@UptownFunkYouUp
Nice to hear about your progress. We have a side internal wall up to head hight so far but we are behind on ground work. No concrete on the new bit yet as we are back filling the old back room and kitchen( suspended timber floor) to make the whole open plan area subfloor unified for the underfloor heating to go on if that makes sense.
I am sorry to hear about the pillar, we are having something similar done but our builder said he could work with either layout of the floor boards. Just one way is harder than the other. Our middle wall is only three metres long though, maybe the length makes a big difference. Are you hiding the rsj in the floor structure?
That said, you can definitely work with a pillar in the middle, I have seen many with an island attached or a pantry hidden behind. It would also be a good place for plugs and switches. Or you can have exposed steel pillar and beam painted a nice colour, if you like that sort of industrial look.
Our builder is on three projects at the same time. I am not too optimistic about the timing. I was told no structural work before Christmas.
Shame your structural engineer didn’t do a proper job. Hope the delay is minor and it is all smooth sailing for you after this.