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Development of standards for edge-glued and face-glued engineered products

https://library.fpinnovations.ca/en/permalink/fpipub41365
Author
Pirvu, Ciprian
Date
March 2007
Material Type
Research report
Field
Sustainable Construction
Author
Pirvu, Ciprian
Date
March 2007
Material Type
Research report
Physical Description
66 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Veneer
Mechanical properties
Specifications
Laminate product
Joints
Gluing
Specification
Series Number
Value to Wood No. FCC 58
W-2384
Location
Vancouver, British Columbia
Language
English
Abstract
Forintek has completed a two-year investigation of the NLGA SPS 6 Standard, Special Products Standard for Structural Face-Glued Lumber. The NLGA SPS 6 Standard prescribes product specifications and qualification and quality control requirements for structural products created by edge-gluing and/or fingerjoining lumber segments. Under the NLGA SPS 6 Standard, the design values assigned are based on the visual grade and the stress level achieved in qualification tests on the glue joints. The project assessed the effect of the following three factors on strength of the NLGA SPS 6 product: 1. Tension proof-loading; 2. Relative location of fingerjoints in adjacent members when fingerjoined material is edge-glued; 3. Strength of the material used to make the NLGA SPS 6 product. Results showed a positive effect of proof-loading, a minor effect of staggering of fingerjoints, and a highly significant effect of density of raw material on tensile stress of edge-glued specimens. It was confirmed that SPS6 products of greater commercial value can be obtained from lower grade lumber. However, visual grading of SPS 6 products proved to be more difficult than visual grading of lumber, because grade-determining wood characteristics were sometimes hidden in the bond line, and could not be properly identified. The findings of this project can be used to fine tune the NLGA SPS 6 standard and the other NLGA fingerjoint and face-glued lumber product standards. The project will help the wood industry maximize the utilization of their raw material resource, resulting in increased profitability.
Structural timbers - Mechanical properties
Gluing - Specifications
Lumber - Gluing
Glued joints - Finger
Glued joints - Edge
Glued joints - Specifications
Lumber, Laminated veneer - Strength
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Structural performance of wood diaphragms with thick panels

https://library.fpinnovations.ca/en/permalink/fpipub37821
Author
Pirvu, Ciprian
Date
March 2007
Material Type
Research report
Field
Sustainable Construction
Author
Pirvu, Ciprian
Contributor
Canada. Canadian Forest Service.
Date
March 2007
Material Type
Research report
Physical Description
10 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Structural analysis
Design
Building construction
Analysis
Series Number
Canadian Forest Service No. 13;4636
W-2396
Location
Vancouver, British Columbia
Language
English
Abstract
The objectives of this project are to provide research information suitable for implementing design procedures for diaphragms with thick sheathing in the Canadian Standard for Engineering Design in Wood (CAN/CSA O86.1) and to make the information available to other markets by publishing the results and recommended procedures in a journal article.
Structural analysis
Diaphragm analysis
Building construction - Design
Documents
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