Loading ...
Loading ...
Loading ...
• Study the natural conditions that can
cause the tree to fall in a particular
direction; such conditions include:
• The wind direction and speed.
• The lean of the tree. The lean of a
tree might not be apparent due to un-
even or sloping terrain. Use a plumb
or level to determine the direction of
tree lean.
• Weight and branches on one side.
• Surrounding trees and obstacles.
• Look for decay and rot. If the trunk is
rotted, it can snap and fall toward the
operator.
• Make sure there is enough room for
the tree to fall. Maintain a distance of
2-1/2 tree lengths from the nearest
person or other objects. Noise can
drown out a warning call.
• Remove dirt, stones, loose bark,
nails, staples, and wire from the tree
where cuts are to be made.
_,_ Plan a clear retreat path
_.... O _ Direction of fall
FELLING LARGE TREES
(6 inches in diameter or larger)
The notch method is used to fell large
trees. A notch is cut on the side of the
tree in the desired direction of fall. After
a felling cut is made on the opposite
side of tree, the tree will tend to fall in
the direction of the notch.
NOTE: If tree has large buttress roots,
remove them before making the notch.
If using saw to remove buttress roots,
keep saw chain from contacting
ground to prevent dulling of the chain.
NOTCH CUT AND FELLING TREE
• Make notch cut by cutting the top of
the notch first. Cut through 1/3 of the
diameter of the tree. Next complete
the notch by cutting the bottom. See
illustration. Once the notch is cut re-
move the wedge of wood from the
tree.
First cut
Notch
Felling cut here
• After removing the wood from the
notch, make the felling cut on the op-
posite side of the notch. This is done
by making a cut about two inches
higher than the center of the notch.
This will leave enough uncut wood
between the felling cut and the notch
to form a hinge. This hinge will help
prevent the tree from falling in the
wrong direction.
Hinge holds tree on stump and helps
control fall
Opening
of felling
cut
Closing
notch
NOTE: Before felling cut is complete,
use wedges to open the cut if neces-
sary to control the direction of fall. To
avoid kickback and chain damage, use
wood or plastic wedges, but never
steel or iron wedges.
• Be alert to signs that the tree is
ready to fall: cracking sounds, widen-
ing of the felling cut, or movement in
the upper branches.
• As tree starts to fall, stop saw, put it
down, and get away quickly on your
planned retreat path.
• DO NOT use your saw to cut down a
partially fallen tree. Be extremely cau-
tious with partially fallen trees that may
be poorly supported. When a tree
doesn't fall completely, set saw aside
and pull down tree with a cable winch,
block and tackle, or tractor.
CUTTING A FALLEN TREE
(BUCKING)
Bucking is the term used for cutting a
fallen tree to the desired log size.
Loading ...
Loading ...
Loading ...