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Check direction of fall
Position the saw in the horizontal
N
cut. The gunning sight must point in
the planned direction of fall – if
necessary, correct direction of fall
by re-cutting the felling notch.
Sapwood cuts
Sapwood cuts in long-fibered softwood
help prevent sapwood splintering when
the tree falls. Make cuts at both sides of
the trunk at same height as bottom of
14
felling notch to a depth of about 1/10 of
trunk diameter. On large diameter trees,
cut to no more than width of guide bar.
Do not make sapwood cuts if wood is
diseased.
Basic Information on Felling Cut
Stump dimensions
C
C
E
The felling notch (C) determines the
direction of fall.
The hinge (D) helps control the falling
tree.
Width of hinge: about 1/10 of tree
–
diameter.
To reduce the risk of accidents, do
–
not cut through the hinge – you
could lose control of the direction of
fall.
Leave a broader hinge on rotten
–
trees.
The tree is felled with the felling cut (E).
Cut horizontally.
–
1/10 (at least 3 cm) of width of
–
hinge (D) higher than bottom of
felling notch (C).
The holding strap (F) or stabilizing
strap (G) supports the tree and helps
prevent it from falling prematurely.
Width of strap: about 1/10 to 1/5 of
–
tree diameter.
Do not cut into the strap while
–
making the felling cut.
Leave a broader strap on rotten
–
trees.
1/10
D
Plunge cutting
For relieving cuts during bucking
–
For wood carving
–
G
1.
Use a low kickback chain and
N
exercise particular caution
3.
2.
MS 251 C-Q
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