3.15. The calculation bases of tall buildings to the marginal status of the second groups (strains) should be performed on the main load combination, while the deformation characteristics of soil bases are taken with the coefficient of working conditions = 0,9. Values of strength characteristics of soils in the calculation of high-rise buildings for the second group of limiting states are taken 'with the provision of' 0.95 per SNiP 02/02/2003. 3.16. The calculation bases on the deformations is based on the conditions (1) where S – strain compatibility reasons and structures, determined by calculation in accordance with the recommendations of sp 50-101 – limit joint strain the grounds and facilities to be installed in accordance with the recommendations pp. 3.19 – 3.29 of this document. Joint deformity grounds and facilities are characterized by: – the absolute precipitation (lift) of base S separate foundation – an average draft of the base structure S; – the relative difference between the sediment (lift) of two foundations; – roll foundation (construction) i; – deflection or curving f / L; – curvature bending plot structure – the relative angle of twist constructions – the horizontal movement of the basement (Construction) u. 3.17. Limit values for the characteristics of joint strain and Foundation of the underground part of the high-rise buildings are recommended to set on the basis of the need to observe: technological or architectural requirements for the construction of the strain (change in levels of design and construction provisions as a whole, its individual components and equipment, including requirements for the normal operation of elevators, special equipment, hoist elevators, etc.) -; requirements for strength, stability, and fracture of structures, including the overall sustainability of buildings, -.