Tagus river centenarian steel bridges' rehabilitation

The paper ends with a brief conclusion about the major problems that affect this kind of structures though their long existence: the nature of their constitution, the original conceptual design and the influence of its assumptions in the global behaviour of the structures, the difficulty to estimate quantities of repair in the early stages of the intervention (during project time) where no pickling process has yet started and real deficiencies are covered with paint, the thorough work necessary to add the compulsory resistance preserving its aesthetic and heritage, among other remarks.