Oh I sure as hell don't think so. Isn't there a sightseeing tower in Niagra on the Canadian side that has glass floors? Or maybe did at one time, since it's been many years since I was there. There was a foot or so wide concrete ledge attached to the building but the floor from there on out was glass and I went around the whole thing with my feet on the concrete and my back plastered to the side of building. I get sick feelings just thinking about it and it was probably 25 or 30 years ago. I may be wrong about it being Niagra but since I could only think about taking that next step towards the down elevator and breathing, I'm not sure now where I was. The rest of the family had a great time of course and told me later that the view was fantastic.