13
EN
GL
IS
H
8. Sawing trees that are under tension or compression
Warning!
Be careful when cutting branches that are under tension or compression.
Size up the job and work out how the tree or branch is bowed before starting to saw. If you saw into wood that
is under compression, the saw could get stuck; if you saw into wood that is under tension, the wood could split
and spring back unexpectedly.
2
1
2
3
1
2
1
2
3
1
2
1
2
3
1
Tension
Tension
Tension
Compression
Compression
Compression
The top of the wood is under tension and
the bottom of the wood is under compression.
Warning:
The wood will spring upwards when
it is cut.
The bottom of the wood is under tension and
the top of the wood is under compression.
Warning:
The wood will collapse when it is cut.
The top of the wood is under tension and the bottom
of the wood is under compression.
Warning:
The tree trunk will spring up with force
and twist when cut and the roots can tip forwards or
backwards. Use extreme caution in this situation!
Both sides of the wood are under stress.
Warning:
The tree trunk can move sideways
when cut. Use extreme caution in this situation!
Fig. 14
Fig. 15
Fig. 16
Summary of Contents for YT4755
Page 83: ...83...
