I'm not claiming the stairs thing to be fact. I just saw it mentioned on an article and it was mentioned here. The specific language used was voids by the JFRD spokesperson. I can understand that the fire suppression system not being active is a big deal, but JFRD themselves claimed that they thought the fire was contained within 2.5 hrs of being onsite. 1 hr dividing walls add up when you have several units in every direction.
What doesn't make sense to me, is that there were supposed to be residents moving in "next week." So, was the building still "under construction" or "almost complete" because those are two very different conversations. Yes I know that these units do not all complete at once, but it's not like the main building systems are not all functional when a C.O. is granted. If the building was "almost complete" then the fact that this building burned like it did is honestly shocking. There shouldn't be a numerous amount of open voids & the voids that do remain don't have a massive cubic volume relative to the size of the space. Like JFRD claimed, the fire should have been contained in a few hours, with a partial building loss. Or, tenants were not moving in next week. Simple as that.