There's only so much you can do. It's not worth risking life and limb climbing up on a snow/ice covered roof to shovel it off that's for sure. I don't think any RV roofs are actually tested for overall weight-bearing capabilities, so there's probably no known answer to the "how much" question. Now of course you can always give Newell Coach a call and see if they can answer your question.
Joseph
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1976 Newell Classic (Sold)
Home Base: Riverside, CA
If anyone needs my contact info private message me and I will send it to you.
-Joseph-
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