Asian wisteria if not kept in check can lift a small building of its foundation. I heard of one in the south on the old show "Gardening by the Yard",with Paul James. The trunks can get as large as a tree. Imagine the vine coverage. I have one and trim all the new shoots down to the main branches. It then blooms every year . The rest of the season I'm trimming the darn thing.thank goodness...