This chapter presents the considerations that were made during the research for integration of building information modelling and some of the main finite element analysis software for creating a structural model through different exporting formats. Furthermore, it compares and evaluates the effectiveness of different export formats within the interoperability with some of main finite element software. The Industry Foundation Classes is high quality format already affirmed in the exchange database. An integral part of the structural model should be the crack pattern, which is closely related to its structural behavior. It is rather frequent that an existing building is the result of a historic evolution, made by different portions added over centuries. Added or repaired walls, not well interlocked between each other, are discontinuities, which are existing weak points in the structure. Usually cracks develop first in these weak points and the structural analysis should include their presence.