Two technical visits will be organised depending on the interest of participants.

1. Local visit to Sava bridges in Zagreb is planned for March 2^nd on Thursday afternoon 17-19 h. A bus will pick up the Workshop participants near the Faculty of Civil Engineering and bring them to the city center.
2. A whole day visit to Krk bridges is planned for March 4^tu, Saturday 9-17 h, if enough people will show interest. A bus will pick up and bring back the Workshop participants near the Faculty of Civil Engineering.

SAVA BRIDGES IN ZAGREB
Bridge building across Sava River in Zagreb started in the end of the 19^th century and up until now 13 bridges have been built on 11 different locations in Zagreb area, with more planned. During this technical visit, the plan is to visit 5 bridges on 3 different locations – old composite Sava Bridge, railway steel Green Bridge, arch steel Liberty Bridge, prestressed girder Adriatic Bridge and extrados prestressed Homeland Bridge.

The plan of the visit will be adjusted to the weather and traffic situation on March 2^nd but participant will for sure get an overview of the most relevant overview of all the bridge building eras in Zagreb, each specific with its material, structural and architectural identity. 

The Old Sava Bridge (1938) is the world first composite structure. Today, it is protected as a cultural heritage monument and serves as pedestrian bridge. The Green Bridge (1939) is the Langer beam, a through tied arch bridge with rigid deck and light arch, and has been recently strengthened. The Adriatic Bridge (1981) has been built as prestressed girder bridge with separated areas for vehicles traffic and streetcar railroad in order to meet increased traffic demands. Famous Liberty Bridge (1951) with steel arch serves as central Sava River crossing. It was designed and built as urban bridge including many originally designed details, but also plan of wider urban and transport interventions. The Homeland Bridge (2006) is contemporary externally prestressed extrados bridge.

KRK BRIDGES 

Krk bridges, constructed in 1980 by an innovative procedure forming a trussed arch cantilevers, consists of two large reinforced concrete arches, of 390 m and 244 m span. Both arches are of three-cell box cross-section. To achieve exceptionally large spans it was necessary to reduce the dead load as much as possible. The structural members of minimum statically admissible dimensions were utilised, with very small concrete covers. Bridges are located in very aggressive marine environment including very high salinity (approximately 3,5%), very strong winds carrying sea spray and winter drops of temperature below freezing point.
The works on the Krk Bridge initiated a further research into durability design of reinforced concrete structures in aggressive maritime environment, namely in developing further specifications for application of surface protection systems on damaged structures as well as integrating surface protection systems with concrete cover in the design of new structures in aggressive maritime environment.

Registration for technical visits needs to be indicated within the registration form for the complete Workshop.