Solutions for pre-skidding and skidding of tree lengths
In some cases, the sub-process of pre-skidding is
not necessary and can be skipped. Then, the tree lengths are skidded directly
from the stand (buffer 12) to the forest road (buffer 32).
This may be the case, if there are no
regulations for the machines to stay on a permanent trail or if the technology
of the machines makes the sub-process of pre-skidding unnecessary.
Machines which can skid tree lengths directly are
for example the cable yarder or the cable skidder. While the cable yarder skids
the tree lengths in a carrying movement to the forest road, the cable skidder
needs to drag the tree lengths.
