eTools Home : Logging  Standards | Glossary | Bibliography | User Guide | Credits
Logging eTool
 
The Humbolt Bottom or Undercut

  The undercut is the second of two cuts that result in a Humbolt notch. The notch is made on the side of the tree facing the direction that you want it to fall.
 
The Correct Cut
 
1. Starting Point
Very Important -- begin below the top cut at the level that will create at least a 45 degree notch opening.
 
  Diagram of Correct Cut Diagram of Cross-section
2. Angle of Attack
Important -- cut upward at a 45 degree angle
 
3. Ending Point
Very important -- stop when the cut reaches the end point of the face cut. Ideally, you have created a 45 degree notch opening.

Common Incorrect Cut
 



Arrow
Common Incorrect Cut - Here the ending point of the under cut doesn't meet the endpoint of the first cut resulting in a Dutchman notch. Here the ending point of the under cut doesn't meet the endpoint of the first cut . . .
. . . resulting in a Dutchman notch.


 
   
  Continue with The Humbolt Back Cut >>


 

eTools Home : Logging  Standards | Glossary | Bibliography | User Guide | Credits