In accordance with the weight and resistance issue layout philosophy (LRFD), this booklet is the results of a five-year examine attempt lower than AASHTO's nationwide Cooperative road study application (NCHRP) venture 12-42, and a persisted attempt via AASHTO technical committees. This significant step in greater bridge layout and extra exact research is predicted to steer to bridges displaying stronger serviceability, better long term maintainability, and extra uniform degrees of defense. because the First variation used to be released in 1994, the provisions have persevered to be up to date and greater in line with carrying on with study and the adventure of the consumer neighborhood. the recent requisites were systematically demonstrated in trial designs and feature now been applied by means of all 50 states, with forty eight states totally carried out.

incorporated during this digital variation are the 2008 and 2009 intervening time Revisions. Following every one bankruptcy the revisions are pointed out in addition to associated in the course of the complete booklet the place on hand. See the replaced and Deleted Articles sections for an entire checklist of adjustments to every part.
Content:
entrance subject
• Preface and Abbreviated desk of Contents
• desk of Contents
• replaced and Deleted Articles, 2007
• replaced and Deleted Articles, 2008
• replaced and Deleted Articles, 2009
Section 1. Introduction
Section 2. normal layout and placement Features
Section three. a lot and cargo Factors
Section four. Structural research and Evaluation
Section five. Concrete Structures
Section 6. metal Structures
Section 7. Aluminum Structures
Section eight. wooden Structures
Section nine. Decks and Deck Systems
Section 10. Foundations
Section eleven. Abutments, Piers, and Walls
Section 12. Buried buildings and Tunnel Liners
Section thirteen. Railings
Section 14. Joints and Bearings
Index

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Extra resources for AASHTO LRFD Bridge Design Specifications, Customary U.S. Units with 2008 and 2009 U.S. Edition Interim Revisions

Example text

1 Bridges should be designed to avoid undesirable structural or psychological effects due to their deformations. While deflection and depth limitations are made optional, except for orthotropic plate decks, any large deviation from past successful practice regarding slenderness and deflections should be cause for review of the design to determine that it will perform adequately. 7. Service load deformations may cause deterioration of wearing surfaces and local cracking in concrete slabs and in metal bridges that could impair serviceability and durability, even if self-limiting and not a potential source of collapse.

All rights reserved. Duplication is a violation of applicable law. 1 Bridges should be designed to avoid undesirable structural or psychological effects due to their deformations. While deflection and depth limitations are made optional, except for orthotropic plate decks, any large deviation from past successful practice regarding slenderness and deflections should be cause for review of the design to determine that it will perform adequately. 7. Service load deformations may cause deterioration of wearing surfaces and local cracking in concrete slabs and in metal bridges that could impair serviceability and durability, even if self-limiting and not a potential source of collapse.

2012 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law. 1—General SECTION 2: GENERAL DESIGN AND LOCATION FEATURES 2-11 Computed girder rotations at bearings should be accumulated over the Engineer’s assumed construction sequence. Computed rotations at bearings shall not exceed the specified rotational capacity of the bearings for the accumulated factored loads corresponding to the stage investigated. 2 and may reflect the computed accumulated deflections due to the Engineer’s assumed construction sequence.

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