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ACKNOWLEDGEMENTS 
The authors wish to acknowledge the contributions of their 
colleagues for their help during and after the measurement 
campaign. Prof. Dr. Peter Marti, Barbara Ebert and Stephan 
Etter from the Institute of Structural Engineering are thanked 
for planning and organisation of the load tests on the Felsenau 
viaduct. A special thank is given to Orlando Monsch from the 
Institute of Structural Engineering for providing the 
photographic documentation. Furthermore, Martin Wehrli is 
thanked for post-processing parts of the 3D-point clouds and 
analysing the data of the precise levelling.