When building your truss, it is important to note that the roof must be properly designed and constructed to withstand strong winds and snow loads. You want to make sure it stands up to protect your content properly for years to come.
Have a peek at this website to make a purchase for a good warehouse set and ensure the roof construction meets the code requirements for your area. After checking this, go to your local lumber yard and have them build your roof truss.
After the roof truss is shipped, take a pencil and mark your canopy every 24 inches to indicate where to attach the truss. Take the first support post and center it on the first mark and nail it into place. Repeat for another.
Most roof structures use 5/8 inch plywood sheets to cover the roof. Nail on the frame. Then cover with tar paper and asphalt tiles. It is advisable to do these steps on a calm day as the strong winds will blow can make the job much more difficult and dangerous.
If you live in a snowy climate, your roof slope should be sufficient to increase snowfall. If too much snow has accumulated on the roof, the structure will be subjected to unnecessary stress and possibly damage.