Two final questions, if I may: What drawing/drafting program did you use? And did you use a formula for coming up with the 6' 1 1/2" length. The maximum span for a 2×6 rafter on a shed roof could be around 10 to 12 feet, depending on factors like the roof pitch and load distribution. You might consider making some type of brief presentation. The 22.5º angle is easy enough to understand, and I'll guarantee you that there are thousands of people on YouTube which would give anything to see your drawing. Use this simple top cord truss calculator to estimate your rake (rafter) length for your next project’s roof sheathing requirements. They did not touch each other when placed in the jig. In fact, when I attempted to shorten it 1/8" on each cut, the pieces appeared too short. We choose to use gussets made from birch plywood which were nailed and glued to the rafter trusses, which were made in a jig to keep. What an amazing tool We milled our own timber for our rafters and post and beam barn structure which built on our property here in Ireland. Roof pitch between 15 and 22. Maximum clear span of rafters in metres for roof pitches of between 15 and 45 degrees Roof pitch between 15 and 22.5 degrees with rafter spacing strength class C16. I even built a jig and placed guides (stops) in order to assemble a truss that would guarantee me a 16' span. Thanks so much to for the Gambrel roof calculator. Timber sizes and construction details for pitched and rafter roofs. Generally, 2x8 to 2x10 are common choices. By co-incidence, in desperation I made a physical layout on my barn floor and came up within 1/8 of an inch of your answer of 6' 1 1/2". The size of lumber depends on factors like span, load, and local building codes. Your drawing was worth more than a thousand words. I've spent every minute working on my barn. I apologize for not acknowledging your answer sooner.
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