BTDT.I had an Arrow shed... Until it collapsed under snow load during a blizzard. I had to put a turkey down because she broke her leg, one flew off and I gave up looking for a white turkey in a snow storm (she actually somehow survived a severe winter and showed up in a neighbors yard the following spring), the rest got moved to a different building. If you live in snow country, you'll really have to keep snow cleared off of the roof. Which could mean going out during a blizzard and/or at night.
Had to build a 'truss' to hold it up, then a tarp.
Other shed I propped up the cross members by sticking a 2x2 between floor and roof,
but still used roof rake to keep clear.