I understand that the small crane is going to be lifted up, lots of pieces recently delivered and on ground at base of crane, and that it will be used to lift window washing equipment/platforms into place. I get that, but why can't the big crane be used for that job? Why does the big crane have to erect a little crane? And once the window washing stuff is installed, does the little crane go as well, or get dismantled and stored in the mechanical floors up top?
Thank you