Texas Mill Test Information for Load Ratings

The objective of this project is to develop a database of material properties, including yield and ultimate strength, for historical steel materials that have been used in rolled sections and reinforcing bars over the past 80 years. The motivation for this project is to use more accurate values of material strengths in load rating, rather than the conservative values proposed in the American Association of State Highway and Transportation Officials (AASHTO) Manual for Bridge Evaluation (MBE) that could result in increases to load ratings of historical structures, while maintaining the reliability (or the probability of failure) at the same level as acceptable values for new constructions. To this end, the project consists of nine tasks including a survey of the existing literature and other state Departments of Transportation (DOTs), compiling a database of historical material properties from Texas Department of Transportation (TxDOT) records, obtaining and testing material samples from decommissioned historical structures, conducting a statistical analysis of the data, and conducting example load ratings to illustrate and quantify the benefit of using the revised material property data for load rating historical structures.


  • English


  • Status: Completed
  • Funding: $260475
  • Contract Numbers:


  • Sponsor Organizations:

    Texas Department of Transportation

    125 E. 11th Street
    Austin, TX  United States  78701-2483
  • Project Managers:

    Glancy, Chris

  • Performing Organizations:

    University of Houston, Texas

    Houston, TX  United States 
  • Principal Investigators:

    Dawood, Mina

  • Start Date: 20160901
  • Expected Completion Date: 20180831
  • Actual Completion Date: 20180831

Subject/Index Terms

Filing Info

  • Accession Number: 01626216
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-6939
  • Files: RIP, STATEDOT
  • Created Date: Feb 17 2017 3:26PM