CLT Adhesive Tests in Support of Mass Timber Buildings DES604
https://awc.org/pdf/education/des/AWC-DES604-CLTAd... [Bonding/Adhesives] [Presentation] 2017
Jason Smart, Sam Francis
Adhesive bonding of wood laminations allows for the manufacture of large wood members. Adhesives used for this purpose must meet specified levels of resistance to heat at elevated temperatures. This performance is determined through testing. Code-referenced standards currently require such adhesives to pass a bond line shear test at elevated temperatures as a demonstration of this performance. The presentation will include an overview of the manufacturing of glued engineered wood products and th...

Disproportionate collapse analysis of mid-rise cross-laminated timber buildings
https://www.researchgate.net/publication/324114719... [Seismic Performance] [Journal Article] 2018
Hercend Mpidi Bita, Neil Currie, Thomas Tannert
This paper investigates the structural behaviour of a twelve-storey Cross-Laminated Timber (CLT) building subjected to sudden removal of internal and external ground floor loadbearing walls, and computes the probability of disproportionate collapse. Analyses are carried out at three different structural idealisations, accounting for feasibility and complexity of finite elements models to understand their performance at: (i) the global, (ii) the component and (iii) the connection level. Focus is ...

An analytical formulation of q-factor for mid-rise CLT buildings based on parametric numerical analyses
https://link.springer.com/article/10.1007%2Fs10518... [Seismic Performance] [Journal Article] 2017
Luca Pozza, Davide Trutalli
The seismic response of cross-laminated timber buildings is analysed with the aim of assessing the correlation between the dissipative capacity (i.e., q-factor) and the assembling methodologies and geometrical properties. A parametric study was performed by means of incremental dynamic analyses on various building configurations with varying constructive features such as density of panel-to-panel joints and building slenderness. The results are firstly used to define parameters representative of...

Tall Mass-Timber Building
https://vtechworks.lib.vt.edu/handle/10919/78297... [Tall Buildings] [Thesis/Dissertation] 2017
Morales Sabogal, Agni Amram
How can we as design professionals contribute to increase the use of less carbon-intensive materials to build our growing cities? Cities are experiencing a resurgence in population growth and therefore the building industry ought to attend this demand with sustainable solutions. One way of responding to the growing urban population and increase demand for housing as well as to make efficient use of our limited resources is to increase the density in our cities. Since steel and concrete have hig...

Blast Testing Research
http://www.woodworks.org/publications-media/blast-... [Other] [Others] 2017
WoodWorks
WoodWorks, in cooperation with the USDA Forest Service Forest Products Lab and Softwood Lumber Board, conducted a series of successful blast tests on two-story, mass timber structures at Tyndall Air Force Base. Products tested include cross-laminated timber (CLT) and nail-laminated timber (NLT). The success of this testing expands the options for wood building design. WoodWorks is working with Karagozian & Case, Inc., the Air Force Civil Engineer Center and the U.S. Army Corps of Engineers to a...

Seismic behaviour and design of tall cross-laminated timber buildings
https://www.researchgate.net/publication/311065666... [Seismic Performance] [Journal Article] 2017
Cagatay Demirci, Christian Málaga-Chuquitaype, L. Macorini
With half of the world's mega cities located in seismic regions, there is an urgent need for tall structures that can withstand the large demands imposed by earthquakes while minimizing the environmental costs associated with their construction and maintenance. In this context, tall timber construction has the potential to enable an efficient use of urban space at the lowest possible environmental cost. In particular, Cross-Laminated Timber (CLT) panels have many advantages over other traditiona...

An Innovative Connection System for Cross-Laminated Timber Structures
https://www.researchgate.net/publication/321173755... [Connectors] [Journal Article] 2017
Andrea Polastri, Ivan Giongo, Maurizio Piazza
The paper presents a new connection system for cross-laminated timber (CLT) structures, named X-RAD. This innovative connection system is characterised by the use of a single connector type that is positioned at the corners of the CLT panels. X-RAD is formed by a metal part surrounding a hardwood insert that is fixed to the panels by means of all-threaded screws introduced with double inclination. The peculiar geometry of the connector and the combination of different materials allow the full ex...

Calculating the Fire Resistance of Wood Members and Assemblies
https://awc.org/pdf/codes-standards/publications/t... [Fire Performance] [Report] 2018
American Wood Council
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Blast Testing of Loaded Mass Timber Structures - Project Report
http://www.woodworks.org/wp-content/uploads/WoodWo... [Other] [Report] 2017
WoodWorks
...

Numerical and experimental thermal-structural behaviour of laminated veneer lumber (LVL) exposed to fire
https://www.researchgate.net/publication/267989439... [Fire Performance] [Journal Article] 2010
Massimo Fragiacomo, Agnese Menis, Peter J. Moss, Isaia Clemente, Andrew H. Buchanan
The paper presents a numerical model implemented in the Abaqus finite element code for fire resistance of timber members. The fire resistance is evaluated in a two-step process: first, a thermal analysis of the member exposed to fire is carried out, and then a structural analysis under a constant load is performed over time. In the structural analysis, the reduction in mechanical properties (modulus of elasticity and strength) of timber with temperature is considered. The analysis terminates whe...

New Wood Materials: Cross Laminated Timber (CLT)
https://www.structuremag.org/?p=661... [General Information] [Magazine/Newspaper Article] 2013
John “Buddy” Showalter
Cross Laminated Timber (CLT) is a flexible building system suitable for use in all assembly types (e.g., walls, floors, and roofs). Made from industrial dried lumber stacked together at right angles and glued over their entire surface, it is an exceptionally strong product that retains its static strength and shape, and allows transfer of loads on all sides. Panels are prefabricated based on the project design, and arrive at the job site with windows and doors pre-cut. Although size varies by ma...

Freres Lumber Co., Inc.
https://www.apawood.org:443/MemberMill?MemberMillI... [Commercial/Company Information] [Web Page] 2017
APA
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Prediction of bending stiffness and moment carrying capacity of sugi cross-laminated timber
https://link.springer.com/article/10.1007%2Fs10086... [Raw Materials] [Journal Article] 2013
Minoru Okabe, Motoi Yasumura, Kenji Kobayashi, Kazuhiko Fujita
Cross-laminated timber (CLT) panels consist of several layers of lumber stacked crosswise and glued together on their faces. Prototype sugi CLT floor panels were manufactured and bending tests were carried out under the different parameters of lumber modulus of elasticity (MOE), number of layers, thickness of lumber and thickness of CLT panels. On the basis of above tests, bending stiffness and moment carrying capacity were predicted by Monte Carlo method. MOE of lumber was measured by using gra...

Modeling the bending vibration of cross-laminated timber beams
https://link.springer.com/article/10.1007%2Fs00107... [Vibration/Acoustic Performance] [Journal Article] 2017
Bart Van Damme, Stefan Schoenwald, Armin Zemp
Cross-laminated timber (CLT) is an economical construction material combining good structural properties and environmental advantages. Due to the layered geometry and the associated internal stress boundary conditions, modelling its dynamic behavior is complex. However, accurate vibration level estimations are necessary to estimate the sound insulation performance of CLT constructions. This paper outlines a method to determine the relevant elastic constants and the appropriate equations of motio...

Standing Tall
https://www.canadianarchitect.com/features/brock-c... [Case Study/Projects] [Magazine/Newspaper Article] 2018
Courtney Healey
Because it’s 2018, tall wood and mass timber are here to stay. In the race to be the tallest wood tower in the world, he current title-holder, as of this writing, is Brock Commons Tallwood House, an 18-storey student residence at the University of British Columbia, designed by Acton Ostry Architects (AOA) in Vancouver. As Bruce Haden reported in this magazine during the building’s construction last year (See “Reaching New Heights,” Canadian Architect, February 2017), we know that mass timber 
is...

Nordic Structures - Home
https://www.nordic.ca/... [Commercial/Company Information] [Web Page] 2019
Nordic Structures
Nordic Structures is a company dedicated to engineered wood products for the construction industry. Our solutions are tailor made for tomorrow’s school, commercial, industrial, infrastructure, institutional, multiresidential, recreational, and residential projects. With our sister company, Chantiers Chibougamau, Nordic Structures has over 50 years experience and expertise as wood processing innovators. Cross-laminated timber (CLT) is the latest addition to our product line. We also provide tech...

The Reduced Cross-Section Method for the Design of Timber Structures Exposed to Fire - Background, Limitations, and New Developments
https://www.researchgate.net/publication/263559201... [Fire Performance] [Journal Article] 2012
Joachim Schmid, Jurgen Konig, Alar Just
The load resistance of timber members exposed to fire is determined from the uncharred residual cross section. Owing to elevated temperatures in parts of the residual cross section, the strength and stiffness properties are lower than under normal conditions. The effective residual cross-section model provides a simplified user-friendly design concept to account for the reduced properties of timber exposed to fire. A fictitious zero-strength layer is removed from the residual cross section obtai...

Overview of systems in timber engineering. Use of Cross laminated timber with two concrete examples
https://upcommons.upc.edu/bitstream/handle/2117/80... [Case Study/Projects] [Thesis/Dissertation] 2015
Xavier Sucarrats Olius
This project summarizes the most common timber systems used over time. It studies thoroughly the wood product “Cross laminated timber”, which is a relatively new wood product that was first introduced in the 1990’s in Austria and has gained popularity in residential and non-residential buildings in many European countries and around the world in the recent past. Two specific projects of two existing single-family houses are designed with CLT solid wood panels...

Significant Changes to the 2015 IBC, NDS and SDPWS - BCD120
https://www.awc.org/pdf/education/bcd/AWC-BCD120-S... [Standards/Building code] [Presentation] 2016
American Wood Council
What are the latest trends in the world of code development related to wood? How are wood design standards keeping up with technology? This presentation will provide an overview of some of the significant code changes for wood construction per the International Code Council's 2015 International Building Code (IBC) and American Wood Council's 2015 National Design Specification (NDS) for Wood Construction and 2015 Special Design Provisions for Wind and Seismic (SDPWS)....

BCD130-2018 IBC and 2018 IRC Significant Changes Related to Wood Construction
https://www.awc.org/pdf/education/bcd/AWC-BCD130-2... [Standards/Building code] [Presentation] 2018
Sandra Hyde, Michelle Kam-Biron, James B. Smith
The 2018 International Building Code (IBS) and 2018 International Residential Code (IRC) published by the International Code Council are now available. This presentation will provide an overview of the significant changes to wood design and construction provisions relative to the previous editions. ...