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Bending strength and stiffness of log stringers for bridges on forest roads: tests of second-growth Douglas-fir and western hemlock logs

https://library.fpinnovations.ca/en/permalink/fpipub5843
Author
Bennett, Douglas M.
Modesto, R.
Ewart, Jim
Jokai, Rob
Parker, Seamus
Clark, Marv
Date
January 2005
Edition
40689
Material Type
Research report
Field
Fibre Supply
Author
Bennett, Douglas M.
Modesto, R.
Ewart, Jim
Jokai, Rob
Parker, Seamus
Clark, Marv
Date
January 2005
Edition
40689
Material Type
Research report
Physical Description
19 p
Sector
Forest Operations
Field
Fibre Supply
Research Area
Transportation Infrastructure
Subject
Test methods
Mechanical properties
Second growth
Ruptures
Procedures
Logs
Sample
Growth
Design
British Columbia
Bending
Advantage
Series Number
Advantage ; Vol. 5, No. 42
Language
English
Abstract
In order to provide bridge designers with better information, International Forest Products Limited (Interfor) asked the Forest Engineering Resarach Institute of Canada (FERIC) to evaluate the bending strength and stiffness of log stringers used for constructing bridges on forest roads in coastal British Columbia. Given the lack of definitive standards for testing this material, FERIC developed a field-based test procedure and designed a test facility for destructive testing of full-size, whole-log stringers obtained from second-growth stands. Sixteen coastal Douglas-fir and twelve western hemlock logs were tested in 2003. This report describes the test procedure and methods of analysis, presents the log bending strength and stiffness results, and makes recommendations regarding future testing.
Bridge design
Log stringers
Bending strength
Modulus of rupture
Modulus of elasticity
Test procedure
Second-growth logs
Douglas fir
Western hemlock
Coastal British Columbia
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Chain chokers for small scale operations

https://library.fpinnovations.ca/en/permalink/fpipub377
Author
Ewing, Roderick H.
Date
January 1996
Edition
36611
Material Type
Research report
Field
Fibre Supply
Author
Ewing, Roderick H.
Date
January 1996
Edition
36611
Material Type
Research report
Physical Description
11 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Winches
Wear
Treatment
Tensile strength
Tensile
Mechanical properties
Steel
Small scale
Skidding
Shock
Quenching
Operations
Loads
Heat
Alloy
Series Number
Technical Note ; TN-000237
Language
English
Abstract
With the appropriate mainline attachment, chain chokers are a viable alternative to conventional wire rope chokers, particularly for small-scale operations. This report provides users of tractor-mounted winches and cable skidders with technical information on chain chokers. The report covers type of steels, chain specifications and grades, and how to inspect chains for wear elongation. The various components (e.g. sliding hooks, rings) used to assemble chain chokers are also discussed.
CHAIN CHOKERS
Steel
ALLOYS
WORKING LOAD
BREAKING STRENGTH
TENSILE STRENGTH
Wear
STATIC LOAD
SHOCK LOAD
Heat treatment
QUENCHING
TEMPERING
Winching
Skidding
Small-scale operations
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Evaluation of log load wrappers made from larger diameter and jacketed synthetic ropes

https://library.fpinnovations.ca/en/permalink/fpipub53031
Author
Jokai, Rob
Date
September 2020
Material Type
Research report
Field
Fibre Supply
Author
Jokai, Rob
Date
September 2020
Material Type
Research report
Physical Description
12 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Transportation Infrastructure
Subject
Transport
Logs
Mechanical properties
Polyethylene
Ropes
Safety
FPI TR
FOP Technical Report
Series Number
Technical Report ; TR 2020 n.28
Language
English
Abstract
This study tested ultra-high molecular weight polyethylene (UHMWPE) ropes for log load securement. Destructive testing of used rope samples done in a previous project found that the strength of these ropes decreased with use. To address this problem, the diameter of the synthetic rope was increased. In addition, a different type of rope with a UHMWPE inner core covered with a polyester protective jacket was tested. The outer jacket protected the inner core from dirt and abrasion which may help mitigate the loss in strength that occurs with use. Wrappers were put into service and tested for breakage after three and six months of use.
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Evaluation of skidder-mounted piling rakes for the site preparation

https://library.fpinnovations.ca/en/permalink/fpipub44026
Author
Cormier, Denis
Ryans, Mark
Date
November 1993
Material Type
Research report
Field
Fibre Supply
Author
Cormier, Denis
Ryans, Mark
Date
November 1993
Material Type
Research report
Physical Description
12 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Site preparation
Skidders
Productivity
Machines
Mechanical properties
Language
English
Abstract
Préparation de terrain
Méthode mécanisée
EMPILAGE
Mise en andains
Véhicules moteurs
Débardeurs
ÉVALUATION DE MACHINE
Productivité
Râteau Eden SKR 10800
Râteau force Sitemaster
Râteau Raumfix
Râteau artisanaux
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Preventing soil compaction and rutting in the boreal forest of Western Canada: a practical guide to operating timber-harvesting equipment

https://library.fpinnovations.ca/en/permalink/fpipub40623
Author
Sutherland, Brad
Date
May 2003
Material Type
guide
Research report
Field
Fibre Supply
Author
Sutherland, Brad
Date
May 2003
Material Type
guide
Research report
Physical Description
51 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Mechanical properties
Compaction
Soil
Rutting
Sample
Harvesting
Advantage
Soft soil
Moisture
Harvesting equipment
Series Number
Advantage ; Vol. 4, No. 7
Language
English
Abstract
When forest harvesting equipment moves across a cutblock, soil compaction and/or rutting can result. Forest practitioners are therefore concerned about the long-term effects of harvesting on forest soil health, water quality, and tree growth. The purpose of this handbook is to provide practical advice to forestry contractors and equipment operators, and their field supervisors, about the risk of damage to forest soils during harvesting operations, and how to avoid it. The opportunity to protect forest soil occurs at each step of the forestmanagement process, from harvest planning to field layout to harvesting and post-harvesting activities. Operators of forestry equipment, harvesting contractors, and field supervisors are vital links in this process. To help identify when the health of forest soil is at risk, this handbook offers a brief introduction about forest soils, and explains why and how soil is susceptible to damage. The soil terminology used is defined in a glossary along with other equipment related terms (Appendix I). For harvesting contractors and equipment operators, the handbook explains how visual indicators like landscape features and tree species can be used to estimate soil moisture, and offers simple field tests to help them anticipate when soils become at risk. For contractors, equipment features that influence soil compaction and rutting are discussed, and operating techniques to reduce soil damage are suggested. For field supervisors, harvest scheduling options that minimize soil damage are included. As well, the handbook offers ways to modify harvesting operations when soils have become susceptible to damage. Maintaining soil health during harvesting requires knowing when soils are at increased risk of compaction and rutting, and understanding how equipment operation interacts with the soil. If contractors, operators, and field supervisors can anticipate susceptible soil types and conditions, they will be able to plan ahead and make changes to their operating schedules and techniques. Recommendations made in this handbook regarding equipment and operating techniques are to serve as guidelines only. Local operating conditions and regulations, as well as equipment availability, must be considered when interpreting this information.
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Preventing soil damage in the boreal and Acadian forests of Eastern Canada - A practical guide for forest operations

https://library.fpinnovations.ca/en/permalink/fpipub40724
Author
Sutherland, Brad
Date
October 2005
Material Type
guide
Research report
Field
Fibre Supply
Author
Sutherland, Brad
Date
October 2005
Material Type
guide
Research report
Physical Description
61 p
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Boreal forests
Forests
Harvesting
Harvesting equipment
Systems
Mechanical properties
Soil
Sample
Canada
Advantage
Soft soil
Series Number
Advantage ; Vol. 6, No. 27
Language
English
Abstract
FERIC has produced a guide for equipment operators, contractors and their field supervisors aimed at preventing soil damage from forest operations. A brief description of soils and soil damage categories is provided as are recommendations for choosing equipment options and operating techniques that reduce damaging soil disturbance.
Eastern Canada
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Soil compaction associated with summer harvesting in a mixedwood stand in central Alberta

https://library.fpinnovations.ca/en/permalink/fpipub40618
Author
Sutherland, Brad
Date
March 2003
Material Type
Research report
Field
Fibre Supply
Author
Sutherland, Brad
Date
March 2003
Material Type
Research report
Physical Description
7 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Mechanical properties
Compaction
Soil
Skidding
Harvesting
Bulk density
Alberta
Advantage
Soft soil
Series Number
Advantage ; Vol. 4, No. 2
Language
English
Abstract
The Forest Engineering Research Institute of Canada (FERIC) studied a summer roadside harvesting operation in a hardwood-dominated mixedwood stand in central Alberta. This report describes the in-block soil compaction resulting from the felling and skidding phases.
Alberta
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Évaluation de câbles d'arrimage en fibre synthétique gainé de plus grand diamètre

https://library.fpinnovations.ca/en/permalink/fpipub53032
Author
Jokai, Rob
Date
Septembre 2020
Material Type
Research report
Field
Fibre Supply
Author
Jokai, Rob
Date
Septembre 2020
Material Type
Research report
Physical Description
13 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Transportation Infrastructure
Subject
Transport
Logs
Mechanical properties
Polyethylene
Ropes
Safety
FPI TR
FOP Technical Report
Series Number
Technical Report ; RT 2020 n.28
Language
French
Abstract
Cette étude a évalué des câbles en polyéthylène de poids moléculaire ultra élevé (PEPMUE) pour sécuriser des chargements de billes. Des tests destructifs d'échantillons de câbles usagés effectués dans un projet précédent avaient révélé que la résistance de ces câbles diminuait avec l'utilisation. Pour résoudre ce problème, le diamètre du câble synthétique a été augmenté. De plus, un autre type de câble avec une âme intérieure en PEPMUE recouverte d'une gaine de protection en polyester a été testé. La gaine extérieure protégeait le câble intérieur de la saleté et de l'abrasion, ce qui peut aider à atténuer la perte de résistance qui se produit avec l'utilisation. Les câbles ont été mis en service et testés pour la résistance à la rupture après trois et six mois d'utilisation.
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8 records – page 1 of 1.