17
English
diagonally to the rear of
the expected line of fall.
()
• Before felling is started,
consider the natural
lean of the tree, the
location of larger
branches and the wind
direction to judge which
way the tree will fall.
Have wedges (wood,
plastic or aluminum)
and a heavy mallet handy. Remove dirt, stones, loose bark, nails,
staples, and wire from the tree where the felling cuts are to be
made.
• Notching Undercut - Make the notch 1/3 of the diameter of the
tree, perpendicular to the direction of the fall. Make the lower
horizontal notching cut first. This will help to avoid pinching of
either the saw chain or the guide bar when the second notch cut
is being made ().
• Felling Back Cut - Make the felling back cut at least 2 inches
(51mm) higher than the horizontal notching cut. Keep the felling
back cut parallel to the horizontal notching cut. Make the felling
back cut so enough wood is left to act as a hinge. The hinge wood
keeps the tree from twisting and falling in the wrong direction.
Do not cut through the
hinge ().
• As the felling cut gets
close to the hinge the
tree should begin to fall.
If there is any chance
that the tree may not fall
in the desired direction
or it may rock back and
bind the saw chain, stop
cutting before the felling
cut is complete and use wedges to open the cut and drop the
tree along the desired line of fall. When the tree begins to fall
remove the chain saw from the cut, stop the motor, put the
chain saw down, then use the retreat path planned. Be alert for
overhead limbs falling and watch your footing ().
LIMBING
Removing the branches
from a fallen tree. When
limbing, leave larger lower
limbs to support the log
off the ground. Remove
the small limbs in one cut.
Branches under tension
should be cut from the
bottom of the branch
towards the top to avoid
binding the chain saw as
shown in . Trim limbs from opposite side keeping tree stem
between you and saw. Never make cuts with saw between your legs
or straddle the limb to be cut.
WARNING:
Cutting a felled tree or
log into lengths. How you
should cut depends on
how the log is supported.
Use a saw horse
( ) whenever
possible.
FIG. 18
FIG. 19
DIRECTION
OF
FALL
RETREAT
45°
TREE
FIG. 16
2 (5cm)
INCHES
DIRECTION
OF FALL
2 (5cm)
INCHES
HINGE
NOTCH
FELLING BACK
CUT
FIG. 17
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