archited
Senior Member
The panelization on 3 sides of the building (there are 5 sides) requires that 2 (or 3) storeys are fitted in place at the same time so that the skin on these sides has to be ready top to bottom -- these elements will get added very quickly by crane and so the subsurface needs to be uniform before the job begins. The balcony areas are a different matter but they are likely not on the critical path and they may want to have the balcony components in place first. Every project is different.

