AASHTO – The American Association of State Highway Transportation Officials – is a nonprofit, nonpartisan association representing highway and transportation departments in the 50 states, the District of Columbia, and Puerto Rico.

The AASHTO LRFD Bridge Construction Specifications are intended for use in the construction of bridges. The specifications employ the Load and Resistance Factor Design (LRFD) methodology, and are designed to be used in conjunction with the AASHTO LRFD Bridge Design Specifications. Revisions from the 3rd edition of this title include a complete revision of Section 3, Temporary Works, and changes to Section 10, Prestressing; Section 11, Steel Structures; Section 19, Bridge Deck Joint Seals; and Section 27, Concrete Culverts. These specifications cover the design, evaluation, and rehabilitation of highway bridges. The design provisions of these specifications employ the Load and Resistance Factor Design (LRFD) methodology, which is based on structural reliability theory, and calibrated to achieve a target level of reliability. Updates to this edition include: * A completely updated and revised Section 5 on Concrete Structures (Appendix E5, comparing the 7th and 8th Edition versions of this Section can be downloaded below) * New, simplified steel. The AASHTO Materials Standards contain specifications, test methods, and provisional standards commonly used in the construction of highway facilities.

They are available as a one-year online subscription. When you subscribe, you will automatically receive access to all updates published during your subscription period, as well as access to recent past editions, with changes between editions highlighted for ease of reference.

The Materials Standards are updated three times per year, in mid-April, mid-June, and mid-August. About AASHTO AASHTO – The American Association of State Highway Transportation Officials – is a nonprofit, nonpartisan association representing highway and transportation departments in the 50 states, the District of Columbia, and Puerto Rico. It represents all transportation modes, including air, highways, public transportation, active transportation, rail, and water.

Its primary goal is to foster the development, operation, and maintenance of an integrated national transportation system. AASHTO works to educate the public and key decision makers about the critical role that transportation plays in securing a good quality of life and sound economy for our nation. AASHTO serves as a liaison between state departments of transportation and the Federal government. AASHTO is an international leader in setting technical standards for all phases of highway system development.

Standards are issued for design, construction of highways and bridges, materials, and many other technical areas.