© B2 ArchiveTriangle Link Bridge 2001
Triangle Link Bridge 2001
The Bridge
The Triangle Link fulfilled the desire to have a fixed link between the islands of Stord and Bømlo in Norway. Two of the three bridges were suspension bridges and the suspended main cable work was engineered and erected by Bill Brown’s firm, Brown Beech, and the Norwegian contactor, HMV.
Bill Brown devised the method of cable spinning to construct the main cables of each of the suspension bridges. The cables were spun using Bill’s innovative air-spinning technique with controlled tension. A carrier wheel shuttled forward and back from one anchorage up over the towers to the far anchorage. The cables consist of seven bundles, each with 420 individual 5mm wires.
The spinning of the main cables for the two bridges was completed in less than two months and its success was estimated to have given a cost saving of NOK 10million (£1million).
Triangle Link Bridge
Three bridges connecting Norwegian islands
Key Facts
Consists of three bridges
Connects Stord and Bømla Islands to the mainland
Two are suspension bridges with Severn-type single box girder
Location
Hordaland and Bergen, Norway
From Stord to Bømlo, and to the mainland at Sveio
Designers / Engineers
Design: Aas-Jakobsen
Cable: Brown Beech (B2)
Description
Stord Bridge main suspended span: 677m
Bømla Bridge main suspended span: 577m
Spissøy Bridge 283m beam bridge
Main contractors
Triangle Contractors, a joint venture between NCC and HBG Steel Structures
Construction
Stord Bridge opened 28 December 2000
Bømla Bridge opened 30 April 2001
Spissøy Bridge opened 28 December 2000
Other long-span bridges
