Ask a carpenter for practical standard. I would imagine they use about a thickness of a nail or so. You should be able to figure expansion of the material. I would say a gap of 1/8" should be about right.
Just relax if its covered there should be no issue. Delamination would be more of a problem if it's exposed to freeze thaw. The higher air could be due to the high water content, but the strength appear to have come up so there is no issue. Concrete is a strange material at times, use common...
In general when an engineers reviews and stamps the job for approval they are overall taking responsiblity and their future could be at stake if negligence is found. Not only is the beams or columns or building element important but so is the connection. Some engineers are more particular...
I'm confused with the load combination's. The minimum live load is 20 psf. If designing a roof and taking a reduction due to area I get a roof Lr =12 psf. I have a snow load of 15.4 psf, DL = 20 psf, and WL = 15 psf.
In the load combination's is there still a LL or is the Lr the only live...
