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4 Working Techniques
– Remove largest buttresses: first the largest
buttress – saw first vertically, then horizontally
– only if the tree is in sound condition
4.3
Felling notch
Preparing the felling notch
C
The felling notch (C) determines the direction of
fall.
Important:
– Make a felling notch at right angle to direction
of fall
– Saw as close to the ground as possible
– Cut to a depth of approx. 1/5 to 1/3 of the
diameter of the trunk
Specify the direction of fall – without the gunning
sight on the shroud and fan housing
If the chain saw is designed without the gunning
sight on the shroud and fan housing, the direc‐
tion of fall can be determined or controlled using
a meter stick:
► Snap the meter stick in the middle and create
an isosceles triangle
► Position both ends of the meter stick in the
front trunk area (1/5 to max. 1/3 of the trunk
diameter) – align the tip of the meter stick in
the defined direction of fall
► Mark the trunk at both ends of the meter stick
to limit the felling notch
0458-764-0121-B
Making the felling notch
C
When making a felling notch, align the chainsaw
so that the notch lies at a right angle to the direc‐
tion of fall.
During the procedure, various sequences are
permitted for making a felling notch with a bottom
(horizontal) cut and top (angled) cut – comply
with national legislation regarding felling techni‐
que.
► Make the bottom cut (horizontal cut) – until the
► Make the top (angled) cut approx. 45°‑ 60° to
Checking the direction of fall
The bottom cut and top cut must meet in a con‐
tinuous straight sink chord.
► Position the meter stick at the pivot point of
guide bar reaches both markings
the bottom cut
the sink chord – the tip of the meter stick must
point in the direction of the specified direction
of fall – where necessary, correct the direction
of fall by cutting the felling notch accordingly
English
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