In my opinion it is an all around bad idea. If it holds right now the constant pressure of the weight and the moving of the floor as you walked across it would eventually lead to failure. It is not a question of the weight also it is about PSI. A ton of weight over 1 sq in has a lot more sheer force than a ton distributed over 1 sq ft. I think it is also a recipe for failure because builders out here build crap homes and try to save in every way possible, that is one of the reasons I got out of construction out here I got sick of the shoddy workmanship on new homes. But that is all just in my opinion.