To the design of roofs and ceilings of modern buildings have high requirements on the bearing capacity and the architectural expression. The article considers a constructive solution to the coating of the building with light cross farms. The spatial work of such coverage is provided by bonds arranged in two directions farms, perceiving external load. The increase in hardness of the coating leads to a decrease in effort in some parts of the coverage. This allows the use of thin-walled steel profiles with less consumption of steel to cover in comparison with splenomegalie rolling beams. It is proposed to use various options of the arrangement of spatial units: 18x18, 24x24, 24х18, etc. the Overall structural stability is ensured by the fact that the coverage is created a few of these spatial blocks around the perimeter. The calculations allowed us to obtain the optimal size and number of cells on which it is conditionally possible to divide the disk coating.
Keywords: Coating, cross-system, thin-walled, calculation, comparison