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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).
High lead logging is a method of cable logging using a spar, yarder and loader. It was developed by Oscar Wirkkala. It is accomplished with two lines (cables) and two winches (or cable drums). The mainline or yarding line extends out from one winch, while a second usually lighter line called the haulback line extends out from the other winch to ...
Crane (machine) – Type of machine; Crawler (rigging) Hook – Tool used to grab onto, connect, or attach to something; Hoist (device) – Device used for lifting or lowering a load; Jack (device) – Mechanical lifting device; Knot – Method of fastening or securing linear material
A yarder is piece of logging equipment that uses a system of cables to pull or fly logs from the stump to a collection point. [1] It generally consists of an engine, drums, and spar, but has a range of configurations and variations, such as the swing yarder. Clyde Skidder at Marathon Logging Camp near Newton, MS ~1921 Madill 124 Yarder. An ...
Logging, by a mile. According to the ... “In essence, when the machine on the slope needs to move, the tethering machine provides enough tension on the cable to allow the tethered machine to ...
Skyline logging (or skyline yarding) is a form of cable logging in which harvested logs are transported on a suspended steel cable (a cableway or "highline") from where the trees are felled to a central processing location.
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.
Skidding and cable logging can be more cost efficient for logs further from the road. Shovel logging can make use of the loader between log truck arrivals. It can also reduce soil disturbance, since it requires only a single pass to move all the logs in reach. The machine shown here is typical of the 'shovels' used for shovel logging.