Load Rating and Posting of Long-Span Bridges

According to the National Bridge Inventory, approximately 6200 bridges in the United States have span lengths greater than 200 feet. Although the current American Association of State Highway and Transportation Officials (AASHTO) specifications for load and resistance factor rating (LRFR) and load factor rating (LFR) provide sufficient direction for evaluating bridges with span lengths ≤ 200 feet, they are not fully developed for evaluating structures with span lengths > 200 feet. Long-span bridges get special engineering analysis in the design phase, but methods for evaluating them in service are limited. To ensure public safety while sustaining commerce and preserving vital infrastructure, methods for rational load rating, permitting, and posting are essential. Research is needed to help state departments of transportation evaluate their long-span bridges The objective of this research is to develop procedures for load rating, posting, and permitting of highway bridges with spans greater than 200 feet in length. It shall consider all applicable load effects.


  • English


  • Status: Proposed
  • Funding: $500000
  • Contract Numbers:

    Project 12-127

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    Office of Planning, Environment and Realty (HEP)
    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Abu-Hawash, Ahmad

  • Start Date: 20240319
  • Expected Completion Date: 0
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01900457
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 12-127
  • Files: TRB, RIP
  • Created Date: Nov 27 2023 7:28PM