Stihl MSA 160 C Notice D'emploi page 12

English
Preparing the work area at the trunk
– Clear the work area at the trunk of
branches, brush and other
obstacles – secure footing for all
workers
– Carefully clear the base of the trunk
(e.g., with an axe) – sand, stones
and other foreign objects will dull the
saw chain
– Remove large buttresses: remove
the largest buttress first – saw first
vertically, then horizontally – only if
the tree is in sound condition
Making a felling notch
Several possibilities are permissible
when it comes to the sequence of
horizontal and diagonal cuts – observe
national regulations with regard to felling
technique.
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C
C
The felling notch (C) determines the
direction of fall.
STIHL recommends the following
procedure:
N Make a horizontal cut – in doing so,
check the direction of fall with the
gunning sight
N
Start a diagonal cut at an
approx. 45° angle
N Check the felling notch – then
correct the felling notch, if
necessary
Important:
– Felling notch at right angle to
direction of fall
– As close to the ground as possible
– cut to a depth of approx. 1/5 to 1/3
of the diameter of the trunk
Sapwood cuts
With long-fibered wood, sapwood cuts
prevent the sapwood from splintering
when felling the trunk – saw both sides
of the trunk at the level of the felling
notch base to approx. 1/10 of the
diameter of the trunk – with thicker
trunks, not more than the width of the
guide bar.
Do not use sapwood cuts on diseased
trees.
MSA 160 C