Skin testing according to DIN 1076 was carried out on site at the Jagst Viaduct (total length 346 m) and the Gronachtal Viaduct (total length 528 m) as part of the A6 motorway. The results were recorded in the "SIB-Bauwerke" program and the test reports were created.Due to the deficits determined in a recalculation, a complete picture of the crack pattern in the floor slab was also taken.