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11 Operating the Saw
► Observe the following points when planning escape path
(B):
– Escape path (B) at an angle of 45° to direction 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.
11.9.2 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.
11.9.3 Basic information on felling cut
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 diameter.
E Felling cut
The tree is felled with the felling cut. The felling 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.
11.9.4 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.
B
B
0000-GXX-1246-A0
Ø
1/10
0000-GXX-1251-A1
C
C
E
G
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