The project is the first UK bridge to use high strength ‘S460W’ weathering steel. Using this stronger grade of steel enabled the COWI design team to reduce the total material quantity by 15%, resulting in a more sustainable structure
The reduced quantity of steel reduces associated carbon emissions from manufacturing and transport. The use of corrosion-resistant weathering steel means the steelwork does not require painting, a further environmental benefit.
The final two crane lifts over the River Severn were achieved at a radius of 80m with the crane boom extended to its maximum length of 180m.
COWI won the work on the project with Alun Griffiths Contractors Ltd, as part of an ECI scheme, to design the three-span composite road bridge, as well as the geotechnical design of the road embankment, retaining walls and slope stabilisation measures.
The bridge has a total length of 205m and forms part of the Worcester Southern Link Road project, which will convert the A4440 from single to dual carriageway, relieving traffic congestion in the area.
The steelwork for Carrington Bridge was fabricated and installed by Cleveland Bridge.
In addition to designing the structures, COWI was also responsible for all of the geotechnical design of the project, including earthworks.
Completion of the bridge is planned for spring 2021.
Reducing risk and tackling issues
Andy Sloan, managing director / senior vice president, COWI, said: “We are delighted to have completed the installation of the steelwork for the bridge in less than two weeks.
“The site has been challenging with regular flooding being an issue and steep slopes which have given us reduced access for construction works, but our team have tackled these problems head-on, and we are thrilled with the outcome.”
