I'm in the process of trusting my garage with storage trusses. Instead of capping off the gable ends I'm going to leave openings so I can open it up and easily get big items in and out. What would be the best way to build doors? It doesn't need to be super fancy but needs to keep water out. The opening is 10' wide and 7 high, but I'm thinking a 6' wide opening would be sufficient.