Estados Unidos

Tappan Zee Bridge

Project description

The New Tappan Zee Bridge, also known as the New NY Bridge and officially named the Governor Mario M. Cuomo Bridge after the late former governor Mario Cuomo, is a twin cable-stayed bridge built to replace the original Tappan Zee Bridge over New York's Hudson River. The $4.0 billion bridge structure was completed in June 2018, and contains a total of eight lanes for vehicular traffic as well as a shared-use bicycle and pedestrian path.

Additionally, an allowance has been made for the future construction, between the two structures, of a rail line to assist with trans-Hudson public transportation.

The Tappan Zee Bridge is a critically important transportation link in the New York Metropolitan Area, with over 138,000 vehicles crossing it each day.

mageba scope

mageba North America Corp. supplied all 23 of the TENSA® MODULAR (type LR) expansion joints required for the new Tappan Zee Bridge, in fully continuous lengths, the longest of which is 105 feet. The largest joints are type LR18, each with 18 individual movement gaps which accommodate total longitudinal movements of up to 54 inches (1.4 meters).

mageba also supplied 16 RESTON®STU shock transmission units (STU, also known as lock-up devices), with lock-up capacities of 800 kips (3550kN) and pressure release valves rated for 1600 kips (7100 kN). Each STU will weigh 13,500 lbs (6150 kg), and will be individually tested to ensure that the performance meets the required design criteria.


Rendering picture of TENSA MODULAR expansion joint


Installation of a TENSA MODULAR expansion joint type LR18


TENSA MODULAR expansion joint type LR18 during an inspection in July 2021


Truck is about to pass the 18 gaps expansion joint


Bottom view of a modular expansion joint


July 2021, structural engineer from mageba is inspecting the expansion joint that was installed in 2017


Detailed inspection of the expansion joint


Installed shock transmission unit


3D view of a RESTON-STU shock transmission unit

Data chave


TENSA-MODULAR LR expansion joints, RESTON-STU shock transmission units


Joints designed for movements of up to 54 inches (1.4 meters), STU capacity 800 kips




New York


Cable stay Bridge


3.0 miles (4,800 m)


Fluor Corporation, American Bridge Company, Granite Construction, Northeast & Traylor Bros