To secure the bridge from rockfall energies up to 2300 kJ, a gallery roof construction was built above the street-stretch between the two tunnels. To reduce the risk further, the gallery-roof was secured by the ROCKFALL-X G damping system. A protection system which works by absorbing kinetic energy, thereby limiting deformation and above all limiting the pressure exerted on the deck by spreading loads over a wide area, while limiting the weight on the gallery so as not to overburden it.
556 preassembled ROCKFALL-X G big bags were delivered and installed during May and June 2014 in the following configuration:
- 109 pcs. - 1.0 m high
- 99 pcs. - 1.5 m high
- 348 pcs - 2.0 m high