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28 records – page 1 of 3.

Density evaluation of interior Douglas-fir parent trees

https://library.fpinnovations.ca/en/permalink/fpipub37141
Author
Gonzalez, J.S.
Date
March 1986
Material Type
Research report
Field
Sustainable Construction
Author
Gonzalez, J.S.
Date
March 1986
Material Type
Research report
Physical Description
1 v.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Pseudotsuga menziesii
Pseudotsuga
Series Number
CFS No. 23;04-55-12-156
W-389
Location
Vancouver, British Columbia
Language
English
Abstract
Pseudotsuga menziesii - Density
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Density profile in young Douglas-fir

https://library.fpinnovations.ca/en/permalink/fpipub36953
Author
Gonzalez, J.S.
Loo-Dinkins, J.
Date
March 1989
Material Type
Research report
Field
Sustainable Construction
Author
Gonzalez, J.S.
Loo-Dinkins, J.
Date
March 1989
Material Type
Research report
Physical Description
15 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Quality control
Qualitative analysis
Pseudotsuga menziesii
Pseudotsuga
Growth
Series Number
CFS No. 35
contract no.5512X403
W-663
Location
Vancouver, British Columbia
Language
English
Abstract
Summary included
Pseudotsuga menziesii - Density
Growth - Influence on quality
Pseudotsuga menziesii - Improvement of stock
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Effect of extractives on the specific gravity of interior Douglas fir and lodgepole pine increment cores

https://library.fpinnovations.ca/en/permalink/fpipub36993
Author
Gonzalez, J.S.
Date
March 1985
Material Type
Research report
Field
Sustainable Construction
-fir (Pseudotsuga menziesii var glauca (Beissn.) Franco) candidate trees in a selection program
Author
Gonzalez, J.S.
Date
March 1985
Material Type
Research report
Physical Description
11 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Specifications
Pseudotsuga menziesii
Pseudotsuga
Pinus contorta
Pinus
Series Number
CFS Contract 02-80-12-156
W-183
Location
Vancouver, British Columbia
Language
English
Abstract
Pseudotsuga menziesii - Specific gravity
Pinus contorta Dougl. var. latifolia
Pseudotsuga menziesii - Extractives
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Effect of thinning and fertilization on wood quality

https://library.fpinnovations.ca/en/permalink/fpipub5457
Author
Jozsa, Les A.
Bramhall, Paul Arthur
Cook, Jean A.
Johnson, S.G.
Date
March 1985
Edition
36999
Material Type
Research report
Field
Sustainable Construction
e r t i l i z a t i o n of trees i n a 37 year-old coastal Douglas-fir (Pseudotsuga menziesii (Mirb
Author
Jozsa, Les A.
Bramhall, Paul Arthur
Cook, Jean A.
Johnson, S.G.
Date
March 1985
Edition
36999
Material Type
Research report
Physical Description
1 v.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Treatment
Silviculture
Pseudotsuga menziesii
Pseudotsuga
Growth
Series Number
CFS Contract 02-80-10-016
W-189
Location
Vancouver, British Columbia
Language
English
Abstract
Growth - Influence of silvicultural treatment
Growth - Influence of fertilizers
Pseudotsuga menziesii - Growth
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Effect of veneer incising on strength properties of Douglas-fir LVL/plywood products

https://library.fpinnovations.ca/en/permalink/fpipub5559
Author
Wang, Brad J.
Chan, K.L.
Date
May 2001
Edition
37576
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Wang, Brad J.
Chan, K.L.
Date
May 2001
Edition
37576
Material Type
Research report
Physical Description
13 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer
Mechanical properties
Pseudotsuga menziesii
Pseudotsuga
Plywood manufacture
Plywood
Laminate product
Series Number
W-1764
Location
Vancouver, British Columbia
Language
English
Abstract
Veneer incising at the peeling lathe, a new technology developed at Forintek, has been increasingly applied in Canadian softwood plywood mills. Significant benefits include reducing veneer curl-up and spin-outs and increasing veneer recovery. However, a comprehensive study of the effect of veneer incising on the conventional hot-pressing process has not been undertaken so far. As part of the work on optimization of LVL/plywood hot pressing process, this report investigated the effect of veneer incising on the strength properties of Douglas-fir LVL/Plywood products. Lightly-incised Douglas-fir veneer peeled with a Forintek mini-lathe was used in comparison to non-incised Douglas-fir veneer. The three veneer moisture levels considered were 0%, 3% and 6%. The number of plies for plywood and LVL panels were 5 and 13, respectively. A mixed-level experimental design was employed. Using a statistical software program, JMP, the importance of factors affecting Douglas-fir LVL/plywood hot-pressing and strength properties were identified. Also the t-test was used to test the significance of the difference in panel mean strength. The results showed that: 1. For Douglas-fir species, the lightly-incised veneer (similar to that now used at mills) does not significantly affect the conventional hot pressing times for 1) 5-ply plywood panels if the target core temperature is 115 0C and 2) 13-ply LVL if the target core temperature is 105 0C, compared to non-incised veneer. The hot-pressing time increases with increase in veneer moisture content ranging from 0 to 6% for 5-ply plywood. 2. For Douglas-fir veneer, no occurrences of blows were observed after unloading the press even with 5-ply plywood panels at 6% veneer moisture content. Under the same conditions, the compression ratios of 5-ply plywood and 13-ply LVL using the lightly-incised veneer are slightly larger compared to non-incised veneer. Also higher moisture veneer results in higher panel compression ratio. 3. For 5-ply Douglas-fir plywood, there are no significant differences in plywood bending MOE and shear strength (lap-shear) between non-incised and lightly-incised veneer at either 0% or 3% veneer moisture content. However, at 6% veneer moisture content, the differences in mean plywood bending MOE and shear strength between non-incised veneer and lightly-incised veneer were identified significant; the mean bending MOE of 5-ply plywood using the lightly-incised veneer is about 10% higher compared to the non-incised veneer; on the contrary, the shear strength (lap-shear) of 5-ply plywood using the lightly-incised veneer is about 20% lower compared to the non-incised veneer. On a statistical basis, there is no significant difference in plywood mean bending MOR between non-incised veneer and lightly-incised veneer at each of the three moisture content levels. 4. For 13-ply Douglas-fir LVL, there is no statistical difference in edgewise bending MOE and MOR between the incised veneer and non-incised veneer at 3% veneer moisture content. Based on the limited number of replicates, the block shear strength through-the-thickness using the lightly-incised veneer is found to be approximately 10% higher compared to the non-incised veneer and this difference is found to be significant on a statistical basis. But the difference in block shear strengths parallel to grain between the incised veneer and non-incised veneer is not significantly different.
Veneers - Incising
Plywood - Manufacture
Lumber, Laminated veneer - Manufacture
Pseudotsuga menziesii - Strength
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Effects of live-branch pruning on the relative density of young Douglas-fir

https://library.fpinnovations.ca/en/permalink/fpipub5447
Author
Jozsa, Les A.
Sawadsky, A.C.
Date
March 1989
Edition
36947
Material Type
Research report
Field
Sustainable Construction
Author
Jozsa, Les A.
Sawadsky, A.C.
Date
March 1989
Edition
36947
Material Type
Research report
Physical Description
35 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Treatment
Silviculture
Pseudotsuga menziesii
Pseudotsuga
Growth
Series Number
CFS No. 34
contract no.5512W402
W-657
Location
Vancouver, British Columbia
Language
English
Abstract
Summary included
Pruning
Growth - Influence of silvicultural treatment
Pseudotsuga menziesii - Density
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Engineering characteristics of Canadian trees: Douglas fir and western hemlock in Interior British Columbia

https://library.fpinnovations.ca/en/permalink/fpipub43440
Author
Adamovich, L.L.
Date
1979
Material Type
Research report
Field
Fibre Supply
Author
Adamovich, L.L.
Date
1979
Material Type
Research report
Physical Description
51 p
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Pseudotsuga menziesii
Tsuga Heterophylla
British Columbia
Strength
Series Number
Technical Notes
Language
English
Abstract
TREES
Engineering characteristics
WOOD
PHYSICAL PROPERTIES
SOFTWOODS
Douglas fir
Western hemlock
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Estimating Douglas-fir wood production from soil and climate data

https://library.fpinnovations.ca/en/permalink/fpipub37215
Author
Oguss Robertson, E.
Jozsa, Les A.
Richards, J.E.
Date
April 1988
Material Type
Research report
Field
Sustainable Construction
Author
Oguss Robertson, E.
Jozsa, Les A.
Richards, J.E.
Date
April 1988
Material Type
Research report
Physical Description
40 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Soil
Rings
Pseudotsuga menziesii
Pseudotsuga
Growth
Series Number
CFS No. 33;55-12X-003
W-546
Location
Vancouver, British Columbia
Language
English
Abstract
Growth rings
Pseudotsuga menziesii
Soil characteristics
Climate conditions
Dendrochronology
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Estimating tree growth from climate data for Douglas-fir on Vancouver Island

https://library.fpinnovations.ca/en/permalink/fpipub37189
Author
Oguss Robertson, E.
Jozsa, Les A.
Date
March 1987
Material Type
Research report
Field
Sustainable Construction
of vigorous-growth, young Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees. The purpose
Author
Oguss Robertson, E.
Jozsa, Les A.
Date
March 1987
Material Type
Research report
Physical Description
17 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
British Columbia
Rings
Pseudotsuga menziesii
Pseudotsuga
Growth
Series Number
CFS No. 32;04-55-12-003
W-467
Location
Vancouver, British Columbia
Language
English
Abstract
Pseudotsuga menziesii - Growth
Annual rings
Growth - Influence of climate
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Evaluating Douglas-fir tree quality in the British Columbia interior

https://library.fpinnovations.ca/en/permalink/fpipub5451
Author
Middleton, G.R.
Munro, B.D.
Wright, D.M.
Date
June 1985
Edition
36977
Material Type
Research report
Field
Sustainable Construction
(CFS), began an assessment of the q u a l i t y of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco
Author
Middleton, G.R.
Munro, B.D.
Wright, D.M.
Date
June 1985
Edition
36977
Material Type
Research report
Physical Description
30 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Value added
Stands
Pseudotsuga menziesii
Pseudotsuga
British Columbia
Series Number
Special Publication ; SP-19
W-97
Location
Vancouver, British Columbia
Language
English
Abstract
The study objective was to determine if differences in the quality of Douglas-fir in the B.C. Interior could be assessed on the basis of characteristics visible in standing trees so as to provide site-specific measures of stand value. Six sawmill studies, with a final sample of 1,862 trees are described. Sample trees were selected and their quality characteristics recorded. These trees were felled and their logs processed into finished lumber from which individual tree values were calculated. An index shows the effect of tree quality and tree size on average lumber value per unit volume. A description of each mill study allows comparison of average sound lumber recovery factors.
Stand value
Pseudotsuga menziesii - British Columbia
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28 records – page 1 of 3.