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10 records – page 1 of 1.

Analysis of the Timber-Concrete Composite Systems with Ductile Connection

https://research.thinkwood.com/en/permalink/catalogue113
Year of Publication
2013
Topic
Mechanical Properties
Material
Timber-Concrete Composite
Application
General Application
Author
Zhang, Chao
Organization
University of Toronto
Year of Publication
2013
Country of Publication
Canada
Format
Thesis
Material
Timber-Concrete Composite
Application
General Application
Topic
Mechanical Properties
Keywords
Bending
Ductility
Model
Load Deflection
Tension
Shear Connection
Language
English
Research Status
Complete
Online Access
Free
Resource Link
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Chapter 1: Introduction To Cross-Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue820
Year of Publication
2013
Topic
General Information
Material
CLT (Cross-Laminated Timber)
Application
General Application
Author
Gagnon, Sylvain
Bilek, Ted
Podesto, Lisa
Crespell, Pablo
Organization
FPInnovations
Binational Softwood Lumber Council
Year of Publication
2013
Country of Publication
Canada
United States
Format
Book Section
Material
CLT (Cross-Laminated Timber)
Application
General Application
Topic
General Information
Keywords
Codes
Construction
Language
English
Research Status
Complete
Series
CLT Handbook - US Edition
ISBN
978-0-86488-553-1
ISSN
1925-0495
Abstract
Cross-laminated timber (CLT), a new generation of engineered wood product developed initially in Europe, has been gaining increased popularity in residential and non-residential applications in several countries. Many impressive low- and mid-rise buildings built around the world using CLT showcase the many advantages this product has to offer to the construction sector. In this Chapter, we put forward an introduction to CLT as a product and CLT construction in general, along with different examples of buildings and other structures made with CLT panels. CLT is now available in North America and several projects already built in Canada and the United States, using CLT, are presented in this Chapter. An assessment of market opportunity for CLT based on the latest construction statistics for the United States is also presented.
Online Access
Free
Resource Link
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Chapter 2: Cross-Laminated Timber Manufacturing

https://research.thinkwood.com/en/permalink/catalogue821
Year of Publication
2013
Topic
General Information
Material
CLT (Cross-Laminated Timber)
Application
General Application
Author
Yeh, Borjen
Kretschmann, Dave
Wang, Brad
Organization
FPInnovations
Binational Softwood Lumber Council
Year of Publication
2013
Country of Publication
Canada
United States
Format
Book Section
Material
CLT (Cross-Laminated Timber)
Application
General Application
Topic
General Information
Keywords
Manufacturing
Language
English
Research Status
Complete
Series
CLT Handbook - US Edition
ISBN
978-0-86488-554-8
ISSN
1925-0495
Abstract
This Chapter provides general information about the manufacturing of CLT that may be of interest to the design community. The information contained in this Chapter may also provide guidance to CLT manufacturers in the development of their plant operating specification document. Typical steps of the CLT manufacturing process are described, and key process variables affecting adhesive bond quality of CLT products are discussed. The manufacturing, qualification, and quality assurance requirements in accordance with the American National Standard for Performance-Rated Cross-Laminated Timber, ANSI/APA PRG 320, are discussed.
Online Access
Free
Resource Link
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Chapter 3: Structural Design of Cross-Laminated Timber Elements

https://research.thinkwood.com/en/permalink/catalogue822
Year of Publication
2013
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
General Application
Author
Ross, Loren
Gagnon, Sylvain
Keith, Edward
Organization
FPInnovations
Binational Softwood Lumber Council
Year of Publication
2013
Country of Publication
Canada
United States
Format
Book Section
Material
CLT (Cross-Laminated Timber)
Application
General Application
Topic
Mechanical Properties
Keywords
Flexural Properties
Modulus of Rupture
Shear
Stiffness
Strength
Language
English
Research Status
Complete
Series
CLT Handbook - US Edition
ISBN
978-0-86488-553-1
ISSN
1925-0495
Abstract
Building using cross-laminated timber (CLT) began in Europe about two decades ago and has used a variety of methods for structural analysis. Experimental testing methods were the most accurate, yet they lacked versatility because changes in lay-up, material, or even manufacturing methods could cause a need for new testing. Consequently, three analytical approaches have been created and are commonly used in Europe as none have been universally accepted to date. ... In the United States and Canada, the product standard (Standard for Performance-Rated Cross-Laminated Timber - ANSI/APA PRG 320) has adopted the Shear Analogy method to derive composite bending and shear stiffness properties.
Online Access
Free
Resource Link
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Chapter 4: Lateral Design of Cross Laminated Timber Buildings

https://research.thinkwood.com/en/permalink/catalogue823
Year of Publication
2013
Topic
Seismic
Material
CLT (Cross-Laminated Timber)
Application
General Application
Author
van de Lindt, John
Rammer, Douglas
Popovski, Marjan
Line, Philip
Pei, Shiling
Pryor, Steven
Organization
FPInnovations
Binational Softwood Lumber Council
Year of Publication
2013
Country of Publication
Canada
United States
Format
Book Section
Material
CLT (Cross-Laminated Timber)
Application
General Application
Topic
Seismic
Keywords
Seismic Design Coefficients
Lateral Loads
Numerical Model
R-factors
MCE
Language
English
Research Status
Complete
Series
CLT Handbook - US Edition
ISBN
978-0-86488-553-1
ISSN
1925-0495
Abstract
Cross-laminated timber (CLT) is an innovative wood product that was developed approximately two decades ago in Europe and has since been gaining in popularity. Based on the experience of European researchers and designers, it is believed that CLT can provide the U.S. market the opportunity to build mid- and high-rise wood buildings. This Chapter presents a summary of past research and state-of-the-art understanding of the seismic behavior of CLT. As a new structural system to the United States, the design of CLT for seismic applications is expected to be made through alternative method provisions of the building codes. Efforts to develop seismic design coefficients for use in the equivalent lateral force procedures in the United States are underway. Nonlinear numerical modeling of CLT is presented and used to provide and indication of the effect of designing with different R-factors. Using nominal CLT wall capacity values derived from isolated wall tests, the illustrative example showed that an R-factor of approximately 2 can result in a low probability of collapse (less than 10 percent) at MCE intensity.
Online Access
Free
Resource Link
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Chapter 5: Connections in Cross-Laminated Timber Buildings

https://research.thinkwood.com/en/permalink/catalogue824
Year of Publication
2013
Topic
Connections
Market and Adoption
Material
CLT (Cross-Laminated Timber)
Application
General Application
Author
Mohammad, Mohammad
Douglas, Bradford
Rammer, Douglas
Pryor, Steven
Organization
FPInnovations
Binational Softwood Lumber Council
Year of Publication
2013
Country of Publication
Canada
United States
Format
Book Section
Material
CLT (Cross-Laminated Timber)
Application
General Application
Topic
Connections
Market and Adoption
Keywords
Code Acceptance
Fasteners
International Building Code
North America
Language
English
Research Status
Complete
Series
CLT Handbook - US Edition
ISBN
978-0-86488-553-1
ISSN
1925-0495
Abstract
This Chapter focuses on a few fastening systems that reflect present-day practices, some being conventional, while others are proprietary. Given the recent introduction of CLT into the construction market, it is expected that new connection types will be developed over time. Issues associated with connection design specific to CLT assemblies are presented. The European design approach is also presented and the applicability of the National Design Specification (NDS) for Wood Construction design provisions for traditional fasteners in CLT such as bolts, dowels, nails, and wood screws are reviewed and design guidelines are provided. Several design examples are also given at the end to demonstrate how connections in CLT can be established using current NDS design provisions.
Online Access
Free
Resource Link
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Chapter 6: Duration of Load and Creep Factors for Cross-Laminated Timber Panels

https://research.thinkwood.com/en/permalink/catalogue825
Year of Publication
2013
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
General Application
Author
Pirvu, Ciprian
Douglas, Bradford
Yeh, Borjen
Organization
FPInnovations
Binational Softwood Lumber Council
Year of Publication
2013
Country of Publication
Canada
United States
Format
Book Section
Material
CLT (Cross-Laminated Timber)
Application
General Application
Topic
Mechanical Properties
Keywords
Creep
Duration of Load
Time Dependent Behavior
Language
English
Research Status
Complete
Series
CLT Handbook - US Edition
ISBN
978-0-86488-553-1
ISSN
1925-0495
Abstract
Cross-laminated timber (CLT) products are used as load-carrying slab and wall elements in structural systems, thus load duration and creep behavior are critical characteristics that must be addressed in structural design. Given its lay-up construction with orthogonal arrangement of layers bonded with structural adhesive, CLT is more prone to time-dependent deformations under load (creep) than other engineered wood products such as structural glued-laminated timber. Time dependent behavior of structural wood products is addressed in design standards by load duration factors that adjust design properties. Since CLT has been recently introduced into the North American market, the current design standards and building codes do not specify load duration and creep adjustment factors for CLT. Until this can be rectified, an approach is proposed in this Chapter for adopter of CLT systems in the United States. This includes not only load duration and service factors, but also an approach to accounting for creep in CLT structural elements.
Online Access
Free
Resource Link
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Chapter 11: Environmental Performance of Cross-Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue830
Year of Publication
2013
Topic
Environmental Impact
Material
CLT (Cross-Laminated Timber)
Application
General Application
Author
O'Connor, Jennifer
Podesto, Lisa
Barry, Alpha
Grann, Blane
Organization
FPInnovations
Binational Softwood Lumber Council
Year of Publication
2013
Country of Publication
Canada
United States
Format
Book Section
Material
CLT (Cross-Laminated Timber)
Application
General Application
Topic
Environmental Impact
Keywords
Life-Cycle Assessment
Mid-Rise
Volatile Organic Compounds
Environmental Footprint
North America
Sustainable Forest Practices
Indoor Air Quality
Language
English
Research Status
Complete
Series
CLT Handbook - US Edition
Abstract
The environmental footprint of CLT is frequently discussed as potentially beneficial when compared to functionally equivalent non-wood alternatives, particularly concrete systems. In this Chapter, the role of CLT in sustainable design is addressed. The embodied environmental impacts of CLT in a mid-rise building are discussed, with preliminary results from a comprehensive life cycle assessment (LCA) study. We also discuss other aspects of CLT's environmental profile, including impact on the forest resource and impact on indoor air quality from CLT emissions. The ability of the North American forest to sustainably support a CLT industry is an important consideration and is assessed from several angles, including a companion discussion regarding efficient use of material. Market projections and forest growth-removal are applied to reach a clear conclusion that CLT will not create a challenge to the sustainable forest practices currently in place in North America and safeguarded through legislation and/or third party certification programs. To assess potential impact on indoor air quality, CLT products with different thicknesses and glue lines were tested for their volative organic compounds (VOCs) including formaldehyde and acetaldehyde emissions. CLT was found to be in compliance with European labeling programs as well as the most stringent CARB limits for formaldehyde emissions. Testing was done on Canadian species, as there was no U.S. supplier of CLT at the time of this writing; because VOC emissions are affected by species, this work should be repeated from products made from different species.
Online Access
Free
Resource Link
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Chapter 12: Lifting and Handling of Cross-Laminated Timber Element

https://research.thinkwood.com/en/permalink/catalogue831
Year of Publication
2013
Topic
General Information
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
General Application
Author
Gagnon, Sylvain
Francis, Sam
Stockton, Bruce
Organization
FPInnovations
Binational Softwood Lumber Council
Year of Publication
2013
Country of Publication
Canada
United States
Format
Book Section
Material
CLT (Cross-Laminated Timber)
Application
General Application
Topic
General Information
Design and Systems
Keywords
Construction
Installation
Lifting Systems
Transportation
Language
English
Research Status
Complete
Series
CLT Handbook - US Edition
ISBN
978-0-86488-553-1
ISSN
1925-0495
Abstract
Cross-laminated timber (CLT) construction is a relatively new process. There is therefore very little specific technical documentation for the erection of structures designed and built with CLT panels. Current CLT manufacturers provide recommendations on lifting systems for the installation of prefabricated wood assemblies. However, technical documents currently available mostly come from Europe or Canada and may appear incomplete to some design professionals and builders/contractors in the United States. This Chapter presents a variety of lifting systems that can be used in the construction of structures using CLT panels. We discuss the basic theory required or suggested for proper lifting techniques. In addition, we introduce various tools and accessories that are frequently required for CLT construction, as well as good building practices to help contractors build safe and efficient CLT panel structures. Finally, we discuss issues related to the transportation of CLT assemblies from factory to building site. Regulatory aspects of transportation are also discussed. It is importat to note that the lifting, handling, and installation of CLT panels involve multiple interest groups including design professionals, contractors/erectors and CLT manufacturers, each with different areas of interest and expertise. Therefore, the information presented in this Chapter is broad in scope and may or may not be relevant to each interest group.
Online Access
Free
Resource Link
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Comparison of Sustainability Performance for Cross Laminated Timber and Concrete

https://research.thinkwood.com/en/permalink/catalogue509
Year of Publication
2013
Topic
Environmental Impact
Material
CLT (Cross-Laminated Timber)
Application
General Application
Author
Piacenza, Joseph
Tumer, Irem
Seyedmahmoudi, Seyedhamed
Haapala, Karl
Hoyle, Christopher
Publisher
ASME
Year of Publication
2013
Country of Publication
United States
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
General Application
Topic
Environmental Impact
Keywords
Life-Cycle Assessment
Social Impact
Sustainability
Reinforced Concrete
Economic Aspect
Manufacturing
Language
English
Conference
International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
Research Status
Complete
Notes
August 4–7, 2013, Portland, Oregon, USA
Online Access
Payment Required
Resource Link
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10 records – page 1 of 1.