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8 Proper Techniques for Basic Bucking, Limbing, Pruning and Felling
8.5 Cutting Logs Under Tension
WARNING
￭ There is an increased danger of pinching the chain saw
when bucking logs under tension. The tension in wood can
also release suddenly and with great force, propelling the
log, limb or chain saw into the saw operator, causing injury
or loss of control. To reduce the risk of severe or fatal
personal injury from reactive forces, including kickback, or
loss of control when cutting wood under tension:
– Always start with a relieving cut (1) at the
compression side of the log, and then make a
bucking cut (2) at the tension side.
– If a pinch occurs that traps the bar/chain, switch off
the motor, activate the chain brake, remove the
battery and remove the saw from the log, exercising
caution that the limb does not suddenly snap or
release.
￭ Working in areas where logs, limbs and roots are tangled
("blow down" areas) is extremely dangerous.
– Drag the logs, limbs and other material to be cut into
a clear area before cutting. Pull out exposed and
cleared logs first. Do not cut where the tip of the bar
may come into contact with other logs, limbs or leafy
material.
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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