I've always wondered, how do they lift cranes? Bigger cranes? What do you think/know?
they build it peice by peice.
The use other large cranes. They put them up there piece by piece, and sometimes use cranes on the ground to hold pieces up while they assemble them.
Most cranes use hydraulic lift. But lets say they are building a sky scraper the size of the dubai tower. They set a hydraulic lift crane to a certain point and lift components for another crane up. They then use that crane based at ground level to lift up parts. the other crane is based in the elevator shaft and they can set that crane up as high as they need.
