Owner`s manual

14
Bn TREE FELLING TECHNIQUES
1. PLAN YOUR SAWING OPERATION CARE-
FULLY IN ADVANCE
a. Clear the work area. You need a clear area
all around the tree where you. can have
secure footing.
b. Study the natural conditions that can
cause the tree to fall in a particular direc.
lion. The tree wilt be likely to fall:
1.) In the direction the WIND is blowing
2.) towards the direction of the• LEAN of
the tree
.3-) on the side that is the HEAVIEST with
branches.
coMake sure there is enough room for the
free to fall.
d. Remove dirt, stones, loose bark, nails,
staples_ and wire from the tree where cuts
are to be made.
e.Plan a clear retreat path to the rear and
diagQnat_to the line of fall. Figure 30.
WARNING!
DO NOT CUT
--near electdcal wires or buildings.
--if you do not know the direction of tree fall.
--at night since you will not be able to see well.
--during bad weather--strong wind, snow, rain,
etc.
3. FELLING LARGE TREES--6" DIAMETER
OR MORE
The notch method is used to cut 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 the tree, the tree
will tend to fall into the notch.
a. Make the notch cut. Figure 31.
1.) Cut the bottom of the notch first, about
1!3 of the diameter of the tree.
2.) Complete the notch by making the
slant cut.
Remove the notch of wood.
b. Make the felling cut on the opposite side of
the notch about 2" higher than the bottom
of the notch.
c. Leave enough uncut wood between the fell-
.!rig cut and the n0tch•.to _form a hinge.
Figure 32. ....
NOTE: The hinge helPS to keep the tree
from twisting and falling in the wrong direc-
tion.
d. Use a wedge if there is any chance that the
tree will not fall in the desired direction.
2. FELLING SMALL TREES--LESS THAN 6"
DIAMETER
.a. If you know the direction of fall:
1.) Make a single felling cut on the side
away from the direction of fall.
2.) Cut all the way through.
3_) Stop the saw, put it down, and get away
quickly on your planned retreat path.
b. If you are not sure which way the tree will
fall, use the notch method described for
felling .large trees.
, ,,,
FALL _ t
,_\ 45°
Figure 30
Check the wind
Don't cut down wind.
DON'"
÷
Figure 31
PUT YOURSELF IN THESE POSITIONS
t_ -
Checkth lean
Don'tcut onlean side.
NOTE: Stop cutting before, the felling cut is
complete; use a wedge to open up the cut.
e. Be alert for.signs that the tree is ready to
fall:
1.) cracking sounds
2.) widening of the felling cut
3.) movement in the upper branches.
f. As the tree starts to fall, stop the saw;put it
down, and get away quickly on your plan.
ned retreat path.
OPENING OF
FE LUNG CUT
CLOSING
OF NOTCH
HINGE HOLDS TREE ON STUMP AND
CONTROLS THE FALL,
Figure 32
Checkthebalance
Don't cut On weighted side.