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SAFETY MEASURES
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 E4).
One-handed use of the chain-saw
Operators should not use tree service chain-saws one-handed when work position is unstable or in
preference to a handsaw when cutting small diameter wood at the 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 E5).
Operators should never
• cut with the kickback zone at the tip of the chain-saw guide bar,
• "hold and cut" sections, or
• attempt to catch falling sections.
Freeing a trapped saw
It the saw becomes trapped during cutting, operators should
• 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,
• 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.
11
E4
E5
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