'Landmark' for Forth Replacement Crossing project
5 November 2012 Last updated at 15:13 GMT
The project to build a new bridge over the Firth of Forth has reached a "landmark moment", according to Deputy First Minister Nicola Sturgeon.
The Forth Replacement Crossing is the biggest transport infrastructure project in Scotland for a generation.
Engineers described it as the most critical stage of the building project, as any mistakes could have huge consequences.
Lorna Gordon reports.