e-mosty June 2017: Osman Gazi B. US Suspension. Hålogaland B. e-mosty June 2017: Suspension Bridges | Page 10

Facts about the bridge
 The two suspension cables that hold up the main span of the bridge have a diameter of
475mm in the main span, whereas the main cable diameter of the southern back span and
northern back span are greater at 484mm and 492mm, respectively
 The main cable is 1,761 m long.
 The navigation clearance in the Rombak fjord will be 40m x 200m (width x height).
 The bridge deck of the 1,145m long main span is an 18.6m wide steel box girder. The bridge
deck on the back spans (Viaducts) comprises a 15.4m wide concrete girder with cantilevered
flanges.
 The bridge deck width allows for a 9.5m wide dual lane roadway and a 3.5m wide combined
walkway and bicycle path.
 The speed limit will be 80 kph.
2. THE DESIGN
2.1 General Conditions
The fjords in Norway are surrounded by high and
steep coasts. They are also very deep. The traffic is
relatively low so the bridge carries just a single traffic
lane in each direction and 3.5m wide walkway.
The main span steel box girder is 18.6m wide.
Concrete viaducts are 15.4m wide, with 5 piers 12 to
30m tall. The Viaduct from Karistranda is 244m and
the viaduct from Øyjord is 152m.
The viaducts, towers and anchorages for main cables
are concrete. The bridge is constructed using
35,000m 3 of concrete.
Viaduct Karistranda
Viaduct span: 57–67–67–53 m
Viaduct Øyjord
Span 49-58-45 m
Figure 3: Elevation
Figure 4: Plan
2/2017