Contacts: Tom Walsh - Consultant, Mario Taredes - TRI, Mike Pluimer - TRI, Bill Bailey - Material Specification, Mike McGough - Flexible Liaison Committee Agenda, Brian Korschgen - Auditor


AASHTO Material and LRFD Specifications

10/01/2014 - 03/01/2017

Material Specification

Choose Material Spec Author

10/01/2014 - 01/01/2015
  • Materail Specification Author must be experienced with AASHTO procedures and personnel.
  • Contech Duromaxx wrote their own.

Write Material Specification

01/01/2015 - 10/01/2015
  • Write Specification Similar to Contech's Duromaxx MP-20 content.
  • Originally it was thought we could piggy-back onto the MP-20 Specification, however, several voting members of AASHTO have veto'd. Information per Mario Taredes.
  • It is known that Contech approached AASHTO as if it were ASTM and this mistake has cost them an extension of approximately 2 years.
  • Contech's total timeline for MP-20 ratification is 3.5 years.

Material Specification Ratification

10/01/2015 - 03/01/2017
  • This ratification periods entails allowing all AASHTO voting members the right to have rebuttals and concerns with KanaPipe addressed.
  • This ratification period normally lasts a minimum of 1 year.
  • For Contech and Duromaxx this period is anticipated to last ~2 years. Their expected acceptance date is January 2016 at the earliest.

LRFD Design Specification

Choose LRFD Specification Author

10/01/2014 - 01/01/2015
  • There are two options for writing and getting the LRFD standard written and approved.
  • Option 1 - A La Carte enables us to choose the author and testing institutions and regimens.
  • Option 2 - Bundle via TRI.

Option 1 - A la Carte

  • A la Carte could possibly allow Kanaflex to keep a closer look on each step of the process.
  • Choose author and test facilities individually to maximize time/cost restraints.


11/01/2014 - 09/01/2015
  • Testing to be dictated by LRFD Design Specification Author in conjunction with AASHTO requirements.
  • Some test requirements that have been mentioned by TRI, AASHTO design engineers:
    • Burial Test
    • Cross Section Analysis
    • Modulus of Stiffness
  • Burial test for can be conducted at TRI of University of Utah.
  • NCLS has already been done at TRI.
  • 100 year approval required for many states in order to be used in highway crossings. Requires 265 corrosion test. ADS has this certification and Southern Pipe is finishing theirs.

Tim McGrath

05/02/2015 - 03/01/2016
  • Tim McGrath has written LRFD specifications for ADS in the past and is known to be 'fast.'
  • Well known and respected in the pipe industry 30+ years of experience.

Ian Moore

05/02/2015 - 03/01/2016
  • Industry expert with 35+ years of experience.
  • Wrote Contech's Duromaxx LRFD standard.

Tim Toliver

05/02/2015 - 05/01/2016
  • Tim Toliver is knowledgeable on the process, however, as of yet I am unsure if he is qualified for the job of design author.

Ratification via AASHTO

03/01/2016 - 03/01/2017
  • AASHTO will review, make amendments and vote on eligibility of the proposed LRFD standard.
  • Final timeline rough approximation at this time.

Option 2 - Bundle Via TRI

Texas Research International

11/01/2014 - 03/01/2017
  • Texas Research International will handle all testing, LRFD writing and ratification procedures.
  • Submitted for quote and timeline.