I am building a 12'x31' deck in Dallas, Texas. My questions are about the metal roof structure fabrication. What material would you use? Aluminum, steel? I'd like to keep it as light weight as possible, but the material needs to span at least 19' between metal posts at one point. Would you use c-channel, I beams, and how thick? This is my first patio build so just looking for some advice as I plan my roof structure.
