Was watching a program on Megastructures on NatGel channel last night, and they were following the construction a skyscraper in China. Just looked up the tallest man made building, the Burj Dubai. There is a picture (attached) showing construction at the top. I am not a construction engineer, but I understand how the cranes remain at the top of these structures, but how on earth you get those 2 cranes down from 3/4 of KM up in the sky?!?
Hats off to the construction people, steel workers etc - I get dizzy just looking at the pics!