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109 records – page 1 of 11.

Analysis of line tensions and backspar stresses in a skyline system: a pilot study

https://library.fpinnovations.ca/en/permalink/fpipub440
Author
Lyons, C.K.
Date
1997
Edition
36677
Material Type
Research report
Field
Fibre Supply
Author
Lyons, C.K.
Date
1997
Edition
36677
Material Type
Research report
Physical Description
8 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Thinning
Stresses
Yarders
Logs
Cable logging
British Columbia
Series Number
Technical Note ; TN-000258
Language
English
Abstract
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.
Cable logging
Skyline
BACKSPARS
Guylines
INTERMEDIATE SUPPORT
Stress distribution
Commercial thinning
Coastal British Columbia
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Éclaircie commerciale

https://library.fpinnovations.ca/en/permalink/fpipub8119
Author
Kingsbury, Nancy
Lewis-Gibbs, Adenieke
Lussier, Jean-Martin
Date
Mai 2021
Material Type
Pamphlet
Field
Fibre Supply
Author
Kingsbury, Nancy
Lewis-Gibbs, Adenieke
Lussier, Jean-Martin
Contributor
Natural Resources Canada (NRC)
Canadian Wood Fibre Centre
Date
Mai 2021
Material Type
Pamphlet
Physical Description
2 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Forest management
Forests
Sustainability
Thinning
Series Number
NRC Impact Story ; 001
Language
French
Abstract
Les chercheurs suggèrent une récolte partielle; dans ce cas, l`éclaircissage des forêts par tranche de 20 ans pendant les périodes de perturbation naturelle des ravageurs. Le résultat est un moyen durable et économique de récolter des arbres et de maintenir des forêts résilientes.
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Commercial thinning a coastal second-growth forest with a Timberjack cut-to-length system

https://library.fpinnovations.ca/en/permalink/fpipub188
Author
Hunt, James A.
Date
January 1996
Edition
36613
Material Type
Research report
Field
Fibre Supply
Author
Hunt, James A.
Date
January 1996
Edition
36613
Material Type
Research report
Physical Description
14 p
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Timberjack
Thinning
Systems
Soil disturbance
Soil
Softwoods
Second growth forests
Second growth
Productivity
Sample
Harvesting
Harvesters
Growth
British Columbia
Series Number
Technical Note ; TN-000235
Language
English
Abstract
Pacific Forest Products Limited began commercially thinning Douglas-fir dominated second-growth forest on southeastern Vancouver Island with mechanized shortwood systems in 1992. In the summer of 1994, FERIC monitored a thinning operation near Cowichan Lake to determine productivities, costs and impacts to sites and residual stands. The thinning treatment was carried out with a Timberjack 1270 harvester and a Timberjack 910 forwarder.
Commercial thinning
Softwoods
DOUGLAS-FIR
Second-growth forests
Harvesting
Cut-to-length systems
SOIL DISTURBANCE
Machine evaluation
Productivity
FMG TIMBERJACK 1270 SINGLE-GRIP HARVESTER
FMG TIMBERJACK 910 FORWARDER
Coastal British Columbia
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Commercial thinning: a comparison of mechanized and manual systems in New Brunswick

https://library.fpinnovations.ca/en/permalink/fpipub3820
Author
Meek, Philippe
Date
August 2001
Edition
40539
Material Type
Research report
Field
Fibre Supply
Author
Meek, Philippe
Date
August 2001
Edition
40539
Material Type
Research report
Physical Description
4 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Thinning
Systems
Studs
Productivity
Harvesting
Costs
Advantage
Series Number
Advantage ; Vol. 2, No. 17
Language
English
Abstract
FERIC studied two commercial thinning systems under comparable conditions. The first involved manual felling, processing, and piling, whereas the second was completely mechanized and used a small single-grip harvester. Two shortwood forwarders with different payload capacities were also studied in this operation. The costs at roadside depended strongly on the hourly wages for the workers. A sensitivity analysis demonstrated that the estimated production costs for the two systems were comparable (at $22.83/m3) when the wages reached $19.22 per scheduled hour.
Commercial thinning
Comparative study
Mechanized method
Manual method
Cut-to-length systems
Harvesting
Extraction
Productivity
Costs
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Commercial thinning for forest health

https://library.fpinnovations.ca/en/permalink/fpipub8118
Author
Kingsbury, Nancy
Lewis-Gibbs, Adenieke
Lussier, Jean-Martin
Date
May 2021
Material Type
Pamphlet
Field
Fibre Supply
Impact Story 001 Canadian Wood Fibre CentreCommercial Thinning for Forest Health In 2020, Dr
Author
Kingsbury, Nancy
Lewis-Gibbs, Adenieke
Lussier, Jean-Martin
Contributor
Natural Resources Canada (NRC)
Canadian Wood Fibre Centre
Date
May 2021
Material Type
Pamphlet
Physical Description
2 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Forest management
Forests
Sustainability
Thinning
Series Number
NRC Impact Story ; 001
Language
English
Abstract
The researchers suggest partial harvesting - in this case, thinning forests in 20-year increments during the natural pest disturbance periods. The result is a cost-effective and sustainable way to harvest trees and maintain resilient forests.
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Commercial thinning in jack pine plantations

https://library.fpinnovations.ca/en/permalink/fpipub485
Author
Gingras, Jean-François
Favreau, Jean
Date
August 1998
Edition
36725
Material Type
Research report
Field
Fibre Supply
of Avenor Inc., conduc- ed a trial of commercial thinning in jack pine plantations ear Maniwaki (Que
Author
Gingras, Jean-François
Favreau, Jean
Date
August 1998
Edition
36725
Material Type
Research report
Physical Description
2 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Pinus
Thinning
Systems
Skidding
Productivity
Plantations
Partial cutting
Costs
Series Number
Field Note ; Partial Cutting-FN-000018
Language
English
Abstract
Commercial thinning
Partial cutting systems
Manual method
CABLE SKIDDING
Delimbing
Plantations
White pine
Productivity
Costs
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Commercial thinning in mule deer winter range

https://library.fpinnovations.ca/en/permalink/fpipub3916
Author
Mitchell, Janet L.
Date
August 2003
Edition
40639
Material Type
Research report
Field
Fibre Supply
Author
Mitchell, Janet L.
Date
August 2003
Edition
40639
Material Type
Research report
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Winter operations
Thinning
Regeneration
Productivity
Costs
British Columbia
Advantage
Series Number
Advantage ; Vol. 4, No. 24
Language
English
Abstract
A commercial thinning study in mule deer winter range was performed in the interior of British Columbia. The commercial thinning was followed by a pre-commercial thinning operation to create a clumpy, multi-storied stand with gaps for regeneration. The Forest Engineering Research Institute of Canada (FERIC) monitored the commercial thinning and pre-commercial thinning operations and determined the costs and productivities of these phases.
Commercial thinning
Precommercial thinning
Mule deer winter range
Regeneration
Costs
Productivity
British Columbia
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Commercial thinning in red pine using a Valmet 544H harvester

https://library.fpinnovations.ca/en/permalink/fpipub184
Author
Ewing, Roderick H.
Lirette, Jacques
Date
December 1995
Edition
36609
Material Type
Research report
Field
Fibre Supply
INTRODUCTION To maximize its growth, plantation-grown red pine re- quires periodic thinning
Author
Ewing, Roderick H.
Lirette, Jacques
Date
December 1995
Edition
36609
Material Type
Research report
Physical Description
2 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Valmet
Thinning
Softwoods
Productivity
Plantations
Pinus
Harvesters
Series Number
Field Note ; Partial Cutting-FN-000008
Language
English
Abstract
Commercial thinning
Softwoods
Red pine
Plantations
Harvesters
Machine evaluation
Productivity
VALMET 544H HARVESTER
Ontario
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Commercial thinning in white spruce stands

https://library.fpinnovations.ca/en/permalink/fpipub40682
Author
Mitchell, Janet L.
Date
August 2004
Material Type
Research report
Field
Fibre Supply
Author
Mitchell, Janet L.
Date
August 2004
Material Type
Research report
Physical Description
12 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Yield
Tree damage
Trees
Thinning
Pinus
Spruce
Regeneration
Productivity
Growth
Costs
Alberta
Advantage
Series Number
Advantage ; Vol. 5, No. 30
Language
English
Abstract
A multi-agency trial was established to determine the impacts of commercial thinning on the growth, yield, and development of white spruce stands. The commercial thinning operation was completed using a Timberjack 1270 harvester and a Timberjack 1210B forwarder. The Forest Engineering Research Institute of Canada (FERIC) monitored the harvesting phase, determined the operational cost and productivity of the harvester and forwarder, determined the residual tree damage, and evaluated the effectiveness of a brushing crew in increasing the productivity of the harvester in areas with high densities of non-merchantable trees.
Commercial thinning
White spruce
Growth
Yield
Regeneration
Tree damage
Costs
Productivity
Alberta
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Commercial thinning of mature lodgepole pine to reduce susceptibility to mountain pine beetle

https://library.fpinnovations.ca/en/permalink/fpipub39961
Author
Mitchell, Janet L.
Date
October 1994
Material Type
Research report
Field
Fibre Supply
Author
Mitchell, Janet L.
Date
October 1994
Material Type
Research report
Physical Description
24 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
British Columbia
Lodgepole pine
Thinning
Insects
Series Number
FO Special Report ; SR 94
Language
English
Abstract
FRDA Report number 224
Commercial thinning
Harvesting systems
Forest machines
FOREST OPERATIONS
COMPENDIUMS
Western Canada
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109 records – page 1 of 11.