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2006-07 Lumber properties program

https://library.fpinnovations.ca/fr/permalink/fpipub1335
Auteur
Lum, Conroy
Date
March 2007
Édition
37816
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
Auteur
Lum, Conroy
Collaborateur
Canadian Forest Service
National Lumber Grades Authority
Date
March 2007
Édition
37816
Genre du document
Research report
Description physique
68 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Mechanical properties
Specifications
Grading
Specification
Série
5439
W-2383
Localisation
Vancouver, British Columbia
Langue
English
Résumé
The Canadian lumber industry has identified, as a high priority, the establishment of a multi-year Lumber Properties Program that pulls together a number of urgent initiatives currently underway to establish and/or maintain Canadian lumber design values. The desire is to have an overall program that emphasizes the proper development of a longer-term strategic plan and process to deal with current and future initiatives. Combining the current industry resources with Federal Government contributions through Natural Resources Canada (NRCan), the first step in the Program has been completed: to gather the various initiatives now underway and to begin the formal development of pan-Canadian policies to guide the development, implementation and on-going maintenance of such initiatives. The key activities in 2006-07 were:
Launching of the pilot phase of the on-going monitoring program, and development of a simulation model to assist in determining what sort of trends can be reliably detected and which cannot;
Completion of the in-grade testing program on Canadian Norway spruce;
Analysis of the No.2 2x4 Hem-Fir (N) monitoring study and confirmation of the appropriateness of assigned design values;
Identification of an alternative species grouping procedure for further study;
Starting of a process under the ASTM Committee on Wood to address gaps in the Grade Quality Index provisions in ASTM Practice D1990, and
Establishing a forum for engaging the US in discussions on lumber properties issues. Lumber properties issues crucial to maintaining the competitiveness of Canadian lumber continue to be the same as in previous years: tests and means to adjust for sample representativeness using the Grade Quality Index (GQI), species grouping and re-grouping procedures, and on-going lumber monitoring. As a result, discussion on a pan-Canadian strategy and supporting policies necessary to support Canadian lumber initiatives tend to focus on these three issues. The challenge is to ensure that these issues are dealt with in a way that balances both short and longer-term needs and provides a net overall benefit to the Canadian industry.
Grading - Lumber - Specifications
Lumber Strength
Documents
Moins de détails

An Integrated torsion-bending vibration test method for monitoring waferboard strength properties

https://library.fpinnovations.ca/fr/permalink/fpipub38404
Auteur
Lau, P.W.C.
Tardif, Y.G.
Date
March 1990
Genre du document
Research report
Domaine
Sustainable Construction
information on the mechanical properties of these panels. Recently, this need was made more acute because
Auteur
Lau, P.W.C.
Tardif, Y.G.
Date
March 1990
Genre du document
Research report
Description physique
24 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Waferboard testing
Waferboards
Test methods
Mechanical properties
Série
CFS project no.12
4310M031
E-1211
Localisation
Ottawa, Ontario
Langue
English
Résumé
Waferboard - Test Method
Waferboard - Strength Properties
Documents
Moins de détails

Apparatus for duration of load compression tests of dimension lumber

https://library.fpinnovations.ca/fr/permalink/fpipub5460
Auteur
Samson, M.
Olson, S.L.
Date
March 1985
Édition
37007
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
Auteur
Samson, M.
Olson, S.L.
Date
March 1985
Édition
37007
Genre du document
Research report
Description physique
10 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Strength load bearing
Compression
Mechanical properties
Picea
Loads
Série
CFS Contract 02-50-65-593
W-211
Localisation
Vancouver, British Columbia
Langue
English
Résumé
Picea glauca - Strength
Strength - Compression - Parallel to grain
Strength - Load bearing - Influence of duration
Documents
Moins de détails

Assessment of heat-treated jack pine and balsam fir

https://library.fpinnovations.ca/fr/permalink/fpipub5324
Auteur
Lihra, T.
Date
May 2003
Édition
42198
Genre du document
Research report
Domaine
Sustainable Construction
durability should be observed. However, some mechanical properties of the wood may have decreased
Auteur
Lihra, T.
Collaborateur
Canada. Canadian Forest Service
Date
May 2003
Édition
42198
Genre du document
Research report
Description physique
17 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Treatment
Mechanical properties
Heat
Série
CFS Value-Added Report 3675
Localisation
Sainte-Foy, Québec
Langue
English
Résumé
Industrial heat treatment technology for wood has been under development since the 1970s. The technology consists in heating wood to temperatures of from 150°C to 240°C while preventing it from burning. This is achieved by heating the wood in either an inert atmosphere or saturated vapour environment. Heating the wood over 200°C changes the chemical structure of the wood and results in a reduction in its hydrophilic behaviour. After heat treatment when wood colour has changed to brown, an improvement in dimensional stability and biological durability should be observed. However, some mechanical properties of the wood may have decreased. This enhanced dimensional stability and biological durability make heat treatment an interesting option for the protection of wood used in exterior applications. The objectives of this study are to assess the performance of heat treatment technologies and to determine the properties of jack pine and balsam fir after heat treatment, as regards to exterior applications. Owing to difficulties in the start-up period that significantly delayed the project, no experimental work had been conducted by the end of March 2003. The lumber has however been sent to two companies for treatment and the physical and mechanical tests will be conducted under a new project entitled “Quality Control and Certification of Thermally Modified Wood.” A final report will be issued at the end of March 2004.
Heat treatment, Effect on mechanical properties
Documents
Moins de détails

Basic wood properties of second-growth sitka spruce

https://library.fpinnovations.ca/fr/permalink/fpipub5534
Auteur
Jozsa, Les A.
von Schilling, B.
Sen, P.
Date
January 1993
Édition
37459
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Jozsa, Les A.
von Schilling, B.
Sen, P.
Collaborateur
British Columbia. Ministry of Forests. Queen Charlotte Forest District.
Date
January 1993
Édition
37459
Genre du document
Research report
Description physique
38 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Second growth
Picea
Physical properties
Mechanical properties
Growth
Série
W-1446
Localisation
Vancouver, British Columbia
Langue
English
Résumé
The basic wood properties of 45-year-old second-growth sitka spruce were examined to determine if rapid growth produces poor wood quality. Five dominant and codominant trees were sampled from each of four stands with stocking densities of 520, 640, 1080, and 1520 stems/ha. Stem size, extent of live crown, yearly wood relative density trends, and longitudinal shrinkage were measured.
Picea sitchensis - Mechanical properties
Picea sitchensis - Physical properties
Second growth
Documents
Moins de détails

Bearing strength of hem-fir

https://library.fpinnovations.ca/fr/permalink/fpipub1006
Auteur
Lum, Conroy
Date
March 1995
Édition
37383
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Lum, Conroy
Collaborateur
Canada. Canadian Forest Service.
Date
March 1995
Édition
37383
Genre du document
Research report
Description physique
2 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Strength load bearing
Mechanical properties
Loads
Série
W-1216
Localisation
Vancouver, British Columbia
Langue
English
Résumé
Higher bearing strength values for Hem-Fir, where justified, will allow designers to realise the full strength potential of the lumber. Machine stress rated (MSR) lumber would benefit the most from an increase in the Hem-Fir bearing strength. Although there are few Hem-Fir MSR lumber producers, it is anticipated that given the recent or planned increase in installed kiln capacity on the west coast, more mills will be considering producing MSR lumber. Acceptance of Hem-Fir MSR lumber in the marketplace will depend on the design values assigned to Hem-Fir MSR lumber. The objective of this project is to establish characteristic bearing strength values for the Hem-Fir species group in CSA O86.1 and progress to date is described.
Strength - Load bearing
Hem-fir - Strength
Documents
Moins de détails

Behavior of composite lumber under long-term loading

https://library.fpinnovations.ca/fr/permalink/fpipub1764
Auteur
Alexopoulos, J.
Shields, J.A.
Date
March 1982
Édition
38281
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
Auteur
Alexopoulos, J.
Shields, J.A.
Date
March 1982
Édition
38281
Genre du document
Research report
Description physique
24 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Testing
Composites
Structural composites
Mechanical properties
Série
3-55-43-306
E-943
Localisation
Ottawa, Ontario
Langue
English
Résumé
Composite Structural Members - Testing
Structural Composites - Strength
Documents
Moins de détails

Behaviour of waferboard floor sheating under concentrated and impact loads

https://library.fpinnovations.ca/fr/permalink/fpipub2338
Auteur
Szabo, T.
Date
June 1981
Édition
38900
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Szabo, T.
Date
June 1981
Édition
38900
Genre du document
Research report
Description physique
15 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Mechanical properties
Série
CFS/DSS project no 10/80-81
DSS o5ss KL 229-0-4143
Localisation
Ottawa, Ontario
Langue
English
Résumé
Floors - Strength - Impact
Documents
Moins de détails

Bending modulus of elasticity and strength of 1.75" x 3.5" x 96" Douglas-fir microlam and spruce specimens

https://library.fpinnovations.ca/fr/permalink/fpipub5495
Auteur
Palka, L.C.
Rovner, B.
Olson, L.
Wakeman, R.G.
Walser, D.C.
Date
March 1991
Édition
37257
Genre du document
Research report
Domaine
Wood Manufacturing & Digitalization
Auteur
Palka, L.C.
Rovner, B.
Olson, L.
Wakeman, R.G.
Walser, D.C.
Date
March 1991
Édition
37257
Genre du document
Research report
Description physique
12 p.
Secteur
Wood Products
Domaine
Wood Manufacturing & Digitalization
Champ de recherche
Advanced Wood Manufacturing
Sujet
Veneer
Mechanical properties
Laminate product
Série
Appendix 2 to Forestry Canada No. 35
Contract no. 1812L007
W-874
Localisation
Vancouver, British Columbia
Langue
English
Résumé
The purpose of this small study was to examine the effect of various test methods upon the bending moduli of elasticity and to determine the bending strength of selected Douglas-fir and spruce laminated veneer lumber specimens.
Lumber, Laminated veneer - Strength
Documents
Moins de détails

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/fr/permalink/fpipub5843
Auteur
Bennett, Douglas M.
Modesto, R.
Ewart, Jim
Jokai, Rob
Parker, Seamus
Clark, Marv
Date
January 2005
Édition
40689
Genre du document
Research report
Domaine
Fibre Supply
Auteur
Bennett, Douglas M.
Modesto, R.
Ewart, Jim
Jokai, Rob
Parker, Seamus
Clark, Marv
Date
January 2005
Édition
40689
Genre du document
Research report
Description physique
19 p
Secteur
Forest Operations
Domaine
Fibre Supply
Champ de recherche
Transportation Infrastructure
Sujet
Test methods
Mechanical properties
Second growth
Ruptures
Procedures
Logs
Sample
Growth
Design
British Columbia
Bending
Advantage
Série
Advantage ; Vol. 5, No. 42
Langue
English
Résumé
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
Documents
Moins de détails

222 notices – page 1 of 23.