It does not carry a wind or snow load rating. The manufacturer recommends that you keep the snow from building up on top of the structure with a soft bristled broom or mop.
We do have wind and snow load rated shelters of this type. We carry are the ShelterTube shelters by ShelterLogic
. These are available in both gray and green in sizes of 12 x 20 x 11, 12 x 25 x 11 and 12 x 30 x 11. They can resist winds up to 80 mph and snow/ground loads of 43 pounds per square foot (when used correctly).