Depending on the area you live in and the typical weather conditions there, your structure may need to be engineered to meet certain wind and snow ratings. These ratings will tell how strong of wind gusts the unit can take and how much accumulating snowfall it can uphold. Some areas may not experience as much wind or snow as others, so you won’t have to worry about the structural integrity of your building. However, if you live in an area that is prone to high winds or heavy snowfall, you will need to check with your local building department about their required wind and snow load ratings.