Stihl MSA 300.0 Manual De Instrucciones página 50
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Ver también para MSA 300.0:
- Manual de instrucciones (468 páginas) ,
- Manual de instrucciones (140 páginas)
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► If the tree has large, healthy buttress roots:
Make vertical cut first and then a horizontal
cut, and remove the resulting piece.
11.6.3
Basic information on felling cut
C
C Felling notch
The felling notch determines the direction of
fall.
D Hinge
The hinge helps control the falling tree. The
width of the hinge is 1/10 of the trunk diame‐
ter.
E Felling cut
The tree is felled with the felling cut. The fell‐
ing cut is 1/10 of the trunk diameter (at least 3
cm) above the bottom of the felling notch.
F Stabilizing strap
The stabilizing strap supports the tree and
helps prevent it from falling prematurely. The
width of the stabilizing strap is 1/10 to 1/5 of
the trunk diameter.
G Holding strap
The holding strap supports the tree and helps
prevent it from falling prematurely. The width
of the holding strap is 1/10 to 1/5 of the trunk
diameter.
11.6.4
Cutting a Felling Notch
The felling notch determines the direction in
which the tree will fall. Country-specific stand‐
ards for making the felling notch must be
observed.
1
50
C
E
1/10
Ø
G
► Position the chainsaw so that the felling notch
is at a right angle to the felling direction and
the chainsaw is close to the ground.
► Control the felling direction with the felling
notch (1).
► Make the horizontal cut.
► Make the angled cut at 45° to the horizontal
cut.
► If the wood is sound and long-fibered:
Observe the following points when making
sapwood cuts:
– The cuts must be the same on both sides.
– The cuts must be at the same height as the
bottom of the felling notch.
– The width of the cuts is 1/10 of the trunk
diameter.
The trunk does not splinter when the tree falls.
11.6.5
Plunge cutting
Plunge cutting is a technique required for felling.
1.
3.
2.
► Begin cut with the lower portion of the guide
bar nose – with chain running at full speed.
► Cut until depth of kerf is twice the width of the
guide bar.
► Swing the saw into plunge-cutting position.
► Perform the plunge cut
11.6.6
Selecting the Appropriate Felling Cut
The choice of appropriate felling cut depends on
the following conditions:
– The natural inclination of the tree
– The tree's branch formation
– Damage to the tree
– The tree's state of health
– If there is snow on the tree: the snow load
– The direction of slope
11 Operating the Saw
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