branch tips.
Tree service chain-saws should only be used one-handed where
-
operators cannot gain a work position
enabling two-handed use, and
-
they need to support their working
position with one hand, and
-
the saw is being used at full stretch, at
right angles to and out of line with the
operator’s body (see Figure B.5).
Figure B.5 — Example of one-handed chain-saw use
Operators should never
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cut with the kickback zone at the tip of the chain-saw guide bar,
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“hold and cut” sections, or
-
attempt to catch falling sections.
Freeing a trapped saw
It the saw becomes trapped during cutting, operators should
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switch off the saw and attach it securely to the tree inboard (i.e. towards the trunk
side) of the cut or to a separate tool line,
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pull the saw from the kerf whilst lifting the branch as necessary,
-
if necessary, use a handsaw or second chain saw to release the trapped saw by
cutting a minimum of 30 cm away from the trapped saw.
Whether a handsaw or a chain-saw is used to free a trapped saw, the release cuts
should always be outboard (toward the tips of the branch), in order to prevent the saw
being taken with the section and further complicating the situation.
Summary of Contents for CN-25
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