Crane system incorporated into a tower

Abstract

A crane system includes a structural truss positioned within a central opening defined by an inside surface of an annular tower, a crane mast connected to an outside surface of the annular tower, and a jib arm connected to the crane mast.

What is claimed is: 
     
         1 . A method of erecting an annular tower, comprising:
 positioning a structural truss within a central opening of a first annular tower section at a first height, wherein the structural truss has multiple beams that form a lattice with multiple joints that are in contact with an inside surface of the first annular tower section;   connecting a crane mast positioned on an outside of the first annular tower section to the structural truss through a lateral opening in the first annular tower section; and   moving the structural truss to a second height within the central opening.