[EN] In this End-of-degree Project an analysis of the arch as a structural typology is carried out, focusing in the role that construction has played throughout history and highlighting the theoretical knowledge of arch bridges in civil engineering. In addition, the dissertation gives a detailed explanation for the calculation of the pressure line by means of graphical methods. Moreover, the text contains an analysis of the structural security of the main arch of the Salginatobel Bridge, designed by Robert Maillart and constructed across a valley in Schierts, Switzerland in 1930. To perform said analysis, the Spanish regulations currently in force have been observed. A computer tool has additionally been created in which several graphic...