12.4.3 Cutting the felling notch
The felling notch determines the direction in
which the tree falls. Country-specific standards
for making the felling notch must be observed.
► Position the saw so that the felling notch is an
right angles to the direction of fall and the saw
is close to the ground.
► Make the horizontal cut.
► Make the angle cut at 45° to the horizontal cut.
► If the wood is sound and long-fibered:
Observe the following points when making
sapwood cuts:
–
The cuts must be the same at both sides.
–
The cuts must be at the same height as the
bottom of the felling notch.
–
The width of the cuts is 1/10 of the trunk
diameter.
The trunk does not splinter when the tree falls.
12.4.4 Basic information on felling cut
Ø
1/10
0000-GXX-1251-A1
C
C
E
G
C Felling notch
The felling notch determines the direction of
fall.
D Hinge
The hinge helps control the falling tree. The
width of the hinge is 1/10 of the trunk diame‐
ter.
E Felling cut
The tree is felled with the felling cut. The fell‐
ing cut is 1/10 of the trunk diameter (at least 3
cm) above the bottom of the felling notch.
F Stabilizing strap
The stabilizing strap supports the tree and
helps prevent it from falling prematurely. The
width of the stabilizing strap is 1/10 to 1/5 of
the trunk diameter.
G Holding strap
The holding strap supports the tree and helps
prevent it from falling prematurely. The width
of the holding strap is 1/10 to 1/5 of the trunk
diameter.
12.4.5 Plunge cutting
Plunge cutting is a technique required for felling.
► Begin cut with the lower portion of the guide
bar nose – with chain running at full speed.
► Cut until depth of kerf is twice the width of the
guide bar.
► Swing the saw into plunge-cutting position.
► Perform the plunge cut.
12.4.6 Selecting the Appropriate Felling Cut
The choice of appropriate felling cut depends on
the following conditions:
–
The natural inclination of the tree
–
The tree’s branch formation
–
Damage to the tree
–
The tree’s state of health
–
If there is snow on the tree: the snow load
–
The direction of slope
–
Wind direction and speed
–
Nearby trees, if any
There are different features of these conditions.
Only two features are described in this Instruc‐
tion Manual.
12 Operating the Saw English
0458-022-8301-A 21
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