The Opposite Sphere, commonly known as Rostbollen, is a towering metal sculpture located at Notviksrondellen where Riksväg 97 intersects Luleå. The sculpture symbolizes Luleå as a steel city and is made up of 200 steel plates that were rolled in Borlänge, cut in Degerfors and assembled in Luleå.
The current sculpture stands 8 meters in diameter and weighs 17.5 tons. It is constructed from the weather-resistant plate quality Domex.
The artwork was originally built in snow and stood 4 meters in diameter. The current version in Notviksrondellen is double that height. It was constructed with the help of Mats Eriksson at Relitor Engineering AB at a cost of 1,000,000 kronor.
Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons
Written by Nik Frost
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