I think what is meant by 'They placed the panel on L10 upside down' is that the reinforcement cage was placed in the mould upside down, and the rest of the hardware and ducts went in to design. As you point out, it is hard to lift a precast panel without lifting points on the top edge, not to...
Thanks mangotree, an interesting and reserved letter from Cardno.
Having thought a lot about this failure, I would like to pose a question to the thread: what was different on 24 December from 23 December or earlier?
The building was completed in August, the elements in question at Level 10...