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    mansonjl's Avatar
    mansonjl Posts: 1, Reputation: 1
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    #1

    Apr 4, 2012, 05:25 AM
    formula for figuring pitch
    I am trying to figure rafter end angle cut for a 16'x16' roof that drops 18" in 16'
    creahands's Avatar
    creahands Posts: 2,854, Reputation: 195
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    #2

    Apr 4, 2012, 06:35 AM
    Divide the number of feet in run by number of inches in rise.

    If u are making rafters that are running the full 16' from front to back your pitch will be 1 1/4''. This is virtually a flat roof.

    If the ridge board is located at mid span then the roof would pitch to both opposite walls and be 2 1/2''.

    If u are in a snow area the pitch is not enough to pass most building codes.

    The lower the pitch the large the rafter size has to be.

    Chuck
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