1 1
66 5 ⁄2 0.35 0.21 0.39 6 ⁄2 0.31 0.19 0.34 7 ⁄4 0.24 0.15 0.27
72 6 0.41 0.24 0.45 7 0.35 0.21 0.39 7 ⁄4 0.30 0.18 0.33
1 1 1
78 6 ⁄2 0.45 0.27 0.51 7 ⁄2 0.40 0.24 0.44 8 ⁄4 0.35 0.21 0.39
84 7 0.51 0.31 0.57 8 0.45 0.27 0.51 8 ⁄4 0.41 0.24 0.45
1 1 1
90 7 ⁄2 0.57 0.34 0.63 8 ⁄2 0.51 0.31 0.57 9 ⁄4 0.48 0.29 0.53
96 8 0.62 0.36 0.69 9 0.57 0.34 0.63 9 ⁄4 0.55 0.33 0.60
Concrete Strength, 5000 psi
1 1 1
102 8 ⁄2 0.76 0.45 Inner 0.30 9 ⁄2 0.68 0.41 Inner 0.27 10 ⁄4 0.62 0.36 Inner 0.24
Circular Circular Circular
Plus El- 0.45 Plus El- 0.41 Plus El- 0.36
liptical liptical liptical
108 9 0.85 0.51 Inner 0.34 10 0.76 0.45 Inner 0.30 10 ⁄4 0.70 0.42 Inner 0.27
Circular Circular Circular
Plus El- 0.51 Plus El- 0.45 Plus El- 0.42
liptical liptical liptical
A A A
114 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A A A
120 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A A A
126 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A A A
132 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A A A
138 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A A A
144 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
For modified or special designs see 7.2 or with the permission of the owner utilize the provisions of Specification C655. Steel areas may be interpolated between those
shown for variations in diameter, loading, or wall thickness. Pipe over 96 in. in diameter shall have two circular cages or an inner circular plus one elliptical cage.
B
For these classes and sizes, the minimum practical steel reinforcement is specified. The specified ultimate strength of non-reinforced pipe is greater than the minimum
specified strength for the equivalent diameters.
C
As an alternative to designs requiring both inner and outer circular cages the reinforcement may be positioned and proportioned in either of the following manners:
An inner circular cage plus an elliptical cage such that the area of the elliptical cage shall not be less than that specified for the outer cage in the table and the total area
of the inner circular cage plus the elliptical cage shall not be less than that specified for the inner cage in the table,
An inner and outer cage plus quadrant mats in accordance with Fig. 1, or
An inner and outer cage plus an elliptical cage in accordance with Fig. 2.
D
Elliptical and quadrant steel must be held in place by means of holding rods, chairs, or other positive means throughout the entire casting operation.
E
AsAs an alternative, single cage reinforcement may be used. The reinforcement area in square in. per linear foot shall be 0.20 for wall B and 0.16 for wall C.
6. Materials
6.1 The aggregate shall be so sized, graded, proportioned, and mixed with such proportions of Portland cement, blended
hydraulic cement, or Portland cement and supplementary cementing materials, or admixtures, if used, or a combination thereof,
and water to produce a homogenous concrete mixture of such quality that the pipe will conform to the test and design requirements
of the specification. In no case, however, shall the proportion of Portland cement, blended hydraulic cement, o
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