I think for the basic calcs you can use 50 lbs. a a square foot you do the math. Just looking at the pictures I would think no problem. Would be nice to see the original calcs. Here in California all that stuff stays with the permit in the building dept.
Here's some more to check out
http://www2.iccsafe.org/states/Florida2001/FL_Building1/PDFs/Chapter%2016_Structural%20Loads.pdf
Rick