The Stolma Bridge ( no, Stolmabrua) is a
road bridge
A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually somethi ...
over the Stolmasundet
strait in
Austevoll
Austevoll is a municipality and an archipelago in Vestland county, Norway. It is located in the traditional district of Midthordland in Western Norway. The administrative centre is the village of Storebø on the island of Huftarøy. Other villa ...
municipality,
Vestland
Vestland is a county in Norway established on 1 January 2020. The county is located in Western Norway and it is centred around the city of Bergen, Norway's second largest city. The administrative centre of the county is the city of Bergen, whe ...
county,
Norway
Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and t ...
. It connects the islands of
Stolmen
Stolmen is an island in Austevoll municipality in Vestland county, Norway. The island lies in a large archipelago just north of the Selbjørnsfjorden. The island of Selbjørn lies to the east, the islands of Huftarøy and Hundvåko lie to the ...
and
Selbjørn
Selbjørn is an island in Austevoll municipality in Vestland county, Norway. The island is the second largest in the municipality (after Huftarøy). Most of the population lives along the northern and eastern coastlines of the island. The comm ...
. The bridge is long and has three spans, the largest of which is . The construction cost was .
The bridge was opened for traffic 14 November 1998 and is part of County Road 5138. The main span was the world's longest cantilever box-girder span until it was surpassed by the
Shibanpo Second Yangtze River Bridge in
China.
Bridge design
The bridge is a
cantilevered
A cantilever is a rigid structural element that extends horizontally and is supported at only one end. Typically it extends from a flat vertical surface such as a wall, to which it must be firmly attached. Like other structural elements, a cant ...
prestressed concrete
Prestressed concrete is a form of concrete used in construction. It is substantially "prestressed" (Compression (physics), compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. Post ...
box girder bridge
A box girder bridge, or box section bridge, is a bridge in which the main beams comprise girders in the shape of a hollow box. The box girder normally comprises prestressed concrete, structural steel, or a composite of steel and re ...
using low density concrete, with a vertical clearance of . To achieve its record length for box girder construction, the hollow concrete box girders are wide and taper from inbox beam depth over the piers to in the center of the span. To reduce its weight, the center of the main span is constructed of high-strength low-density concrete with a density of . The short end spans which cantilever the main span are ballasted with gravel.
See also
*
List of longest cantilever bridges
This list of cantilever bridges ranks the world's cantilever bridges by the length of their main span. A cantilever bridge is a bridge built using cantilevers: structures that project horizontally into space, supported on only one end.
Completed ...
*
List of bridges in Norway
This is a list of bridges and viaducts in Norway, including those for pedestrians and vehicular traffic.
Historical and architectural interest bridges
Major road and railway bridges
This table presents the structures with spans greater than ...
References
Road bridges in Vestland
Austevoll
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