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The 2025 Ottawa Wood Solutions Conference will be presented on February 5, 2025 at the National Arts Centre

December 19, 2024 (Ottawa) – The 2025 Ottawa Wood Solutions Conference will be presented on Wednesday, February 5, 2025, from 8:00 am to 5:00 pm, at the National Arts Centre, located at 1 Elgin St. in Ottawa. 

First launched over 20 years ago to serve design and construction professionals interested in building with wood, this event has evolved from a niche gathering into a cornerstone of professional education, driven by the growing demand for sustainable wood construction. The program offers a range of presentations—from technical deep dives to inspiring case studies—catering to participants at every stage of their professional journey, from newcomers to seasoned experts. Attendees can also take advantage of valuable opportunities to connect, collaborate, and expand their professional networks within the wood community. 

Conference organizers are delighted to welcome Christophe Ouhayoun of KOZ Architects (France) to share insights into the innovative, collaborative development of the Paris Olympics Athletes’ Village. His presentation will also explore the current effort underway to convert these structures into much-needed permanent housing, highlighting this progressive mass timber development as a model of adaptability and sustainability. 

Another program highlight pays tribute to the venue itself. Donald Schmitt, CM, of Diamond Schmitt Architects will present on the revitalization of the National Arts Centre, offering a behind-the-scenes look at the timber structure and prefabrication process that transformed this iconic building into a modern landmark. 

Other technical presentations include managing sound and vibration in mass timber buildings and growing Canadian capacity for industrialized wood construction, advancing wood products in our changing climate, and a discussion of the value of conventional wood frame construction in small communities where it provides job opportunities, with a specific focus on Indigenous housing projects. 

Early Bird registration of just $99+HST is available until the end of December. In the new year, registration for the conference will be $149 +HST. Delegates can find the Ottawa Wood Solutions Conference on Eventbrite or jump directly to online registration with this link: https://www.eventbrite.ca/e/2025-ottawa-wood-solutions-conference-tickets-1080654991169

A limited number of discounted passes are available for post-secondary educators and students in AEC+D programs of study. Please contact Kelsey Dayler for more information [email protected] 

Additional sources of information

Links on Durability of Wood Products

Content

On-Line Information on Wood Design and Durability Information On Treated Wood

Information On Termites and Other Pests Information on Mould / Mold

Other Web Sites of Interest Books On Wood Design

ON-LINE INFORMATION ON WOOD DESIGN AND DURABILITY

Canadian Wood Council

Ottawa, Ontario, Canada

The Canadian Wood Council (CWC) is the national association representing Canadian manufacturers of wood products used in construction. CWC participates in building codes and standards committees relating to structural performance, fire safety and durability to ensure proper use of wood products. Designers, builders and building officials address their questions on the design and use of wood products and building systems to CWC’s technical staff, and CWC publishes a large array of manuals, brochures and electronic tools to provide guidance and resource material.

 

Web site: https://cwc.ca/

Helpdesk: (800) 463-5091

General: (613) 747-5544

Offers: Design handbooks, software, seminars, fact sheets, links and help. Almost everything is available on-line; some books need to be ordered. Information generally aimed at architects and engineers.

 

Canada Mortgage and Housing Corporation

Ottawa, Ontario, Canada

As Canada’s national housing agency, provides a wide range of services including leading-edge research. CMHC is Canada’s largest publisher of housing information and has Canada’s most comprehensive selection of information about homes and housing.

 

Web site: http://www.cmhc-schl.gc.ca/en/index.cfm

General calls, in Canada: (800) 668-2642

General calls, from outside Canada: (613) 748-2003

Offers: Best practice guidelines and other publications. Information aimed at the general public as well as designers and builders. Publications must be ordered, either by phone or on-line. On the web site, go to “order desk” to browse catalog and/or purchase on-line. See sub-sections on Design and Construction, Renovation, Healthy Housing and Multi-unit Design for titles of interest. Recommended: “Best Practice Guide, Wood Frame Envelopes in the Coastal Climate of British Columbia” which will be found at Order Desk/Multi-unit Design. CMHC also publishes a two-volume set “Building Envelope Rehabilitation: Consultant Guide and Owner/Property Manager Guide” which provides help in assessing and fixing moisture-related damage in occupied buildings. CMHC’s web site additionally provides quite a bit of information on-line, in brief web pages – from the home page, go to “browse by topic” and click on “building, renovating and maintaining.”

 

University of Massachusetts, Building Materials and Wood Technology

Amherst, Massachusetts, USA

This web site for a university program primarily contains curriculum information, however click “publications” for plain-language information on many construction topics of general interest.

Web site: http://www.umass.edu/bmatwt/

Offers: Dozens of on-line articles aimed at the general public as well as designers and builders.

 

US Forest Products Laboratory

Madison, Wisconsin, USA

Established in 1910 by the U.S. Department of Agriculture Forest Service, the Forest Products Laboratory (FPL) serves the public as the U.S.’s leading wood research institute. FPL is recognized both nationally and internationally as an unbiased technical authority on wood science and use. Today, more than 250 scientists and support staff conduct research on expanded and diverse aspects of wood use. Research concentrates on pulp and paper products, housing and structural uses of wood, wood preservation, wood and fungi identification, and finishing and restoration of wood products.

Web site: http://www.fpl.fs.fed.us/

Phone: 608-231-9200

Offers: In addition to information about the research programs and technical research reports, the FPL web site also offers many on-line documents targeted for the general public. From the home page, click “FAQs” for access to the on-line (but somewhat technical) “Wood Handbook.” Click “Techlines” for a series of fact sheets that range from consumer-friendly to fairly technical. FPL is known as a source of information on wood finishes – click “Painting and Finishing Fact Sheets.” Almost all other FPL documents are also available on line. To find reports, papers or other documents, click “Search” (under Publications) on the home page and enter the topic of interest.

 

American Wood Council (AWC)

Washington, DC, USA

AWC is the wood products division of the American Forest & Paper Association (AF&PA). AWC’s mission is to increase the use of wood by assuring the broad regulatory acceptance of wood products, developing design tools and guidelines for wood construction, and influencing the development of public policies affecting the use of wood products.

Web site: http://www.awc.org/

Helpdesk: (202) 463-4713

General: (202) 463-2766

Offers: Has a very useful helpdesk for any questions regarding the use of wood and its products in building construction. Many publications are available online. Offer technical information regarding U.S. Codes and standards as well as a section on “Mold and Moisture in Homes.”

 

APA — The Engineered Wood Association

Tacoma, Washington, USA

A membership organization representing 75 percent of the structural wood panel products manufactured in North America, plus a host of engineered products that include glued laminated timber (glulam), composite panels, wood I-joists, and laminated veneer lumber. Very active in research and technology transfer.

Web site: http://www.apawood.org/

Tel: (253) 565-6600

Email: [email protected]

 

Offers: Hundreds of reports, fact sheets and other publications, generally geared for design and construction professionals. Many are available on-line; others can be purchased for a modest fee – search by topic area under “Publications.” Alternatively, browse the site by topic area for a wide range of information, on both specific engineered wood products (click “Products”) as well as general wood framing (click “Applications”). These topic-area pages are nicely cross-referenced to related publications. For specific durability-related information, click “Build a better home” in the left side menu. The web site also has FAQs and a “help desk.” Send questions by e-mail, or phone and ask for the help desk.

 

National Association of Home Builders Research Center

Upper Marlboro, Maryland, USA

Founded in 1964, the NAHB Research Center is a separately incorporated, wholly-owned, not-for-profit subsidiary of the U.S. National Association of Home Builders (NAHB), a membership organization of builders, manufacturers, and other housing industry professionals. Research spans a broad spectrum including design and construction of homes, land use, the environment, affordable and sustainable housing, and special needs housing. Technology transfer to builders and others is largely via “Toolbase,” a web site supplying information on building products, materials, new technologies, business management, and housing systems.

 

Web site: http://www.nahbrc.org/

Tel: (301) 249-4000

Toll Free in the US: (800) 638-8556

Toolbase help hotline: (800) 898-2842 (US only)

 

Offers: The Research Center web site offers 100 publication titles available for purchase, not available on- line. However, click on “Toolbase” and jump to a content-heavy web site with fact sheets, news and more all available on-line. Also has an “ask the expert” feature, by phone or e-mail.

 

Homeowner Protection Office

Vancouver, British Columbia, Canada

The Homeowner Protection Office (HPO) is a British Columbia Crown corporation formed in 1998 as a response to concerns about the quality of condominium construction in BC. Its purpose is to help strengthen consumer protection for buyers of new homes and improve the quality of residential construction in the province. The HPO is responsible for residential builder licensing, regulating mandatory third-party home warranty insurance, administering a no-interest repair loan program and tax relief grant for owners of leaky homes, and a research and education function designed to benefit the residential construction industry and consumers

Web site: http://www.hpo.bc.ca/

Tel: (800) 407-7757 (BC only)

Offers: This web site is full of on-line information specific to builder and consumer issues in BC. However, click on FAQs or Publications for access to several on-line documents of general interest to anyone involved in moisture-related damage repair.

 

National Research Council / Institute for Research in Construction (IRC)

Ottawa, Ontario, Canada

Established in 1947, IRC provides research, building code development, and materials evaluation services within Canada’s national laboratory. IRC’s Building Envelope and Structure program develops and applies technologies for design, construction and operation of durable, energy-efficient, and cost-effective building systems, in both new construction and repair or renovation, for all types of buildings. An interesting recent project is the Consortium for Moisture Management for Exterior Walls (MEWS), a research effort addressing some of the technical fundamentals behind moisture performance of building envelopes and funded by a partnership of industry groups. Results, when available, can be viewed on the web site.

 

Web site: http://www.nrc.ca/irc/bes/index.html

 

Offers: Click “publications” for access to a rich collection of on-line information, including nearly all of the famous (and not necessarily outdated) Canadian Building Digest articles published between 1960 and 1990. Also available on-line is IRC’s quarterly newsletter, staff articles from construction journals, and more. Some publications are abstracted only and can be ordered.

 

INFORMATION ON TREATED WOOD

American Wood Preservers’ Association

The American Wood-Preservers’ Association (AWPA) is an international, non-profit technical organization founded in 1904 to provide a common forum for the exchange of information for all segments of the wood preservation industry. AWPA provides standards development and a link for technical exchange between industry, researchers, and users of treated wood. As the principal standards writing organization for the wood treating industry in the United States, AWPA has significant influence internationally as well. AWPA Standards are written to insure that treated wood products perform satisfactorily for their intended uses. The Standards are recognized and used by customers worldwide, who purchase and use treated wood for applications in the building products, electrical, marine, railroad transportation, and road construction industries. The Standards, as well as technical papers contained in proceedings from annual meetings, are available for order through the web site, but may not be viewed on-line. However, there are several fact sheets and FAQs available on-line. Most of AWPA’s information is targeted to the wood treatment industry, but some material may be of interest to treated wood users.

 

Web site: http://www.awpa.com/

 

The Wood Preservation Science Council

Cambridge, Massachusetts, USA

Web site provides a thorough collection of on-line research documents (prepared by a variety of agencies) on the subject of health and environmental impacts of CCA-treated wood.

 

Web site: http://www.woodpreservativescience.org/facts.shtml

 

Wood Preservation Canada

Ottawa, Ontario, Canada

Wood Preservation Canada is a non-profit industry association comprising members from across Canada. Operating under a Federal Charter, the Institute serves as a forum for those involved with the wood preservation industry, from research to production, marketing and protection of the environment. WPC members cooperate with government departments and other agencies in preparing standards for the industry, and in developing guidelines for the design and operation of wood preservation facilities. It works with Canadian university testing laboratories, faculties and independent research organizations concerned with the development of treated wood. The web site offers many on-line fact sheets and FAQs targeted at users of treated wood. Also available on-line is a table of CSA O80 standards by commodity.

 

Web site: http://www.woodpreservation.ca/

 

International Research Group on Wood Preservation

The International Research Group on Wood Preservation (IRG) was launched as an independent research group in January 1969, with the Secretariat currently located in Sweden. Today the Group has more than 300 members from 49 countries around the world. IRG provides a forum and networking system for wood preservation researchers, publishes more than 100 documents every year, arranges conferences and so forth. The web site does not offer any publications on line, however titles can be browsed and ordered through the site. Information offered is highly technical.

 

Web site: http://www.irg-wp.com/

 

Western Wood Preservers Institute

Vancouver, Washington, USA

Established in 1950 and representing the interest of the pressure treating wood products industry throughout western North America, WWPI provides a range of information on its web site for users of treated wood.

 

Web site: http://www.wwpinstitute.org/

 

INFORMATION ON TERMITES AND OTHER PESTS

 

Louisiana State University Agricultural Center

Web site: http://www.lsuagcenter.com/en/environment/insects/Termites/

 

University of Toronto, Urban Entomology Group

Web site offers information on biology and control of termites

Web site: http://www.utoronto.ca/forest/termite/termite.htm

 

University of Hawaii

Web site: www2.ctahr.hawaii.edu/oc/freepubs/index.asp

Click on “Household and Structural Pests” for fact sheets on termites and on termite barrier technologies.

 

University of Nebraska, Lincoln

Web site: http://www.ianr.unl.edu/ Search for “termite”.

 

Australian Pest Controllers Association

Web site: http://www.termite.com/

Very thorough information for builders and homeowners – useful outside Australia as well.

 

Further reading (termites):

Possibly the most comprehensive guidance on termite control is provided by two Australian standards:

  • Australian Standard AS 3660.1-1995 Protection of buildings from subterranean termites. Part 1 New buildings. Standards Australia, Homebush,
  • Australian Standard AS 3660-1993- Protection of buildings from subterranean termites. – Prevention, detection and treatment of Standards Australia, Homebush, NSW.
  • You can purchase (but not view) these documents at this web site: http://www.standards.com.au/ – type “termite” in the search

 

INFORMATION ON MOLD

Mold, Housing and Wood

Written by an industrial hygienist and a wood mycologist in 2002. This 15-page paper is clear and well- referenced. Available on-line: http://www.wwpa.org/lumberandmold.htm 

The Condominium Home Owners Guide to Mold

A small booklet published by Canada Mortgage and Housing Corporation, providing useful and simple tips on prevention and cleanup. Available by phone – see CMHC listing at top of page.

Clean-up Procedures for Mold in Houses

Booklet published in 1993 by Canada Mortgage and Housing Corporation. Available from CMHC web site (Order Desk/Healthy Housing). See CMHC listing at top of page.

Mold in Housing: An Information Kit for First Nations Communities

Authored by Canada Mortgage and Housing Corporation, Health Canada and Indian and Northern Affairs Canada. Useful for anyone, not just First Nations/Native Americans. Addresses what to do about mold, in layperson’s language. Available only by phone from CMHC – see listing at top of page.

Fungal Contamination in Public Buildings: A Guide to Recognition and Management

Published by Health Canada in 1995, this 88-page, thorough and scientific report provides a protocol for investigating buildings with suspected fungal problems affecting human health. Available on-line at http://www.hc-sc.gc.ca/ewh-semt/alt_formats/hecs-sesc/pdf/pubs/air/fungal-fongique/fungal-fongique_e.pdf

Guidelines on Assessment and Remediation of Fungi in Indoor Environments Published in 2000 by the New York City Department of Health, Bureau of Environmental and Occupational Disease Epidemiology. Covers health issues and provides a protocol for assessment and remediation. Similar in scientific approach to the Health Canada document, however much shorter. Available on-line at http://home2.nyc.gov/html/doh/html/epi/moldrpt1.shtml

Moulds: Isolation, Cultivation, Identification

An on-line book, 1997, by David Malloch, Department of Botany, University of Toronto:

http://www.botany.utoronto.ca/ResearchLabs/MallochLab/Malloch/Moulds/Moulds.html

 

Mold Resources

The United States Environmental Protection Agency web site has comprehensive on-line information and many links on molds, cleanup and health: http://www.epa.gov/iaq/molds/index.html

Report of the Microbial Growth Task Force

Published by the American Industrial Hygiene Association, 66 pages, 2001, covers procedures for remediation of molds in buildings. Available on-line at: http://www.aiha.org/content/accessinfo/consumer/factsaboutmold.htm

 

OTHER WEB SITES OF INTEREST

University of Waterloo, Building Engineering Group

Waterloo, Ontario, Canada

The Building Engineering Group (BEG) is a multi-disciplinary group which undertakes research, development and demonstration (R,D & D) for the building industry. BEG is a non-profit, non-proprietary organization operating within the Civil Engineering Department. Operates an outdoor test facility for assessment of building envelope performance, the BEG hut.

Web site: http://www.civil.uwaterloo.ca/beg

Centre for Building Studies, Concordia University

Montreal, Quebec, Canada

The Centre is a research group within the Department of Building, Civil & Environmental Engineering. Research areas include building envelope performance, indoor environment, wind effects and more. The Centre has many advanced facilities for research – click on “Laboratories” to learn more.

Web site: http://www.bcee.concordia.ca/index.php/Centre_for_Building_Studiesindex.htm

National Building Envelope Council

Ottawa, Ontario, Canada

A forum for Canadian design professionals to share information and jointly pursue excellence in design, construction and performance of envelopes. Arranges annual conferences. Local chapters offer regular meetings, lectures, newsletters and so forth – click “Regional BECs”

Web site: http://www.nbec.net/

 

BOOKS ON WOOD DESIGN

Best Practice Guide, Wood Frame Envelopes in the Coastal Climate of British Columbia. Canada Mortgage and Housing Corporation, 1998. 211p, detailed drawings and 3D PowerPoint files. This is a comprehensive design guide. Also includes some background information on wood decay. Available from CMHC – see listing at top of page.

Building Envelope Rehabilitation: Consultant Guide and Owner/Property Manager Guide. Canada Mortgage and Housing Corporation, 2001. A two-volume set providing help in assessment and remediation of moisture-related damage in occupied buildings. Available from CMHC – see listing at top of page.

Builder’s Guides. J. Lstiburek, 1997, Building Science Corporation, Westford, MA, 303p. http://www.buildingscience.com/, 978-589-5100. Comprehensive guides available in four versions (one each addressing four different climate zones that cover all of North America) with detailed drawings covering design principles, foundations, framing, HVAC, plumbing, electrical, drywall and painting. Building science translated for the builder.

CSA S478-95 Guideline on Durability in Buildings. 1995, 93p, Canadian Standards Association, Etobicoke, ON. Advice on incorporating requirements for durability into the design, operation and maintenance provisions for buildings and their components. Overview of deterioration agents and life expectancies for various components.

Design of Wood Structures for Permanence. Anon., 1988, 17p, American Forest and Paper Association, Washington, DC. A very brief overview of general recommendations on good construction practice.

Available through the web site of the American Wood Council (see above, under “wood design and durability”).

Evaluation, Maintenance and Upgrading of Wood Structures, A guide and Commentary. Subcommittee of American Society of Civil Engineers, 1982, 428p, American Society of Civil Engineers, New York, NY. A somewhat dated guide to the technical aspects of inspection, evaluation, reinforcement, repair and rehabilitation of timber structures. Application of lessons learned to design and maintenance of new structures.

Guide to the Inspection of Existing Homes for Wood-Inhabiting Fungi and Insects. M.P. Levy, 1979, 104p, US Department of Housing and Urban Development. A well illustrated booklet which would be invaluable to anyone inspecting buildings for decay. Not as comprehensive as the BRE publication (see “Recognizing Wood Rot ” below), but more relevant to North American conditions.

Introduction to Wood Building Technology. Canadian Wood Council, 1997, 430p, Ottawa, ON. A technical book on wood-frame construction, it covers materials and properties, thermal insulation, fire protection, construction details, sound control and inspection and repair. Available from CWC – see listing at top of page.

Moisture Control Handbook: New low-rise, Residential Construction. J. Lstiburek and J. Carmody, 1991, 247p, US Department of Commerce, National Technical Information Service, Springfield VA. A guide for heating, cooling and mixed climates. How walls get wet through vapour diffusion, air leakage, condensation, and water leakage. Moisture control strategies. Building science explained.

National Building Code of Canada. National Research Council, 1995, 571p, Ottawa, ON. Minimum requirements to satisfy consumer health, safety and accessibility requirements of buildings. Protection of property is not considered a root objective of the building code consequently references to durability requirements are extremely limited. Very little guidance on how to implement the requirements of the code in terms of moisture control, compared to for example, fire control.

Recognising Wood Rot and Insect Damage in Buildings. A.F. Bravery, R.W. Berry, J.K. Carey and D.E. Cooper, Building Research Establishment, Garston, UK, 1992, 120p. A comprehensive and well-illustrated guide to distinguishing different types of wood-destroying organisms. More relevant to the UK and European building practice and organisms than to North America. Available at http://web.archive.org/web/20051104025920/http://www.bre.co.uk/ (click “bookshop”).

Selection and Use of Preservative Treated Wood. D.L. Cassens, W.C. Feist, B.R. Johnson and R.C. DeGroot, 1995, Forest Products Society, Madison, WI. An excellent guidebook for those contemplating using treated wood in a project.

Wood as a Building Material. W. Wilcox, E. Botsai, and H. Kubler, John Wiley & Sons Inc., 1991. 215 p, index, bibliography, many illustrations. Clear and concise, intended to be readable by building designers. Covers the properties and structure of wood, the relationship between wood and water, wood products, thermal properties, fire performance, decay and its prevention, wood finishing, design guidelines and wood identification.

Wood Protection Guidelines: Protecting Wood From Decay Fungi and Termites. Anon., 1993, Wood Protection Council, National Institute of Building Sciences. A very useful guidebook on controlling the conditions that favour attack by wood-destroying organisms.

Wood Reference Handbook, A Guide to the Architectural Use of Wood in Building Construction. Canadian Wood Council, 2000, 562p, Ottawa, ON. A wealth of basic information on wood characteristics, wood product properties, connections, structural wood systems, building completion, wood finishes, and fire safety. Minimal information on preservative treatment compared to fire control. Available from the Canadian Wood Council – see listing at top of page.

Finishes for Exterior Wood. R. Williams, U.S. Forest Products Laboratory, 1996. Excellent booklet available at low cost, by phone only – see the FPL listing near top of page. Also see FPL web site for on-line fact sheets on finishes.

CodeCHEK

 

 

 

Welcome to CodeCHEK, a tool for checking conformance to Canadian building codes.

CodeCHEK was developed under the Wood Works! Program by the Canadian Wood Council, with funding support from Forestry Innovation Investment, to assist designers to determine if and when lightweight wood-frame, heavy timber, mass timber and/or encapsulated mass timber construction can be used, and to determine what are the applicable construction requirements related to fire safety.

If the evaluation results show that lightweight wood-frame, heavy timber and/or encapsulated mass timber construction is permitted, the least restrictive requirements and applicable code reference(s) are displayed on the screen. Additional options with more restrictive requirements permitting lightweight wood-frame, heavy timber and/or encapsulated mass timber construction are accessible via the Code Articles button on the evaluation screen.

If the evaluation determines that lightweight wood-frame, heavy timber and/or encapsulated mass timber construction is not permitted under a particular building code’s acceptable solutions with the user’s input choices, information is provided regarding:

  • possible changes that can be made to the project characteristics that may permit the building to be of some form of wood construction;
  • references that may be of assistance in the development of an alternative solution; and,
  • the wood elements permitted in a building required to be of noncombustible construction.

Durability Guidelines

Wood structures, properly designed and properly treated, will last indefinitely. This section includes guidance on specific applications of structures that have constant exposure to the elements.

Mass timber exteriors

Modern Mass Timber Construction includes building systems otherwise known as post-and-beam, or heavy-timber, and cross laminated timber (CLT). Typical components include solid sawn timbers, glue-laminated timbers (glulam), parallel strand lumber (PSL) laminated veneer lumber (LVL) laminated strand (LSL), and CLT. Heavy-timber post and beam with infill walls of various materials is one of the oldest construction systems known to man. Historic examples still standing range from Europe through Asia to the long-houses of the Pacific Coastal first nations (Figure 1). Ancient temples in Japan and China dating back thousands of years are basically heavy timber construction with some components semi-exposed to the weather (Figure 2). Heavy-timber-frame warehouses with masonry walls dating back 100 years or more are still serviceable and sought-after as residences or office buildings in cities like Toronto, Montreal and Vancouver (Koo 2013). Besides their historic value, these old warehouses offer visually impressive wood structures, open plan floors and resultant flexibility of use and repurposing. Building on this legacy, modern mass timber construction is becoming increasingly popular in parts of Canada and the USA for non-residential construction, recreational properties and even multi-unit residential buildings. Owners and architects typically see a need to express these structural materials, particularly glulam, on the exterior of the building where they are at semi-exposed to the elements (Figure 3). In addition wood components are being increasingly used to soften the exterior look of non-wood buildings and make them more appealing (Figure 4). They are anticipated to remain structurally sound and visually appealing for the service life. However, putting wood outside creates a risk of deterioration that needs to be managed. Similar to wood used for landscaping, the major challenges to wood in these situations are decay, weathering and black-stain fungi. This document provides assistance to architects and specifiers in making the right decisions to maximize the durability and minimize maintenance requirements for glulam and other mass timber on the outside of residential and non-residential buildings. It focusses on general principles, rather than providing detailed recommendations. This is primarily focussed on a Canadian and secondarily on a North American audience.

Click here to read more

Disaster Relief Housing

Shelter needs after natural disasters come in three phases:

  1. Immediate shelter: normally supplied by tarpaulins or light tents
  2. Transition shelter: may be heavy-duty tents or more robust medium-term shelters.
  3. Permanent buildings: Ultimately permanent shelters need to be constructed when the local economy recovers.

Immediate and transition shelters are typically supplied by aid agencies. Light wood frame is ideal for rapid provision of medium- to long-term shelter after natural disasters. However, there are challenges in certain climates for wood frame construction that must be addressed in order to sustainably and responsibly build them. For example, many of the regions which experience hurricanes, earthquakes and tsunamis also have severe decay and termite hazards including aggressive Coptotermes species and drywood termites. In extreme northern climates, high occupancy loads are common and when combined with the need for substantial thermal insulation to ensure comfortable indoor temperatures, can result in condensation and mould growth if wall and roof systems are not carefully designed.

The desire of aid organizations to maximize the number of shelters delivered tends to drive down the allowable cost dictating simplified designs with fewer moisture management features. It may also be difficult to control the quality of construction in some regions. Once built, “temporary” structures are commonly used for much longer than their design life. Occupier improvements over the longer term can potentially increase moisture and termite problems. All of these factors mean that the wood used needs to be durable.

One method of achieving more durable wood products is by treating the wood to prevent decay and insect/termite attack. However, commonly available preservative treated wood in Canada may not be suitable for use in other countries. Selection of the preservative and treatment process must take into account the regulations in both the exporting and receiving countries, including consideration of the potential for human contact with the preserved wood, where the product will be within the building design, the treatability of wood species, and the local decay and termite hazard. Simple design features, such as ensuring wood does not come into contact with the ground and is protected from rain, can reduce moisture and termite problems.

Building with concrete and steel does not eliminate termite problems. Termites will happily forage in a concrete or masonry block buildings looking for wood components, furniture, cupboards, and other cellulosic materials, such as the paper on drywall, cardboard boxes, books etc. Mud tubes running 10ft over concrete foundations to reach cellulosic building materials have been documented. Indeed, termites have caused major economic damage to cellulosic building materials even in concrete and steel high-rises in Florida and in southern China.

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Timber bridges

Timber bridges are an excellent way to showcase the strength and durability of wood structures, even under harsh conditions, when material selection, design, construction and maintenance are done well. They could also be critical infrastructure elements that span fast rivers or deep gorges. Consequences of failure of these structures can be severe in loss of life and loss of access to communities. Durability is as critical as engineering to ensure safe use of timber bridges for the design life, typically 75 years in North America.

There are numerous examples of old wood bridges still in service in North America (Figure 1). The oldest are traditional covered bridges (Figure 2), three of which are around 190 years old. In Southeast China, Fujian and Zhejiang provinces have numerous covered bridges that are almost 1000 years old (Figure 3). The fact that these bridges are still standing is a testament to the craftsmen that selected the materials, designed the structures, built them, monitored their condition and kept them maintained and repaired. They would have selected the most durable wood species available, likely Chestnut or cedars in North America, china fir (china cedar) in southeast China. They would have adzed off the thin perishable sapwood exposing only the naturally durable heartwood. The fact the covered bridges around today all look similar is because those were the tried and tested designs that worked. They clearly designed those bridges to shed water with a wood shingle roof, vertical siding projecting below the deck and structural elements sheltered from all but the worst wind-driven rain. Any rain that did not drip off the bottom of the vertical siding and wicked up the end grain would also dry out reasonably rapidly. Slow decay that did occur at the bottom of these boards was inconsequential because it was remote from connections to structural elements. Construction must have been meticulously performed by experienced craftsmen. Those craftsmen may well have been locals that would continue to monitor the bridge over its life and make any repairs necessary. Of course, not every component in those ancient bridges is original, particularly shingle roofs that typically last 20-30 years depending on climate. These bridges have all been repaired due to decay and in some cases dismantled and re-built over the years for various reasons (e.g., due to changes in traffic loads, arson, flooding, fire, hurricanes, etc.). The Wan’an Bridge in Fujian is known to have been built in 1090, refaced in 1708 and rebuilt in 1845, 1932 and 1953. The apparently increasing frequency of rebuilding may suggest a loss of knowledge and skills, but all repairs and reconstruction prior to 1845 may not have been recorded.

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Permanent Wood Foundations

A permanent wood foundation (PWF) is a strong, durable and proven construction method that has a number of unique advantages over other foundation systems for both the builder and the homeowner. The first Canadian examples were built as early as 1950 and are still being used today. PWFs can also be designed for projects such as crawl spaces, room additions and knee-wall foundations for garages and mobile homes. Concrete slab-on-grade, wood sleeper floors and suspended wood floors can all be used with PWFs.

A permanent wood foundation is an in-ground engineered construction system designed to turn a home’s foundation into useable living space. A below-grade stud wall constructed of preservative treated plywood and lumber supports the structure and encloses the living space. PWFs are suitable for all types of light-frame construction covered under Part 9 (Housing and Small Buildings) of the National Building Code of Canada, under clauses 9.15.2.4.(1) and 9.16.5.1.(1). This includes single-family detached houses, townhouses, low-rise apartments, and institutional and commercial buildings. In addition, the recently revised CSA S406 standard, Specification of permanent wood foundations for housing and small buildings, allows for three-storey construction supported by PWF.

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Wood’s Durable Heritage

There’s no reason a wood structure can’t last virtually forever – or, at least hundreds of years, far longer than we may actually need the building. With a good understanding of how to protect wood from decay and fire, we can expect today’s wood buildings to be around for as long as we wish.

While wood does not have the historical longevity of stone, there nonetheless remain standing some very old wood buildings. In Europe, wood was long a dominant building material dating back to the beginning of civilisation. Most of these ancient buildings are long gone, lost to fire, decay, or deconstruction for another purpose. In the early days of wood construction, the primary structural components were placed directly in the ground, which eventually leads to decay. It was not until sometime in the 1100s that builders began to use stone footings – thus our still-standing examples of wood buildings generally date from no earlier than that time.

Perhaps the most famous ancient European wood buildings still in evidence today are the Norwegian stave churches, hundreds of which were built in the 12th and 13th centuries and of which 25-30 still remain today. Their exterior claddings have typically been replaced, but the structural wood is original.

The Urnes stave church (c. 1150) in Sogn og Fjordane County is Norway’s oldest. Photo source

 

 

 

 

 

 

 

In North America, the abundance of wood and the existing timber skills of early settlers led to widespread use of wood – wood has always been and still is the primary structural material for small buildings here. The oldest surviving wood homes in the US date to the early 1600s. Nearly 80 homes remain from this era in the New England states.

The Fairbanks House (c. 1636) in Dedham, Massachusetts, USA, is the oldest surviving timber frame house in North America. It was built for Jonathan and Grace Fairebanke and was occupied by them and seven succeeding generations of the family until the early twentieth century. The Fairbanks family still owns the property. The house is open as a museum. Photo source.

 

 

 

 

 

 

 

Many other North American wood buildings survive from the 18th century. Even in the demanding climate of Louisiana, where hot and humid conditions present a challenge for wood durability, one can still find some of the original French settlements dating to the first half of the 1700s. And of course, there are countless standing wood buildings from the 1800s and early 1900s, most of which are probably still occupied.

The Parlange Plantation (c. 1750) in Pointe Coupée Parish, Louisiana, USA, was built by the Marquis Vincent de Ternant and remains in the possession of his descendants, the Parlange family. This large plantation home was constructed of bousilliage (mud, moss and deer hair) and cypress wood set over a hand-made brick raised basement. Photo source.

 

 

 

 

 

 

 

Japan has a well-known history of wood use and is the home of the oldest surviving wood structure in the world, a Buddhist temple near the ancient capital city of Nara. The Horyu-ji temple is believed to have been built at the beginning of the eighth century (c. 711) and possibly even earlier, as one of the hinoki (Japanese cypress) posts appears to have been felled in the year 594. This temple’s longevity is largely helped by careful maintenance and repair. This entire region of Japan has many other ancient wood buildings still standing.

 

The Horyu-ji temple at Nara

 

 

 

 

 

 

 

For modern buildings, we don’t normally require such exceptional longevity. The life of a typical North American house is no more than 100 years (the average is lower), and our non-residential buildings are usually demolished in 50 years or less. Wood is perfectly suitable for these lifetime expectations. Click here for survey data showing that wood buildings last as long, or longer than buildings made of other materials.

Reference:
Architecture in Wood: A History of Wood Building and Its Techniques in Europe and North America. Hans Jrgen Hansen, Ed., Faber and Faber, London, 1971..

Case Studies

1865 House, Vancouver BC

 

 

 

 

Irving House is a large, one and one-half storey plus basement wood-frame residence, designed in the Gothic Revival style, located on its original site at the corner of Royal Avenue and Merivale Street in the New Westminster neighbourhood of Albert Crescent. Irving House is remarkable for the extent to which its original exterior and interior elements have been maintained. Operated as an historic house museum, it also includes a collection of many original furnishings from the Irving family.

Irving House
Location 302 Royal Avenue, New Westminster, B.C.
Completion of Construction 1865
Other Information Original owner – Captain William and Elizabeth Jane Irving
Current Status Heritage of New Westminster
Construction Method Platform-Frame
Style Gothic Revival style
Framing 2-inch Douglas Fir lumber
Cladding Wide lapped Redwood weatherboard siding and wooden trim
Comdition No signs of decay on any framing members
Major Repair 1880

By courtesy of New Westminster Museum and Archives, New Westminster, British Columbia

Other link: http://www.flickr.com/photos/bobkh/297751638/in/set-72157594340707368/

1912 House, Vancouver BC

 

 

 

 

This classic turn-of-the-century home was slated for demolition in 1990. It was already stripped back to the bare framing when it was purchased by a new owner who wished to convert it into apartments. At the new owner’s request, the building was inspected by Dr. Paul Morris of Forintek in 1991 for signs of deterioration. After 80 years in service there were no signs of decay on any of the framing members nor the window frames, most of which were original.

1912 House
Location Vancouver
Date of Construction 1912 (estimated)
Original Records Water service 1909
On City File 1915
Other Information Original owner – Henry B. Ford
Current Status Vancouver Heritage Resource Inventory
Construction Method Platform-Frame
Style Heritage, with multiple pitched roofs & wide overhangs
Framing Rough green full 2-inch Douglas Fir lumber
Sheathing Rough green Douglas Fir boards
Building Paper Asphalt-impregnated paper
Cladding Western Red Cedar shakes
Western Red Cedar siding
Roofing Western Red Cedar shakes (new in 1991)
Condition No signs of decay on any framing members

Temple at Nara, Japan

The Horyuji Buddhist temple at Nara is probably the oldest wooden structure in the world. Nara became the first permanent capital of Japan in 710.

 

 

 

 

 

Horyuji Buddhist temple at Nara
Location Nara, Japan
Date of Construction 670 – 714 (Estimated)
Original Records Built on site of original temple from 607
Other Information Original owner – Prince Shotoku
Current Status World Cultural Heritage Building
Construction Method Heavy Timber
Style 2-inch Douglas-fir lumber
Framing Hinoki (Durable – Japanese cypress)
Roofing Multi-tiered roof with Clay tile
Condition No signs of decay on any framing members
Maintenance Schedule Major repairs every 100 years, rebuilt every 300 years

Tall Wood Buildings – Research

Studies

Reports

Fire Research

Acoustics Research and Guides

Tall Wood Building Demonstration Initiative Test Reports
(funding provided by Natural Resources Canada)

Visit Think Wood’s Research Library for additional resources

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Mid-Rise Buildings – Research

Studies

General

Structural & Seismic

Vertical Movement in Wood Platform Frame Structures (CWC Fact Sheets)

Design of multi-storey wood-based shearwalls: Linear dynamic analysis & mechanics based approach

Fire

Testing

Fire Research

Research for Wood and Wood-Hybrid Mid-Rise Buildings Project
National Research Council Canada (2011-2015)

Other Reports

Acoustics Research

Research for Wood and Wood-Hybrid Mid-Rise Buildings Project
National Research Council Canada (2011-2015)

Other Reports & Guides

Building Envelope Research

Research for Wood and Wood-Hybrid Mid-Rise Buildings Project
National Research Council Canada (2011-2015)

Visit Think Wood’s Research Library for additional resources

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Supplemental Treatment

Supplementary treatment may be added wherever on-site cutting or drilling of wood is unavoidable, or where it is suspected the original protection measures may be inadequate. This is most commonly done in applications such as wood foundations, agricultural buildings, or non-residential long-life applications such as utility poles and bridge timbers.

For wood foundations and agricultural buildings, it is normal to expect some end cutting and boring for bolts, pipes or electrical wiring. Typically copper naphthenate is brushed on the cut ends or holes in the treated wood to protect the exposed surfaces. Experience has shown that this is adequate for the limited exposure resulting from such cases.

For cases such as poles or bridge timbers, the original preservative protection can be lost over time due to degradation or depletion of the active ingredients. A need for supplementary treatment may be indicated by damage to similar structures in the same area. Or there may be evidence that the risk of damage has increased, for example, if new termites move into the area.

In cases like utility poles, where these are part of the physical infrastructure of an organization, inspection, maintenance and remediation are regularly practiced to ensure continued safety in use and to schedule replacement. Often the cost of supplementary treatment is relatively small compared to the cost of inspection, and is a very small fraction of the cost of premature failure. Supplementary treatment may also be prudent in terms of due diligence (reducing legal liability). During inspection of these structures, drills or increment borers may be used to determine the condition of the interior of the wood members. It is advised to treat these holes, to avoid infection from non-sterilized drills and borers. In addition, as holes are typically drilled where decay is suspected or anticipated, treating the holes is wise to supplement protection at that site.

Solids

Borate, copper/borate and fluoride rods have seen increasingly widespread use as supplementary treatments for internal decay due to their convenience in handling and very low toxicity. Copper moves more slowly in the wood than borate, providing protection to the zone around the rod if the borate is removed over time through mass flow of water. This is mainly of concern for utility poles in wet climates, where moisture moves into the pole from the soil, wicks up the pole and evaporates above ground, moving the borate up the pole with it – this leaves the borate in a part of the pole not especially at risk for decay. The rate of water flow may be relatively slow in Douglas fir (an impermeable wood species) treated with an oil-borne preservative having some water repellency. It may be more rapid in southern pine (a very permeable wood species) treated with a waterborne preservative.

Liquids, Pastes and Gels

Spray and foam application of liquids and gels are increasingly used for supplementary treatment of wood frame buildings against termites and wood boring beetles. Holes are drilled into each stud space and the liquids or gels are pumped in under pressure. Coverage cannot be expected to be as effective as that achieved by spray treatment during construction. Liquids can be poured or pumped into drilled holes to treat internal decay in utility poles or timbers. Typically the loading of preservative that can be achieved is limited in the first case by the size and location of the holes and the solubility of the chemical, and in the second case by the permeability of the wood. Another approach is to leave a pressurized device attached to the pole below ground, which pushes a larger amount of liquid into the pole over a longer time period. Care must be taken to ensure that drilled holes do not intersect voids or checks leading to the surface of the wood; otherwise, the liquids can flow out. Pastes can be packed into drilled holes to treat internal decay. Alternatively, they can be brushed or trowelled on or applied on bandages to treat external decay.

Fumigants

Fumigant treatments have been used successfully for decades on utility poles and timber structures. The gas moves rapidly through the wood, adsorbing to the lignocellulose and providing several years of residual protection.

Tall Wood Buildings

A tall wood building is a building over six-storeys in height (top floor is higher than 18 m above grade) that utilizes mass timber elements as a functional component of its structural support system. With advanced construction technologies and modern mass timber products such as glued-laminated timber (glulam), cross-laminated timber (CLT) and structural composite lumber (SCL), building tall with wood is not only achievable but already underway – with completed contemporary buildings in Canada, US, Australia, Austria, Switzerland, Germany, Norway, Sweden, Italy and the United Kingdom at seven-storeys and taller.

Tall wood buildings incorporate modern fire suppression and protection systems, along with new technologies for acoustic and thermal performance. Tall wood buildings are commonly employed for residential, commercial and institutional occupancies.

Mass timber offers advantages such as improved dimensional stability and better fire performance during construction and occupancy. These new products are also prefabricated and offer tremendous opportunities to improve the speed of erection and quality of construction.

Some significant advantages of tall wood buildings include:

  • the ability to build higher in areas of poor soils, as the super structure and foundations are lighter compared to other building materials;
  • quieter to build on site, which means neighbours are less likely to complain and workers are not exposed to high levels of noise;
  • worker safety during construction can be improved with the ability to work off large mass timber floor plates;
  • prefabricated components manufactured to tight tolerances can reduce the duration of construction;
  • tight tolerances in the building structure and building envelope coupled with energy modelling can produce buildings with high operational energy performance, increased air tightness, better indoor air quality and improved human comfort

Design criteria for tall wood buildings that should be considered include: an integrated design, approvals and construction strategy, differential shrinkage between dissimilar materials, acoustic performance, behaviour under wind and seismic loads, fire performance (e.g., encapsulating the mass timber elements using gypsum), durability, and construction sequencing to reduce the exposure of wood to the elements.

It is important to ensure early involvement by a mass timber supplier that can provide design assistance services that can further reduce manufacturing costs through the optimization of the entire building system and not just individual elements. Even small contributions, in connection designs for example, can make a difference to the speed of erection and overall cost. In addition, mechanical and electrical trades should be invited in a design-assist role at the outset of the project. This allows for a more complete virtual model, additional prefabrication opportunities and quicker installation.

Recent case studies of modern tall wood buildings in Canada and around the world showcase the fact that wood is a viable solution for attaining a safe, cost-effective and high-performance tall building.

For more information, refer to the following case studies and references:

Brock Commons Tall Wood House (Canadian Wood Council)

Origine Point-aux-Lievres Ecocondos,Quebec City (Cecobois)

Wood Innovation and Design Centre (Canadian Wood Council)

Technical Guide for the Design and Construction of Tall Wood Buildings in Canada (FPInnovations)

Ontario’s Tall Wood Building Reference (Ministry of Natural Resources and Forestry & Ministry of Municipal Affairs)

Summary Report: Survey of International Tall Wood Buildings (Forestry Innovation Investment & Binational Softwood Lumber Council)

www.thinkwood.com/building-better/taller-buildings

Framing Connectors

Framing connectors are proprietary products and include fastener types such as; framing anchors, framing angles, joist, purling and beam hangers, truss plates, post caps, post anchors, sill plate anchors, steel straps and nail-on steel plates. Framing connectors are often used for different reasons, such as; their ability to provide connections within prefabricated light-frame wood trusses, their ability to resist wind uplift and seismic loads, their ability to reduce the overall depth of a floor or roof assembly, or their ability to resist higher loads than traditional nailed connections. Examples of some common framing connectors are shown in Figure 5.6, below.

Framing connectors are made of sheet metal and are manufactured with pre-punched holes to accept nails. Standard framing connectors are commonly manufactured using 20- or 18-gauge zinc coated sheet steel. Medium and heavy-duty framing connectors can be made from heavier zinc-coated steel, usually 12-gauge and 7-gauge, respectively. The load transfer capacity of framing connectors is related to the thickness of the sheet metal as well as the number of nails used to fasten the framing connector to the wood member.

Framing connectors are suitable for most connection geometries that use dimensional lumber that is 38 mm (2″ nom.) and thicker lumber. In light-frame wood construction, framing connectors are commonly used in connections between joists and headers; rafters and plates or ridges; purlins and trusses; and studs and sill plates. Certain types of framing connectors, manufactured to fit larger wood members and carry higher loads, are also suitable for mass timber and post and beam construction.

Manufacturers of the framing connectors will specify the type and number of fasteners, along with the installation procedures that are required in order to achieve the tabulated resistance(s) of the connection. The Canadian Construction Materials Centre (CCMC), Institute for Research in Construction (IRC), produce evaluation reports that document resistance values of framing connectors, which are derived from testing results.

 

Figure 5.6 Framing Connectors

 

For more information, refer to the following resources:

Canadian Construction Material Centre, National Research Council of Canada

Truss Plate Institute of Canada

CSA S347 Method of Test for Evaluation of Truss Plates used in Lumber Joints

ASTM D1761 Standard Test Methods for Mechanical Fasteners in Wood

Canadian Wood Truss Association

Mass Timber

Advancements in wood product technology and systems are driving the momentum for innovative buildings in Canada. Products such as cross-laminated timber (CLT), nailed-laminated timber (NLT), glued-laminated timber (GLT), laminated strand lumber (LSL), laminated veneer lumber (LVL) and other large-dimensioned structural composite lumber (SCL) products are part of a bigger classification known as ‘mass timber’.

Although mass timber is an emerging term, traditional post-and-beam (timber frame) construction has been around for centuries. Today, mass timber products can be formed by mechanically fastening and/or bonding with adhesive smaller wood components such as dimension lumber or wood veneers, strands or fibres to form large pre-fabricated wood elements used as beams, columns, arches, walls, floors and roofs. Mass timber products have sufficient volume and cross-sectional dimensions to offer significant benefits in terms of fire, acoustics and structural performance, in addition to providing construction efficiency.

Cross-Laminated Timber (CLT)

Cross-laminated timber (CLT) is a proprietary engineered wood product that is prefabricated using several layers of kiln-dried lumber, laid flat-wise, and glued together on their wide faces. Panels typically consist of three, five, seven or nine alternating layers of dimension lumber. The alternating directions of the CLT laminations provide it with high dimensional stability. CLT also has a high strength to weight ratio, along with exhibiting advantages for structural, fire, thermal and acoustic performance.

Panel thicknesses usually range between 100 to 300 mm (4 to 12 in), but panels as thick as 500 mm (20 in) can be produced. Panel sizes range from 1.2 to 3 m (4 to 10 ft) in width and 5 to 19.5 m (16 to 64 ft) in length. The maximum panel size is limited by the size of the manufacturer’s press and transportation regulations.

The design provisions for CLT in Canada apply to sawn lumber panels manufactured in accordance with the ANSI/APA PRG 320 standard. Typically, all the laminations in one direction are manufactured using the same grade and species of lumber. However, adjacent layers are permitted to be of different thickness and made of alternative grades or species. The moisture content of the lumber laminations at the time of CLT manufacturing is between 9 and 15%.

There are five primary CLT stress grades; E1, E2, E3, V1 and V2. Stress grade E1 is the most readily available stress grade. The “E” designation indicates machine stress rated (MSR, or E-rated) lumber and the “V” designation indicates visually graded lumber. Stress grades E1, E2 and E3 consist of MSR lumber in all longitudinal layers and visually graded lumber in the transverse layers, while stress grades V1 and V2 consist of visually graded lumber in both longitudinal and transverse layers. Properties for custom CLT stress grades are also published by individual manufacturers. Similar to other proprietary structural wood products, CLT can be evaluated by the Canadian Construction Materials Centre (CCMC) in order to produce a product evaluation report.

Unlike primary and custom CLT stress grades which are associated with structural capacity, appearance grades refer to the surface finish of CLT panels. Any stress grade can usually be produced in any surface finish targeted by the designer. Accommodations for reductions in strength and stiffness due to panel profiling or other face- or edge-finishes must be made. The Appendix of ANSI/APA PRG 320 provides examples of CLT appearance classifications.

Structural adhesives used in bonding laminations must comply with CSA O112.10 and ASTM D7247 and are also evaluated for heat performance during exposure to fire.

The different classes of structural adhesives that are typically used include:

  • Emulsion polymer isocyanate (EPI);
  • One-component polyurethane (PUR);
  • Phenolic types such as phenol-resorcinol formaldehyde (PRF).

Since pressure treatment with water-borne preservatives can negatively affect bond adhesion, CLT is not permitted to be treated with water-borne preservatives after gluing. For CLT treated with fire-retardant or other potentially strength-reducing chemicals, strength and stiffness is required to be based on documented test results.

As part of the prefabrication process, CLT panels are cut to size, including door and window openings, with state-of-the art computer numerical controlled (CNC) routers, capable of making complex cuts with low tolerances. Prefabricated CLT elements arrive on site ready for immediate installation. CLT offers design flexibility and low environmental impacts for floor, roof and wall elements within innovative mid-rise and tall wood buildings.

Cross-laminated timber board

 

For further information on CLT, refer to the following resources:

Kalesnikoff

Structurlam Mass Timber Corporation

Nordic Structures

APA – The Engineered Wood Association

Canadian Construction Materials Centre (CCMC)

Element5

ANSI/APA PRG 320 Standard for Performance-Rated Cross-Laminated Timber

CSA O86 Engineering design in wood

CSA O112.10 Evaluation of Adhesives for Structural Wood Products (Limited Moisture Exposure)

ASTM D7247 Standard Test Method for Evaluating the Shear Strength of Adhesive Bonds in Laminated Wood Products at Elevated Temperatures

The 2025 Ottawa Wood Solutions Conference will be presented on February 5, 2025 at the National Arts Centre
Additional sources of information
CodeCHEK
Durability Guidelines
Wood’s Durable Heritage
Tall Wood Buildings – Research
Mid-Rise Buildings – Research
Supplemental Treatment
Tall Wood Buildings
Framing Connectors
Mass Timber
Cross-Laminated Timber (CLT)

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