For highway in the city of Žilina, the same twin parallel precast box girders were used with main spans of 60.5 m for a total length of 1042 m, where the same cross section was castoff throughout the bridge. The 60-ton segments were precast in an existing yard and delivered by trailers. They were lifted into place by a self-launching gantry placed on the previously completed portion of the deck. In order to assure the safety under construction of bridges, strain and temperature observation at

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... e site are conducting since August 2016. In this paper, measured data are analysed. As a result, straining variation produced by temperature has revealed linear correlation, essentially simplifying design procedure. The data recorded for the study include detailed obvious measurement of the bridge structures during construction, along with measured strains and temperatures. Data significant for long term behaviour of structures will still being collected.