In house architecture, the steel technologies use has constituted, especially in Italy, a research and experimentation field rather delimited. Although the house topic has been most important in the modernist discussion, becoming, after the war, a social problem, its declension as to steel technology remains conditioned by the historical events, cultural background does not accept the temporary idea of housing, suggested by use of steel. In the outlook of vicissitude with fragmentary border reconstruction, the goal is to research technical modes and building system and to assess techniques and shape implications. These technical-project vicissitudes were analyzed as to different topic trends: ‘experimental house’, ‘anti-seismic house’, ‘temporary house’ and ‘steel house’. The building experiences of steel house have implied innovation processes, marginal and partial, and large and general tendency to technique hybridization, researching more the factors of constructive and functional rationalization, than the linguistic potentialities.
