Patent ID: 7708523

Claim:
A method of constructing a wind turbine, comprising: forming a blade assembly in which a plurality of blades are attached to a rotor head; attaching a suspension structure to said rotor head; lifting said blade assembly through said suspension structure by a first crane; and installing said blade assembly to a nacelle of a wind turbine tower, wherein said attaching a suspension structure comprises: attaching eye plates to said rotor head; and fixing a suspension plate coupled with a suspension ring wire to said eye plates, and said blade assembly is suspended through said suspension ring wire by said first crane; wherein said eye plates have a plurality of protrusion sections with holes, respectively, and said suspension plate has a hole corresponding to said holes, and said fixing a suspension plate comprises: inserting a pin into said holes of said plurality of protrusion sections and said hole of said suspension plate; and inserting a slip-off prevention pin into said pin.