Australia’s longest single span shared path bridge takes shape

Seymour Whyte Constructions has successfully commenced the launch of steel trusses for the NSW Government’s new pedestrian and cyclist bridge over the Nepean River, which will be the longest single span bridge of its kind in Australia upon completion.

Seymour Whyte Constructions Regional Manager – Southern, Steve Lambert, said this significant milestone was the result of many months of meticulous planning and execution by the project team.

“Our team is continuing to work closely with the Client Roads & Maritime Services, steel fabricator Civmec and launching contractor Freyssinet to design, manufacture, transport and eventually launch all of the eight 25m x 8m sections of the main span truss.”

The specially designed truss segments were partially manufactured in the Hunter Region and transported safely across almost 200km under complex traffic management arrangements to the project site in Penrith, Western Sydney. The 8.2m wide loads were the widest ever transported through metropolitan Sydney.

Project Manager Greg Anderson explained that the bridge is being constructed over the heritage-listed Nepean River rowing course, the longest natural straight rowing course in Australia.

“To ensure the community’s continued enjoyment of the rowing course, we are working to deliver a 200m clear span bridge over the Nepean River,” he said.

“Our methodology of incrementally launching the main span truss from the river bank with the support of two temporary piers will enable us to construct the 200m bridge with no permanent piers in the water.”

The incremental launch of all eight sections will continue for the coming months. Once the main span truss is installed, the temporary piers will be removed. So far, four sections are onsite in various stages of construction. Two sections have been launched.

Upon completion in late 2018, the new bridge will provide a safe crossing for pedestrians and cyclists over the Nepean River and improve connections to existing and future shared paths, including the Great River Walk.

The truss segments were transported from the Hunter Region to Penrith via the Pacific Highway, M1 Motorway, Pennant Hills Road M2, M7, M4 Motorways and Mulgoa Road

 

The first truss bay being launched from Seymour Whyte Constructions’ temporary workshop on the banks of the Nepean River The first truss bay being launched from Seymour Whyte Constructions’ temporary workshop on the banks of the Nepean River

 

Aerial view of the temporary workshop and the temporary piers to support the incremental launch Aerial view of the temporary workshop and the temporary piers to support the incremental launch