7
15
16
17
18
19
45°
2
1
/
2
= cutting down area
45°
- Be careful when cutting splintery wood. Cut pieces of wood
may be pulled along (risk of injuries).
- When cutting with the bottom edge of the guide bar, the chain
saw may be pushed in the direction of the user if the chain gets
clamped. For this reason use the top edge of the bar whenever
possible. The chain saw will then be pushed away from you
(15).
- If the timber is not free of tension (16),
Þ
rst cut the pressure
side (A). Then the crosscut can be performed on the tension
side (B). Thus clamping of the guide bar can be avoided.
CAUTION:
People cutting down trees or performing tension releasing
works must be specially trained. High risk of injuries.
-
When releasing the tension, the chain saw should be supported
on the trunk. Do not use the end of the bar for cutting (risk of
kickbacks).
-
Be aware of branches under tension. Do not cut free branches
from below.
- Never perform tension releasing works while standing on the
trunk.
- Before cutting down a tree ensure that
a) only those people are within the working area which are
actually involved in cutting down the tree
b) every worker involved can withdraw without stumbling (the
people should withdraw backwards in a diagonal line, i. e.
at a degree of 45°).
c) the bottom part of the trunk is free from foreign bodies, un-
derbrush and branches. Make sure to have a safe footing
(risk of stumbling).
d) the next working place is at least 2 1/2 tree lengths away
(17). Before cutting down the tree check the direction of fall
and make sure that there are neither any people nor objects
within a distance of 2 1/2 tree lengths.
- Judging the tree:
Direction of hanging - loose or dry branches - height of the tree
- natural hang over - is the tree rotten?
- Take into account the direction and the velocity of the wind. If
strong gusts are occurring, do not perform any cutting down
works.
- Cutting the roots:
Start with the strongest root. First perform the vertical and then
the horizontal cut.
- Notching the trunk
(A, 18):
The notch determines the direction of fall and guides the tree.
The trunk is notched perpendicular to the direction of fall and
penetrates 1/3 -1/5 of the trunk diameter. Perform the cut near
the ground.
- When correcting the cut, always do so over the whole width of
the notch.
-
Cut down
the tree (B, 19) above the bottom edge of the notch
(D). The cut must be exactly horizontal. The distance between
both cuts must be approx. 1/10 of the trunk diameter.
- The
material between both cuts
(C) serves as a hinge. Never
cut it through, otherwise the tree will fall without any control.
Insert felling wedges in time.
-
Secure the cut only with wedges made of plastic or aluminium.
Do not use iron wedges.
- When cutting down a tree always stay sidewards of the falling
tree.
-
When withdrawing after having performed the cut, be aware of
falling branches.
-
When working on a sloping ground the user of the power chain
saw must stay above or sidewards of the trunk to be cut or the
already cut down tree.
- Be aware of trunks which may roll towards you.
Summary of Contents for DCS 9010
Page 27: ...27 Notes...