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SR-50 over Happy Hollow Creek: Tennessee’s Longest Jointless Concrete Bridge at 1175’ Long. Eliminating Bridge Joints – A Preservation Strategy Houston Walker, P.E., Tennessee Department of Transportation
The use of jointless bridges with integral abutments can be an economical strategy to help preserve bridges from the ravages of salt induced corrosion damage, while providing several inherent design advantages. Full Article> Fully Precast Bridge System used in Washington State Highways for Life Project, Part 2—Bridge Design and Construction Bijan Khaleghi, Washington State DOT
The Washington State Department of Transportation’s Highways for Life project offers a precast concrete bridge system that is suitable for high seismic regions and accelerated bridge construction projects. Part two of the article discusses the bridge design concept and construction. Full Article> Crystalline Silica Rule Under Review at the Office of Management and Budget Thomas Harman, Portland Cement Association, and Tony Kojundic, Elkem Materials Inc.
Worker exposure to RCS has been on OSHA’s agenda for some time. OSHA is believed to be considering three permissible exposure limits (PEL) for exposure to crystalline silica in the proposal. Full Article>
HPC Bridge Views, Issue 70, Mar/Apr 2011
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