Acta Scientiarum Polonorum

The paper describes integral bridges and presents examples of two multi-span integral viaducts, built using
reinforced concrete elements. All the structures have been constructed along N18 national road from Limerick
to Galway in Ireland. At the beginning, the design principles and modeling of an integral bridge have
been described. Presented viaducts have been designed checked by the author of this paper. Some advantages
and disadvantages of those structures have been discussed. The author is focused in particular on an integral
viaducts design, its construction process, construction cost, and behavior during its service. The article
concludes with a summary of author skills and knowledge about the design of integral multi-span viaducts,
with recommendations as to the design of those bridges in Poland.