Once again, I can't speak for the thickness of the glass, but I do know that glass does bend some with strain and even if it doesn't break, wouldn't that put a lot of strain on the corner seams? There are different types of glass and 1/2 inch might be strong enough in itself if everything else holds together, but I have also heard that glass gets more brittle with age. I think that might be true because I once tried my hand at cutting some old glass panels I had and all I ended up with were shards, lol