I bet the european curtain wall supplier is from Permasteelisa as one of their advanced curtain wall factories are in Germany. They did several supertalls like The Shard, ICC, Walkie Talkie etc. so I wouldn't be surprised if they are the ones doing the tower including the curved curtain wall for the Brookfield Place. IMO they are the best curtainwall builders in the world. They apparently have subsidiaries that build various specialized glazing systems too.
The atrium has a separate glazing system, not sure who is providing though but i think it is a nice seamless wall of structural glazing on some kind of point load system. Maybe Pilkington or even the same guys if they also do atrium walls. Will have to check their impressive website again.
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