felling back cut so enough wood is left to act as a hinge. The hinge | |||
wood keeps the tree from twisting and falling in the wrong | |||
direction. Do not cut |
| Q |
|
through the hinge. |
| 2 (5cm) | |
• (Figure Q) As the | DIRECTION | ||
felling cut gets close to | INCHES FELLING BACK | ||
the hinge the tree | OF FALL | CUT | |
should begin to fall. If | 2 (5cm) | ||
there is any chance that |
|
| |
the tree may not fall in |
| NOTCH | INCHES |
the desired direction or |
|
| |
it may rock back and |
|
| HINGE |
bind the saw chain, |
|
| |
stop cutting before the |
|
|
|
felling cut is complete |
|
|
|
and use wedges to open the cut and drop the tree along the | |||
desired line of fall. When the tree begins to fall remove the chain | |||
saw from the cut, stop the motor, put the chain saw down, then | |||
use the retreat path planned. Be alert for overhead limbs falling | |||
and watch your footing. |
|
|
|
Limbing (figure R) |
| R |
|
Limbing is removing the |
|
| |
branches from a fallen |
| LIMB CUT |
|
tree. When limbing, leave |
|
| |
larger lower limbs to |
|
|
|
support the log off the |
|
|
|
ground. Remove the |
|
|
|
small limbs in one cut. |
|
|
|
Branches under tension |
|
|
|
should be cut from the |
|
|
|
bottom up to avoid binding | KEEP WORK OFF GROUND. LEAVE | ||
the chain saw. Trim limbs |
| ||
from opposite side |
| SUPPORT LIMBS UNTIL LOG IS CUT | |
keeping tree stem between you and saw. Never make cuts with saw | |||
between your legs or straddle the limb to be cut. |
Bucking |
|
|
| |
| Bucking is cutting a felled tree or log into lengths. How you should | |||
| cut depends on how the log is supported. Use a saw horse | |||
| (figure W) whenever possible. |
| ||
| Always start a cut with the chain running at full speed and the | |||
| ribbed bumper (7) in contact with the wood. To complete the cut | |||
• | use a pivoting action of the ribbed bumper against the wood. | |||
(Figure S) When |
| S | CUT FROM TOP | |
| supported along its | (OVERBUCK) | ||
| whole length |
|
| |
| Make a cut from the |
|
| AVOID CUTTING |
| top (overbuck), but |
|
| EARTH |
| avoid cutting the earth |
|
| |
| as this will dull your |
|
|
|
| saw quickly. |
|
|
|
• | (Figure T) When | T |
| 2nd CUT |
| supported at |
| ||
| one end |
|
| OVERBUCK (2/3 |
| First, cut 1/3 the |
| 2 | DIAMETER) TO |
| diameter from the |
| MEET 1st CUT (TO | |
| underside |
|
| AVOID PINCHING) |
| (underbuck). |
|
|
|
| Then make the |
|
| 1st CUT UNDERBUCK (1/3 |
| finished cut by |
|
| |
| overbucking to |
|
| DIAMETER) TO AVOID |
| meet the first cut. |
|
| SPLINTERING |
14