AASHTO LRFDBDS: 2020 [pdf]

AASHTO LRFDBDS: 2020 [pdf]

AASHTO LRFD Bridge Design Specifications, 9th Edition

The AASHTO LRFD Bridge Design Specifications are intended for use in the design, evaluation, and rehabilitation of bridges. The specifications employ the Load and Resistance Factor Design (LRFD) methodology, using factors developed from current statistical knowledge of loads and structural performance.

This new 9th edition includes revisions to almost all sections of the specifications. Following are the key revisions and updates made to the LRFD Bridge Design Specifications, 9th Edition, from the previous 2017 eighth edition:

• Overall stability (slopes with or without foundations) has been moved from Service to the Strength Limit State in Sections 3, 10, 11, and several other sections;
• Extensive changes to Section 6, Steel Structures;
• Update to the various design tables for conformance with the National Design Specification Supplement, Design Values for Wood Construction 2018 version in Section 8, Wood Structures;
• New information on settlement in Section 10, Foundations;
• New information on MSE walls and soil nails in Section 11, Abutments, Piers, and Walls;
• New concrete pipe options in Section 12, Buried Structures and Tunnel Liners;
• Various changes throughout to make the AASHTO LRFD Bridge Design Specifications more internally consistent.

9781560517382, 978-1-56051-738-2, AASHTO LRFDBDS-9