|Accessed||times since March 19, 2001|
The three individual leg base columns were erected with a crane and they were joined at the first level. From that level, all further erection was done with a huge helicopter. As one with many helicopter hours I was amazed to watch their precision flying. They lowered the assembled sections with such accuracy the iron workers were able to align the holes and bolt the sections together."
Visit the Gray Museum in Cincinnati, OH
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