After the collapses at other places in the last few years, to me this sounds like trouble waiting to happen. You take three stories and put who knows how many stomping and hollering kids on the top one. You know that they will get as many as they can up there (probably one of the better views) and they will not stand still. My imagination has the whole thing tumbling. Why put it up? Just to sell 180 more seats at who knows how much and put that in someone's pocket? Leave it be folks, build some real seats after the season. I don't care how well the thing is designed, when you have the possibility of weight shifts, marked weight shifts, on the top then you are looking at trouble.