The cycle overpass in Gdynia is a box structure over 300 metres long, 10-span. It was opened for bicycle traffic in the second half of 2013. At the end of its construction, there was failure due to excessive horizontal displacement of the system. A number of bearings exceeded the range of permissible transverse shifts thus it was necessary to temporarily protect the spans from slipping. The FEM analysis of the original solution and a proposal for a new bearing arrangement are presented in the article. Calculations were made based on a shell-and-beam model, reflecting the actual object accurately. The proposed new bearings system was eventually applied to the structure.