LIVE LOAD RATING OF SHORT SPAN HIGHWAY BRIDGES AS CONTROLLED BY THE EXTERIOR GIRDER
The 1973 AASHTO Standard Specifications for Highway Bridges introduced the requirement that "In no case shall as exterior stringer have less carrying capacity than an interior stringer". This statement resulted from the concern that many original exterior stringers become interior stringers when bridges were widened. Since current specifications are used when rating the live load capacity of existing bridges, this newly introduced requirement has in some cases resulted in an unnecessary reduction in live load ratings. This study examines a number of cases in which the exterior stringers are lighter than the interior ones and illustrates the effects of the new provision. The report concludes with a recommendation for an exemption provision from this requirement in the appropriate article of the Manual for Maintenance Inspection of Bridges, 1974, 2nd. ed., AASHTO. /Author/
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- Record URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/HPR1366
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Supplemental Notes:
- This report was sponsored by the Federal Highway Administration.
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Corporate Authors:
Virginia Highway and Transportation Research Council
Charlottesville, VA United States -
Authors:
- Kinnier, H L
- Barton, F W
- Publication Date: 1977-9
Media Info
- Features: Appendices; References; Tables;
- Pagination: 28 p.
Subject/Index Terms
- TRT Terms: Bridge superstructures; Girders; Highway bridges; Live loads; Specifications; Stringers; Weight
- Uncontrolled Terms: Bridge spans
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00168400
- Record Type: Publication
- ISBN: HPR 1366
- Report/Paper Numbers: FHWA-RD-77-50644 Final RPt., FCP 45F3772
- Contract Numbers: HP&R
- Files: NTIS, NTL, TRIS, STATEDOT
- Created Date: Mar 7 1978 12:00AM