A ViaCon steel solution installed with only 72-hour over rail-work to keep a heavily trafficked road moving.
The Challenge
As part of the new four-lane E6 corridor through Lillehammer, Norway, a new railroad overpass at Storhove–Øyer was required to carry the E6 over an active railway with minimal disruption. The project demanded an accelerated installation during a tightly timed rail possession, while meeting stringent road and rail authority requirements. ViaCon Norway was engaged as a total sub‑contractor to deliver concept and detailed design, authority approvals, fabrication, and installation planning alongside the general contractor.
The Solution
Working in close collaboration with AF Anlegg AS, Sweco, and Norconsult, ViaCon engineered a corrugated steel soil–steel structure, pre-assembled in nine transportable sections sized for constrained site access and the lifting capacity of a 450 ton crane operating from two positions. The plan synchronized demolition of the existing concrete bridge, installation of new concrete foundation elements, and placement of the soil–steel sections within a single 72-hour train stoppage window. Crane operations were planned with Nordic Cranes and backfilling was executed by AF Anlegg with subcontractor Løype Anleggsdrift AS, ensuring continuous progress throughout the possession.
ViaCon managed the concept and detailed design and approval process with Norway’s rail infrastructure manager and the Norwegian Public Roads Administration, streamlining technical coordination across stakeholders.
The ViaCon Advantage
Technical specifications
7.0 mm plate + 5.5 mm ribs under the pedestrian road
Hot‑dip galvanized “class B” (Fe/Zn 115) per EN ISO 1461:2009
300 μm epoxy painting (EP + EP) per EN ISO 12944
6–7 weeks of pre‑assembly
<72‑hour rail possession for demolition, foundation element installation, and section placement
Nine steel sections installed using a 450 t crane from two lifting positions
