ASTM A798.pdf
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Designation: A 798/A 798M – 01
Standard Practice for
Installing Factory-Made Corrugated Steel Pipe for Sewers
and Other Applications
1
This standard is issued under the fixed designation A 798/A 798M; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This practice covers procedures, soils, and soil place-
ment for the proper installation of corrugated steel pipe and
pipe-arches produced to Specification A 760/A 760M or
A 762/A 762M, in either trench or embankment installations. A
typical trench installation and a typical embankment (projec-
tion) installation are shown in Figs. 1 and 2, respectively. The
pipes described in this practice are manufactured in a factory
and furnished to the job in lengths ordinarily from 10 to 30 ft
[3 to 9 m], with 20 ft [6 m] being common, for field joining.
This practice applies to structures designed in accordance with
Practice A 796/A 796M.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.3 The values stated in either inch-pound units or SI units
shall be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
system must be used independently of the other, without
combining values in any way. SI units are shown in brackets in
the text for clarity, but they are the applicable values when the
installation is to be performed using SI units.
2. Referenced Documents
2.1 ASTM Standards:
A 760/A760M Specification for Corrugated Steel Pipe,
Metallic-Coated for Sewers and Drains
2
A 762/A762M Specification for Corrugated Steel Pipe,
Polymer Precoated for Sewers and Drains
2
A 796/A796M Practice for Structural Design of Corrugated
Steel Pipe, Pipe-Arches, and Arches for Storm and Sani-
tary Sewers and Other Buried Applications
2
A 902 Terminology Relating to Metallic Coated Steel Prod-
ucts
2
D 698 Test Method for Laboratory Compaction Character-
istics of Soil Using Standard Effort (12 400 ft-lbf/ft
3
[600
kN-m/m
3
])
3
D 1556 Test Method for Density of Soil in Place by the
Sand-Cone Method
3
D 2167 Test Method for Density and Unit Weight of Soil in
Place by the Rubber Balloon Method
3
D 2487 Classification of Soils for Engineering Purposes
(Unified Soil Classification System)
3
D 2922 Test Methods for Density of Soil and Soil-
Aggregate in Place by Nuclear Methods (Shallow Depth)
3
D 2937 Test Method for Density of Soil in Place by the
Drive-Cylinder Method
3
3. Terminology
3.1 Definitions—For definitions of general terms used in
this practice, see Terminology A 902.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 bedding—the earth or other material on which a pipe
is supported.
3.2.2 haunch—the portion of the pipe cross section between
the maximum horizontal dimension and the top of the bedding.
3.2.3 invert—the lowest point on the pipe cross section;
also, the bottom portion of a pipe.
3.2.4 pipe—a conduit having full circular shape; also, in a
general context, all structure shapes covered by this practice.
3.2.5 pipe-arch—an arch shape with an approximate semi-
circular crown, small-radius corners, and large-radius invert.
4. Significance and Use
4.1 Corrugated steel pipe functions structurally as a flexible
ring which is supported by and interacts with the compacted
surrounding soil. The soil constructed around the pipe is thus
an integral part of the structural “system.” It is therefore
important to ensure that the soil structure or backfill is made up
of acceptable material and well-constructed. Field verification
of soil structure acceptability using Test Methods D 1556,
D 2167, D 2922, or D 2937, as applicable, and comparing the
results with Test Method D 698 in accordance with the
specifications for each project is the most reliable basis for
installation of an acceptable structure. The required density and
1
This practice is under the jurisdiction of ASTM Committee A05 on Metallic
Coated Iron and Steel Products and is the direct responsibility of Subcommittee
A05.17 on Corrugated Steel Pipe Specifications.
Current edition approved April 10, 2001. Published June 2001. Originally
published as A 798 – 82. Last previous edition A 798/A 798M–97a.
2
Annual Book of ASTM Standards, Vol 01.06.
3
Annual Book of ASTM Standards, Vol 04.08.
1
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