Ribiland PRTRT300 Manual De Instrucciones Y Mantenimento página 27

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operator's harness:
a) Choke the strop around the attachment point on the rear of the saw (A);
b) Provide suitable karabiners to allow indirect
the strop) and direct attachment (i.e. at the attachment point on the saw) of saw to the operators
harness;
c) Ensure the saw is securely attached when it sent up to the operator;
d) Ensure the saw it secured to the harness before disconnected from the means of ascent.
The saw should only be attached to the recommended attachment points on the harness. These may
be at mid-point (front or rear) or at the sides. Where possible attaching the saw to centre rear
mid-point will keep it clear of climbing lines and support its weight centrally down the operator's
spine.
When moving the saw from any attachment point to another, operators should ensure it is secured in
the new position before releasing it from the previous attachment point.
Using the chainsaw 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 witch allows them to
hold both handles of the saw.
This results in an increased risk of injury due to:
- not having a firm grip on the saw if it kicks back;
- a lack of control of the saw such that it is more liable to contact climbing lines and operators body
(particularly the left hand and arm)
- losing control from insecure work position resulting in contact with the saw (unexpected
movement during operation of the saw)
Securing the work position for two-handed use
To allow the operator to hold the saw with both hands, they should as general rule, aim for secure
work position where they are operating the saw at:
- hip level when cutting horizontal sections;
and
- solar plexus level when cutting vertical sections.