structural vignette - please comment

[cmc1986]

I'm getting ready to take the structures exam this week, and attached is my first stab at the vignette.

I drew the vignette as steel, and tried to keep the max column distance to 40', so I was a little unsure about the upper roof framing plan on the north side. Per the directions, the north side has a continuous clerestory...but the span was over 52'. I added a column directly above the lower level framing plan. Not sure if this was the best move.
Also, joist spacing is 48" o.c.

Any comments are much appreciated! Thank you!

[Enzo]

looks pretty solid to me !

[markarch]

this is exactly how i solve it.

[cmc1986]

Thank you!