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GCarnegi, do you mean something similar to this pavilion? These were the preliminary sketches and calculations. The "unit run", backing bevels and other angles depend on the initial values of the roof slopes and the angle in plan at the eaves. Or are we talking about a structure with curved...

This Casio programmable calculator has been sufficient for my needs for the past ten years. Programmables have come a long way since; increased memory (this model has 4K of RAM), flash cards, color graphic, iconic displays, etc.

That would be me. My real name is the screen name in forums. It's also in the source code and will appear if you hover your mouse over that avatar in the web pages. I tried to work some math into that avatar. The "Pi" is from a famous formula: the exponential function raised to the exponent...

zed35467: This probably isn't what you're looking for but ... I do all my Rafter Dimensiong by calculating the cuts using trigonometry. This Hip/Valley Roof Calculator will help you determine the angles. It's still "under construction", has been for the past year and probably will never really...

Your definition of a "kernel" (not the "Buffalo Bill" one) is correct. It's kind of a neat name I picked up from the Timber Framer's Guild. Much like a kernel is related to the whole cob of corn, the roof kernels describe or model the geometry of the entire roof. Sometimes I just call the...