SNOW LOADS ON CANVAS TENTS
Snow loads. Canvas tents are not designed for heavy snow loads like a wooden structure. Houses have rafters every 2 feet to carry the weight of snow on the roof. If you plan on leaving your tent set up during winter you need to have at a minimum rafters every 2 feet.
Even with tent rafters every 2 feet it is still possible your roof will cave in during heavy snow loads.
Remove snow daily from the roof or every couple of days depending upon snow loads..
You must also have a fly/tarp on your tent. A poly fly allows snow to slide off much more easily than canvas.
The tent and fly must be very tight to prevent snow, rain and ice from collecting in the eave trough. The more water and ice accumulates in the eave trough the deeper the eave trough becomes. Ice and water in the eave trough can collapse a tent.