According to modern standards, unique buildings and structures include buildings whose spans exceed 100 meters, with successful approbation in practical application, or spans over 60 meters with new design solutions, which require the development of new special calculation methods and the creation of physical models. Unique buildings include objects with a permanent number of people of more than 500, and periodic more than 1000-10,000 people, including people who are near the structure. The reliability of design solutions is confirmed by analyzing design schemes with subsequent assessment of methods and means of performing calculations. It is also necessary to observe, in order to study, the results of calculations for the strength and stability of the spatial system of a structure, to compare the data of theoretical materials with experimental ones obtained as a result of checks.