The method of estimation of safety of bearings build constructions is considered during work of crane with a maximal carrying capacity. The calculation chart of building and variants of appendix of power influences is analyzed. The results of instrumental inspections of materials of build constructions are conducted. The calculations of build constructions of building are realized on the standardized programmatic complex. On results test calculations a conclusion is done about possibility of safe.

Keywords: building structures, methods of calculation, load, safety, strength, deformation, fittings, reinforced concrete