I watched a crew raise an existing tower one time. They built a section on the ground then went up and cut all four corners about the middle of an existing tower while lifting the top section with a crane then had another crane set the section they had built from the ground in and then replaced the top section. There was a little more to it than that but impressive to watch. I think they needed extra clearance for a highway going through.
DirtHawg, Where can I get an application?
Mike C