|
Cable Logging
High Lead logging in Western Oregon 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 cables can be rigged in several configurations. There are two classes; # High lead logging, in which a simple loop of cable runs from the yarder out through pulley blocks anchored to stumps at the far end of the cut. # Skyline, in which a carriage, pulled by hauling cables, runs along a skyline cable, providing vertical lift to the logs. There are other varieties of loading systems as well. While skyline logging requires additional setup, the vertical lift of the skyline allows faster yarding, which can outweigh the additional labor costs, especially on larger harvest units. Since the 1980s grapple yarders have become popular. Skyline and grapple yarding, however, require more complex, and expensiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skyline Logging
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. The skyline's cable loop runs around a drive pulley, generally at the central delivery end, and the return pulley at the collection end; the collection-end pulley may be moved radially to other locations within the constraints of the system, and may operate over large areas. Individual logs are attached to the suspended cable by means of choker cables and carriages. A skyline yarder can pull in 5 to 10 logs at a time, using separate chokers. The pulleys are mounted on towers or cranes, other trees, ridges or, in rare cases, helium balloons. See also * Cable logging High Lead logging in Western Oregon 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Logging
Logging is the process of cutting, processing, and moving trees to a location for transport. It may include skidding, on-site processing, and loading of trees or logs onto trucks or skeleton cars. Logging is the beginning of a supply chain that provides raw material for many products societies worldwide use for housing, construction, energy, and consumer paper products. Logging systems are also used to manage forests, reduce the risk of wildfires, and restore ecosystem functions, though their efficiency for these purposes has been challenged. In forestry, the term logging is sometimes used narrowly to describe the logistics of moving wood from the stump to somewhere outside the forest, usually a sawmill or a lumber yard. In common usage, however, the term may cover a range of forestry or silviculture activities. Illegal logging refers to the harvesting, transportation, purchase, or sale of timber in violation of laws. The harvesting procedure itself may be illegal, includin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yarder
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. It generally consists of an engine, drums, and spar, but has a range of configurations and variations, such as the swing yarder. Early Yarders The early yarders were steam powered. They traveled on railroads, known as "dummylines", and felled trees were dragged or "skidded" to the railroad where they were loaded onto rail cars. Popular brands included Willamette, Skagit, Washington, Tyee, or Lidgerwood and Clyde, built by Clyde Ironworks in Duluth, Minnesota. Although these machines appear to be large and cumbersome, they were highly productive. The Clyde was capable of retrieving logs from four different points at the same time. Each cable, or lead, was approximately 1000 feet in length. Once the logs were attached and a clearance signal was sent for retrieval, the logs could be skidded at a speed of 1000 feet per minute, which is around 10 mp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loader (equipment)
A loader is a Heavy equipment (construction), heavy equipment machine used in construction to move or load materials such as soil, Rock (geology), rock, sand, demolition debris, etc. into or onto another type of machinery (such as a dump truck, conveyor belt, feed-hopper, or railroad car). There are many types of loader, which, depending on design and application, are variously called a bucket loader, front loader, front-end loader, payloader, high lift, scoop, shovel, skip loader, wheel loader, or skid-steer. Description A loader is a type of tractor, usually wheeled, Tracked loader, sometimes on tracks, that has a front-mounted wide Bucket (machine part), bucket connected to the end of two booms (arms) to scoop up loose material from the ground, such as dirt, sand or gravel, and move it from one place to another without pushing the material across the ground. A loader is commonly used to move a stockpiled material from ground level and deposit it into an awaiting dump tru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grapple Yarders
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 ground is relatively flat it may be possible to transport the tree or logs cut from the tree on a wheeled or tracked machine. However if the ground is too steep for the operation of such machinery, it is common practice to rig some sort of a cable system for moving the wood. The swing yarder is one of several varieties of machines that have been used for this purpose. The swing yarder has several drums to pull in the cables. The cables run up an angled boom and then to the far side of a setting. By using two cables set up like a clothes line, the rigging can be pulled out and logs can be pulled across a logging setting where the trees ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Lead Logging
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 a 'tail block' or pulley at the tail (back) end of the logging site, and passes through the tail block and connects to the main line. Butt rigging is installed where the two lines join and the logs are hooked to the butt rigging with chokers. The procedure is to wind up the main line and the logs are pulled in, wind up the haulback and the butt rigging is pulled out for more logs or another 'turn'. The "high lead" feature is added by elevating both lines near the winch or 'head' end. This is accomplished by running the lines through a block (pulley) called the "head block" because it is on the head end of the project. Early on, it wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skyline Logging
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. The skyline's cable loop runs around a drive pulley, generally at the central delivery end, and the return pulley at the collection end; the collection-end pulley may be moved radially to other locations within the constraints of the system, and may operate over large areas. Individual logs are attached to the suspended cable by means of choker cables and carriages. A skyline yarder can pull in 5 to 10 logs at a time, using separate chokers. The pulleys are mounted on towers or cranes, other trees, ridges or, in rare cases, helium balloons. See also * Cable logging High Lead logging in Western Oregon 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yarders
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. It generally consists of an engine, drums, and spar, but has a range of configurations and variations, such as the swing yarder. Early Yarders The early yarders were steam powered. They traveled on railroads, known as "dummylines", and felled trees were dragged or "skidded" to the railroad where they were loaded onto rail cars. Popular brands included Willamette, Skagit, Washington, Tyee, or Lidgerwood and Clyde, built by Clyde Ironworks in Duluth, Minnesota. Although these machines appear to be large and cumbersome, they were highly productive. The Clyde was capable of retrieving logs from four different points at the same time. Each cable, or lead, was approximately 1000 feet in length. Once the logs were attached and a clearance signal was sent for retrieval, the logs could be skidded at a speed of 1000 feet per minute, which is around 10 m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington Iron Works Skidder
The Washington Winch sits in the forests of eastern Victoria near Swifts Creek and is also known as the Washington Iron Works Skidder. Its rusting relics are close to Bentley Plain and the Moscow Villa hut which was built in 1942 by firetower man Thomas William Ah Chow. It was a steam-powered logging skidder, or cable winch. It was one of two machines imported to Western Australia in the 1920s and was initially used by the Karri Timber Company to move the large jarrah logs. It burnt wood as fuel. Both winches were sold to the Forests Commission Victoria for salvaging timber in the Central Highland on the Toorongo Plateau near Noojee after the 1939 Black Friday fires. The machines were able to move large logs up to 800 m by high-lead cables in the wet and steep terrain. They were also capable of lifting logs off the ground, over rocks and creeks back to a central landing. The machine near Swifts creek was later sold and moved to its present site by local sawmilling company Ez ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swing Yarder
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 ground is relatively flat it may be possible to transport the tree or logs cut from the tree on a wheeled or tracked machine. However if the ground is too steep for the operation of such machinery, it is common practice to rig some sort of a cable system for moving the wood. The swing yarder is one of several varieties of machines that have been used for this purpose. The swing yarder has several drums to pull in the cables. The cables run up an angled boom and then to the far side of a setting. By using two cables set up like a clothes line, the rigging can be pulled out and logs can be pulled across a logging setting where the trees ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
