Fundamentals of LRFR and Applications of LRFR for Bridge Superstructures

NHI Course Number: 130092


A detailed description of this course is on the National Highway Institute website. This description is repeated below.

This course provides novice and experienced bridge engineers with the fundamental knowledge necessary to apply the most recent AASHTO LRFR Specifications to bridge ratings. This course introduces participants to applications of LRFR specifications that can be used to enhance bridge safety and to identify and discuss the steps to ensure successful transition to this new state-of-the-art methodology.

Load Rating of Concrete and Steel Superstructure Bridges will provide participants with in- depth training in evaluating reinforced and prestressed concrete bridges and steel bridges using LRFR methodology. This course will illustrate the use of the current AASHTO evaluation specifications and state-of-the-art evaluation methods with step-by-step examples.


  • Upon completion of the course, participants will be able to:
  • Describe the purpose of performing a load rating
  • Identify the benefits of the LRFR methodology
  • Demonstrate the LRFR process and the general load rating equations
  • Explain legal loads and their use in load rating
  • Determine distribution factors for load rating
  • State the LRFR limit states
  • Select evaluation factors for rating
  • Describe the process for load posting and importance of load posting
  • Describe the procedure for checking overload permits
  • Demonstrate the application of LRFR requirements by completing load rating exercises
  • Identify material deteriorations that affect load capacity of bridge components
  • Calculate the flexural resistances of a prestressed concrete girder for load rating
  • Calculate the shear resistance of a prestressed concrete girder for load rating
  • Apply the load rating procedures for concrete slab bridges
  • Calculate the flexural and shear resistance of a steel I-girder bridge for load rating
  • Evaluate fatigue for load rating a steel girder bridge
  • Apply LRFR requirements by completing load rating exercises

Target Audience

Bridge engineers with 0-20 years of experience.

Nearby Hotels

Best Western Plus University Park Inn & Suites
2500 University Blvd.
Ames, Iowa 50010

Gateway Hotel and Conference Center
2100 Green Hills Drive
Ames, Iowa 50014

Holiday Inn
2609 University Blvd.
Ames, Iowa 50010

For More Information

If you have questions or need more information, please contact Sharon Prochnow at 515-294-3781 or