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Main river valley bridge

The Calenberg Cisilent® noise protection system for road bridges has been installed on the bridge (A73) across the Main river valley independently of the viaduct structure. Cisilent® elements on the wing walls and Cisilent® sheets beneath the joint gap form an enclosed space in which secondary airborne noise emitted by the support for the viaduct structure is systematically reflected, absorbed and insulated.

Calenberg Ingenieure designs, manufactures and markets elastomeric sliding bearings, and statically or dynamically loaded structural bearings (elastomeric bearings) for buildings and structures, sub-ballast mats and trackbed mats for track construction as well as other elastomer-based products for noise insulation and environmental protection.

Even pipe crossings, where the space above is normally too small, are no obstacle. The flexible materials can be moulded to any structure and resist the weather conditions and chemical influence from dripping water without any loss of effectiveness in the long term.

For the maintenance of the viaduct structure, individual sheets can easily be detached on one side. Even a single person can manage the subsequent reinstallation thanks to the mass per unit area being only approx. 6 kg/m².

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