Ya know that's a good question. I don't know if KZ gives an actual snow rating. But taken in the perspective of being able to walk on the roof, I weigh about 190# and if I stand with both feet close together, there you have about 190# in about a square foot. According to FEMA wet heavy snow weighs 21 pounds per square foot, so you would have to have snow about 9' tall to equal my weight per square foot. The fluffy dry snow we get is estimated as little as 3 pounds per square foot.
2018 Durango 318RLT Ford Lariat F250 Former RVIA master tech.
2002 GMC Sierra 2500 HD Duramax Crew Cab 4x4 * Banks Monster Exhaust * B&W Turnover Ball with 5th Wheel Companion * 2017 KZ Durango 1500 D277RLT Fifth Wheel * 1936 John Deere Model A * 62 Year International Flying Farmer Member
Not sure what you get for snow. We have a 30 ft Durango. We live in Western NY....in the lake-effect snow belt. We have had winters with 180+ inches total. Of course, it isn't in one storm but over a foot in one storm does happen...on top of what has accumulated in the past storms. People are clearing their home roofs. We have had a variety of trailers in various sizes and never worried....so far so good. We do leave the trailer with a slight incline so the snow/water will drain as it melts.