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Filtering by: Subject Logging, Skyline -- Costs -- Case studies Remove constraint Subject: Logging, Skyline -- Costs -- Case studies Decade 1980-1989 Remove constraint Decade: 1980-1989

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Operational prebunching: a logger's application to reduce skyline thinning costs

Creator:

Zielinsky, Cary Russell

Abstract:

In the Pacific Northwest, loggers are faced with the problems of changing from logging old growth to second growth. This is due to the shrinking old growth timber supply and increased entry into the· second growth stands. Beuter (1 980) indicated that in western Oregon 70.2 percent by volume of...

Resource Type:

Capstone Project
Cable thinning in young forests with average DBH of 5-8 inches : a case study

Creator:

Gabrielli, Robert Michael

Abstract:

This paper describes the results of a time-study conducted near Grand Ronde, Oregon, to determine the production rates and total harvesting costs of a cable thinning in a young stand. The stand had a species mix of 48 percent western hemlock (Tsuga. heterophylla- (Raf.) Sarg.), 45 percent Douglas-fir (Pseudotsuga meuziesil...

Resource Type:

Capstone Project
A comparison of productivity for whole tree, tree length, and log length skyline thinning in 35 year old Douglas-fir stands of western Oregon

Creator:

Putnam, Nathan E.

Abstract:

Whole tree and tree length thinning are two alternatives which are likely to be more productive and may prove to be more cost effective than conventional log length thinning. The purpose of this study was to evaluate and compare log length, tree length, and whole tree thinning techniques in terms...

Resource Type:

Capstone Project
The effects of swinging and sorting with a skidder on yarding and loading efficiency in small diameter Douglas-fir

Creator:

McIntire, John Charles

Abstract:

This study evaluated the impact of using a rubber-tired skidder to keep the landing clear by sorting and decking the logs along the road prior to loading by a self-loading truck. The evaluation was accomplished through detailed time studies conducted on a Koller K-300 yarder, a Crown Super 3000 self-loader,...

Resource Type:

Capstone Project
Load bearing capacity of alder, spruce and hemlock tail trees

Creator:

Pugh, Edwin V.

Abstract:

This paper presents an evaluation of the cable loading support capacity of red alder, Alnus rubra Bong., Sitka spruce, Picea sitchensis (Bong.) Carr, and western hemlock, Tsuga heterophylla (Raf.) Sarg., tail trees. Capacity is measured in terms of combined stress resulting from compression and bending, rather than the traditional methods...

Resource Type:

Capstone Project
Load-deformation characteristics of multiple stump anchor systems

Creator:

Toupin, Richard C.

Abstract:

This paper documents the development of a model which determines multiple stump anchor system displacement as a response to skyline load for four anchor rigging configurations: 1. Series multiple, 2. Tieback, 3. Elevated tieback, and 4. Equalizer block. It also documents the field testing of four two stump anchors rigged...

Resource Type:

Capstone Project

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Academic Affiliation

Forest Engineering6

Advisor

Olsen, Eldon3
Pyles, Marvin R.2

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1980 to 1985

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Committee Member

O'Leary, John1
Sessions, Julian1

Creator

Gabrielli, Robert Michael1
Mcintire, John Charles1
Pugh, Edwin V.1
Putnam, Nathan E.1
Toupin, Richard C.1
more Creators »

Date

Date range begin – Date range end

Current results range from 1980 to 1985

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Decade

1980-1989[remove]6

Degree Field

Forest Engineering6

Degree Level

Master's6

Degree Name

Master of Forestry (M.F.)6

Language

English [eng]6

Peer Reviewed

No6

Resource Type

Capstone Project6

Rights Statement

Copyright Not Evaluated6

Subject

Logging, Skyline -- Costs -- Case studies1
Logging, Skyline -- Equipment and supplies -- Cost effectiveness -- Case studies1
Logging, Skyline -- Equipment and supplies -- Evaluation -- Case studies1
Logging, Skyline -- Equipment and supplies -- Testing -- Case studies.1
Logging, Skyline -- Oregon -- Cost effectiveness -- Case studies1
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