Seymour Whyte was commended for the Narellan Road Stage 2B upgrade’s cable stayed pedestrian bridge over the Hume Motorway at the Australian Steel Institute’s 2018 NSW / ACT Steel Excellence Awards.
From 2016 to 2018, Seymour Whyte delivered the project in conjunction with the client Roads and Maritime Services and designer Arcadis. A major feature of the project was the new shared path bridge over the Hume Motorway, to provide connectivity for pedestrian and cyclists between Narellan and Campbelltown.
Seymour Whyte Project Manager Scott Calleja said the commendation award acknowledged the project team’s collaboration and innovation on a vital infrastructure project.
“The original construction methodology included the use of temporary towers in the median of the Hume Motorway for the erection of the steel deck segments, prior to installation and tensioning of the cables.
“This methodology would have required reduced speeds and roadwork zones on the Hume Motorway for up to 15 months during construction and disrupted traffic on a key transport link in greater Sydney,” he said.
“Working with RMS, Arcadis and a range of stakeholders,we developed an innovative design and construction methodology without the use of temporary supports in the median—a bespoke segmental cantilever erection methodology that enabled us to maintain existing speeds on the motorway, meet the construction program, and cause minimal disruption to one of Sydney’s busiest transport corridors.”