Stihl MS 391 Safety Manual page 10

English
– Establish escape paths for each
worker – approx. 45° diagonally
backwards
– Clear escape paths, eliminate
obstacles
– Put down tools and equipment at a
safe distance – but not on the
escape paths
– When felling, stand only to the side
of the falling trunk and only move
back laterally onto the escape route
– Plan escape routes on slopes
parallel to the slope
– When getting out of the way, watch
out for falling branches and the
crown area
Preparing the work area at the trunk
– Clear the work area at the trunk of
branches, brush and other
obstacles – secure footing for all
workers
– Carefully clear the base of the trunk
(e.g., with an axe) – sand, stones
and other foreign objects will dull the
saw chain
– Remove large buttresses: remove
the largest buttress first – saw first
vertically, then horizontally – only if
the tree is in sound condition
8
Making a felling notch
With the help of the gunning sight on the
shroud and fan housing of the chain
saw, it is possible to check the direction
of fall when cutting the felling notch.
When making the felling notch, orient
the chain saw so that the gunning sight
points precisely in the direction in which
you want the tree to fall.
Several possibilities are permissible
when it comes to the sequence of
horizontal and diagonal cuts – observe
national regulations with regard to felling
technique.
C
C
The felling notch (C) determines the
direction of fall.
STIHL recommends the following
procedure:
N Make a horizontal cut – in doing so,
check the direction of fall with the
gunning sight
N Start a diagonal cut at an
approx. 45° angle
N Check the felling notch – then
correct the felling notch, if
necessary
Important:
– Felling notch at right angle to
direction of fall
– As close to the ground as possible
– cut to a depth of approx. 1/5 to 1/3
of the diameter of the trunk
Chain Saw Safety Manual