Unless I was taught wrong they build using a crane. Then remove the cross section of the crane and use the vertical portion as the elevator shaft. (Skyscrapers) Having watched them build Miller Park (Now American Family Field baseball stadium Milwaukee) I can verify that they have mobile cranes that are actually big/tall enough to build stadiums and arenas. It is VERY dangerous, however, as was proven when wind caused the partial collapse of the roof while they were building Miller Park, killing 3 construction workers.
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