The cable yarder extracts full trees and tree
lengths from the stand (buffer 11 & 31) to the forest road (buffer 12 &
32).
The extraction takes place in a carrying
movement. Therefore, a cable is stretched between the tower of the cable yarder,
and a standing tree or a second, mobile tower. On this cable a carriage is
riding which lifts the load into the air and carries it along the cable line. To
have an undisturbed transportation of the load the cable yarding system is
erected on corridors, which are free from trees.
The extraction with a cable yarder is soil friendly
because the cable yarder does not move itself during the extractionprocess and
the load is in the air during the transit. So, the corridor underneath the
cable line does not experience any load. The negative aspect of the cable
yarder is the time-consuming assembly and dismantling, which makes this
extraction option expensive.
The cable yarder is primarily used in the
mountains and in other rough terrain. Working with the cable yarder is considered
as simple mechanized work.