159
GB
• Small trees, with a diameter of 15-18 cm,
can usually be sawn off with one cut.
• In case of trees with a larger diameter,
a notched cut and a back cut must be
implemented (see diagram
Q
).
Do not fell any trees when a
strong or changing wind is
blowing, if the danger of prop
-
erty damage exists or if the tree
could fall on electric wires.
Before felling, the natural inclina-
tion of the tree, the location of larg-
er branches and the wind direction
should be taken into account, in
order to assess the direction of the
tree’s fall.
Immediately after termination of
the sawing procedure, remove the
ear protection so that you can hear
hooter and alarm signals.
1.
Removal of branches
:
Remove hanging branches by
positioning the cut from above
the branch. With removal of
branches, never work higher
than shoulder level.
P
2.
Escape area:
Remove the undergrowth
around the tree to ensure an
easy escape. The escape area
(1) should be around 45° either
side behind the planned felling
direction (2).
Q
3.
Cutting notch (A):
Make a felling notch in the di-
rection in which you wish the
tree to fall. Start with the bot-
tom, horizontal cut. The cut
depth should be around 1/3 of
the trunk diameter. This will pre-
vent the saw chain or the guard
rails from jamming when placing
the second chamfer. Now make
a slanted saw cut from above at
an angle of roughly 45° to meet
exactly with the bottom saw cut.
Never step in front of a tree
which is notched.
Q
4. Felling back cut (B):
Make the back cut from the
other side of the log, where you
stand to the left of the log and
saw with the chainsaw pulling.
The back cut must run horizon-
tally 5 cm above the horizontal
notched cut. Make the felling cut
parallel to the horizontal notch
cut.
The back cut should be so deep
that the separation distance
between the back cut and the
notch cutting line is at least 1/10
of the trunk diameter. The part
of the stem not sawn through is
called a stay (felling gib). The
stay prevents the tree from turn-
ing and falling in the wrong di-
rection. Do not saw through the
stay.
R
5. As you approach the felling cut
on the stay the tree should start
falling. If it becomes apparent
that the tree may not fall in the
required direction or is leaning
back, and the saw chain is jam-
ming, stop felling and use wedg-
es made of wood, plastic or alu-
minium to open the cut and to
tilt the tree in the required felling
line.
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