AASHTO Asset Management Task Force
NCHRP 20-7
Proposed Research Needs Statement
Subcommittee on Bridges and Structures
Malcolm Kerley
April 2011
TITLE
Review and Update of the AASHTO Movable Bridge Inspection, Evaluation and Maintenance Manual, 1st Edition.
BACKGROUND / NEEDS STATEMENT
The AASHTO Movable Bridge Inspection, Evaluation and Maintenance Manual was first issued in 1998. It is still currently available in its first edition. In the intervening years, there have been many new developments in bridge design and analysis methodologies, as well as many developments in bridge inspection, evaluation and maintenance that were not contemplated in the 1998 edition of the movable bridge manual. For example, the AASHTO Subcommittee on Bridges and Structures (SCOBS) has adopted entirely new bridge design specifications (i.e., AASHTO Load and Resistance Factor Bridge Design (LRFD) Specifications, 5th edition, 2009). Correspondingly, a companion document for the design of movable bridges, incorporating the LRFD methodology, was adopted and is currently in its 2nd edition, 2007. AASHTO SCOBS also adopted a Manual on Bridge Evaluation, currently in its 2nd edition, 2010. This document contains all of the latest developments to assist bridge owners with established inspection procedures and evaluation practices to meet federal bridge inspection standards. A number of other relevant documents have also been similarly developed, issued and upgraded over the years. The Movable Bridge Inspection, Evaluation and Maintenance Manual, which predates all of these newer documents, no longer reflects the latest thinking and developments in bridge design and evaluation, and so has lost its relevance in addressing the inspection, evaluation and maintenance of the nation’s inventory of movable bridges.
A more up-to-date and relevant document is needed to provide current, state-of-the-art guidance to owners and practitioners in the movable bridge industry. A more current manual will assure that the latest thinking in movable bridge inspection, evaluation and maintenance is being utilized. The result will be a national inventory of movable bridges that is safer, in better condition and better maintained.
RESEARCH OBJECTIVE
The primary objective of this research is to produce a Second Edition of the AASHTO Movable Bridge Inspection, Evaluation and Maintenance Manual. The new edition will be prepared in light of all the latest developments within the general bridge design and evaluation industry, applying those general developments to the specific topic of movable bridges. A complete re-write of the first edition is not anticipated, but rather a review and updating of the current edition to make it compatible with other recent developments in comparable documents.
WORK TASKS
Tasks anticipated in this project include the following:
• Review the current manual and identify sections that are outdated and require updating.
• Coordinate proposed changes to the manual with current editions of similar relevant AASHTO documents.
• Seek the advice of owners and practitioners in the movable bridge industry as needed on specific topics and issues.
• Develop proposed text for inclusion in a proposed second edition of the manual.
• Coordinate with the AASHTO SCOBS T8 Technical Committee for Movable Bridges to facilitate the preparation and issuance of a new edition of the manual.
FUNDING REQUESTED AND TIME REQUIRED
It is estimated that this research will take nine months to complete and will require $100,000.
CONTACT PERSON
Robert J. Healy
Chairman, AASHTO SCOBS T8 Technical Committee for Movable Bridges
Deputy Director
Office of Structures
Maryland State Highway Administration
707 N. Calvert Street
Baltimore MD 21202
Phone: 410.545.8063
Fax: 410.209.5002
Email: rhealy@sha.state.md.us
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