Cutting Branches Under Tension; Blocking - Removing Sections From A Standing; Tree; Conventional Notch - Stihl MSA 161 T Manual De Instrucciones

English
► Make the first cut (1) on the underside (A) of the branch.
Cut through approximately 1/4 of the diameter of the
branch.
► Make the second cut (2) on the top side (B) of the branch,
directly above the first cut.
► Make the third (finishing) cut (3) closer to the trunk,
leaving adjacent bark firmly attached.
Other acceptable techniques for pruning trees can be found
in ANSI A300.
8.3

Cutting Branches under Tension

2
1
A = Compression Side
B = Tension Side
WARNING
￭ There is an increased danger of pinching the chain saw
when cutting branches under tension. The tension in wood
can also release suddenly and with great force, propelling
the limb or chain saw into the saw operator, causing injury
or loss of control.
26
B
A
￭ To reduce the risk of severe or fatal personal injury from
reactive forces, including kickback, or loss of control when
cutting wood under tension:
– Always start with a relieving cut (1) at the
compression side (A) of the branch, and then make
a bucking cut (2) at the tension side (B).
– If a pinch occurs that traps the bar/chain, switch off
the motor, activate the chain brake, remove the
battery and remove the saw from the branch,
exercising caution that the limb does not suddenly
snap or release.
8.4

Blocking - Removing Sections from a Standing

Tree

8.4.1

Conventional Notch

WARNING
￭ These in-tree instructions apply to STIHL top-handle
chain saws, designed exclusively for professional, in-tree
use. For basic instructions on felling a tree from the
ground, please see the instruction manual for your STIHL
rear-handle chain saw.
￭ These basic working techniques are not meant to
substitute for the judgment of an experienced professional
with direct knowledge of on-site conditions. A different
type of notch or working technique may be appropriate for
your particular circumstance. Always exercise good
professional judgment and discretion in determining how
to safely complete a cutting task.
8 Basic Working Technique
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