Download or read book Yarding and Loading Costs for Salvaging in Old-Growth Douglas-Fir with a Mobile High-Lead Yarder (Classic Reprint) written by John Carow and published by Forgotten Books. This book was released on 2017-10-29 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Yarding and Loading Costs for Salvaging in Old-Growth Douglas-Fir With a Mobile High-Lead Yarder This report describes the use of a mobile high-lead yarder to salvage dead and down timber in old-growth stands reserved for future cutting under the staggered-setting system of management. Atime and production study of the yarding Operation, and regression analyses of the data revealed the factors affecting each step in the yarding sequence. Results of the analyses permit pre diction of yarding time per turn for different yarding distances and log sizes under conditions similar to those encountered on the study area. Also, an equation was developed to relate loading time to the number of logs per load. Data on yarding costs were obtained by application of the yarder operating-cost rate to yarding times. A consideration of the geometry involved in yarding to landings along contour roads brought in other related logging costs-cab1e-road changing, moving and rig up, and truck road construction-so that cost data from both the time study and the operator's records could be used to analyze problems of efficient planning. Results indicate limits of volume per acre and log size within which efficient high-lead salvage operations can be planned. A for mula is given for evaluating the effect of these and other variables in determining total yarding, moving, and road costs. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.