FIELD: oil and gas production equipment. SUBSTANCE: invention relates to mechanization means for mounting large units of derrick and aims at providing turn of large units at the same place about center of gravity of load. Platform comprises wheeled carriages with brackets to which lower floor is attached. On the floor, through rolling device, bearing platform is mounted on which unit to be turned is installed. Turn of unit is effected by agency of additional haul-off device. EFFECT: improved design. 1 dwg
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