Another substantial step forward is represented by the completion of the facade top truss. The tube, almost 900mm in diameter, features 10 sections welded together on site, and it is completly three-dimensional. The overall tolerance was set to +-50mm. This amazing achievement was possible thanks to only two welders!
Welding close-up, between section 4 and five at + 12 meters from the ground level, showing the degree of accuracy achived on site.
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