Queensferry Crossing

Queensferry Crossing

2017 - Queensferry Crossing

  • 2 x 650m main spans
  • 122 bridge deck sections up to 16m long, 30m wide
  • Centre tower 210m, South and North towers 202m
  • Centre tower is on the Beamer Rock

The Queensferry Crossing is a road bridge currently under construction in Scotland. The bridge is due to open in May 2017. It will carry the M90 motorway across the Firth of Forth and is part of the Forth replacement crossing project.

It is the third bridge to cross the Forth at Queensferry alongside the iconic Forth Bridge and Forth Road Bridge. The Forth Bridge was a marvel of the Victorian era, designed and engineered by Benjamin Baker and John Fowler, and built by William Arrol. it is the world's second-longest single cantilever span bridge and still carries 60,000 trains across the Forth each year.

The Road Bridge transformed the journey from north to south when completed in 1964 and was the longest-span suspension bridge outside the United States. Five decades on, it carries 24 million vehicles across the Forth every year, more than twice the amount of traffic it was designed for.

The importance of the link to the Scottish economy was demonstrated in late 2015 when the bridge had to close for emergency repairs to truss end links causing major disruption to the travelling public.

The new bridge is a vital link for the Scottish economy and forms the centrepiece of a major upgrade to the cross-Forth transport corridor linking Fife, the north and the east of Scotland to Edinburgh and the south.

Forth Crossing Design Joint Venture

Transport Scotland examined various options for new bridges or tunnels across the Forth in 2007. Jacobs Arup recommended a cable-stayed bridge to the west of the Forth Road Bridge, as the fastest and most cost-effective option. The new cable-stayed bridge is 'the largest infrastructure project in a generation in Scotland.' construction began in 2011 and in 2013, a public vote chose the name 'Queensferry Crossing'.

Bridge construction

The Queensferry Crossing will be the longest (2.7 kilometres /1.7 miles) three-tower, cable-stayed bridge in the world, as well as being the largest to feature cables which cross mid-span. The innovative design provides extra strength and stiffness, allowing the towers and deck to be more slender.

The bridge deck is made up of 122 composite steel/concrete sections. They were transported by barge from the nearby Rosyth marine dock to the bridge and lifted into place.

The deck sections are hoisted from the Firth to road level, erected out from each tower by cantilever and held by cables.

Opening in 2017

The bridge is recognised as an outstanding example of bridge technology at the beginning of the 21st century.

It is a three-tower cable-stayed bridge with two 650m central spans and will have the world's longest composite deck for a bridge of its type.

Facts

Queensferry Crossing
Under construction 2011-17
2.7km long with 2x650m main spans

Effect

This vital link connects the north and east of Scotland to the south

Challenge

High winds and a 2.7km crossing

Solution

Three-part cable-stayed bridge with 'fan' cables