Designing Stormwater Chambers to Meet AASHTO Specifications

    Volume 7, Issue 8 (September 2010)

    ISSN: 1546-962X


    Published Online: 10 August 2010

    Page Count: 8

    McGrath, Timothy J.
    P.E., Senior Principal, Simpson Gumpertz & Heger, Inc., Waltham, MA

    Mailhot, David
    P.E., National Engineering Manager, StormTech LLC, Weathersfield, CT

    (Received 11 November 2009; accepted 16 July 2010)


    Thermoplastic stormwater chambers have been successfully used on many projects to meet current federal regulations controlling discharges from newly developed sites. These structures are commonly located under parking lots or roadways and subjected to vehicular loads on a regular basis. Given this application, it is logical to design these structures for loads specified in the AASHTO LRFD Specifications for Highway Bridges, which provide design procedures for thermoplastic culvert pipe for use under roadways. However, experience has shown that many drainage engineers are not familiar with the AASHTO Specifications and have difficulty evaluating product manufacturer’s claims relative to AASHTO requirements. This paper presents the key aspects of the AASHTO specifications that should be applied to stormwater chamber design, such as determining applicable loads, load factors, design of profile sections, and consideration of time dependent properties. Also addressed are design matters for chambers not directly addressed by AASHTO. Of particular importance in developing unique structures is the validation of designs and chamber safety levels through full scale testing.

    Paper ID: JAI102860

    DOI: 10.1520/JAI102860

    ASTM International is a member of CrossRef.

    Title Designing Stormwater Chambers to Meet AASHTO Specifications
    Symposium Plastic Pipe and Fittings: Yesterday, Today, and Tomorrow, 2009-05-09
    Committee F17