Method replacement main pillar of Yamagata steel tower

A while maintaining a truss structure, provides an easy and reliable method for replacing a main pillar of Yamagata steel tower. In A replacement method of the main pillar Yamagata steel tower, a support member 4 which is supported provided in addition to the main pillar 1 connected to the upper and lower ends of the object main pillar 1 replace the upper and lower ends, replacement target the main pillar 1, remove the web members 3 are joined to the web members attracting point of the uppermost, the main pillar 1 point to the web members attracting point and the upper second web members attracting point cutting, removal, and connect the new main pillar short side 5a to the main pillar 1 of the upper side of the cut portion, and bonding the web members 3 removed the in the novel main pillar short side 5a, these tasks repeating from the top, while forming a truss structure, replacing the novel main pillar 5 comprising the object main pillar 1 replacement of a plurality of main pillar short side 5a. .FIELD 1