Motorists travelling West on the Bass highway between now and May are likely to see “quite a sight”.
Oversize, slow-moving trucks carrying more than 2500 tonnes of steel girders are expected to cause periodic traffic interruptions.
The first load will hit the highway this weekend.
The large bridge beams have been specially constructed by Hayward Steel for two separate infrastructure projects in Sydney and Victoria.
The beams will be transported on about 40 scheduled trips from Breadalbane to ports in Burnie and Devonport.
Crisp Bros and Haywards managing director Steve Edmunds said the girders were “not an everyday project” and were about nine months in the making.
“This is definitely one of the larger bridge projects we have worked on,” he said.
“There is 1600 tonnes of steel for the Chandler Highway upgrade in Melbourne and another 1000 for the WestConnex in Sydney.
“It is certainly a lot of steel for a workshop of our size to put out.”
Friday’s load is scheduled to depart Breadlabane at noon and 10am on Saturday, with each truck accompanied by up to five support vehicles.
More details of the remaining loads will be advised on the Transport Road Closures and Delays website.