The construction industry, in which the technologies of information modeling of buildings and structures are actively applied, continues to develop rapidly. New technologies allow us to automatize a large number of design processes, such as formation of project documentation, specifications formation and others. Particularly BIM technologies are needed in the design of engineering systems, because they allow avoiding the occurrence of design errors that involve intersections of the projected objects - collisions. Despite the wide possibilities of modern software systems and the availability of a large number of tools for identifying collisions, the process of finding intersections is far from ideal In the article, on an example of work on an object of an apartment complex, problems are identified and solutions are offered.