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Development of pressing strategies for veneer panel products

https://library.fpinnovations.ca/en/permalink/fpipub37386
Author
Andersen, Axel W.
Troughton, G.E.
Date
March 1995
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Andersen, Axel W.
Troughton, G.E.
Contributor
Canada. Canadian Forest Service.
Date
March 1995
Material Type
Research report
Physical Description
19 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer manufacturing
Veneer
Pressing
Plywood manufacture
Plywood
Panels
Laminate product
Series Number
Canadian Forest Service No. 21
Contract no. 1812L010
W-1223
Location
Vancouver, British Columbia
Language
English
Abstract
A series of plywood and laminated veneer lumber (LVL) panels were prepared using incised veneers in the second phase of this two year project. The primary purpose of the work was to evaluate the effects of steam injection on the pressing times. A secondary objective was to expand the study of warpage in three-ply and four-ply plywood which was begun in phase one. Thirteen-ply 40 mm (1 5/8 inch) thick panels were evaluated for press times and thin 9.5 mm (3/8 inch) and 12.5 mm (1/2 inch) panels were evaluated for cupping and bowing. Press temperatures of 150 degrees C, 175 degrees C and 204 degrees C were used with a commercial adhesive mix for the LVL study while normal plywood pressing conditions were used for the plywood. For the plywood warpage study, the effect of lathe check orientation and species mix were evaluated. The lathe check orientation had little effect while the surface veneer species had a pronounced effect on the warpage in the plywood. Steam used for injection was heated to 260 degrees C at 450 KPa (65 psi) with a super-heater. All panels were made with incised 3.2 mm (1/8 inch) SPF veneers. The project demonstrated that steam injection can shorten press times by fifty percent if incised veneers are used.
Lumber, Laminated veneer - Pressing
Lumber, Laminated veneer - Manufacture
Veneers - Pressing
Veneers - Manufacture
Plywood - Panels - Pressing
Plywood - Manufacture
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Lateral resistance and deflection of plywood diaphragms : considerations for a simplified code design method - progress report

https://library.fpinnovations.ca/en/permalink/fpipub37372
Author
Palka, L.C.
Date
March 1995
Material Type
Research report
Field
Sustainable Construction
Author
Palka, L.C.
Contributor
Canada. Canadian Forest Service.
Date
March 1995
Material Type
Research report
Physical Description
37 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Plywood
Panels tests
Panels
Joints
Building construction
Analysis
Series Number
Canadian Forest Service No. 17
Contract no. 1510R844
W-1186
Location
Vancouver, British Columbia
Language
English
Abstract
At the request of the Council of Forest Industries, a simplified (hand-calculation) design method has been proposed for estimating the ultimate shear capacity and load-deflection response of wood-framed and panel-sheathed diaphragms, by Forintek's Wood Engineering Department. In its current form, the simplified code design approach can predict ultimate shear capacity for a wide range of (blocked) diaphragm constructions, sheathed with panels ranging from 7.5 mm (3/8") to 18.5 mm (3/4") in thickness, with a 22% coefficient of variation. This is comparable to the 21% variability exhibited by the current Canadian diaphragm design method, and not alarmingly larger than the 16% shown by the more detailed APA design method. Indeed, for the three high-shear diaphragms sheathed by 18.5 mm (3/8") Douglas-fir plywood panels, the proposed simplified design method yielded shear prediction errors of only 0%, 1% and 6%. Furthermore, simplified functions were also able to provide good estimates of diaphragms failure mechanisms, and their load-deflection patterns, as measured in earlier verification tests. Predictions from the simplified model need to be experimentally verified for high shear capacity diaphragms sheathed in thick panels fastened to glulam frames by large diameter nails; before its possible introduction to the Canadian wood design code.
Diaphragm analysis
Panels - Tests
Plywood - Panels
Plywood for building construction
Joints and fastenings - Nailed
Documents
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A literature review of alternate species in oriented strand board and waferboard

https://library.fpinnovations.ca/en/permalink/fpipub41726
Author
Grant, D.R.
Date
January 1995
Material Type
Research report
Field
Wood Manufacturing & Digitalization
on properties o f oriented strand panels. For. Prod. J. 31(9):43-52; 1981. 40. Furuno, T.; Hse, C-Y.; Côté, W.A
Author
Grant, D.R.
Date
January 1995
Material Type
Research report
Physical Description
245 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood
Flakeboards
Waferboards
Strandboards
Research
Particle boards
Panels
OSB
Oriented strandboard
Orientation
Bibliographies
Location
Sainte-Foy, Québec
Language
English
Abstract
Wood Based Panels - Research - Bibliography
Alternate Species
Particleboard
Flakeboard
Waferboard
Oriented strandboard
OSB
Documents
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Panel products stewardship

https://library.fpinnovations.ca/en/permalink/fpipub38815
Author
Barry, A.
Date
October 1995
Material Type
Research report
Field
Wood Manufacturing & Digitalization
. The feasibility of recycling OSB trimmings and waste into particleboard panels was tested by using it to replace
Author
Barry, A.
Date
October 1995
Material Type
Research report
Physical Description
26 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Panels
Series Number
3843M015
E-2823
Location
Ottawa, Ontario
Language
English
Abstract
Panel Products
Stewardship
Documents
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