The most advanced are the joints with the spherical surfaces of the heads. They provide the possibility of a comprehensive pounding of a column and an installation that does not violate the density of the mating of the heads, the uniformity and centrality of the transmission of pressure from the overlying column to the underlying. The use of this design is especially advisable when joining heavily loaded square columns. The perception of bending efforts is achieved by welding of the headlines along the contour. A junction with an headman of 50 mm thick from cast steel structure of gipromesis. With this thickness of the headlines, about 310 kg of steel is consumed by a section of 600×600 mm with a section of 600×600 mm. The joint with a spherical head of the concrete of the brand «500» is recommended by the second — Moscow meeting in construction. It requires only 2 kg of steel.
