Tank weight issue

[wildjoe]

I have just returned form seeing a cabinet maker about building a stand and we got on the subject of weight. I'm putting together an Oceanic 58g rr and will be putting it in a bonus room on the second floor of my house. The house is fairly new, about 9 yrs. old. He said the minimum specs. in our area were 40 pounds/sq.ft. With the footprint of my tank size that comes to about a 400 lb. load. I'm figuring total weight of the tank/stand/ water/livestock/sump to be 500-600 lbs. He did say that the spec was minimum and that it may be no problem but that I may want to get it looked at by a contractor or buider. I haven't seen much feedback on anybody having issues with a tank that size on the forum and two of the LFS owners in my area (which are very reputable and well respected) didn't seem to think it was an issue. Any thoughts/experiences?