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Bridge Coating Systems: Selecting and Sourcing

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CA Seeks Bids for $2.3M Bridge Painting

Monday, October 15, 2012

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Having just let a project to relocate a suspended deck system on the San Diego-Coronado Bridge, California transportation officials are now inviting bids to paint four spans on the bridge—a job estimated at more than $2 million.

The California Department of Transportation accepted bids Aug. 28 to move a Caltrans-owned suspended deck system from one span to another on the bridge, also called the Coronado Bridge, in San Diego, CA.

 The project involves cleaning and recoating four spans of the bridge.

 Coronado Visitor Center

The project involves cleaning and recoating four spans of the bridge.

The project involves removing about 20,000 square feet of scaffolding from Span 22 and installing about 15,000 square feet of scaffolding on Span 14. The deck system, manufactured by Safe-Span, will be used as a component of a Class 1 containment system (SSPC-Guide 6).

Abhe & Svoboda, Inc. of Prior Lake, MN, was the apparent low bidder with a bid of $234,750. 

Painting the Steel

Bids will be opened Nov. 1 for the painting project, which involves cleaning and recoating structural steel surfaces on a 647.25-foot-long section (spans 26-29) of the bridge. The engineer’s estimate is $2,320,000.

The steel, including rocker bearings, catwalk, and bridge crane rails, will be steam-cleaned or pressure-washed to remove gloss and deteriorated coatings. The steel will be tested for soluble salt (SSPC-Guide 15) with chloride remediation as needed.

Corroded surfaces and all crane rail surfaces will be abrasive blast-cleaned to a Near White finish (SSPC-SP 10) and coated with an inorganic zinc-rich primer. All steel surfaces will be finished with two coats of waterborne paint.

The existing coatings contain lead, cadmium and zinc; Class I containment according to SSPC-Guide 6 is required. SSPC-QP 1 and QP 2 certifications are also required.

About the Bridge

The curved, five-lane 11,179-foot-long prestressed concrete/steel girder structure connects the cities of Coronado and San Diego over San Diego Bay. It reaches a maximum height of 200 feet, allowing the U.S. Navy ships that operate out of the nearby Naval Station San Diego to pass underneath.

The bridge costs $47.6 million to build and opened in 1969 to mark the 200th anniversary of the founding of San Diego.

The bridge was retrofitted in 1976 with special rods as a preventative measure against potential earthquake damage. In late 2011, Truesdell Corporation of California Inc., of Phoenix, AZ, was awarded a $397,397 contract to clean and seal about 346,560 square feet of concrete bridge deck surfaces using 4,335 gallons of high molecular weight methacrylate penetrating treatment.

Caltrans employs a four-person crew that works year-round to protect steel on the bridge from its corrosive ocean environment. The bridge is comprised of 13,000 tons of structural steel that is painted blue, intended to blend well with the bridge’s vibrant sky and sea backdrop.

Reported by Paint BidTracker, a construction reporting service devoted to identifying contracting opportunities for the coatings community. Visit us on Facebook!

   

Tagged categories: Abhe & Svoboda; Abrasive blasting; Bidding; Bridges; Containment; Contract awards; Lead paint abatement; Paint BidTracker; SSPC; Waterborne coatings

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