My sister has a grand piano in her condo. I have no idea how they got that thing in there but it is possible.
Hmmm. Your post got me interested in the mechanics of piano moving. As it happens, my sister also has a baby grand in her condo. She inherited it from our late mother so it has been through a series of moves, mostly involving condos. A baby grand requires careful handling by movers who know what they are doing but I am told it is quite manageable. Unscrew the legs and turn it on its end or side and there you go.
But, of course, there are larger versions so I checked out their dimensions. Here is a chart:
Where does your sister’s instrument fit on the scale?
All grands are more or less the same width, apparently, about 5 feet, but increase in length until you reach the concert grand which is about 9 feet long or more. I am quite sure that a concert grand would not fit in the elevator in our building. But I think some of the smaller sizes would fit and a baby grand would not be a problem.
I hope somebody knowledgeable on moving pianos picks up this thread