FERREX 25CC, User Manual

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Kapitelüberschrift
22
• Felling work may only be started when it has been ensured that:
a) Only persons involved in the felling work are in the felling area,
b) An obstacle free path to the rear is available for everyone involved in the
felling work (this rearwards path must run straight back at approx. 45°).
c) The trunk base must be free from all foreign bodies, brushwood and
branches. Make sure you have firm footing (risk of stumbling).
d) When felling, maintain a distance of at least 2 1/2 tree lengths from the
nearest person and any other objects!
• Observing the general condition of the tree:
The neutral lean of the tree
- dry and loosely hanging branches - height of the tree -natural overhang -
is the tree rotted?
• Observe the wind direction and speed. Felling work must not be done when
there are strong gusts of wind. Avoid sawdust (pay attention to the wind di-
rection!)
• Cutting the trunk base swelling:
If the tree has large buttress roots, cut into the largest buttresses vertically
first (horizontally next) and remove
• Placing a felling notch:
The felling notch when properly placed determines the direction in which
the tree will fall. It is made perpendicular to the line of fall and should be as
close to the ground as possible. Cut the felling notch to a depth of about 1/3
to 1/5 of the trunk diameter. It should be in no case higher than it is deep.
Make the felling notch very carefully.
• Any notch corrections must be cut across the whole width.
• Begin the felling cut slighty higher than the felling notch and on the op-
posite side of the tree. Then cut horizontally through towards the felling
notch. Apply the chain saw with its spikes directly behind the uncut portion
of wood and cut toward the notch Leave approximately 1/10 of the tree di-
ameter uncut!
• This is the hinge Do not cut through the hinge because you could lose con-
trol of the direction of the fall. Drive wedges into the felling cut where nec-
essary to control the direction of the fall!
• Wedges should be of wood, light alloy or plastic - never of steel, which can
cause kickback and damage to the chain.
• Always keep to the side of the falling tree when felling.
• Watch out for falling libs when moving back after a felling cut.
• When working on a hill make sure to stand on the up-hill side or beside of
the log or lying tree.
Safety regulations