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Insurance for Mass Timber Construction: Assessing Risk and Providing Answers

https://research.thinkwood.com/en/permalink/catalogue2875
Year of Publication
2021
Topic
General Information
Market and Adoption
Fire
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
NLT (Nail-Laminated Timber)
LVL (Laminated Veneer Lumber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Author
McLain, Richard
Brodahl, Susan
Organization
WoodWorks
Year of Publication
2021
Country of Publication
United States
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
NLT (Nail-Laminated Timber)
LVL (Laminated Veneer Lumber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Topic
General Information
Market and Adoption
Fire
Keywords
Insurance
Fire Risk
Water Damage Mitigation
Site Security
Construction Schedule
Language
English
Research Status
Complete
Summary
This paper is intended for developers and owners seeking to purchase insurance for mass timber buildings, for design/construction teams looking to make their designs and installation processes more insurable, and for insurance industry professionals looking to alleviate their concerns about safety and performance. For developers, owners and design/construction teams, it provides an overview of the insurance industry, including its history, what affects premiums, how risks are analyzed, and how project teams can navigate coverage for mass timber buildings. Insurance in general can seem like a mystery—what determines premium fluctuations, impacts of a strong vs. weak economy, and the varying roles of brokers, agents and underwriters. This paper will explain all of those aspects, focusing on the unique considerations of mass timber projects and steps that can be taken to make these buildings more insurable. For insurance brokers, underwriters and others in the industry, this paper provides an introduction to mass timber, including its growing use, code recognition and common project typologies. It also covers available information on fire performance and post-fire remediation, moisture impacts on building longevity, and items to watch for when reviewing specific projects.
Online Access
Free
Resource Link
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Joint Professional Practice Guidelines: Encapsulated Mass Timber Construction up to 12 Storeys

https://research.thinkwood.com/en/permalink/catalogue2772
Edition
Version 1.0 March 30, 2021
Year of Publication
2021
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
NLT (Nail-Laminated Timber)
PSL (Parallel Strand Lumber)
LSL (Laminated Strand Lumber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Organization
Architectural Institute of British Columbia (AIBC)
Engineers and Geoscientists British Columbia
Edition
Version 1.0 March 30, 2021
Year of Publication
2021
Country of Publication
Canada
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
NLT (Nail-Laminated Timber)
PSL (Parallel Strand Lumber)
LSL (Laminated Strand Lumber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Topic
Design and Systems
Keywords
Acoustics
Structural
Design
Building Enclosure
Architecture
Quality Assurance
Building Code
Encapsulated Mass Timber Construction
Engineering
Fire Protection
Language
English
Research Status
Complete
Summary
These Joint Professional Practice Guidelines – Encapsulated Mass Timber Construction Up to 12 Storeys were jointly prepared by the Architectural Institute of British Columbia (AIBC) and Engineers and Geoscientists British Columbia. The AIBC and Engineers and Geoscientists BC regulate and govern the professions of architecture, engineering, and geoscience under the Architects Act and the Professional Governance Act. The AIBC and Engineers and Geoscientists BC each have a regulatory mandate to protect the public interest, which is met in part by setting and maintaining appropriate academic, experience, and professional practice standards. Engineering Professionals are required per Section 7.3.1 of the Bylaws - Professional Governance Act to have regard for applicable standards, policies, plans, and practices established by the government or by Engineers and Geoscientists BC, including professional practice guidelines. For Engineering Professionals, these professional practice guidelines clarify the expectations for professional practice, conduct, and competence when providing engineering services for EMTC buildings. For Architects, these guidelines provide important information and identify issues to be considered when providing architectural services for EMTC buildings. These guidelines deal with the performance of specific activities in a manner such that Architects and Engineering Professionals can meet their professional obligations under the Architects Act and the Professional Governance Act. These guidelines were developed in response to new classifications of building size and construction relative to occupancy introduced in the 2018 British Columbia Building Code (BCBC), under Division B, Article 3.2.2.48EMTC. Group C, up to 12 storeys, Sprinklered, and Article 3.2.2.57EMTC. Group D, up to 12 storeys, Sprinklered. These new classifications were introduced in Revision 2 of the 2018 BCBC on December 12, 2019 and in Amendment 12715 of the 2019 Vancouver Building By-law (VBBL) on July 1, 2020. Additionally, provisions related to Encapsulated Mass Timber Construction (EMTC) were introduced in Revision 1 of the 2018 British Columbia Fire Code (BCFC) on December 12, 2019. These guidelines were first published in 2021 to provide guidance on architectural and engineering considerations relating to these significant changes to the 2018 BCBC, the 2019 VBBL, and the 2018 BCFC. For Engineering Professionals, these guidelines are intended to clarify the expectations of professional practice, conduct, and competence when Engineering Professionals are engaged on an EMTC building. For Architects, these guidelines inform and support relevant competency standards of practice to be met when Architects are engaged on an EMTC building. As with all building and construction types, the EMTC-specific code provisions prescribe minimum requirements that must be met. The majority of EMTC of 7 to 12 storeys are considered High Buildings, and as such are subject to the BCBC, Subsection 3.2.6. Additional Requirements for High Buildings.
Online Access
Free
Resource Link
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Mass Timber Building Science Primer

https://research.thinkwood.com/en/permalink/catalogue2797
Year of Publication
2021
Topic
Design and Systems
Moisture
Fire
Acoustics and Vibration
General Information
Connections
Market and Adoption
Serviceability
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
NLT (Nail-Laminated Timber)
Application
Wood Building Systems
Author
Kesik, Ted
Martin, Rosemary
Organization
Mass Timber Institute
RDH Building Science
Publisher
Mass Timber Institute
Year of Publication
2021
Country of Publication
Canada
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
NLT (Nail-Laminated Timber)
Application
Wood Building Systems
Topic
Design and Systems
Moisture
Fire
Acoustics and Vibration
General Information
Connections
Market and Adoption
Serviceability
Keywords
Mass Timber
Building Science
Language
English
Research Status
Complete
Summary
The development of this primer commenced shortly after the 2018 launch of the Mass Timber Institute (MTI) centered at the University of Toronto. Funding for this publication was generously provided by the Ontario Ministry of Natural Resources and Forestry. Although numerous jurisdictions have established design guides for tall mass timber buildings, architects and engineers often do not have access to the specialized building science knowledge required to deliver well performing mass timber buildings. MTI worked collaboratively with industry, design professionals, academia, researchers and code experts to develop the scope and content of this mass timber building science primer. Although provincially funded, the broader Canadian context underlying this publication was viewed as the most appropriate means of advancing Ontario’s nascent mass timber building industry. This publication also extends beyond Canada and is based on universally applicable principles of building science and how these principles may be used anywhere in all aspects of mass timber building technology. Specifically, these guidelines were developed to guide stakeholders in selecting and implementing appropriate building science practices and protocols to ensure the acceptable life cycle performance of mass timber buildings. It is essential that each representative stakeholder, developer/owner, architect/engineer, supplier, constructor, wood erector, building official, insurer, and facility manager, understand these principles and how to apply them during the design, procurement, construction and in-service phases before embarking on a mass timber building project. When mass timber building technology has enjoyed the same degree of penetration as steel and concrete, this primer will be long outdated and its constituent concepts will have been baked into the training and education of design professionals and all those who fabricate, construct, maintain and manage mass timber buildings. One of the most important reasons this publication was developed was to identify gaps in building science knowledge related to mass timber buildings and hopefully to address these gaps with appropriate research, development and demonstration programs. The mass timber building industry in Canada is still a collection of seedlings that continue to grow and as such they deserve the stewardship of the best available building science knowledge to sustain them until such time as they become a forest that can fend for itself.
Online Access
Free
Resource Link
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Mass Timber Design Manual

https://research.thinkwood.com/en/permalink/catalogue2780
Year of Publication
2021
Topic
Acoustics and Vibration
Connections
Cost
Design and Systems
Energy Performance
Environmental Impact
Fire
General Information
Moisture
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
NLT (Nail-Laminated Timber)
Application
Wood Building Systems
Organization
WoodWorks
Think Wood
Year of Publication
2021
Country of Publication
United States
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
NLT (Nail-Laminated Timber)
Application
Wood Building Systems
Topic
Acoustics and Vibration
Connections
Cost
Design and Systems
Energy Performance
Environmental Impact
Fire
General Information
Moisture
Keywords
Mass Timber
United States
Building Systems
Tall Wood
Sustainability
IBC
Applications
Language
English
Research Status
Complete
Summary
This manual is helpful for experts and novices alike. Whether you’re new to mass timber or an early adopter you’ll benefit from its comprehensive summary of the most up to date resources on topics from mass timber products and applications to tall wood construction and sustainability. The manual’s content includes WoodWorks technical papers, Think Wood continuing education articles, case studies, expert Q&As, technical guides and other helpful tools. Click through to view each individual resource or download the master resource folder for all files in one handy location. For your convenience, this book will be updated annually as mass timber product development and the market are quickly evolving.
Online Access
Free
Resource Link
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U.S. Mass Timber Construction Manual

https://research.thinkwood.com/en/permalink/catalogue2873
Year of Publication
2021
Topic
General Information
Site Construction Management
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
NLT (Nail-Laminated Timber)
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Organization
WoodWorks
Year of Publication
2021
Country of Publication
United States
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
NLT (Nail-Laminated Timber)
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Topic
General Information
Site Construction Management
Keywords
Preconstruction
Moisture Control
Installation
Close-out
Language
English
Research Status
Complete
Summary
The U.S. Mass Timber Construction Manual was developed to give contractors and installers a framework for the planning, procurement, and management of mass timber projects, and to provide a bridge from their experience with other systems. Mass timber is unique in that it draws installation techniques from other construction types, so people with concrete, precast, tilt-up, and structural steel experience can readily adapt to these materials. However, understanding how mass timber differs from other building systems is key to cost effectiveness. The manual was produced with primary funding from the U.S. Endowment for Forestry and Rural Communities, in collaboration with WoodWorks’ mass timber manufacturing partners in the U.S. and Canada. While intended primarily for GCs and installers, it is a useful reference for all members of a mass timber project team and anyone interested in the construction of mass timber buildings.
Online Access
Free
Resource Link
Less detail

U.S. Mass Timber Floor Vibration Design Guide

https://research.thinkwood.com/en/permalink/catalogue2874
Year of Publication
2021
Topic
Acoustics and Vibration
Material
CLT (Cross-Laminated Timber)
NLT (Nail-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Floors
Organization
WoodWorks
Year of Publication
2021
Country of Publication
United States
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
NLT (Nail-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Floors
Topic
Acoustics and Vibration
Keywords
Floor Vibration
Vibration Design Methods
Finite Element Modeling
Language
English
Research Status
Complete
Summary
The scope of this guide focuses on the design of mass timber floor systems to limit human-induced vibration. The primary performance goal is to help designers achieve a low probability of adverse comment regarding floor vibrations in a manner consistent with the vibration design guides for steel and concrete systems. This includes excitation primarily from human walking as observed by other people in the building. Some treatment of design for sensitive equipment in response to human walking is also discussed. This design guide covers the range of currently available mass timber panels, including cross-laminated timber (CLT) manufactured from either solid sawn or structural composite lumber (SCL) laminations, nail-laminated timber (NLT), dowel laminated timber (DLT) and glue-laminated timber (GLT), as well as their support framework of timber beams. The target user of this guide is a design professional with working knowledge of mass timber structural design and some background knowledge of structural dynamics as related to floor vibrations. It may be particularly useful to design engineers with limited experience with vibration analysis, experienced multi-material engineers familiar with vibration analysis but unfamiliar with mass timber vibration, and applications engineers assisting manufacturers in the development of solutions and proposals for projects.
Online Access
Free
Resource Link
Less detail

WoodWorks Index of Mass Timber Connections

https://research.thinkwood.com/en/permalink/catalogue2876
Year of Publication
2021
Topic
Connections
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
NLT (Nail-Laminated Timber)
MPP (Mass Plywood Panel)
LSL (Laminated Strand Lumber)
Application
Wood Building Systems
Organization
WoodWorks
Year of Publication
2021
Country of Publication
United States
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
NLT (Nail-Laminated Timber)
MPP (Mass Plywood Panel)
LSL (Laminated Strand Lumber)
Application
Wood Building Systems
Topic
Connections
Keywords
Aesthetics
Load-Carrying Capacity
Fire Resistance Rating
Quality Assurance
Cost
Constructability
Language
English
Research Status
Complete
Summary
This index is a compilation of connections used in mass timber construction. Mass timber elements are solid wood pieces with inherent fire resistance due to their mass, as defined in the 2021 International Building Code (IBC). Examples of mass timber include but are not limited to cross laminated timber (CLT), dowel-laminated timber (DLT), nail-laminated timber (NLT), glue-laminated timber (GLT), mass plywood panels (MPP), and structural composite lumber (SCL) products such as laminated veneer lumber (LVL) and laminated strand lumber (LSL). Mass timber can be used as structural floors, roofs, walls, columns and/or beams. The examples in this index illustrate a broad spectrum of connections for use in mass timber construction. Depending on the unique constraints of each project, the connection choice made by the designer may be influenced by aesthetics, load carrying capacity, fire-rating requirements, quality assurance requirements, cost and/or constructability. The purpose of the index is to facilitate the designer’s selection of project appropriate connections.
Online Access
Free
Resource Link
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Construction Moisture Management, Cross Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue2685
Year of Publication
2020
Topic
Moisture
Material
CLT (Cross-Laminated Timber)
Author
Wang, Jieying
Organization
FPInnovations
Year of Publication
2020
Country of Publication
Canada
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
Topic
Moisture
Keywords
Wetting
Risk Mitigation
Drying
Language
English
Research Status
Complete
Summary
Cross-Laminated Timber (CLT) is an engineered mass timber product manufactured by laminating dimension lumber in layers with alternating orientation using structural adhesives. It is intended for use under dry service conditions and is commonly used to build floors, roofs, and walls. Because prolonged wetting of wood may cause staining, mould, excessive dimensional change (sometimes enough to fail connectors), and even result in decay and loss of strength, construction moisture is an important consideration when building with CLT. This document aims to provide technical information to help architects, engineers, and builders assess the potential for wetting of CLT during building construction and identify appropriate actions to mitigate the risk.
Online Access
Free
Resource Link
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Cross-Laminated Timber Design: Structural Properties, Standards, and Safety

https://research.thinkwood.com/en/permalink/catalogue2534
Year of Publication
2020
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Mahamid, Mustafa
Publisher
McGraw Hill
Year of Publication
2020
Country of Publication
Canada
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Design and Systems
Keywords
Structural Design
Code Provisions
Design Recommendations
Sustainability
Environmental Issues
Language
English
Research Status
Complete
ISBN
1260117995
Summary
This comprehensive guide explains the design standards, code provisions, and safety requirements engineers need to know to use cross-laminated timber as a structural building material. The book covers all applicable design considerations, including the relevant structural load requirements and fire safety requirements. Written by a collection of experts in the field, Cross-Laminated Timber Design: Structural Properties, Standards, and Safety introduces the material properties of CLT and goes on to cover the recommended lateral and vertical design standards. Design examples and case studies are featured throughout. You will get design recommendations for connections, building envelopes, acoustics for CLT projects, and much more. Sustainability and environmental issues are discussed in full detail. - Covers the latest methods and design techniques being used for CLT - Explains the code provisions in the NDS, ASCE 7, and IBC that apply to CLT - Include contributions from some of the leading experts in the field
Online Access
Payment Required
Resource Link
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Design Guide for Timber-Concrete Composite Floors in Canada

https://research.thinkwood.com/en/permalink/catalogue2460
Year of Publication
2020
Topic
Design and Systems
Connections
Acoustics and Vibration
Fire
Material
Timber-Concrete Composite
Application
Floors
Organization
FPInnovations
Year of Publication
2020
Country of Publication
Canada
Format
Book/Guide
Material
Timber-Concrete Composite
Application
Floors
Topic
Design and Systems
Connections
Acoustics and Vibration
Fire
Keywords
Shear Connection
Ultimate Limit States
Vibration
Fire Resistance
Language
English
Research Status
Complete
Summary
As part of its research work on wood buildings, FPInnovations has recently launched a Design Guide for Timber-Concrete Composite Floors in Canada. This technique, far from being new, could prove to be a cost-competitive solution for floors with longer-span since the mechanical properties of the two materials act in complementarity. Timber-concrete systems consist of two distinct layers, a timber layer and a concrete layer (on top), joined together by shear connectors. The properties of both materials are then better exploited since tension forces from bending are mainly resisted by the timber, while compression forces from bending are resisted by the concrete. This guide, which contains numerous illustrations and formulas to help users better plan their projects, addresses many aspects of the design of timber-concrete composite floors, for example shear connection systems, ultimate limit state design, vibration and fire resistance of floors, and much more.
Online Access
Free
Resource Link
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Gestion de l'Humidité en Construction, Bois Lamellé-Croisé

https://research.thinkwood.com/en/permalink/catalogue2686
Year of Publication
2020
Topic
Moisture
Material
CLT (Cross-Laminated Timber)
Author
Wang, Jieying
Organization
FPInnovations
Year of Publication
2020
Country of Publication
Canada
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
Topic
Moisture
Keywords
Wetting
Risk Mitigation
Drying
Language
French
Research Status
Complete
Summary
Le bois lamellé-croisé (CLT) est un produit massif de bois d’ingénierie qui est fabriqué à partir de multiples pièces de bois de dimension assemblées en couches orthogonales avec des adhésifs structuraux. Ce produit est conçu pour des conditions de service sèches et est couramment utilisé pour construire des planchers, des toits et des murs. Comme l’humidification prolongée du bois peut causer des taches, de la moisissure, des variations dimensionnelles excessives (parfois suffisantes pour provoquer la défaillance des attaches), et même la pourriture et la perte de résistance, l’humidité est un facteur important dans la construction avec le CLT. Le présent document a pour but de fournir de l’information technique pouvant aider les architectes, les ingénieurs et les constructeurs à évaluer les risques d’humidification du CLT pendant la construction de bâtiments et à prendre les mesures appropriées pour atténuer ces risques.
Online Access
Free
Resource Link
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National Fire Code Requirements - Course of Construction: Tall Wood Buildings

https://research.thinkwood.com/en/permalink/catalogue2759
Year of Publication
2020
Topic
Fire
Application
Wood Building Systems
Organization
Canadian Wood Council
Year of Publication
2020
Country of Publication
Canada
Format
Book/Guide
Application
Wood Building Systems
Topic
Fire
Keywords
National Building Code of Canada
Construction
Fire Safety
Fire Protection
Language
English
Research Status
Complete
Summary
The vulnerability of any building, regardless of the material used, in a fire situation is higher during the construction phase when compared to the susceptibility of the building after it has been completed and occupied. This is because the risks and hazards found on a construction site differ both in nature and potential impact from those in a completed building; and these risks are occurring at a time when the fire prevention elements that are designed to be part of the completed building are not yet in place. For these reasons, construction site fire safety includes some unique challenges. Developing an understanding of these hazards and their potential risks is the first step towards fire prevention and mitigation during the course of construction (CoC).
Online Access
Free
Resource Link
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Tall Wood Buildings: Design, Construction and Performance

https://research.thinkwood.com/en/permalink/catalogue2483
Edition
Second Edition
Year of Publication
2020
Topic
General Information
Design and Systems
Market and Adoption
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Author
Green, Michael
Taggart, Jim
Edition
Second Edition
Publisher
Birkhauser
Year of Publication
2020
Country of Publication
Switzerland
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Topic
General Information
Design and Systems
Market and Adoption
Keywords
Tall Wood
Case Study
Building Systems
Built Projects
Language
English
Research Status
Complete
ISBN
978-3035618853
Summary
Tall wood buildings have been at the foreground of innovative building practice in urban contexts for a number of years. From London to Stockholm, from Vancouver to Melbourne timber buildings of up to 20 storeys have been built, are under construction or being considered. This dynamic trend was enabled by developments in the material itself, prefabrication and more flexibility in fire regulations. The low CO2 footprint of wood - often regionally sourced - is another strong argument in its favour. This publication explains the typical construction types such as panel systems, frame and hybrid systems. An international selection of 13 case studies is documented in detail with many specially prepared construction drawings, demonstrating the range of the technology.
Online Access
Payment Required
Resource Link
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CLT Handbook - Canadian Edition

https://research.thinkwood.com/en/permalink/catalogue819
Edition
2nd Edition
Year of Publication
2019
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Organization
FPInnovations
Editor
Karacabeyli, Erol
Gagnon, Sylvain
Edition
2nd Edition
Year of Publication
2019
Country of Publication
Canada
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Language
English
Research Status
Complete
Summary
The CLT Handbook provides vital “How to” information on CLT for the design and construction community, and is a great source of information for regulatory authorities, fire services and others. The CLT Handbook is also a good textbook for university level timber engineering courses. In summary, the Canadian CLT Handbook will remain the most comprehensive reference for sharing the latest technical information on North American CLT. The Canadian edition of the CLT Handbook, first published in 2011 under the Transformative Technologies Program of the Natural Resources Canada, played an imperative role in accelerating the use and acceptance of CLT in North America. Its introduction subsequently led to the publication of the US Edition. The Canadian Edition supported the early use of CLT products from Canadian manufacturers in many small to large projects across Canada and the US, and paved the way for CLT and other wood products to be used in new applications like tall and large buildings, and bridges. Since then, additional research has taken place globally and substantial regulatory changes have occurred enabling more wood to be used in construction. Those developments highlighted a need for the CLT Handbook to be updated. The 2019 Edition of the CLT Handbook, for example, augments the recently developed CLT provisions in CSA Standard in Engineering Design in Wood and it includes a design example of an 8-storey CLT building. It helps expand the knowledge base of the designers about CLT enabling them to develop alternative solutions for taller and larger buildings that are beyond the boundaries of the acceptable solutions in building codes.
Online Access
Free
Resource Link
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Encapsulated Mass Timber Construction: Guidelines for Encapsulation Details and Techniques

https://research.thinkwood.com/en/permalink/catalogue2600
Year of Publication
2019
Topic
Design and Systems
Fire
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
NLT (Nail-Laminated Timber)
Application
Wood Building Systems
Author
Ranger, Lindsay
Geraghty, Simon
Jeske, Judy
Rahmani, Alma
Dorsey, Cheryl
Organization
FPInnovations
Year of Publication
2019
Country of Publication
Canada
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
NLT (Nail-Laminated Timber)
Application
Wood Building Systems
Topic
Design and Systems
Fire
Keywords
Encapsulated Mass Timber Construction
EMTC
Fire Protection
Construction Safety
Language
English
Research Status
Complete
Summary
The purpose of this guide is to provide an introduction to the concept of encapsulated mass timber construction. This guide provides an overview of encapsulation techniques for mass timber construction, and other related fire protection measures, and summarizes some approved encapsulation materials and application methods and identifies additional requirements for safety during construction. This guide is intended to help architects, engineers and designers by reducing uncertainty and allowing for more confidence in design, as well as providing authorities having jurisdiction and inspectors with a reference for simple design review.
Online Access
Free
Resource Link
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Fire Separations & Fire-resistance Ratings

https://research.thinkwood.com/en/permalink/catalogue2758
Year of Publication
2019
Topic
Fire
Application
Floors
Walls
Wood Building Systems
Organization
Canadian Wood Council
Year of Publication
2019
Country of Publication
Canada
Format
Book/Guide
Application
Floors
Walls
Wood Building Systems
Topic
Fire
Keywords
Fire Separations
Fire-Resistance Ratings
National Building Code of Canada
Barriers
Fire Spread
Testing Methods
Language
English
Research Status
Complete
Summary
Fire separations and fire-resistance ratings are often required together but they are not interchangeable terms, nor are they necessarily mutually inclusive. The National Building Code of Canada (NBC)1 provides the following definitions: A fire separation is defined as “a construction assembly that acts as a barrier against the spread of fire.” A fire-resistance rating is defined as “the time in minutes or hours that a material or assembly of materials will withstand the passage of flame and the transmission of heat when exposed to fire under specified conditions of test and performance criteria, or as determined by extension or interpretation of information derived therefrom as prescribed in [the NBC].” In many buildings, the structural members such as beams and columns, and structural or non-structural assemblies such as walls and floors, are required to exhibit some degree of resistance to fire in order to prevent the spread of fire and smoke, and/or to minimize the risk of collapse of the building in the event of a fire. However, fire separations are assemblies that may or may not be required to have a specific fire-resistance rating, while structural members such as beams and columns that require a fireresistance rating to maintain the structural stability of a building in the event of a fire are not fire separations because they do not “act as a barrier against the spread of fire.”
Online Access
Free
Resource Link
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Guide to Calculating Airborne Sound Transmission in Buildings: Fifth Edition, December 2019

https://research.thinkwood.com/en/permalink/catalogue2617
Year of Publication
2019
Topic
Acoustics and Vibration
Design and Systems
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Floors
Walls
Author
Hoeller, Christoph
Quirt, David
Mahn, Jeffrey
Müller-Trapet, Markus
Organization
National Research Council of Canada. Construction
Publisher
National Research Council of Canada. Construction
Year of Publication
2019
Country of Publication
Canada
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Floors
Walls
Topic
Acoustics and Vibration
Design and Systems
Keywords
Apparent Sound Transmission Class
Sound Insulation
Sound Transmission
Concrete
Building Code
Impact Sound
Language
English
Research Status
Complete
Summary
In recent years, the science and engineering for controlling sound transmission in buildings have shifted from a focus on individual assemblies such as walls or floors, to a focus on performance of the complete system. Standardized procedures for calculating the overall transmission, combined with standardized measurements to characterize sub-assemblies, provide much better prediction of sound transmission between adjacent indoor spaces. The International Standards Organization (ISO) has published a calculation method, ISO 15712-1 that uses laboratory test data for sub-assemblies such as walls and floors as inputs for a detailed procedure to calculate the expected sound transmission between adjacent rooms in a building. This standard works very well for some types of construction, but to use it in a North American context one must overcome two obstacles – incompatibility with the ASTM standards used by our construction industry, and low accuracy of its predictions for lightweight wood or steel frame construction. To bypass limitations of ISO 15712-1, this Guide explains how to merge ASTM and ISO test data in the ISO calculation procedure, and provides recommendations for applying extended measurement and calculation procedures for specific common types of construction. This Guide was developed in a project established by the National Research Council of Canada to support the transition of construction industry practice to using apparent sound transmission class (ASTC) for sound control objectives in the National Building Code of Canada (NBCC). However, the potential range of application goes beyond the minimum requirements of the NBCC – the Guide also facilitates design to provide enhanced sound insulation, and should be generally applicable to construction in both Canada and the USA. This publication contains a limited set of examples for several types of construction, to provide an introduction and overview of the ASTC calculation procedure. Additional examples and measurement data can be found in the companion documents to this Guide, namely NRC Research Reports RR-333 to RR-337. Furthermore, the calculation procedure outlined and illustrated in this Guide is also used by the software web application soundPATHS, which is available for free on the website of the National Research Council of Canada (see the references in Section 7 of this Guide for access details).
Online Access
Free
Resource Link
Less detail

Illustrated Guide for Designing Wood-Frame Buildings in Alberta to Meet the National Energy Code of Canada for Buildings

https://research.thinkwood.com/en/permalink/catalogue1917
Year of Publication
2019
Topic
Design and Systems
Application
Building Envelope
Author
Wang, Jieying
Organization
FPInnovations
Year of Publication
2019
Country of Publication
Canada
Format
Book/Guide
Application
Building Envelope
Topic
Design and Systems
Keywords
Building Codes
Energy Efficiency
Mid-Rise
Thermal
Language
English
Research Status
Complete
Online Access
Free
Resource Link
Less detail

Illustrated Guide R30+ Effective Vaulted & Flat Roofs

https://research.thinkwood.com/en/permalink/catalogue2348
Year of Publication
2019
Topic
Moisture
Energy Performance
Design and Systems
Material
Light Frame (Lumber+Panels)
Application
Roofs
Author
Marleau, Christopher
Higgins, James
Ricketts, Lorne
Roppel, Patrick
Publisher
BC Housing Research Centre
Year of Publication
2019
Country of Publication
Canada
Format
Book/Guide
Material
Light Frame (Lumber+Panels)
Application
Roofs
Topic
Moisture
Energy Performance
Design and Systems
Keywords
Vaulted Roofs
Water-Shedding Roofs
Flat Waterproof Membrane Roofs
Thermal Performance
Moisture Management
Air Leakage
Durability
Language
English
Research Status
Complete
Summary
This Illustrated Guide consolidates information on vaulted water-shedding roofs and flat waterproof membrane roofs that are capable of meeting R-30 or greater effective thermal performance when used on low- and mid-rise wood-frame buildings. The guide is intended to be an industry, utility, and government resource with respect to meeting this thermal performance level, while not compromising other aspects of building enclosure performance, including moisture management, air leakage, and durability.
Online Access
Free
Resource Link
Less detail

Lumber-Based Mass Timber Products in Construction

https://research.thinkwood.com/en/permalink/catalogue2163
Year of Publication
2019
Topic
General Information
Material
Glulam (Glue-Laminated Timber)
NLT (Nail-Laminated Timber)
DLT (Dowel Laminated Timber)
CLT (Cross-Laminated Timber)

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