Stolma Bridge

The Stolma Bridge () is a road bridge over the Stolmasundet strait in Austevoll municipality, Vestland county, Norway. It connects the islands of Stolmen and Selbjørn. 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 prestressed concrete box girder bridge 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.