We have developed a video titled "PVC Load Test" to prove that a single hub on our 16' PVC dome can support the full weight of a person.
PVC Load Test Video
The total static weight that can be supported over the entire dome is usually greater than any normal snow load it will have to support, as snow does not easily accumulate on a round roof.
The reason a geodesic dome can resist damage by snow loads is that the shape of a geodesic dome naturally sheds snow.
Notice from this picture of a large geodesic dome in Antarctica, that there is no snow on the top of the dome.
In this next picture, one of our Zip Tie Domes is being used as a Geodesic Ice Fishing Hut on a frozen lake. Notice again that there is not a large snow load on the top of the dome.
Inside the Zip Tie Dome
The shape of the geodesic dome allows the wind to help naturally shed snow from the dome.
Note: If you do have a "wet snow" along with "no wind" so that the snow does build up on the very top of the dome, you need to be diligent and always clean any snow that accumulates on top of the dome.
A freak "wet snow" can weigh thousands of pounds. Snow should never be left to accumulate on any greenhouse structure. A wet snow needs to be removed immediately.
If you live in an area with a large amount of "lake effect" or other heavy snow, a vertical support post in the center of the dome can be added for additional support.
