Neilsen CT2298, Original Instructions Manual

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Using the chain-saw in the tree
An analysis of accidents with these saws during tree service operations shows the
primary cause as being inappropriate one-handed use of the saw. In the vast majority
of accidents, operators fail to adopt a secure work position that allows them to hold
both handles of the saw. This results in an increased risk of injury due to
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Not having a firm grip on the saw if it kicks back,
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A lack of control of the saw, such that it is more likely to come into
contact with climbing lines and the operator’s body (particularly the left
hand and arm), and
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Loss of control owing to an insecure work position and resulting in contact with
the saw (unexpected movement during operation of the saw).
Securing the work position for two-handed use
In order to allow the saw to be held with both hands, as a general rule operators
should aim for a secure work position in which they operate the saw at
- Hip level, when cutting horizontal sections, and
- Solar plexus level, when cutting vertical sections.
Where the operator is working close
into vertical stems with low lateral
forces on the work position, then a
good footing could be all that is
needed to maintain a secure work
position. However, as operators
move away from the stem, they will
need to take steps to remove or
counteract the increasing lateral
forces by, for example, a redirect of
the main line via a supplementary
anchor point or use of an adjustable
strop direct from the harness to a
supplementary anchor point (see
Figure B.3).
Figure B.3
— Example of redirection of main line via supplementary anchor point
Gaining a good footing at the working position can be assisted by the use of a
temporary foot stirrup created from an endless sling (see Figure B.4).