Since the first rockfall test in 1962, our engineers have executed recurring field tests to push the energy stress limits. We are improving the benchmark and providing greater safety.
Since 2001, engineers from the WSL and Geobrugg have continually tested rockfall protection nets at the WSL facility in Lochezen near Walenstadt, Switzerland. After detailed analysis of the test data, our new rockfall barrier systems continue to receive official approval by the Swiss Federal Office for the Environment (FOEN) and/or the European Organization for Technical Assessment (EOTA). For our clients and their safety only the best is good enough for us: That is why we conduct vertical drop tests, the most demanding test-scenario, on our systems.
Today our nets are of such high quality that they can stop concrete blocks weighing up to 25 metric tons travelling more than 100 km/h.
During the installation of rockfall protection barriers in Japan and North America our engineers developed the idea of using flexible barriers against debris flows. Our rockfall ring-net barriers are capable of stopping debris flow because of their brake elements and flexible behavior. We tested the system in Illgraben, one of Switzerland’s most active debris flow regions with up to eight events per year. In cooperation with WSL and the Swiss Federal Institute for Forest, Snow and Landscape Research, we set up measurement instrumentation and video cameras to analyze the behavior of debris flows. We use that data for dimensioning, developing, and improving our ring-net barriers.