The spread defense
Roads & Bridges
March 2008
By Jerry Byrne
Crews save significant time and maintenance costs with overlay in Kansas
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All Decked Out
Roads & Bridges
September 2004
The Al Zampa Memorial (New Carquinez) Bridge is the first major suspension bridge to be built in the U.S. for nearly 40 years.
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Blue Shield
Roads & Bridges
May 2004
Information provided by Pitchmastic PmB Ltd., Sheffield, U.K.
The U.K. Highways Agency recognized the importance of waterproofing back in the 1960s and since then it has been mandatory to waterproof all bridge structures in England, Ireland, Scotland and Wales.
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Resin due
Roads & Bridges
November 2003
Jack Scholz
Completed in 1936, New York City's Triborough is a mature bridge now undergoing a multi-year, multi-million dollar reconstruction project to ensure many more years of service. Specifications required the orthotropic panels to be sandblasted and then protected with a multicoat aggregate-filled polysulfide epoxy overlay riding surface.
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Blasting is no way out
Roads & Bridges
September 2003
Craig Ballinger, P.E., and Wayne Senick, Contributing Authors
By using high-pressure water cleaning and selective UHP water jetting followed by an overcoat system supplied by Termarust Technologies, the owner was able to substantially reduce the cost of cleaning and coating the historic Quebec Bridge.
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Not just a pretty face-lift
Roads & Bridges
April 2003
Allen Zeyher
Koch Skanska Inc., Carteret, N.J., contracted with New York Cityn rehab the Manhattan Bridge. Koch's original contract for the north side of the bridge included stiffening the suspended spans; replacing the truss bearings on the approaches; removing all the lead-based paint and repainting; reconstructing the subway framing; reconstructing the upper roadway in the suspended spans; rehabing the approach spans, elevated structures and subway tunnels; and installing an intelligent transportation system.
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High-visibility hope
Roads & Bridges
March 2003
Skip Pendry, Contributing Author
When it was built in 1932, Cleveland's art deco-style Hope Memorial Bridge was hailed as one of the most beautiful bridges constructed that year. Since its last rehabilitation in the early 1980s, sections of the 3,285-ft-long bridge had deteriorated significantly. A key objective of the current rehabilitation project was to restore the bridge's appearance and preserve its beauty as an integral part of the cityscape--which would require stripping 1.8 million sq ft of steel to the bare metal and painting it with a three-coat system. A & L Painting LLC, Cleveland, was charged with this job.
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Pretty in Zinc
Roads & Bridges
September 2002
Andrew Gamble
Corrosion of rebar has proven to be one of the leading causes of premature failure of concrete structures. Moisture wicks its way into just about anything, and concrete is no different. Galvanized rebar is an economical and effective way to eliminate this problem.
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Cal-Poly coatings
Roads & Bridges
February 2002
Frank Limas, Dave Harris and Tripp Ishmael
A project to widen the San Mateo Bridge over California’s San Francisco Bay could guide future transformations of 20th century bridge spans to handle the traffic volumes of the 21st century. And it could demonstrate how advanced elastomeric coating technologies can be employed to waterproof precast concrete and protect it against corrosion.
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Watching paint dry
Roads & Bridges
November 2001
Barry Couts
Why bother to pay for certified independent inspection of bridge painting projects when the contractor offers to provide inspectors at no additional charge?
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