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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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Development of a high performance OSB panel : revised 1995 addendum

https://library.fpinnovations.ca/en/permalink/fpipub5519
Author
Palka, L.C.
Karacabeyli, Erol
Stroh, L.
Date
May 1996
Edition
37404
Material Type
Research report
Field
Wood Manufacturing & Digitalization
(or batch) effects based on small number of replicates, the uniformity of physical and mechanical
Author
Palka, L.C.
Karacabeyli, Erol
Stroh, L.
Date
May 1996
Edition
37404
Material Type
Research report
Physical Description
37 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Flakeboards
Waferboards
Mechanical properties
Strandboards
Oriented strandboard
Orientation
Series Number
W-1297
Location
Vancouver, British Columbia
Language
English
Abstract
This addendum completes the presentation of the data and research findings for the project entitled "Development of a high performance OSB panel." Most of the short-term test results and preliminary long-term creep data were summarized in a previous report (Project No. 38-43-M-410) which was submitted to the Canadian Forest Service. This addendum to that report includes new data on rolling shear, revised data on shear-through-thickness, and creep data collected during a load duration of nine months, followed by a three-week creep recovery. In addition, the effects of parameters such as strand length and climatic conditions on the engineering properties are discussed for OSB, waferboard, and plywood panels. Utilization of long strands improved the majority of the properties of OSB panels produced with commercial strands. This improvement, however, was not observed for the OSB panels produced with laboratory strands.
Waferboard and Flakeboard - Strength
Oriented strandboard - Strength
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Lumber properties for compression chords of pitched trusses - code implementation

https://library.fpinnovations.ca/en/permalink/fpipub37413
Author
Lum, Conroy
Date
February 1996
Material Type
Research report
Field
Sustainable Construction
Author
Lum, Conroy
Contributor
Canada. Canadian Forest Service.
Date
February 1996
Material Type
Research report
Physical Description
44 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Roofs
Trusses
Testing
Mechanical properties
Design
Series Number
Canadian Forest Service No. 11
Contract no. 1510K026
W-1321
Location
Vancouver, British Columbia
Language
English
Abstract
In response to a need for technical information to support the design of wood trusses in Canada, the Truss Research Program was established. Forintek's role in the Truss Research Program consisted of two projects: Truss Testing and Analysis, and Strength Variations in Trusses. The first project funded by the wood truss industry, focussed on establishing the structural reliability of residential pitched chord trusses and developing experimental data to verify truss analysis tools used by the truss industry. The second project, funded by the CFS, which is the topic of this report, provided the lumber properties information for the program. The combined loading equipment developed under this project has been used to test 2x4 S-P-F 1650f-1.5E MSR lumber under axial compression and bending loads. This data will now be used to verify a comprehensive stochastic finite element model that is currently under development at the University of British Columbia. A lumber design procedure comprised of a new interaction equation and factors to quantify load configuration effects for truss applications was developed under this project and at U.B.C. The design procedure was accepted in principle by the Technical committee on CSA-O86.
Trusses - Testing
Trusses - Design
Trusses - Strength
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Truss research : special project summary report

https://library.fpinnovations.ca/en/permalink/fpipub41148
Contributor
Forintek Canada Corp.
Date
July 1996
Material Type
Research report
Field
Sustainable Construction
Contributor
Forintek Canada Corp.
Date
July 1996
Material Type
Research report
Physical Description
4 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Roofs
Trusses
Mechanical properties
Design
Series Number
W-1353
Location
Ottawa, Ontario
Language
English
Abstract
This report describes how the truss research project facilitates wood design code changes. In addition to addressing the code discrepancies, this effort provided an opportunity for the lumber producers, through Forintek and the Canadian Wood Council, to gain a better understanding of the needs of the truss industry. It also provided an opportunity for the truss industry to gain a better understanding of the structural performance of lumber and the potential benefits of participating in the development of design codes and standards.
Trusses - Design
Trusses - Strength
Trusses - Tests
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Upgrading the bearing strength of hem-fir lumber in the Canadian Wood Design Code

https://library.fpinnovations.ca/en/permalink/fpipub37402
Author
Lum, Conroy
Date
February 1996
Material Type
Research report
Field
Sustainable Construction
Author
Lum, Conroy
Contributor
Canada. Canadian Forest Service.
Date
February 1996
Material Type
Research report
Physical Description
14 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Strength load bearing
Mechanical properties
Loads
Series Number
Canadian Forest Service No. 13
Contract no. 1510A816
W-1295
Location
Vancouver, British Columbia
Language
English
Abstract
The bearing strength of Hem-Fir MSR lumber has increased from 11 to 38% over the previous bearing strength values. The upgraded design values will be published in the upcoming supplement to the Canadian Engineered Wood Design code, CSA-O96.1-M94. This code change was assisted in part by data developed in this project on the bearing strength of Hem-Fir. This code change, although it did not affect the bearing strength of visually grade Hem-Fir lumber, is significant to the utilisation of Hem-Fir MSR lumber in the Canadian market. Grades of MSR Hem-Fir lumber 1650f-1.5E or higher now have the same bearing strength values as S-P-F MSR lumber. This simplifies the design code when MSR lumber is specified and allows the full potential of MSR Hem-Fir lumber to be used in engineered wood applications such as trusses. Additional data are being collected on the performance of Hem-Fir lumber under constant loads. This data will create a data base on Hem-Fir lumber similar to that developed for S-P-F and D.Fir-L in 1993-1994.
Strength - Load bearing
Hem-fir - Strength
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