Originally Posted by shakman
I thought the structure will be demo'ed with the sections of the facade remaining which will be part of the final product. The remaining facade will have shoring system to keep it from collapsing. Then the facade will be filled from behind as the tower rises.
I have seen this type of construction, as noted, numerous times.
There are a couple of examples of the kind of facade retention that you're talking about underway in Toronto right now, but as Innsertnamehere mentions above, the problem with this facade is that the floor heights will not match those of the new building, so it is being taken apart and rebuilt with higher floors, resulting in the same height, but with only 13 floors rather than its current 16.