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A choker setter or choke setter is a logger who attaches cables to logs for retrieval by skidders or skylines. [ 1 ] [ 2 ] The work process involves the choker setter wrapping a special cable end (choker) around a log and then moving clear so the yarding engineer (e.g. skidder operator) can pull the log to a central area.
A swing yarder is a mobile piece of heavy duty forestry equipment used for pulling logs from the woods to a logging road with cables. The swing yarder is also known as a grapple yarder. In any logging operation, it is necessary to transport the harvested tree from the stump to a landing for transport to market (usually on a truck). If the ...
Wirkkala invented and developed the high lead method of logging.This skyline (or "spar") method, ideally suited for steep terrain, revolutionized the industry. He also invented important pieces of that industry's machinery used during the first half of the 20th century, including the ubiquitous choker hook.
High Lead logging in Western Oregon Cable grue Larix 3T, installed on agricultural tractor. Cable logging, also referred to as skyline logging, is a logging method primarily used on the West Coast of North America with yarder, loaders, and grapple yarders, but also in Europe (Austria, Switzerland, Czech Republic, France, Italy).
The cable would be attached, and, on signal, the donkey's operator (an engineer) would open the regulator, allowing the steam donkey to drag, or "skid", the log towards it. The log was taken either to a mill or to a "landing" where it would be transferred for onward shipment by railroad, road or river – either send down a flume, loaded onto ...
A gyppo or gypo logger is a logger who runs or works for a small-scale logging operation that is independent from an established sawmill or lumber company. The gyppo system is one of two main patterns of historical organization of logging labor in the Pacific Northwest United States, the other being the "company logger".