your thinking of a self erecting tower crane
they honestly do get a little mibile crane to put up a big mobile crane to put up the really big craine. but in a large site they only need to do that for the first one then use that for then next one etc.
sorry wrong board.. must get back to craniacs.com
( ,
Mon 27 Oct 2003, 23:22,
archived)
sorry wrong board.. must get back to craniacs.com