Protective Coatings Throgs Neck Bridge TN-82B

Protective Coatings Throgs Neck Bridge TN-82B

The Throgs Neck is a suspension bridge with a ribbed orthotropic deck structure supported by subfloorbeams that rest on a superstructure. LiRo provided resident engineering services for repairs to the steel components of the approach spans; blast cleaning and coating application at the Bronx approach viaduct; and spot coating application at the Queens approach viaduct. Steel work included repair and replacement of deck rib bearing plates, subfloorbeams, stringers, and lateral bracing gusset plates. Access to the underside of the structure was provided by a full work platform (Safespan), installed under the Bronx Approach viaduct, and partial platforms installed under the Queens Approach viaduct. As the blast cleaning operation progressed over the length of the bridge, Class 1A containment enclosures were erected at each individual span to protect the waterways and island below. Floating barges were utilized for blast equipment and storage of coating materials. Careful coordination was required to ensure that operations at the State University of New York Maritime College, located below the bridge, and access to navigation channels in the Hammonds Cove area, were not affected by the work.

Services Provided

Resident/ Construction Engineering & Inspection

Protective Coatings Inspection