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A
B
B
A
006915
Cut wood under tension on the pressure side (A) first.
Then make the final cut on the tension side (B). This
prevents the bar from becoming trapped.
Limbing
CAUTION:
Limbing may only be performed by trained
•
persons. A hazard is presented by the risk of kick-
back.
When limbing, support the chain saw on the trunk if
possible. Do not cut with the tip of the bar, as this
presents a risk of kickback.
Pay particular attention to branches under tension. Do
not cut unsupported branches from below.
Do not stand on the felled trunk when limbing.
Burrowing and parallel-to-grain cuts
CAUTION:
Burrowing and parallel-to-grain cuts may only be
•
carried out by persons with special training. The
possibility of kickback presents a risk of injury.
014713
Perform parallel-to-grain cuts at as shallow an angle as
possible. Carry out the cut as carefully as possible, as
the spike bumper cannot be used.
Felling
CAUTION:
Felling work may only be performed by trained
•
persons. The work is hazardous.
Observe local regulations if you wish to fell a tree.
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006917
−
Before starting felling work, ensure that:
(1)
Only persons involved in the felling operation
are in the vicinity;
(2)
Any person involved has an unhindered path
of retreat through a range of approximately
45 ° either side of the felling axis. Consider
the additional risk of tripping over electrical
cables;
(3)
The base of the trunk is free of foreign
objects, roots and ranches;
(4)
No persons or objects are present over a
distance of 2 1/2 tree lengths in the direction
in which the tree will fall.
−
Consider the following with respect to each tree:
Direction of lean;
•
Loose or dry branches;
•
Height of the tree;
•
Natural overhang;
•
Whether or not the tree is rotten.
•
−
Consider the wind speed and direction. Do not
carry out felling work if the wind is gusting strongly.
−
Trimming of root swellings: Begin with the largest
swellings. Make the vertical cut first, then the
horizontal cut.
006918
−
Cut a scarf: The scarf determines the direction in
which the tree will fall, and guides it. It is made on
the side towards which the tree is to fall. Cut the
scarf as close to the ground as possible. First
make the horizontal cut to a depth of 1/5 -1/3 of
the trunk diameter. Do not make the scarf too
large. Then make the diagonal cut.
−
Cut any corrections to the scarf across its entire
width.
12
1. Felling area
45
o
o
45
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