What type of bridge structure comprising one or more towers with the deck supported by wires from each tower, has two types, the harp and the fan? Notable examples are the Millau Viaduct, Second Severn Crossing and the elevated sections of the Oresund.
Severn Bridge a long cable-stayed bridge, which crosses the border marked by the River Wye between England and Wales, south of Chepstow. It consists of a single large cable stayed section with two single-leg pylons supporting the bridge deck from the centre of the roadway. The deck is an orthotropic box girder similar to the Severn Bridge but has a different appearance as it has two sets of cable stays on each of two towers. Originally there was only one set of cable stays but these were replaced during the strengthening works. The Wye Bridge was built by Cleveland Bridge & Engineering
Severn Bridge the top of Aust Cliff to the first gravity anchorage of the old Severn Bridge. The roadway is then carried over the top of the concrete anchorage to the Severn Bridge. The Severn Bridge is located close to the former Aust Ferry. The bridge is a suspension bridge of conventional design, with the deck supported by two main cables slung between two steel towers. In 1966 the cables supporting the bridge deck were spun from of wire. The main cables are each made up of 8,322 individual wires. An unusual feature of the suspension cables carrying the deck is that