Known locally as 'the Coathanger', Sydney Harbour Bridge is the world's tallest and widest steel arched bridge. Connecting the northern suburbs with the city centre, it brought together a city divided not just by water but by cultural differences. Rob explores the story of this engineering masterpiece, whose builders utilised the very latest technologies and techniques of their time, but which came at a cost.
A symbol of the Industrial Revolution, the elegant Iron Bridge over the river Severn in rural Shropshire was the world's first bridge to be constructed entirely from iron. Rob reveals the difficulties encountered in building it, the scepticism of contemporary engineers, how it inspired Thomas Telford to design the Pontcysyllte Aqueduct and the bridge's role as a catalyst for the birth of a civil engineering.
The US-93 Hoover Dam Bypass bridge south of Las Vegas, Nevada, USA. This amazing feet of modern engineering spans Black Canyon downstream of the dam and the Colorado River some 900 feet below. In our modern era we almost never get to see mega structures being built but here's one less than an hour from the Las Vegas strip. This type of construction has never before been attempted on this scale. This is a concrete gravity arch bridge. But there's no way to support the arch from below with scaffolding or frame work as was done on the PCH (Bixby Bridge). A suspension system has been put in place to hold the arch segments until the arch can be completed (Sept 2009). Once the arch is complete and cured, the cables and towers will be removed and the roadway of US-93 will be brought out piece by piece completing the bridge. 153554b96e