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Keep an escape route (Fig. A)
Before felling, an escape route has to be planned
(Fig. A).
Item 2: Position in which the tree falls
Felling of large trees - only with appropriate
training (15 cm in diameter)
Fell large trees using the notch method. Here, a
desired direction of fall. After a cut has been made
on the case of the other side of the tree, the tree will
fall in the direction of the wedge.
m
be removed before making the notch. If the saw is
used to remove the prop roots, the chain should
not touch the ground, to prevent it from becoming
become blunt.
Undercut and felling of the tree (Fig. B-C)
• Saw a wedge with a depth of 1/3 of the tree
diameter at a right-angle to the falling direction.
No. 1). This will prevent the saw chain or the guide
bar becoming jammed when the second wedge cut
(Fig. B, No. 2) is made.Now remove the excised
wedge.
•
on the opposite side of the tree. Do this at
Make the dropping cut parallel to the horizontal
to a depth so that a bridge (No. 4) (holding wood)
remains which can act as a hinge. The bridge
prevents the tree from turning and falling in the
wrong direction. Do not cut through the bridge.
Note: When the dropping cut is made close to the
bridge, the tree should start falling. If it looks like
or it leans back and traps the saw chain, stop the
dropping cut and use wedges of wood. plastic or
aluminium to open the cut and to tilt the tree into the
required falling direction.
When the tree starts falling, remove the chainsaw
danger zone via the planned escape route. Look out
for falling branches and do not trip.
• Be alert to signs that the tree is starting to fall:
cracking sounds, widening of the felling cut, or
movement in the upper branches.
•
with a cable winch, block and tackle, or tractor.
•
• Press the casing of the chain saw against the log
•
pressure.
•
lean towards the end of the incision so there is no
pressure on the saw.
Felling Trees – Only after appropriate training
Caution: Watch for broken or dead branches that
not know in which direction the felled tree could fall.
predict the the direction in which the tree could fall.
•
• The work area around the tree should be clear
•
side of the terrain as the tree is expected to roll
or slide after felling.
• Check for broken or dead branches, which can
which a tree falls:
• Wind direction and speed.
•
visible due to uneven or sloping terrain.
Determine the lean of the tree using a solder or
a spirit level.
• Branch growth (and hence weight) on one side
• Surrounding trees and obstacles.
If two or more people are involved in the cutting and
felling, the distance between those who are felling
and cutting should be at least twice the height of the
tree to be felled. When felling trees, make sure that
not hit and that no material damage is caused. If a
a distance of 2 1/2 tree lengths from the nearest
person or other objects. Engine noise can drown out
a warning call.
Remove dirt, stones, loose bark, nails, staples, and
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