ronalda, congratulations on your decision of the 8285WS. We own a 2011
unit and are quite happy with our Rockwood. The floors are on 16" centers, bonded plywood on both sides of the Styrofoam insulation. You will be happy with the unit. I just returned from the rally in Goshen, IN
with a tour of the factory to see the Rockwood fifth wheel units being built. I was impressed with the craftsmanship of the people building the Rockwoods. A lot of improvements have been made since I purchased my 8285WS in 2011. Such as a raised roof instead of flat to get larger A/C ducts in the roof, rimless windows. A lot of changes have been made between 2011 and 2013's. Believe me you will not be sorry for your decision.
Keep a look out for the announcement of the next rally in Goshen, sign up for it. What a fantastic Rally, I have been to quite a few, this is the DADDY of them all!!