The Normandy Bridge, spanning the Seine estuary, was the world's largest cable-stayed bridge when opened in 1995, with an 856 m central span.
Normandy Bridge's unique design
The Normandy Bridge, spanning the Seine estuary between Le Havre and Honfleur, features a main span of 856 meters between its two towers. This span includes a central 624-meter steel box, with 116 meters of prestressed concrete on either side.Construction and inauguration
The bridge was inaugurated on January 20, 1995, by Prime Minister Édouard Balladur. Its construction began with the laying of the first stone by Jacques Chirac on March 22, 1988.World record at opening
At the time of its opening, the Normandy Bridge was the largest cable-stayed bridge in the world. Its central span nearly doubled the previous record held by Canada’s Alex Fraser Bridge, which had a central span of 465 meters.Towers and dimensions
The bridge's two inverted Y-shaped towers rise to 214.77 meters, approximately two-thirds the height of the Eiffel Tower. Including access viaducts, the total length of the bridge is 2,141 meters.Design to manage weight and wind
The bridge uses a mixed deck principle, combining steel and concrete to address weight constraints. The steel box in the center reduces the load on the cables, while the concrete deck near the towers offers greater rigidity and wind resistance.Material choices and construction
High-performance concrete was used in highly stressed parts such as the towers and deck. The bridge's deck is supported by 184 cables arranged in two layers, with each cable removable without interrupting traffic. Wind was a major challenge during construction, with gusts reaching 180 km/h.Aerodynamic features
To ensure aerodynamic stability, the bridge features a profiled deck, lateral cables, and "needle" anti-vibration cables and dampers at the base of each tower. The construction took seven years, from 1988 to 1995, carried out by a consortium of seven companies.Deck layout and weight
The bridge’s deck is 23.60 meters wide, accommodating four vehicle lanes, two bike paths, and two pedestrian lanes. The steel box that spans the Seine is 59.12 meters long and weighs about 5,600 tons, roughly the weight of 900 African elephants.Subtle transition and views
The transition between the steel and concrete sections is not noticeable to drivers, who cross the central section in less than 30 seconds at 90 km/h. Pedestrian paths and bike lanes provide the best views of the inverted Y towers, cable layers, and material change in the middle of the span.Later records
The Tatara Bridge in Japan later surpassed the Normandy Bridge as the longest span for a cable-stayed bridge, holding the record until the end of the 1990s.
