2
4
When working at a slope take always the position above or
on the side of the trunk or the lying sawing material
respectively. Pay attention to rolling trunks.
Additional advices for sawing timber under
tension/release
If perches, trees or wood under tension become free of tension
by sawing extreme caution is demanded. The sawing material
can react completely uncontrolled and result in heavy injuries or
death.
Such works shall only be carried out by instructed
specialists.
Ö
/
Ö
/
Ö
/
Ö
For all works set always first of all on the pressure side
n
the releasing cut and then the dividing cut
o
-
otherwise the
chain saw can jam or strike back.
Ö
Upper side of wood under tensile stress
n
Place one cut (one third of the diameter of the trunk) from
the bottom up.
o
Then place a second cut on the same point from top which
cuts through the trunk.
Ö
Underside of wood under tensile stress
n
Place one cut (one third of the diameter of the trunk) from
top to bottom.
o
Then place a second cut on the same point from bottom
which cuts through the trunk.
Ö
Strong trunks and strong tension
n
Place one cut (one third of the diameter of the trunk) from
buttom up.
o
Then place a second cut with distance to the first cut from
top which cuts through the trunk.
Ö
Cutting off of perches
B
For horizontal branches without being top heavy
The branch section falls down in a controlled manner
without tipping over.
n
Set the first cut from below, approx. one third of the branch
diameter.
o
The second cut is made on the same level as the first cut
or moved further toward the inside (negative breaking
step).
p
Remove the remaining branch section.
Additional advices for chopping down trees
Such works shall only be carried out by instructed
specialists.
Pay attention to the length of the guide bar. Only those trees
are allowed to be cut which have a trunk diameter which is
smaller than the length of the guide bar.
Ö
Safeguard the dangerous zone (D) before cutting.
Make sure that there are no persons or animals in the
fall area. Danger to life!
Ö
Make sure that the working area around the trunk is
free of risk to stumble and that you have an escape route (F)
which is free of obstacles.
Ö
Before cutting the tree down decide on the felling
direction (C). Before chopping the tree decide on the
chopping direction.
Consider in this case the balance point
of the treetop, neighbour trees, slope direction, state of
health of the tree and the wind direction.
On this side the
kerf is cut in.
Remove interfering branches, scrub and obstacles from the
working area at the trunk and make sure that you have a
safe standing position.
Thoroughly clean the trunk foot – sand, stones and other
foreign objects make the saw chain edgeless or may
damage it.
Consider the state of health of the tree – be careful with
trunks with damages or deadwood (droughty, rotten or dead
wood).
Chopping a tree:
Â
Cut a kerf with the saw of approximately one third of the
tree diameter into the trunk. First of all place the
horizontal cut and then as secondly a cut from top in an
angle of 45°.
Â
Shout the warning "Caution" or "Tree is falling"
before starting the fell cut.
Â
Now saw on the opposite side of the trunk a horizontal
chopping cut.
This cut should be placed a bit higher
(appr. 4 cm) than the horizontal cut of the kerf.
Â
By no means cut through the trunk.
Appr. 1/10 of the
trunk diameter must remain.
If the tree starts falling
ahead of time pull out the chain saw immediately out of
the cut and step back or to the side.
Â
Push a key into the horizontal chopping cut in order to
make the tree falling.
Â
Pay attention, when tree starts falling, to perches or
twigs falling down.
