Logging Slide Presentation
|
|
|
|
Felling Hinge
The hinge is the wood between the undercut (face cut/notch) and the back cut.
The purpose of the hinge is to provide sufficient wood to hold the tree to the
stump during the majority of the tree's fall, and to guide the tree's fall in
the intended direction. The position of the hinge will affect the direction of
fall. The size of the hinge is important to prevent splitting, fiber pull,
barber chairs, and other undesirable and unsafe actions.
|
The following describes a proper hinge:
-
The length of the hinge should be 80% of the diameter
of the tree at breast height.
Example: For a 12-inch diameter tree the hinge should be 9.6 inches long (12
inches x 0.8).
-
The width of the hinge should be 10% of the diameter of the tree at breast
height.
Example: For a 12-inch diameter tree the hinge should be 1.2 inches long (12
inches x 0.1).
-
The hinge on a tree with no side lean should be perpendicular to the intended
direction of fall.
|
|
|
|
|
Back to Top 
www.osha.gov
