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Cutting Common Rafters

The values on the calculator that we use for common roof framing are: Pitch, Rise, Run, and Diagonal. If you have any two of those values, the calculator will quickly figure out the rest of the right triangle—which means it will tell you everything else you need to know about a rafter.

Most of the time, the two values I have are the run of a building and a specified pitch, which is why I used these values for the example in this online tutorial:


2 Responses to “Cutting Common Rafters”

  1. Jeff

    Excellent video and explanations. The only downside I think is that you need to show how to do it in long hand without the calculator and be very specific. Then I think you have a complete first rate tutorial that everyone will want to see. Good job!
    Please never publish my email address


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