Skidding


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skidding

[′skid·iŋ]
(forestry)
The short distance movement of tree lengths or segments over unimproved terrain to loading points on transportation routes.

Skidding

 

a lumbering operation that consists in the collection of trees from which the branches have been removed (trunks) and hauling them from the cutting area to loading areas on logging routes. The chief means of mechanization in skidding are skidding tractors and winches. Tractors are used on level ground and on mountain slopes with a grade not exceeding 22° (in winter, 14°); one end of the tree, trunk, or log is attached to the tractor, and the other end drags on the ground. In the case of trees, the butt usually rests on the tractor, and in the case of trunks, the top. Depending on the method of collecting the cut lumber, skidding may be done with or without chain or cable chokers. Felling and hauling machines may also be used.

Winch skidding, which involves the use of cable and block systems for semisuspended or suspended hauling of trees, trunks, or logs, is used mostly in mountains and in swampy areas. For example, in high-lead hauling, a carrier moves on a carrier cable stretched between two poles; on the rehaul the carrier brings cable chokers to the felling area, and on the return pass it pulls the logs, trunks, or trees to the loading area. The carrier is driven by traction ropes.

REFERENCE

Vinogradov, G. K. Tekhnologiia lesozagotovok, 2nd ed. Moscow, 1969.

P. I. ABOL

References in periodicals archive ?
The researcher studied the efficiency of Backmund method for evaluation of forest road networks with regard to capabilities of wheeled skidders in ground skidding method and results showed that in order to evaluate the forest road networks from technical point of view with regard to capabilities of wheeled skidders in wood extraction, Backmund method is not precise enough to be the best variant and the limitations of ground skidding should be considered to use this method [15].
The researcher studied the forest road planning considering road and skidding costs and the study used continuous time studies based on empirical data for this logging method.
2000) investigated the effects of ground skidding trees felled during group selection harvests on logging productivity.
Investigating harvesting systems in the Caspian forest in Iran, Sobhany and Stuart (1991) performed a timing study of conventional ground skidding logging operations common in the region.
Used in either a laboratory or at the test site, it gives direct numerical values for the friction between a skidding tire and wet road surface.
Implementation of the forest in the Forest Barnislawice the field of forest management, harvesting and skidding in 2015.
Implementation of Forestry forest in mud in the field of forest management, harvesting and skidding in 2015.
Four areas were selected from the Ouachita and Ozark Mountains in Arkansas to demonstrate the effects of landing placement on skidding distance.
When two or three LZs are used on a tract to reduce skidding distance, the positions of the LZs should be such that the sum of the skidding distances is minimized.
He added: "Statistics prove that 70 per cent of all motoring accidents involve some sort of skidding.
The subject of this contract is to provide services in the form of implementation of mining operations, resulting in a skidding tractor or trailer vyvEi ecE[degrees]m.