| 词条 | Cable logging |
| 释义 |
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;
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 expensive equipment. A traditional highlead or gravity system will function with just two cables, a skidding line. As the names imply the skidding line is used to drag the logs in, and the haulback line is used to drag the skidding line back out for the next turn (or group of logs). A skyline system will add a third line---the skyline whose function is to hold the skidding line and the haulback line off the ground or 'in the sky'. The yarder itself is located on a landing, a flat area on top of the ridge that is being logged. After the trees are retrieved by the yarder, the limbs are bucked (removed) and the logs are then placed in piles awaiting transport. Manufacturers
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2 : Log transport|Logging |
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