System and method for assembling tower sections of a wind turbine lattice tower structure

A system for assembling a lattice tower structure for a wind turbine, the system comprising:

• a plurality of support legs and a plurality of secondary support members configured to be assembled together to form a tower section of the lattice tower structure;
• a tower assembly fixture including a plurality of radially extending fixture arms, each fixture arm extending between a first end and a second end;
• and
• a plurality of trolleys, each trolley including a base frame configured to be coupled to a respective one of the fixture arms between its first and second ends and a leg mount configured to be coupled to a bottom end of a respective one of the support legs such that, when each of the support legs is coupled to its respective leg mount, the support legs are supported above the tower assembly fixture at a substantially vertical orientation so as to allow at least one secondary support member of the plurality of secondary support members to be installed between each adjacent part of support legs,
• wherein the leg mount is pivotally coupled to the base frame such that an angular orientation of the lea mount relative to the base frame is adjustable.