There's a huge transfer slab behind that spandrel. It's not being thrown about willy nilly here...Oh, hi spandrel!
It is indeed sprinklered curtain wall on the north side.It's not back-painted glass, it seems totally flat (no pillowing like at Alter), and we seem to be looking at curtain wall on the north side. Win win win.
It's not so much how long it would have taken to install, it's the supply chain issues required to get it there. There is only one supplier who does the kind of curved glass which is being used on One Bloor and there have been significant issues with them. So much so that new brackets had to be engineered and produced locally as the ones which accompany the system failed in our diverse climate.I actually don't like the glass. I get why it had to be changed but too bad we couldn't get the same system that One Bloor uses. Granted the building would end up taking almost 10 years to finish.