METHOD FOR CRANE TOWER EXTENSION IN SPACE-LIMITED ENVIRONMENT Russian patent published in 2009 - IPC B66C23/34 

FIELD: construction, equipment.

SUBSTANCE: invention concerns the building tower cranes. During the crane erection, after tower extension upwards during its lengthening by an extension section, at least one boom section is hinge-joined by a known method to boom root using the assembly crane, then the boom section is lowered into vertical position by the assembly crane, the second boom section is hinge-joined to the first one, with the length of the second section multiple of the tower section length. Then the tower height is increased by means of tower extension by two-times the boom section length, then the tower is fixed, the extended boom section is brought up to the tower until the eye openings of the abutting boom sections are aligned, lower boom section chords are connected and the upper chord of the next boom section is connected to the previous boom section, then the tower height is increased and after that the described cycle of the simultaneous tower extension and boom extension in the space-limited environment is repeated.

EFFECT: opportunity of tower crane erection and dismantling, tower extension and boom extension in the space-limited environment.

3 dwg