Danger zoneENGLISH
A danger zone surrounds the tree to a distance of Notch depth should be around 1/4 of the
diameter of the tree and the angle should
2 1/2 times the height of the tree. See to it that no one is
standing within this zone while you are felling the tree.be around 45.
Felling direction
The line de ned by the inside angle of the
When felling a tree, one always aims to place it where neither
notch must be precisely horizontal and
objects nor dif cult terrain will hamper limbing and cutting.
at a precise right angle to the direction
Unobstructed movement and secure footing are essential.
of fall.
It is also important to avoid lodging the tree against another
tree. A lodged tree is extremely dangerous.
Felling cut
The felling cut is done from the opposite
After determining where you want the tree to fall, you must
side of the tree and must also be
also consider the likely unaided direction of fall. This is
horizontal. Stand with the tree to your left
affected by the straightness and lean of the tree, wind direc-
and cut with the bottom of the guide bar
tion, concentration of branches and any snow that may weigh
(pulling chain).
the tree down.
After assessing all these factors, you may nd you have no
Place the FELLING CUT approximately
choice but to fell the tree in its natural direction of fall because 3-5 cm (1 1/2 - 2) above the BOTTOM
your preferred direction of fall is likely to fail.
NOTCH CUT.
Another important factor affecting your personal safety, though
it has no bearing on the direction of fall, is the presence of any
Cut at full motor speed, feeding the saw
dead branches which could fall while you are felling the tree.
slowly into the tree. Watch out for tree
movement opposite to the intended direc-
Clearing branches/Line of retreattion of fall. Insert a WEDGE or FELLING
BAR in the FELLING CUT as soon as the
Remove any branches from around
Planned Direction of fall depth of the cut permits.
the base of the tree which may in-
terfere with your work. It is safest to
Danger zone
work from the top down and to keep
When complete, the FELLING CUT must
the tree trunk between you and the
RetreatRetreat
be parallel to the notch and leave a
running chain. Never cut branches
Danger zone
strip of HINGE WOOD at least 1/10 the
above shoulder height. Clear under-
diameter of the tree.
growth around the tree and identify
your line of retreat or escape, taking note of any obstructions
(stones, branches, holes, etc.).Your line of retreat should be at
The HINGE WOOD acts as a hinge,
an angle, around 135 behind the direction of fall.
steering the direction of the falling tree.
Felling
If the HINGE WOOD is too small or has
Three cuts are made to fell a tree. The TOP NOTCH CUT
been sawn through, or if the
and the BOTTOM or HORIZONTAL NOTCH CUT forms
notch and the felling cut are
the NOTCH, which determines the direction in which the
mismatched, the tree is no
tree will fall. The nal cut is the FELLING CUT, which allows
longer under control.
the tree to topple over.
Notch
As the felling cut approaches the notch,
To form the NOTCH, start with the TOP
the tree should start falling, either by
NOTCH CUT. Using the bottom of the
itself or with the help of a WEDGE or
guide bar (pulling chain), make a 45
FELLING BAR.
downward angled cut at right angles to
the intended direction of fall.
Next do the BOTTOM NOTCH CUT,
ensuring that it meets the bottom of the
TOP NOTCH CUT precisely.
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ACEC
HUSQVARNA
