Miyamoto provided a seismic assessment for the “Breda” hanger, a steel structure built in 1936 that is considered one of the best steel-style buildings in Italy. The roof is supported by two 120-meter truss beams, which are supported by four columns. Although Milan is considered a low-risk seismic area, this building is pivotal to civil protection in case of an earthquake; therefore, a seismic assessment had to be performed. The first phase involved a thorough study of the steel structure, while the second phase involved the assessment of the steel structure and the two RC frames. The material testing and dynamic identification were performed for the computer model that carried out the assessment.