The process of lifting the first 800 tonne sections of deck into place on the crossing across the Forth of Scotland has now begun.
Last year, the initial sections were installed on each of the towers, supported by large temporary trestles.
The deck segments have since been welded together and jointed in place, with the concrete deck added.
Recently, the first stay cables have also been fitted and tensioned to lift and support the weight of these initial sections.
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The announcement marks a significant period for Scotland's transport network.
The start of work follows the official opening of the Borders Railway, along with construction work commencing on the A9 dualling project.
Infrastructure Secretary Keith Brown, said it was a "momentous week" for infrastructure projects right across Scotland.
Speaking on the Queensferry Crossing project, he said: "This is the start of some spectacular engineering and as work progresses with further sections of deck lifted and cables attached, it will become even more of a remarkable sight.
"While the weather has been poor this year, especially wind conditions on the Forth, this is further evidence of the great job the workforce is doing to make such progress on the new bridge."
The 2.3km bridge will be opened in December 2016.
(LM)
