Felling; Felling Conditions - Stihl MSA 120 C Manual De Instrucciones

English
8.6

Felling

8.6.1

Felling Conditions

Felling is cutting down a tree. Before felling a tree, carefully
consider all of the conditions that may affect the direction of
fall.
WARNING
￭ This chain saw is not designed for felling large trees, and
using it to cut large trees could result in an inability to
control the fall of the tree or limb, and can lead to serious
or fatal personal injury.
￭ There are a number of factors that may affect and change
the intended direction of fall, e.g. wind direction and
speed, lean of tree, surrounding trees and obstacles,
sloping ground, one-sided limb or foliage structure, wood
structure, decay, snow load, etc.
– To reduce the risk of severe or fatal injury to yourself
or others, look for, analyze and plan for these
conditions prior to beginning the cut, and be alert for
a change in direction while the tree is falling.
￭ Felling a tree that has a diameter greater than twice the
effective cutting length of the guide bar requires use of
either the sectioning felling cut or plunge-cut method.
Neither of these cutting techniques is recommended for
this model chain saw. These methods can be extremely
dangerous because they involve the use of the nose of the
guide bar and can result in kickback. Only properly trained
professionals should attempt these techniques. If you are
inexperienced with a chain saw, plunge-cutting should not
be attempted. Seek the help of a qualified professional.
￭ Never attempt to cut a large diameter tree with a chain
saw that lacks sufficient size, power or run-time to
complete the task efficiently and without re-charging.
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8 Proper Techniques for Basic Bucking, Limbing, Pruning and Felling
￭ There is an increased risk that trees that are split,
decayed or rotted inside or that are leaning or otherwise
under tension could snap or split while being cut, causing
serious or fatal injury to the operator or bystanders.
– Always observe and be aware of the general
condition of the tree.
– Inexperienced users should never attempt to cut
such trees.
– Also look for broken or dead branches which could
vibrate loose and fall on the operator during the
felling operation. Certain types of trees are more
susceptible to this condition, such as Douglas firs.
You should check with a reputable tree service if you
have questions about the stability of the trees you
will be cutting.
– When felling on a slope, the operator should stand
on the uphill side if possible.
When felling:
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► Maintain a distance of at least 2 1/2 tree lengths from the
nearest person.
► Take extra precautions in the vicinity of roads, railways
and power lines. Inform the police, utility company or
railway authority before beginning to cut.
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