...all cranes here have been of a mobile sort. And will likely continue to do so when needed. Not only does this likely cut down the cost of having a more permanent crane during construction, but so far they haven't really needed one. And for what that's worth.
...observing this process, it's not something that once the pane reaches it's destination it simply clicks into place. There's a lot of complicate nudging, subtle maneuvering and coloured instructions from the workers involved before the said glass is settled. And with likely many thoughts and prayers that the thing doesn't crack or break in the process.