TxDOT Research Library - Publication Details

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Title:

Culvert Rating Guide

Edition:

-- Second Edition

Report No.:

FHWA/TX-16/88-8XXIA001-P3

Authors:

William D. Lawson [and three others]

Published:

[2018]

Lubbock, Texas

Texas Tech University. Center for Multidisciplinary Research in Transportation

Type:

Online document

1 PDF (196 pages)

Online Access:

https://www.depts.ttu.edu/techmrtweb/documents/rep...

Access Note:

10.1 MB

Summary

The Culvert Rating Guide presents a clear, repeatable and valid procedure for Texas Department of Transportation (TxDOT) engineers and their consultants to use for load rating culverts in the TxDOT roadway system. Stated another way, the Culvert Rating Guide is intended to clarify policy assumptions, minimize procedural inconsistencies and resolve analytical variances associated with load rating which – left unattended – have been shown to accumulate and coalesce into a "disconnect" between observed structure performance and calculated load rating values. Fundamentally this Guide is about helping TxDOT achieve an acceptable level of culvert load rating accuracy and precision that avoids unnecessary restrictions on commerce such as may result from, on the one hand, unfounded (high) load ratings that lead to premature structure deterioration or failure or, on the other hand, unwarranted (low) ratings that lead to unnecessary structure replacements or upgrades. The second edition of the Culvert Rating Guide reflects the authors' experiences using the first edition and incorporates significant new research findings from recent studies which have both further developed the culvert load rating process and improved the accuracy and precision of the primary demand model used for culvert load rating analyses. Some topics in the original Guide have been condensed or eliminated, while others have been expanded or added. Research-driven improvements to the culvert load rating procedure, policy, practice and application over the past five years have essentially resulted in a complete rewrite of the original Culvert Rating Guide. While the topic is still load rating TxDOT culverts, the outcome is more accurate and precise load rating results.

Publ. Place

Lubbock, Texas

Contents

Chapter 1. Introduction --
Chapter 2. Policy Requirements --
Chapter 3. Culvert Load Rating Procedure --
Chapter 4. Culvert Document Capture and Classification --
Chapter 5. Structure History and Segment Interpretation --
Chapter 6. Parameter Interpretation and Data Capture --
Chapter 7. Design Selection --
Chapter 8. Culvert Capacity Calculations --
Chapter 9. Level 1 (Structural Frame) Analytical Model --
Chapter 10. Level 3 (Soil-Structure Interaction) Analytical Model --
Chapter 11. The General Analytical Model for Culvert Load Rating --
Chapter 12. Limitations --
References --
Appendix A. Example: Document Capture and Classification --
Appendix B. Example: Structure History and Segment Interpretation --
Appendix C. Example: Parameter Interpretation and Data Capture --
Appendix D. Example: Design Selection --
Appendix E. Example: Level 1 and Level 3 Load Rating --
Appendix F. Example: Reporting

Notes

"The authors submitted the DRAFT Culvert Rating Guide, 2nd Edition on October 12, 2017... The FINAL version of the Culvert Rating Guide, 2nd Edition (this document) was published July 20, 2018." --p.iii

Study Number

TxDOT IAC 88-8XXIA001
TxDOT IAC 88-4XXIA001

Study Title

Improving TxDOT’s Culvert Load Rating Process and Software
Load Rating TxDOT pre-1980 In-Service Culverts

Study Sponsor

Other Titles

Culvert Rating Guide, Second Edition