The structure at Mascot is part of the New South Wales (NSW) government’s US$1.9 billion Sydney Gateway project.
Premier Dominic Perrottet said: “This is a transformative project that will get people to and from Sydney Airport faster, supporting more than 4,000 construction and manufacturing jobs, while modernising our road network.
Each of the pier caps, or headstocks, weighs more than 90t. They each stand more than 6m tall and will support a flyover connecting motorists to Sydney Airport.
Minister for infrastructure, cities and active transport Rob Stokes said: “Businesses in Western Sydney and Regional NSW have been integral to this project, with the headstocks manufactured in Picton using steel made in Western Sydney, all to support 34-metre long steel and concrete girders made in Maitland.”
Minister for metropolitan roads Natalie Ward said Sydney Gateway will have the capacity to carry 100,000 vehicles daily and slash travel times to and from the airport when it opens to traffic at the end of 2024.