Specifications
The bridge's main span, the length of road deck between its two main towers (pylons), measures 450 metres (1,476 ft). This together with two 181 m outer spans either side gives the bridge an overall suspended road deck length of 812 metres (2,664 ft) metres. The outer spans are also supported underneath by concrete pillars.
Connecting with the bridge's road deck joints are the approach roads, elevated on concrete viaducts. The northern elevated approach is 1,052 m (3,451 ft) long, while the southern elevated approach is 1,008 m (3,307 ft) long. The suspended bridge deck when combined together with the approach viaducts forms a total elevated stretch of road 2,872 m (9,423 ft) long.
The road deck of the bridge is supported by cables attached to 84 m (276 ft) metre high steel pylons rising above the road deck, standing on top of 53 m (174 ft) metre high concrete piers. These give the bridge an overall height of 137 m (449 ft).
The highest point of the road deck rises 65 m (213 ft) above the river, giving a clearance below to shipping of 57.5 m (189 ft) to accommodate all but the largest ocean-going cruise liners (for example the MS Freedom of the Seas is 63.7 m tall above the waterline).
Read more about this topic: Queen Elizabeth II Bridge