THE CONCRETE BRIDGE MAGAZINE

WINTER 2009

ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

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40 | ASPIRE , Winter 2009 Precautions Suggested by PCI Personnel involved in various design stages should not hesitate to refer questions regarding the suitability of specified details affecting LTS, such as handling and bearing details, to their local girder producer. All concerned should be involved in this process, including owners, designers, design checkers, and personnel involved in the drafting of contract plans or shop drawings. Ultimately, contractors must be aware of bearing details. They must formulate careful girder erection procedures that minimize LTS. Bearing components should be stiff in the transverse rotational direction. Girders must be centered on the bearings. The girder webs must be in a plumb position at the time they are fully seated on their supports. Full rotational restraint must be provided at girder supports. The first girder to be erected in a span should be braced to the substructure. Subsequent girders can be braced against previously erected girders. _______________ Chris D. Hill is senior project manager/project engineer with Florence & Hutcheson Inc. Consulting Engineers, Lexington, Ky., John S. Dick is a consultant in the concrete industry and executive editor of ASPIRE™ magazine, Monument, Colo., Maher K. Tadros is principal technical professional, Structures, PBS&J, Tampa, Fla., and the Leslie D. Martin professor of civil engineering, University of Nebraska, Lincoln, Neb. EDIToR'S NoTE This article was reviewed and approved by the Committee on Bridges, the Transportation Activities Committee, and the Technical Activities Committee of the Precast/Prestressed Concrete Institute. Example of a narrow, tall bearing pad that must be given attention by all project stakeholders and avoided by designers. Award Winning... ...corrosion solutions Award-winning products and services for bridges, buildings, parking garages, marine structures, industrial facilities and more! • Galvanic Protection • Impressed Current • Chloride Extraction • Re-Alkalization • Post-Tension Corrosion • Corrosion Investigation • Custom Design • System Installation • Structure Monitoring • Design-Build-Maintain • Specialty Concrete Restoration Services Contact Vector Corrosion Technologies on your next corrosion repair project! USA 813-830-7566 CANADA 204-489-6300 www.vector-corrosion.com HISTORIC BOK TOWER Bok Sanctuary, Florida NORTH CARGO PIERS Canaveral Port Authority RAINBOW BRIDGE Idaho Transportation Department Advertisers Index Bentley/LEAP . . . Inside Front Cover Campbell Scientific . . . . . . . . . . . 33 DSI . . . . . . . . . . . . . . . . . . . . . . . . . 17 ERICO . . . . . . . . . . . . . . . . . . . . . . 42 FIGG . . . . . . . . . . . . . . . . . . . . . . . . 3 Larsa . . . . . . . . . . . . . . . . . . . . . . . . 7 PCAP—CABA . . . . . . . . . . . Back Cover PCI . . . . . . . . . . . . . Inside Back Cover Splice Sleeve . . . . . . . . . . . . . . . . . 21 T.Y. Lin International . . . . . . . . . . 29 ThysenKrupp . . . . . . . . . . . . . . . . . 13 Williams Form Eng. Corp. . . . . . . 13 Vector Corrosion Technologies . . 40

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