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Department of Civil Engineering
CIVL 3121 - Interesting Information about Structures
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News Accelerated Bridge Construction

Council on Tall buildings and Urban Habitat (CTHUH) -

International Database and Gallery of Structures -

AISC IDEAS2 Awards -


National Council of Structural Engineers Associations (NCSEA)
Excellence in Structural Engineering Awards

National Steel Bridge Alliance (NSBA) Prize Bridge Competition



I-35W Bridge Failure

  • The National Transportation Safety Board (NTSB) announced that a serious design flaw was found in some of the gusset plates on the I-35W bridge in Minneapolis, which collapsed on August 1, 2007. As a result, the NTSB issued a recommendation that the Federal Highway Administration (FHWA) require bridge owners to verify that the stress levels in all structural elements, including gusset plates, remain within applicable requirements whenever planned modifications or operational changes may significantly increase stresses. This would apply to all non-load-path-redundant steel truss bridges within the National Bridge Inventory.

  • The collapse of this bridge led to 13 deaths, 145 injuries and serious disruption to the lives of thousands of motorists and residents in the region. ASCE again extends it condolences to the victims of this tragedy. As a profession, it is our obligation to learn all that we can from such events. ASCE will continue to monitor the NTSB’s investigation and will incorporate the recommendations and lessons learned into our future technical and professional policies and standards.

  • ASCE urges its members to review the NTSB’s report and recommendations.

    NTSB Safety Recommendation Letter

    FHWA Turner-Fairbank Highway Research Center Interim Report -
    Adequacy of the U10 & L11 Gusset Plate Designs for the Minnesota Bridge No. 9340 (I-35W over the Mississippi River)

    I-35 Bridge was doomed from the Start
     by Tony Kennedy and Paul McEnroe -
    Star Tribune staff writers October 26, 2008



This website was originally developed by Charles Camp for CIVL 3121.
This site is maintained by the Department of Civil Engineering at the University of Memphis.
Your comments and questions are welcomed.

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Department of Civil Engineering | 104 Engineering Science Bldg |Memphis, TN 38152 | Phone: 901/678-2746 | Fax: 901/678-3026 | Last updated: 03/06/2020