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Open-faced Notch
Click here to learn how to cut an Open-faced Notch
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Conventional Notch
Click here to learn how to cut a Conventional Notch
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Humbolt Notch
Click here to learn how to cut a Humbolt Notch
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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 |