The clam-bunk skidder is a rubber-tired or
tracked machine used for the extraction of trees. Other machines that can be
used for this sub-process are the cable skidder, grapple skidder, skidder with
a loading crane, farm tractor equipped with a forwarding trailer, forwarder,
and cable yarder.
The cable skidder extracts full trees
and tree length from the trail (buffer 21 & 22) to the forest road (buffer 31
& 32). Therefore, the clam-bunk skidder is equipped with an integrated
loader that lifts one end of the tree lengths into an inverted clam. The clam
holds the load during the extractionprocess, resulting into a dragging
movement of the load.