Construction Journal

March 9, 2020

Steel for the starry sky: The substructure is assembled

Unterkonstruktion Sternenhimmel MUI Februar 2020 © A. Reetz-Graudenz

So that the starry sky at the Muesumsinsel station can light up soon the required substructure is currently being installed. It consists of a total of almost 600 steel arches. The arches have been manufactured in a factory in Hoppegarten since December last year. A total of six work steps are required to weld, drill and shape the individual elements of the substructure. This means that the individual arches are combined into assemblies, each consisting of two to five arches. In addition, the arches are fitted with fibre optic cables at the factory, through which the optical fibres are then routed. The steel is transported via the rails: From the U2 via the Klostertunnel to the U5 - stop Museumsinsel! On site, the assemblies are suspended by crane and crank carriage from the already installed holding rods above the track, folded to the ceiling and bolted together with over 1,500 angle sections.

 

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