The biggest Tee-roff beams ever manufactured in Western Australia have been installed at a key METRONET site – the Thornlie-Cockburn Link.
The 50m beams were manufactured by local company Georgiou Group at its precast yard located in Hazelmere, supporting local jobs.
The beams have been installed on the new Ranford Road Bridge that is part of the new Thornlie-Cockburn Link.
The new bridge will be longer and higher to future-proof the rail corridor and will have six general traffic lanes (three in each direction), bus lanes and a shared path on each side.
“This new structure will help future-proof the road network ahead of a projected increase in demand for access to surrounding businesses, industrial areas and of course the future Thornlie-Cockburn Link train station at Ranford Road,” WA Transport Minister, Rita Saffioti, said.
“Not only are they the biggest Tee-roff bridge beams ever built in Western Australia, they were manufactured locally in Hazelmere.”
Each beam is made of 14,000kg of reinforced steel, 120 stressing tendons and 73m³ of concrete.
They each weigh 197 tonnes, and took ten workers and two concrete pump trucks three days to manufacture.
Seven of the ten beams have been installed, with the last three to be installed as the project progresses.
Tee-roff refers to a specially-designed beam developed in Victoria and first used in WA on the Northam Bypass project in 2001.
Tee-roff beams have become the preferred superstructure form for bridges with a range of 20‑45m as they enable a longer span, whilst using less material and reducing overall bridge load.
The WA Government has nine METRONET projects under construction, supporting local jobs and local businesses.
“More than 1,680 local jobs will be supported through the Thornlie-Cockburn Link project over the next few years, while hundreds more will be created on other major projects in our southern suburbs that complement this project including the North Lake Road Bridge,” Ms Saffioti said.
When the 17.5km Thornlie-Cockburn Link is complete, passengers using Ranford Road Station will be able to travel to Perth in about 29 minutes.