In 1997, FERIC studied a partial cutting operation in the Interior Cedar-Hemlock biogeoclimate zone, on a site west of Kitwanga, B.C. The operation used a Skylead C40 16000 skidder-mounted yarder and Mini-Maki II radio-controlled carriage in a standing skyline configuration and in single-and multi-span applications. The study provided information on productivity and costs for the harvesting system, impact on soil surface conditions, and damage to the residual stand. Productivity functions were derived to predict yarding productivity and costs over a range of operation conditions.
This report summarizes a pilot study that investigated how loads that are applied to skyline systems in second-growth thinning operations affect the line tensions and stress distribution in the backspar. The maximum tension in the skyline occurred when the turn was fully suspended under the carriage. In the backspar that was examined, compression was the critical stress. By recognizing how the critical loads produce stresses on backspars, procedures can be developed that will limit these stresses.
The survey objective was to describe and compare how common cable-yarding systems are currently being applied in Coastal British COlumbia with respect to access requirements. This Field Note summarizes the survey results.
Des tressages légers et résistants tels que ceux en fibres d'aramid (Kevlar TM) et de poléthylène (Spectra TM) sont en usage dans le secteur des pêcheries, de la navigation et pour l'installation de lignes de transport d'électricité. Ce communiqué technique fait le point sur les observations et le commentaires receuillis en 1991 et 1992 sur huit sites différents au Québec et en Ontario.