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

https://library.fpinnovations.ca/fr/permalink/fpipub41365
Auteur
Pirvu, Ciprian
Date
March 2007
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Pirvu, Ciprian
Date
March 2007
Genre du document
Research report
Description physique
66 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Veneer
Mechanical properties
Specifications
Laminate product
Joints
Gluing
Specification
Série
Value to Wood No. FCC 58
W-2384
Localisation
Vancouver, British Columbia
Langue
English
Résumé
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
Documents
Moins de détails

State-of-the-art report on fibre reinforced polymer (FRP) utilization in wood products

https://library.fpinnovations.ca/fr/permalink/fpipub41302
Auteur
Pirvu, Ciprian
Date
June 2004
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Pirvu, Ciprian
Date
June 2004
Genre du document
Research report
Description physique
35 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Materials
Série
W-2073
Localisation
Vancouver, British Columbia
Langue
English
Résumé
Fibre-reinforced wood systems are light, strong, stiff composites that can efficiently replace larger wood members and can be relied on to provide consistent mechanical properties. This report is an introduction to fibre-reinforced wood systems for members of the Canadian wood products industry. It provides the motivation for reinforcing wood with synthetic fibres, and surveys the choice of materials and their uses. Numerous examples of current applications are discussed to demonstrate the strong and weak points of various approaches and examine the durability and management of fibre-reinforced wood products, as well as to indicate opportunities that exist for the Canadian wood products industry. This report is intended to be a useful reference for the Canadian wood products industry, and assist future developments in structural and non-structural applications of fibre-reinforced wood products.
Composite materials - Durability
Fibres
Board products - Materials used
Documents
Moins de détails

Structural performance of wood diaphragms with thick panels

https://library.fpinnovations.ca/fr/permalink/fpipub37821
Auteur
Pirvu, Ciprian
Date
March 2007
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Pirvu, Ciprian
Collaborateur
Canada. Canadian Forest Service.
Date
March 2007
Genre du document
Research report
Description physique
10 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Structural analysis
Design
Building construction
Analysis
Série
Canadian Forest Service No. 13;4636
W-2396
Localisation
Vancouver, British Columbia
Langue
English
Résumé
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
Moins de détails