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Making the felling notch
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
guide bar reaches both markings
► Make the top (angled) cut approx. 45°‑ 60° to
the bottom cut
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
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
12
4.4
Sapwood cuts
Sapwood cuts in long-fibered softwood help pre‐
vent sapwood splintering when the tree falls.
Make cuts at both sides of the trunk at same
height as bottom of felling notch to a depth of
about 1/10 of trunk diameter. On large diameter
trees, cut to no more than width of guide bar.
Do not make sapwood cuts if wood is diseased.
4.5
Basic information on felling cut
Basic dimensions
C
The felling notch (C) determines the direction of
fall.
The hinge (D) functions like a real hinge to guide
the tree to the ground.
– Width of hinge: approx. 1/10 of the trunk diam‐
eter
– Never saw through the hinge while felling –
otherwise the tree will fall in a direction other
than the one planned – risk of accident!
– With rotten trunks, leave a wider hinge
The tree is felled with the felling cut (E).
– Cut horizontally
– 1/10 (min. 3 cm) of the width of the hinge (D)
across the bottom of the felling notch (C)
The holding wood (F) or safety strip (G) supports
the tree and secures it against premature falling.
– Width of strip: approx. 1/10 to 1/5 of the trunk
diameter
– Do not cut into the strip during the felling cut
– With rotten trunks, leave a wider strip
4 Working Techniques
C
E
1/10
G
Ø
0458-506-0121-C
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