Stihl MSA 160.0 C Instruction Manual page 51

13 Operating the Saw
1
2
► If the limb is under tension: Make the relieving
cut (1) into the compression side and then per‐
form the bucking cut (2) from the tension side.
13.4 Felling
13.4.1 Determining direction of fall and
escape path
► Determine direction of fall so that the area in
which the tree falls is clear.
► Observe the following points when planning
escape path (B):
– Escape path (B) at an angle of 45° to direc‐
tion of fall (A).
– No obstacles on the escape path (B).
– The top of the tree can be observed.
– If the escape path (B) is on a slope, it must
be parallel to the slope.
13.4.2 Preparing work area at base of tree
► Remove obstacles from work area at tree
base.
► Remove growth from tree base.
► If the tree has large, healthy buttress roots:
Make vertical cut first and then a horizontal
cut, and remove the resulting piece.
0458-024-9801-A
13.4.3
2
1
C Felling notch
D Hinge
E Felling cut
F Stabilizing strap
G Holding strap
13.4.4
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.
Basic information on felling cut
C
The felling notch determines the direction of
fall.
The hinge helps control the falling tree. The
width of the hinge is 1/10 of the trunk diame‐
ter.
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.
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.
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.
Cutting the felling notch
English
C E
1/10
Ø
G
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