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1. A composite assembly of a steel structure for lifting equipment comprised of a lifting system, into which lower parts of a system of vertically connected pillars connected to one another by cross-beams are fixed, characterized in that a levelling lifting system is comprised of distribution plates that are anchored into a concrete recess using chemical bonds via openings, with a structure levelling system comprising an adjusting screw, adjusting load-bearing nut, and a safety nut, where the adjusting screw passes through an opening in a lifting plate welded onto lower part of a lowermost pillar of the steel structure and vertical connections of the lowermost pillars, on inner sides of both ends fitted with sets of openings mutually arranged at the angle of 90 degrees, are realized by inner connecting pieces with a first set of fixed nuts, attached using a first set of Allen head screws with safety washers having a resistance to spontaneous loosening due to vibrations via a set of openings, and a connection of a cross-beam and the lowermost pillar, fitted with fixed integrated nuts, screw connections is realized in the face of the cross-beam closed by a plate via oval openings on the inner side of the steel structure by a second set of Allen head screws supported by safety washers with the resistance to spontaneous loosening due to vibrations, where the screw connections are also fitted with mechanical protection by safety plates, attached by a third set of Allen head screws to a second set of fixed nuts attached into the inside of a section on the side of the cross-beams, with corner reinforcements ensuring the stability and perpendicularity of the screw connection of the lowermost pillars and cross-beams, further comprising a system for seating a bracket of guide rails consisting of an oval opening and a T-bolt, having a rectangular block in rear part and a square block on top of it for fixing and levelling attached elements of an elevator.
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