ASTM A998/A998M-98(2003)

    Standard Practice for Structural Design of Reinforcements for Fittings in Factory—Made Corrugated Steel Pipe for Sewers and Other Applications

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    1. Scope

    1.1 This practice covers the structural design of reinforcement for fittings in factory-made, round corrugated steel pipe, conforming to Specifications A 760/A 760M or A 762/A 762M, for use as storm and sanitary sewers and other buried applications. This practice is for fittings on pipe installed in a trench or embankment and subjected to earth loads and live loads. It must be recognized that a buried corrugated pipe is a composite structure made up of the steel ring and the soil envelope, and both elements play a vital part. Both main and branch pipe shall be designed in accordance with Practice A 796/A 796M and installed in accordance with Practice A 798/A 798M.

    1.2 This practice covers the structural design of reinforcement for fittings such as those for branch pipes. Refer to Section 5 for design limitations.

    1.3 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

    1.4 The values stated in either inch-pound units or SI units shall be regarded separately as standard. The values stated in each system are not 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 design is to be performed using SI units.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    A36/A36M Specification for Carbon Structural Steel

    A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

    A307 Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength

    A760/A760M Specification for Corrugated Steel Pipe, Metallic-Coated for Sewers and Drains

    A762/A762M Specification for Corrugated Steel Pipe, Polymer Precoated for Sewers and Drains

    A796/A796M Practice for Structural Design of Corrugated Steel Pipe, Pipe-Arches, and Arches for Storm and Sanitary Sewers and Other Buried Applications

    A798/A798M Practice for Installing Factory-Made Corrugated Steel Pipe for Sewers and Other Applications

    A902 Terminology Relating to Metallic Coated Steel Products

    A929/A929M Specification for Steel Sheet, Metallic-Coated by the Hot-Dip Process for Corrugated Steel Pipe

    F568M Specification for Carbon and Alloy Steel Externally Threaded Metric Fasteners (Metric)

    AASHTO Standard

    LRFDBridgeDesignSpec

    Society of Automotive Engineers

    J78 Steel Self-Drilling Tapping Screws Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.org.


    ICS Code

    ICS Number Code 77.140.85 (Iron and steel forgings)

    UNSPSC Code

    UNSPSC Code 40170000(Pipe piping and pipe fittings)


    DOI: 10.1520/A0998_A0998M-98R03

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