The Gjemnessund Bridge, built in 1992, is a 1257 m long suspension bridge crossing the Gjemnessundet strait on the northwestern coast of Norway, in Møre og Romsdal county. The main bridge span is 623 m, which makes it the fith longest suspension bridge in Norway. The box girder is made of steel and the towers of concrete.

Figure 1: The Gjemnessund Bridge. Photograph by NTNU/K. A. Kvåle.

The monitoring system consists of the following sensors (illustrated in Figure 2):

• 2 triaxial accelerometers
• 1 anemometer

Figure 2: Illustration showing the accelereometer and anemometer positions. Illustration by NTNU/K. A. Kvåle.