Limbing
CAUTION:
Limbing may only be performed by
trained persons. A hazard is presented by the risk
of kickback.
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 train-
ing.
Perform parallel-to-grain cuts at as shallow an angle as
cut as the spike bumper cannot be used.
Felling
CAUTION:
Felling work may only be per-
formed by trained persons.
Observe local regulations if you wish to fell a tree.
2
/
1
1
1. Felling area
—
Before starting felling work, ensure that:
Any person involved has an unhindered path
of retreat through a range of approximately
45° either side of the felling axis. Consider the
45
o
2
45
o
distance of 2 1/2 tree lengths in the direction
in which the tree will fall.
—
Consider the following with respect to each tree:
—
Consider the wind speed and direction. Do not
carry out felling work if the wind is gusting strongly.
horizontal cut.
—
Stand to the side of the falling tree. Keep an area
clear to the rear of the falling tree up to an angle of
45° either side of the tree axis (refer to the "felling
—
An escape path should be planned and cleared
path should extend back and diagonally to the rear
3
1. Felling direction 2. Danger zone 3. Escape route
When felling trees, follow the procedures below:
1.
Cut a scarf as close to the ground as possible.
First make the horizontal cut to a depth of 1/5 -1/3 of the
make the diagonal cut.
NOTE:
the tree will fall, and guides it. It is made on the side
towards which the tree is to fall.
14 ENGLISH
1
2
3
2