PaintSquare.com
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site

 

Advertisement

PaintSquare


Coatings Industry News

Main News Page


Caltrans Defends Bay Bridge Steel Quality

Friday, September 1, 2017

More items for Quality Control
More items from North America

Comment | More

As the final structural work on the new San Francisco-Oakland Bay Bridge eastern span is finished and the demolition of the old span’s last remaining piers commences, officials are addressing concerns about the quality of the steel used in the new bridge’s construction.

According to local reports, California Department of Transportation chief engineer Brian Maroney told reporters Tuesday (Aug. 29) that he was not concerned about tests of some discarded scraps that showed yield strengths far lower than those associated with 50 grade steel, which was required for the job.

Bay Bridge eastern span
Dllu, CC BY-SA 4.0, via Wikimedia Commons

The $6.4 billion Bay Bridge eastern span replacement opened in 2013, but has been subject to structural repairs in the years since.

“It’s to be expected,” he told the San Jose Mercury-News. “The inside may have a lower yield strength, but it’s just as strong in ultimate strength.”

The pieces of steel that were tested were reportedly from poorly welded plates, and Maroney said the scraps were tested close to the welds, where the heat may have affected the yield strength in a limited area. Maroney also told reporters that other testing had confirmed previously that the steel used on the project was of the proper quality.

New Bridge, Repeated Repairs

The $6.4 billion Bay Bridge project was nominally complete in 2013, when the span opened to traffic, but structural repairs continued for years thereafter, adding millions of dollars to the overall cost of the job.

Months before the bridge was opened, more than 30 of the anchor rods were found to have broken. In early 2014, an inspection found hundreds of leaks in a supposedly watertight steel chamber supporting the bridge's suspension span. And in 2015, concerns were raised about corrosion risks on the bridge’s main suspension cable.

Last week, Caltrans announced that the implosion of the final remaining piers of the old Bay Bridge eastern span will take place over a series of weekends in September and October.

The old eastern span of the Bay Bridge was replaced due to concerns about its safety under earthquake conditions; part of the span infamously collapsed during 1989’s Loma Prieta earthquake, killing one driver. While the western span—a suspension bridge reaching from San Francisco to Yerba Buena—was retrofitted for seismic durability, Caltrans determined that the eastern span should simply be replaced.

   

Tagged categories: Bridges; Quality control; Steel

Comment Join the Conversation:

Sign in to our community to add your comments.

Advertisements
 
KTA-Tator, Inc. - Corporate Office
 
KTA-Tator EH&S Services
 
• Ambient & Worker Exposure Air Monitoring
• Safety & Health Program Development
• Lead Paint Assessments
& Specifications
• Health Hazard & Jobsite Safety Assessments
Call 1-800-532-3633
 

 
HoldTight Solutions Inc.
 
Full Surface Protection for Up to One Year
 
HT 365 is a preservation, single component, anti-corrosive coating, a water displacing agent, a lubricant, and a penetrating fluid. It creates an imperceptible thin-film coating that offers excellent salt contaminant and humidity protection. Contact your HoldTight® representative or visit Holdtight.com for more information.
 

 
SABRE Autonomous Solutions
 
Productivity
 
Personnel are free to do other tasks while the ALPHA1 does the “dirty work”.
 

 
SAFE Systems, Inc.
 
SAFE Systems'
Blast Lights &
Deadman Switches
 
Halogen or LED blast lights available with our NEW urethane bumper. Switches available in many colors for color coding your hoses.
 

 
Fischer Technology Inc.
 
TSA Coatings on Stainless Steel
 
Fischer’s Phascope PMP10 and ESD20TSA probe are incredibly accurate and easy to use.
 

 
DeFelsko Corporation
 
PosiTector SST Soluble Salt Tester
 
Measures the concentration of soluble salts on metal surfaces. Use with all Bresle patch types including the reusable, adhesive-free PosiPatch.
 

 
Jotun Paints Inc.
 
Jotun Jotachar 1709
 
Mesh-free passive fire protection epoxy designed to protect against hydrocarbon pool fire scenarios for up to four hours as defined in the ANSI/UL1709 standard.
 

 
Sidewinder/Persyst Enterprises, Inc.
 
Sidewinder Model M2
 
Load our Refrigeration Machine Distiller Reclaimer with dirty solvent, press the button, you're done. You will have clean gun wash and cleanup solvents, ready for reuse.
 

 
Blastox/The TDJ Group, Inc.
 
Blastox® - One Step Lead Abatement
 
Sandblast additive delivered to jobsite pre-blended to eliminate hazardous abrasive wastes. Why mix, meter or apply at the job-site? Blast with ease and
Let your painters paint!
1(800)-252-7869
 

 
Norton Sandblasting Equipment
 
Norton Sandblasting Equipment
 
We are a premier stocking distributor for the leading manufacturers of surface preparation equipment, industrial dust collection, vacuums and more.
 

 
 
 

Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy Policy (Updated 5/24/2018)   |   Terms & Conditions   |   Support   |   Site Map   |   Search   |   Contact Us