Precise angles and consequences

This topic contains 4 replies, has 3 voices, and was last updated by Jim Rogers Jim Rogers 2 weeks, 1 day ago.

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  • #20643

    I’m seeing precision to 2 decimal places on the plans (e.g 39.81 degrees). I have no tools with which to achieve such precision. What are the consequences of cutting a 40 degree angle vs 39.81? How much should I be worried about this?

    20×20 King Post plan

    Mike

    #20645
    Brice Cochran
    Brice Cochran
    Keymaster

    If you use that dimension throughout the project and do a little head scratching with the king post and rafters you should be ok.  I would recommend that you buy a framing square for $10 and use the 10″/12″ layout using it and get the exact 39.81.  From there you can use a set bevel gauge for all the other angles spots to ensure everything stays the same.

    #20649

    Thanks for the quick reply!

    Is there a similar way to plot the 10.39, 21.41, 45.57, and 55.15 degree lines? If not, how do you advise plotting them?

    Thanks,

    Mike

    #20654
    Brice Cochran
    Brice Cochran
    Keymaster

    I use a construction master calculator to figure out the rise and run of the different angles that I need for a framing square or use a simple protractor.    Here are a couple of other references for you.  http://www.shopnotes.com/files/issues/114/framing-square.pdf

    http://www.johnsonlevel.com/News/FramingSquare

    #20896
    Jim Rogers
    Jim Rogers
    Moderator

    When I cut a frame that has some specific angles I create an “angle board” this is a template board that has all the angles of the frame drawn on it so that I can set or re-set my bevel gauge to that specific angle.

    I wrote a story long time ago, about how to create an angle board and use your bevel square to copy the angle.

    For more information about this see this thread:

    http://forestryforum.com/board/index.php?topic=52291.msg754380#msg754380

    Jim Rogers

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