Opened in August 2017, the Queensferry Crossing is one of the most striking engineering icons of the twenty-first century. The crossing is both the UK’s tallest bridge and the world’s longest three-tower, cable-stayed bridge.
- Year: 2017
- Location: Scotland
- Client: Forth Crossing Bridge Contractors
Cleveland Bridge was responsible for the approach viaduct south, where the scope of supply included fabrication and site assembly of two lines of trapezoidal box girders, each approximately 550m long and weighing in total 5000 tonnes. For the north viaduct, the scope was for 80m long twin trapezoidal boxes, weighing approximately 500 tonnes of steel.
Approach viaduct south
Bridge design life in years
Each box section in weight
Cleveland Bridge fabricated two lines of trapezoidal box girders, then assembled the pieces running parallel to each other on site, using approximately 5000 tonnes of British-made steel for the Approach Viaduct South. The Approach Viaduct North included the fabrication and site assembly of two lines of trapezoidal box girders running parallel to each other.
Early 2016 saw the completion of the launch of the Approach Viaduct North. In one of the most technically challenging operations of its type ever performed, the launch involved shifting the massive steel and reinforced concrete structure, with a launch weight of 6,300 tonnes, some 230m out towards the North Tower.
The praised aesthetic of the crossing, the speed of its construction and its high functional specifications are all dependent on steel, and the skill of the fabricators and engineers who worked on it. Queensferry Crossing approach viaduct south received a special commendation at the 2018 Structural Steel Design Awards.