How do they get big cranes up on skyscrapers for renovation? and how do they bring it down? And where they keep the cranes after done?
with other cranes and lift systems. When done, they move on to the next project.
Renovation of skyscrapers typically uses a crane, if it has one, that is built up the side of the building, resting on the ground but fastened to the frame periodically for bracing. Tower cranes are built in sections and assembled in place with smaller cranes. To a large extent, renovation of skyscrapers is done from the inside - modifying some of the existing elevators, rather than doing anything from the outside, breaking through the walls to get stuff inside.
IT IS BUILT UP SECTION BY SECTION AND THEN TAKE IT DOWN THE SAME WAY.
