The Kö-Bogen project in the heart of Düsseldorf is one of the city's most complex and significant construction projects in recent decades. With the construction of a new underground railway line and the relocation of road traffic underground, above-ground new open spaces were created for urban planning. The underground traffic routing allows fast connections, less congestion in the city centre and better accessibility through direct connection of the tunnels to several underground car parks. The company Franzen Feuerschutzüren from Erkelenz was involved in the structural engineering work on the first construction phase. It supplied variously equipped fire protection doors from the Schröder system for the staircases, connecting corridors and rooms in the technical areas of the tunnel.
North of the famous luxury shopping mile Königsallee, called "Kö" for short, the cityscape was dominated by the "Tausendfüßler", a high street from the 1960s, until 2013. Where this once pulsated as the main traffic artery, a modern urban space has emerged in recent years, inspired by the historical structures of Düsseldorf. Exceptional architecture, such as an ensemble of buildings designed by star architect Daniel Libeskind, the pedestrian link between various main shopping malls, promenades and squares for strolling and lingering, as well as many green spaces and water areas make the Kö-Bogen a new focal point of the state capital of North Rhine-Westphalia.
Consistent separation of traffic flows through tunnel construction
This transformation was made possible by a reorganisation of the traffic routing around Jan-Wellem-Platz. The city, which has a population of 597,000, consistently separated public transport from private and pedestrian traffic. After a construction period of eight years, the Wehrhahn Line, a subway line in an east-south direction, will be opened in 2016. The tunnels for motor traffic were built in two phases. In the first construction phase, the 300-metre-long north-west tunnel opened in 2013 and the 350-metre-long South-North tunnel opened in 2014 were built.
Tailored fire protection doors ensure safety
To protect the technical areas of the tunnel, the client decided in favour of fire protection doors of high quality and long durability from the company Franzen Feuerschutz Türen in Erkelenz. Since 1976, this company has been a licensee of System Schröders. After Düsseldorf, Franzen did not supply any standard solutions for the Kö-Bogen tunnel, but equipped the doors with various multifunctional properties. Doors were manufactured and installed which are smoke-proof according to DIN 18095, contain glass cut-outs, are equipped with dead bolt contacts, magnetic contacts or blocking elements or have anti-panic fittings according to DIN EN 175/1125.
The customers of System Schröder's licensees are provided with fire protection closures that meet their often very demanding requirements. They ensure that all building law requirements are met and that the doors are perfectly certified. Our door constructions are tested and approved according to the latest European standards. Special solutions that deviate from the building supervisory approvals are also implemented by the manufacturers. System Schröders offers a complete service, which includes the development of the special solution, the application for approval in individual cases and the required expert opinions.