Bronx-Whitestone Bridge

As part of the recent rehabilitation of the Bronx-Whitestone Bridge, Nab removed existing stiffening trusses which were added to the bridge during the mid 1940s. The bridge, built in 1939, was designed and built without the trusses, used to stiffen the bridge.
Once the trusses were removed, Nab added wind fairings, wedge-shaped fiberglass panels. This was the first application of composite wind fairings on a major suspension bridge. Now completed, the Bronx-Whitestone Bridge has been restored to its sleek former beauty as designed by famed bridge builder, Othmar Ammann.

Seventy Second Street Subway Station Renovation

Nab Construction rehabilitated the 72nd Street Subway Station located on the upper west side of Manhattan. Highlights of this extensive 34 million dollar renovation and expansion project included a new station building, construction of two new elevators to provide access to both train platforms for customers with disabilities, and lengthening both platforms to accommodate more passengers.

Throgs Neck Bridge

Nab Construction recently rehabilitated the Throgs Neck Bridge which spans the Long Island Sound. The Throgs Neck Bridge, opened in 1961, provides a vital link between the Bronx and Queens.
Nab removed and replaced deteriorated sections of stringers, replaced floor truss battens, reinforced stringer webs and replaced lateral bracing stiffener angles. The steel repairs were performed with minimal interruption to the 150,000 vehicles that use the bridge daily. Careful planning was necessary since repairs required jacking the existing structure under live load.

6th Avenue IND Line Vent Plant Reconstruction

Nab Construction Corporation is currently reconstructing and expanding existing fan chambers on the Lower East Side of Manhattan. The primary goal of this project is to upgrade and modernize NYCT’s track ventilation/fan system for four different subway tunnels.

Park Avenue Viaduct

Built between 1892 and 1894, the Park Avenue Viaduct carries more than 530 trains a day into and out of Grand Central Terminal. Nab was General Contractor for the rehabilitation of the deteriorated mile-long, four-track-wide stretch from 110th to 132nd Street, and restoration of the passenger station at 125th Street.
The elevated track deck rested on three corroded north-south steel girders. Nab designed, fabricated, and bolted onto the girders, steel reinforcement plates that fit each weakened area.