ABSTRACT
Adopting the same intervention philosophy employed for masonry historical constructions, it is possible to avoid their complete removal, and to simply strengthen them. However, contrary to timber or steel elements, the retrofitting of reinforced concrete horizontal structural components is no straightforward task. Indeed it is not possible to merely reduce the span by adding some girder, since in such case inverted bending moments can be induced where no reinforcement is present. Therefore, two different strategies have been pursued.
