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Slide 63
    TEXT VERSION OF TITLE SLIDE:

    Title: Kinds of Notches
    Type: Text and Image Slide
    Content:
     
    [Image of a open-faced notch]   [Image of a conventional notch]   [Image of a Humboldt notch]
    Open-faced Notch

    [Click here to learn how to cut an Open-faced Notch ]    		   Conventional Notch

    [Click here to learn how to cut a Conventional Notch ]    		   Humbolt Notch

    [Click here to learn how to cut a Humbolt Notch ]
    Total angle ideally 90 degrees; at least 70 degrees   45 degrees   45 degrees
    Top Cut angled downward
    70 degrees    		   angled downward 45
    degrees    		   flat horizontal
    Bottom Cut angled upward 20
    degrees    		   flat horizontal   angled upward 45
    degrees
    Back Cut horizontal; at the same height as the corner of the notch   horizontal; at least 1 inch above the bottom cut   horizontal; at least 1 inch above the top cut
    Depth 1/4 - 1/3 of tree diameter 1/4 - 1/3 of tree diameter 1/4 - 1/3 of tree diameter
    Point of notch closure just before tree hits
    ground    		   middle of fall   middle of fall
    Degree of safety high medium medium
    Advantages greater accuracy of
    felling into target area

    hinge stays intact until tree hits ground

    less danger of kickback and other out-of-control movement    		   familiar to many loggers   saves slightly more
    wood

    familiar to many loggers
    Disadvantages hinge may have to be
    cut off    		   hinge breaks early   hinge breaks early


    While all three of these notches are acceptable, the Open-faced Notch is clearly the safest and most accurate.