Passer en-tête et de la navigation

Raffinez votre recherche

1864 notices – page 1 de 94.

FPInnovations pushes wood as solution to climate goals, affordable housing

https://library.fpinnovations.ca/fr/permalink/fpipub8832
Auteur
Hixson, Russell
Date
2022
Genre du document
Article
Domaine
Sustainable Construction
Auteur
Hixson, Russell
Date
2022
Genre du document
Article
Description physique
1 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Building construction
Carbon
Climate
Construction
News
Wood construction
Série
Journal reprint; 2022
Langue
English
Résumé
This article in the Journal of Commerce highlights FPInnovations Sustainable Construction spotlight series. Experts at FPInnovations believe using wood technology could play a major role in helping Canada meet its climate goals. This article may be accessed on the Journal of Commerce's website: https://canada.constructconnect.com/joc/news/resource/2022/06/fp-innovations-pushes-wood-as-solution-to-climate-goals-affordable-housing The full FPInnovations In the Spotlight series can be accessed at: https://web.fpinnovations.ca/in-the-spotlight-sustainable-construction/
Documents
Moins de détails

Canadian Regulations on Formaldehyde Emissions from Composite Wood Products

https://library.fpinnovations.ca/fr/permalink/fpipub8520
Auteur
Schorr, Diane
Gosselin, Mathieu
Date
February 2022
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Schorr, Diane
Gosselin, Mathieu
Date
February 2022
Genre du document
Research report
Description physique
3 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Composites
Emissions
Formaldehyde
Regulations
Wood products
Série
InfoNote 2022 N1 E
Langue
English
Résumé
The Canadian government published a new regulation on the formaldehyde emissions from composite wood products which prohibits the import, sale or offer for sale of composite wood products that emit formaldehyde beyond established limits. The new law will come into force on January 7, 2023.
Documents
Moins de détails

Règlementation canadienne sur les émissions de formaldéhyde des produits de bois composite

https://library.fpinnovations.ca/fr/permalink/fpipub8521
Auteur
Schorr, Diane
Gosselin, Mathieu
Date
Février 2022
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Schorr, Diane
Gosselin, Mathieu
Date
Février 2022
Genre du document
Research report
Description physique
3 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Composites
Emissions
Formaldehyde
Regulations
Wood products
Série
InfoNote 2022 N1 F
Langue
French
Résumé
Le gouvernement du Canada a publié un nouveau règlement sur les émissions de formaldéhyde des produits de bois composite qui interdit l'importation, la vente ou la mise en vente de produits de bois composite qui émettent du formaldéhyde au-delà des limites établies. La nouvelle loi entrera en vigueur le 7 janvier 2023.
Documents
Moins de détails

Technical guide for the design and construction of tall wood buildings in Canada

https://library.fpinnovations.ca/fr/permalink/fpipub8639
Auteur
Karacabeyli, Erol
Lum, Conroy
Date
April 2022
Genre du document
guide
manual
Domaine
Sustainable Construction
Auteur
Karacabeyli, Erol
Lum, Conroy
Collaborateur
Canadian Wood Council (CWC)
Date
April 2022
Genre du document
guide
manual
Description physique
683 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Building construction
Design
Wood frame
Série
Special Publication SP-543E
Langue
English
ISBN
9780864886101
Résumé
The definitive guide for the mass timber design and construction of tall buildings has been updated to align with changes to national codes and standards. It builds on 12-storey mass timber gravity systems as an Acceptable Solution in the 2020 edition of the National Building Code, and targets supporting Alternative Solutions that will enable wood to be used beyond 12 storeys.
To download the book, go to: https://web.fpinnovations.ca/tallwood/
Moins de détails

Calculating structural fire resistance of wood-frame assemblies

https://library.fpinnovations.ca/fr/permalink/fpipub8672
Auteur
Dagenais, Christian
Chorlton, Bronwyn
Chen, Zhiyong
Date
March 2022
Genre du document
InfoNote
Domaine
Sustainable Construction
Auteur
Dagenais, Christian
Chorlton, Bronwyn
Chen, Zhiyong
Date
March 2022
Genre du document
InfoNote
Description physique
5 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Fire protection
Structural design
Standards
Wood construction
Langue
English
Résumé
This InfoNote summarizes the verification and validation that the current design requirements of Annex B of CSA O86 can also be applied to small framing members used in unprotected and protected lightweight wood-frame assemblies, e.g., walls and floors. With minor editorial changes, the scope of application of Annex B of CSA O86 could include all wood and wood-based products listed in CSA O86, regardless of their original and residual dimensions.
Documents
Moins de détails

Expanding wood use towards 2025. Developing design guidelines to prevent failure of self-tapping screw due to wetting, year 2

https://library.fpinnovations.ca/fr/permalink/fpipub8691
Auteur
Khan, Mehsam Tanzim
Ni, Chun
Date
March 2022
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Khan, Mehsam Tanzim
Ni, Chun
Date
March 2022
Genre du document
Research report
Description physique
94 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Fasteners
Performance
Building construction
Building materials
Série
Expanding wood use towards 2025
Langue
English
Résumé
Originally developed in Europe, self-tapping screws (STS) have become the proprietary fastener of choice in recently built mass timber buildings in North America. STS offers some advantages over other types of fasteners, such as (a) installation of STS inside wood members is easier as it does not require pre-drilling of holes inside members, (b) the yield moment, torsional strength and tensile strength of STS is comparatively high as the material forming the screw is usually hardened after rolling the thread, (c) the stiffness of the resulting connection is higher and the chances of slipping are less (Frese and Blass, 2009), and (d) STS with long threaded lengths makes it feasible for use in large structural members, e.g., mass timber products. Recently, issues have been raised on failures of STS due to shrinkage and swelling of wood products resulting from moisture content changes, particularly during construction in the coastal climates. Failures of STS have been reported by structural engineers and contractors of several mass timber projects in NA. This has greatly increased the liability of practitioners involved in mass timber construction. This project will investigate the material properties of several types of mass timber products and self-tapping screws. These material properties will be used in an analytical and numerical prediction model to describe the behaviour of self-tapping screws in mass timber products under moisture content variation.
Documents
Moins de détails

Modelling of R22+ wood-frame walls. Model validation with experimental measurements

https://library.fpinnovations.ca/fr/permalink/fpipub8632
Auteur
Holcroft, Neal
Date
April 2022
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Holcroft, Neal
Date
April 2022
Genre du document
Research report
Description physique
112 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Wood frame
Performance
British Columbia
Climate
Environment
Série
Technical Report TR 2022 N 17
Langue
English
Résumé
The overall objective of this study is to provide information to building design practitioners that will help to improve accuracy of hygrothermal models and enable them to better use these models to predict the durability and thermal performance of wood-based building envelopes. To achieve this, hygrothermal models using WUFI Pro software are validated with experimental data obtained from five wood-frame wall assemblies, with different insulation and vapour control strategies, exposed to the climatic conditions of Vancouver from October 2018 to May 2020. This exercise provides a set of model input parameters that the practitioner can use to assess similar structures exposed to similar environmental conditions. Sensitivity analysis is conducted on the model input parameters to establish which are the most important in obtaining a good fit to experimental measurements, and therefore accurate prediction of assembly performance. There is also discussion on limitations of the hygrothermal model.
Documents
Moins de détails

Detection of phytophthora pathogens in wood products using genomics, part two

https://library.fpinnovations.ca/fr/permalink/fpipub8569
Auteur
Dale, Angela
Kus, Stacey
Date
March 2022
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Dale, Angela
Kus, Stacey
Date
March 2022
Genre du document
Research report
Description physique
13 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Pathogens
Testing
Tolerance
Preservatives
Wood
Wood products
Série
Techncial Reports TR 2022 N 13
Langue
English
Résumé
Pathogen detection and identification have been vastly improved with advances in genomics; however, knowledge gaps remain around efficacy and use in wood commodities, especially in regulatory settings. In part one of this project, we compared detection efficacy of different methods on common export and import forest products. In-situ detection was more sensitive than traditional isolation, with 100% detection rates for some methods. However, there were several false positives in control samples. False positive detection of quarantine pathogens on wood products could be a serious problem in trade. The goal of part two of this project was to determine the cause of the false positives. In addition, we continued to compare detection methods by looking at point of care detection with a portable qPCR system and using RNA assays to test pathogen viability. False positives were likely due to DNA contamination persisting through the various wood processing steps. These results confirm the need for additional confirmation of pathogen presence or viability after a positive DNA test. RNA assays failed to detect pathogen presence in most samples. Further testing is needed to determine optimal RNA extraction conditions to provide meaningful results. Point of care detection using portable tools was comparable to laboratory methods and would provide a useful tool for pre-screening commodities for the presence of quarantine pathogens.
Documents
Moins de détails

Performance of midply shear wall

https://library.fpinnovations.ca/fr/permalink/fpipub8570
Auteur
Ni, Chun
Dagenais, Christian
Qian, Cheng
Hu, Lin
Date
January 2022
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Ni, Chun
Dagenais, Christian
Qian, Cheng
Hu, Lin
Date
January 2022
Genre du document
Research report
Description physique
5 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Cross Laminated Timber (CLT)
Performance
Building construction
Building materials
Seismic
Shear walls
Standards
Série
InfoNote 2022 N.2
Langue
English
Résumé
A number of test series have been conducted at FPInnovations to evaluate the lateral resistance, fire resistance, and acoustic performance of the new Midply shear wall configuration. The results showed that the seismic force modification factors prescribed in the NBCC can be used, along with the enhanced lateral strength and stiffness. Moreover, with some minor design considerations, it was found that the new Midply with the resilient channels and insulation materials in both sides of the wall and both cavities can provide at least 1 hour of fire-resistance rating and provide at least an ASTC of 47.
Documents
Moins de détails

Rendement d'un mur de refend midply

https://library.fpinnovations.ca/fr/permalink/fpipub8571
Auteur
Ni, Chun
Dagenais, Christian
Qian, Cheng
Hu, Lin
Date
Janvier 2022
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Ni, Chun
Dagenais, Christian
Qian, Cheng
Hu, Lin
Date
Janvier 2022
Genre du document
Research report
Description physique
6 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Cross Laminated Timber (CLT)
Performance
Building construction
Building materials
Seismic
Shear walls
Standards
Série
InfoNote 2022 N.2
Langue
French
Résumé
Un certain nombre de séries d'essais ont été réalisées à FPInnovations pour évaluer la résistance latérale, la résistance au feu et la performance acoustique de la nouvelle configuration de mur de contreventement Midply. Les résultats ont montré que les facteurs de modification de la force sismique prescrits dans le CNBC peuvent être utilisés, avec une résistance et une rigidité latérales améliorées. De plus, avec quelques considérations de conception mineures, il a été constaté que le nouveau mur de refend Midply avec les profilés souples et les matériaux d’isolation des deux côtés du mur et dans les deux cavités peut fournir au moins une heure de degré de résistance au feu et un ITSA d’au moins 47.
Documents
Moins de détails

In-situ identification of wood inhabiting microorganisms

https://library.fpinnovations.ca/fr/permalink/fpipub8580
Auteur
Dale, Angela
Kus, Stacey
Date
March 2022
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Dale, Angela
Kus, Stacey
Date
March 2022
Genre du document
Research report
Description physique
16 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Genetic
Micro organisms
Wood
Wood products
Série
Techncial Reports TR 2022 N 15
Langue
English
Résumé
To improve the accessibility of genomics for the identification of wood inhabiting microorganisms to FPInnovations’ members, we compared three different methods for metabarcoding on environmental DNA (eDNA): cloning with first generation Sanger sequencing, amplicon metabarcoding with second generation Illumina sequencing, and lastly amplicon metabarcoding with third generation, long read sequencing with the portable MinION. We looked at costs for each method, speed, and difficulty. Illumina metabarcoding was the most economically feasible method. Cloning was difficult, being prone to failure and requiring extensive trouble shooting to complete. Illumina metabarcoding must be outsourced which can take more time for project completion; however, little in-house troubleshooting is necessary. Third generation sequencing is an attractive alternative for routine analysis. It is rapid, low-cost, and takes little up-front capital for start-up. However, it may not be feasible if used infrequently given the time required to learn the technology and the rapid expiration of unused flow cells. For occasional projects, it is recommended to outsource amplicon metabarcoding to a facility that sequences either with second or third generation sequencers, including data analysis.
Documents
Moins de détails

Fire performance of mass timber

https://library.fpinnovations.ca/fr/permalink/fpipub8293
Auteur
Dagenais, Christian
Ranger, Lindsay
Date
Avril 2021
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Dagenais, Christian
Ranger, Lindsay
Date
Avril 2021
Genre du document
Research report
Description physique
6 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Fire
Building codes
Models
Performance
Standards
Timber
Langue
French
Résumé
La construction massive en bois est relativement nouvelle et sera bientôt intégrée dans le Code national du bâtiment du Canada (CNB). Il s'agit d'une solution à base de bois à prix compétitif qui complète les systèmes existants à ossature en bois et de construction en gros bois d’œuvre et constitue une option appropriée pour certaines applications qui utilisent actuellement du béton, de la maçonnerie ou de l'acier.
Documents
Moins de détails

Performance au feu du bois massif

https://library.fpinnovations.ca/fr/permalink/fpipub8294
Auteur
Dagenais, Christian
Ranger, Lindsay
Date
Avril 2021
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Dagenais, Christian
Ranger, Lindsay
Date
Avril 2021
Genre du document
Research report
Description physique
6 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Construction
Fire
Building codes
Models
Performance
Standards
Timber
Langue
French
Résumé
La construction massive en bois est relativement nouvelle et sera bientôt intégrée dans le Code national du bâtiment du Canada (CNB). Il s'agit d'une solution à base de bois à prix compétitif qui complète les systèmes existants à ossature en bois et de construction en gros bois d’œuvre et constitue une option appropriée pour certaines applications qui utilisent actuellement du béton, de la maçonnerie ou de l'acier.
Documents
Moins de détails

Fire performance of mass timber

https://library.fpinnovations.ca/fr/permalink/fpipub8295
Auteur
Dagenais, Christian
Ranger, Lindsay
Date
April 2021
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Dagenais, Christian
Ranger, Lindsay
Date
April 2021
Genre du document
Research report
Description physique
5 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Construction
Fire
Building codes
Models
Performance
Standards
Timber
Langue
English
Résumé
Mass timber construction is a relatively new type of construction soon to be implemented in the National Building Code of Canada (NBCC). It is a cost-competitive wood-based solution that complements existing wood-frame and heavy timber systems and is a suitable candidate for some applications which currently use concrete, masonry and/or steel.
Documents
Moins de détails

Advancing knowledge of mid-ply shear walls. Mid-ply shear wall fire resistance testing

https://library.fpinnovations.ca/fr/permalink/fpipub8306
Auteur
Ranger, Lindsay
Dagenais, Christian
Date
March 2021
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Ranger, Lindsay
Dagenais, Christian
Date
March 2021
Genre du document
Research report
Description physique
41 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Building construction
Design
Fire
Fire protection
Midply
Midply walls
Shear walls
Walls
Série
Technical Report TR 2021 No.78
Langue
English
Résumé
The objective of this research is to address a knowledge gap related to fire performance of midply shear walls. Testing has already been done to establish the structural performance of these assemblies. To ensure their safe implementation and their broad acceptance, this project will establish fire resistance ratings for midply shear walls. Fire tests will provide information for the development of design considerations for midply shear walls and confirm that they can achieve at least 1-hour fire-resistance ratings that are required for use in mid-rise buildings.
This research will support greater adoption of mid-rise residential and non-residential wood-frame construction and improve competition with similar buildings of noncombustible construction. This work will also support the development of the APA system report for midply walls, which will be a design guideline for using midply walls in North America.
Documents
Moins de détails

In-Situ performance testing of a six-storey wood-frame building in Victoria: building vibration, and sound insulation

https://library.fpinnovations.ca/fr/permalink/fpipub8336
Auteur
Mazloomi, Mohammad-Sadegh
Date
September 2021
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Mazloomi, Mohammad-Sadegh
Date
September 2021
Genre du document
Research report
Description physique
24 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Acoustic
Construction materials
Maintenance
Performance
Testing
Vibration
Série
Technical Report TR 2021 N.81
Langue
English
Résumé
Mid-rise and tall-wood buildings are gaining in popularity in the marketplace. Compared to the traditional low-rise buildings, wind-induced vibrations need to be controlled in taller buildings. Due to the lightweight nature of wood construction, wind-induced vibrations are larger in amplitude when compared to buildings built with heavier materials, such as concrete. The NBCC design method requires natural frequencies and damping ratios as inputs (NRC 2015). However, there is little data available about mid-rise and tall-wood buildings' dynamic performance (i.e., frequencies and damping ratios). Lack of data and experience of the wind-induced vibration performance of wood buildings can result in unsatisfactory design of mid-rise wood buildings, which can undergo excessive wind-induced vibration. It can also result in unnecessary overdesign of mid-rise and tall-wood buildings with increased construction costs.
Documents
Moins de détails

Field hygrothermal performance of R22+ wood-frame walls in Vancouver

https://library.fpinnovations.ca/fr/permalink/fpipub8066
Auteur
Wang, Jieying
Date
March 2021
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Wang, Jieying
Date
March 2021
Genre du document
Research report
Description physique
8 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Wood frame
Performance
British Columbia
Climate
Environment
Series
InfoNote 2021 no. 3
Langue
English
Résumé
A test program was conducted to generate hygrothermal performance data for light-wood-frame exterior walls meeting the R22 effective (RSI 3.85) requirement for buildings up to six storeys in the City of Vancouver. Six types of exterior wall assemblies, with 12 wall panels in total, were tested using a test hut located in the rear yard of FPInnovations’ Vancouver aboratory. This document provides a brief summary of the test and performance of these walls based on the data collected over the 19 months’ period from October 2018 to May 2020
Documents
Moins de détails

Le Rendement hygrothermique de murs à ossature de bois R22+ à Vancouver

https://library.fpinnovations.ca/fr/permalink/fpipub8067
Auteur
Wang, Jieying
Date
Mars 2021
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Wang, Jieying
Date
Mars 2021
Genre du document
Research report
Description physique
9 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Building Systems
Sujet
Wood frame
Performance
British Columbia
Climate
Environment
Series
InfoNote 2021 no. 3
Langue
French
Résumé
Un programme d’essais a été réalisé en vue de générer des données sur le rendement hygrothermique des murs à ossature légère de bois qui répondent à l’exigence R22 (RSI 3,85) pour les bâtiments d'au plus six étages à Vancouver. Six types d’assemblage de mur extérieur, avec un total de 12 murs extérieurs, ont été mis à l’essai à l’aide d’une hutte d’essai située dans la cour arrière du laboratoire de FPInnovations à Vancouver. Le présent document présente un court résumé de l’essai et du rendement de ces murs en se basant sur les données recueillies sur une période de 19 mois, soit d’octobre 2018 à mai 2020 (Wang 2021).
Documents
Moins de détails

Use of molecular diagnostic tools for pest detection in forestry

https://library.fpinnovations.ca/fr/permalink/fpipub8070
Auteur
Uzunovic, Adnan
Dale, Angela
Kus, Stacey
Date
March 2021
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Uzunovic, Adnan
Dale, Angela
Kus, Stacey
Date
March 2021
Genre du document
Research report
Description physique
24 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Detection
Insects
Inspection
Pathogens
Regulations
Research
Wood
Série
Technical Report; TR 2021 N.31
Langue
English
Résumé
Large volumes of forest products are traded internationally. With this comes an increased risk of moving forest pathogens associated with these products. To protect both forest health and international trade, prevention or control of pest movement and establishment needs to be done using approaches which result in minimal trade interruption. Rapid, economical, and accurate detection, identification and risk assessment of pathogens is one of the key aspects of successful management. Significant developments in the last two decades in genomics has enabled more accurate and rapid detection of pathogens. However, many of these techniques have not been thoroughly tested in wood and lack associated standards governing their use in a regulatory setting. There are ongoing concerns that these new methods will add regulatory compliance costs to industry and other stakeholders, or that they will be used improperly and unduly limit market access. To address these concerns, it is critical that the capabilities and limits of these tools are well understood by both industry and international regulators, and that standards are developed to govern their use to help reduce the threat of pests while minimizing the impact to trade. This report summarizes current technologies and suggests ways forward.
Documents
Moins de détails

Expanding wood use towards 2025: seismic performance of midply shear walls, year 2

https://library.fpinnovations.ca/fr/permalink/fpipub8109
Auteur
Ni, Chun
Chen, Zhiyong
Date
March 2021
Édition
March 2021
Genre du document
Research report
Domaine
Sustainable Construction
Auteur
Ni, Chun
Chen, Zhiyong
Collaborateur
Engineered Wood Assocation (APA)
American Wood Council (AWC)
Date
March 2021
Édition
March 2021
Genre du document
Research report
Description physique
52 p.
Secteur
Wood Products
Domaine
Sustainable Construction
Champ de recherche
Advanced Wood Materials
Sujet
Cross Laminated Timber (CLT)
Performance
Building construction
Building materials
Seismic
Shear walls
Standards
Série
Expanding wood use towards 2025
Technical Report TR 2021 N43
Langue
English
Résumé
Midply shear wall, which was originally developed by researchers at Forintek Canada Corp. (predecessor of FPInnovations) and the University of British Columbia, is a high-capacity shear wall system that is suitable for high wind and seismic loadings. Its superior seismic performance was demonstrated in a full-scale earthquake simulation test of a 6-storey wood-frame building in Japan. In collaboration with APA–The Engineered Wood Association and the American Wood Council (AWC), a new framing arrangement was designed in this study to increase the vertical load resistance of midply shear walls and make it easier to accommodate electrical and plumbing services. In this study, a total of 12 midply shear wall specimens in four wall configurations with different sheathing thicknesses and nail spacing were tested under reversed cyclic loading. Test results showed that the modified midply shear walls have approximately twice the lateral load capacity of a comparable standard shear wall. The drift capacity and energy dissipation capability are also greater than comparable standard shear wall. Seismic equivalency to standard shear walls in accordance with ASTM D7989 was also conducted. Results show that an overstrength factor of 2.5 and can be used to assign allowable design strengths of midply shear walls with 7/16” and nail spacing at 4” or 3” on center. For midply shear walls with 19/32” OSB, a higher overstrength factor must be used to meet the ductility criteria. The information from this study will support code implementation of the midply shear walls in Canadian and US timber design standards, thereby providing more design options for light wood frame structures in North America.
Documents
Moins de détails

1864 notices – page 1 of 94.