DB OK the ROPS is designed using a static load, however ANY ROPS that has been certified will exceed the weight of the equipment, ,,,and Im digging here cause its been a lot of years since I did anything with them,,
But I think there is a 6 to 1 ratio so in reality yes you could roll it up side down and hang from the seat belt with out fear of it collapsing. The thing is were you to roll over side to side, the height of the ROPS will hopefully stop it rolling over on top of YOU if you are one of those that do not use the seat belt could the machine roll over and do a 360 and go again, sure, I have seen some strange things happen. All I can say is, that it works for what it was intended. If you feel it is not safe then maybe just take your orange tractor to your dealer and trade for a new one, or go green. Just do what makes you feel the most comfortable