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by
1l1l11ll1l
on 25/01/2020, 02:20:00 UTC

I'm sure the building owner and local Fire Marshall are quite happy that you punched a hole through a 4 hour fire rated wall to exhaust hot air to save on cooling costs.   Roll Eyes

Actually a 16 hour fire wall, you're so wrong. The fire Marshall helped me to it too. I also had to take on a few I beams that were in the way. Not sure what to do about the large crack that started forming in the concrete.