The New Bay Bridge is a large civil engineering project taking place between the years 2002 and 2013. The aim of the project was to replace two segments of the Bay Bridge vulnerable to eathquakes by a new structure designed to withstand seismic efforts.

For that project, Dextra was involved on two segments of the renovation project: the approach to Bay Bridge on the San Francisco side, and the Eastern segment from the Island of Yerba Buena to Oakland.

Dextra supplied for this project its Bartec Headed Bar systems. Headed Bars are an anchor disc mounted on the end of a rebar previously prepared for the Bartec system.

The use of Headed Bars provides an smart and compact alternative to long rebar hooks in areas where the reinforcement is particularly congested. Unlike hook bars, Headed Bars are particularly easy to install, as end anchors can just be screwed onto the reinforcement at a later stage, after the reinforcement is installed.

For the approach to the Bay Bridgee in San Francisco and the Yerba Buena Eastern Segment, Bartec Headed Bars were used for the shear reinforcing of the column foundations, as well as in the bridge hinges.

The Bartec Headed Bars solution is approved by CALTRANS, the California Department of Transportation, for all imperial bar size #3 to #18. and is also certified by the ICC-ES.

The Viaducto del Manglar project is a 5.3 km bridge project spanning over the Ciénaga de la Virgen (swamp), north of the City of Cartagena, Colombia. The project aims to reduce traffic congestion when exiting the city in the Zona Norte (North Area).

The viaduct, which aims for opening in 2018, is part a longer highway project linking the city of Cartagena with the city of Baranquilla.

For this project in Colombia, Dextra has been supplying contractor Rizzani de Eccher with Rolltec rebar couplers and Headed Bars. Rebar preparation operations has been performed by Dextra distributor in Colombia.

Headed Bars were used in precast caissons, installed below the bridge girders, as a way to reduce steel congestion in the heavily reinforced steel cages.

For more information about Dextra solutions in Colombia, please contact our regional Latin America office.
Copyright pictures: Consesion Costera

The 3rd bridge over the river Mandovi in Goa is an iconic bridge that connects Panaji in Tiswadi Taluka and Porvorim in Bardez Taluka in between the existing two bridges to ease traffic congestion along this route. It was declared open on January 27, 2019.

As one of the longest cable stayed bridges in India, the 4-lane, 21m-wide, 620m-long continuous span, 3.6 km Mandovi River Cable Stayed Bridge adds architectural beauty to Panaji, standing tall 70m above sea level with the central concrete pylons spaced at 150m, supported by 88 cables on a single plane, harp type cable stay arrangement.

Dextra supplied 1,170 sets of fully-threaded post-tensioning bar systems in diameter 25, 32, 40, 50 and 75mm, in grade 830/1030 for use in various applications.

The Valenciennes Bowstring is a 2-kilometer bridge construction project that will connect the Saint-Saulve roundabout with the Bruay-sur-l’Escaut roundabout (North). It features a 76-metre-long bowstring bridge, a double-girder engineering structure, a pedestrian footbridge, and a wildlife passage.

Dextra supplied a tension rod system as a hanger for the bowstring arch bridge on the bypass, in collaboration with its local partner Freyssinet, to assure the structure’s stability.

The tension rod system is not only trusted for its high performance, but it also comes with different parameters such as design load, surface finish, and corrosion resistance, to fit all project technical and aesthetic requirements.