Mass-wood CLT building survives earthquake test
https://www.woodworkingnetwork.com/news/woodworkin... [Seismic Performance] [Magazine/Newspaper Article] 2017
Bill Esler
A full-scale validation of new CLT wood building components  was completed at The successful test took place on the world’s largest outdoor shake table, at the University of California San Diego. Katerra, a construction startup investing heavily in cross-laminated timber (CLT) construction material, saw its seismic shear wall tested. DR Johnson, a leading developer and supplier of CLT products, also saw them tested on the table. This first of its kind research project in the U.S. was reported Ju...

Cross-laminated timber made of Hungarian raw materials
http://iopscience.iop.org/article/10.1088/1757-899... [Raw Materials] [Conference Paper] 2016
G. Marko, L. Bejo, P. Takats
Cross-laminated timber (CLT), generally made out of softwood, enjoys increasing popularity throughout Europe. Transporting raw materials from other countries (sometimes thousands of kilometres away) negates the environmental advantages of wood-based construction. Poplar wood (populus spp.) is of great economic importance in Hungary. There are several relatively high density, high strength varieties growing in large quantities in Hungary, that may be used as alternatives to softwood, with compara...

IPCC Report Cites Value of Wood Products to Mitigate Climate Change
https://www.fpl.fs.fed.us/labnotes/?p=3303... [Markets] [Web Page] 2014
James T. Spartz
Some key climate change mitigation benefits from the use of wood have been cited by the Intergovernmental Panel on Climate Change (IPCC) 5th Assessment report on Mitigation of Climate Change....

Influence of the Connection Modelling on the Seismic Behaviour of Crosslam Timbe
https://link.springer.com/chapter/10.1007/978-94-0... [Seismic Performance] [Book/Book Section] 2014
I. Sustersic, B. Dujic, Massimo Fragiacomo
The paper investigates the influence of modelling different types of connections in multi-storey cross-laminated timber buildings. The importance of modelling the connection flexibility in the prediction of the natural vibration periods and the base shear force of a crosslam building is demonstrated using linear-dynamic analysis. The building’s global ductility and peak ground acceleration were compared using non-linear static and dynamic analyses, demonstrating that the former may lead to non-...

Perspectives Archives
https://oregonclt.com/category/blog/?paged2=1... [General Information] [Web Page]
Oregon CLT
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DES602 – Tall Wood Structures: Fire Resistance Design Primer for Mass Timber Con
http://www.awc.org/education/main/lists/des-design... [Fire Performance] [Presentation] 2015
American Wood Council
This presentation examines how fire resistance ratings in the 2015 International Building Code (IBC) apply to mass timber and heavy timber construction. Topics include how the IBC incorporates fire testing and calculation methods to quantify fire resistance as well as how various materials, including wood, behave when exposed to high temperatures in fires. Discussion will include code compliant calculation methods for fire resistance ratings of wood frame assemblies and for wood members exposed ...

Analysis of Mechanical Properties of Cross-Laminated Timber (CLT) with Plywood using Korean Larch
https://bioresources.cnr.ncsu.edu/wp-content/uploa... [Raw Materials] [Journal Article] 2018
Chul Choi, Erina Kojima, Kyung-Jung Kim, Mariko Yamasaki, Yasutoshi Sasaki, Seog-Goo Kang
The bending strength of hybrid wooden-core laminated timber (HWLT), a composite material made from existing cross-laminated timber (CLT) and plywood, was analyzed. Using plywood makes it possible to decrease the bending strength of the starting material. Korea Larch (Larix kaempferi Carr.) was used as plywood because of its popularity in Korea. To analyze HWLT’s bending properties, each component (lamina, plywood) was tested for bending, compression, and tensile strengths. The results showed tha...

Cross-laminated residential towers
https://www.techniker.co.uk/media/2046/cross-lamin... [Tall Buildings] [Report] 2014
TRADA
Andrew Waugh and Matthew spell out their timber solution for apartments rising to nearly 100m - Tall timber buildings, wooden skyscrapers, are the current construction space race. Around the world architects and engineers are eagerly researching what once would have appeared to be impossible: tall timber towers of 20 storeys plus....

The Future of Timber Construction: Cross Laminated Timber
http://www.clt.info/wp-content/uploads/2017/06/Sto... [Case Study/Projects] [Presentation] 2017
Ona Horx-Strather,Christiane Varga,Georg Guntschnig
If the terms naturalness, comfort and ecology are considered in the context of using materials for building future-oriented architecture, then it becomes apparent relatively quickly that this must concern the raw material wood. Whether we are thinking about designer elements for defining high-quality architecture or focusing on the realisation of contemporary and sustainable buildings, wood as a natural raw material has established its position and is currently undergoing a revival quite unli...

Massive factory planned for CLT lumber components in Washington State
https://www.woodworkingnetwork.com/news/woodworkin... [General Information] [Magazine/Newspaper Article] 2017
Bill Esler
SPOKANE VALLEY, Calif. – Katerra, a high-tech construction firm, will open a new factory in Spokane Valley, Washington, where it will produce mass timber products including cross-laminated timber (CLT) and Glulam. Katerra is already applying its high-tech construction techniques to manufacture building sections in an existing Phoenix factory, in processes similar to auto plant plants. Katerra says its new 250,000 square foot mass timber manufacturing facility will help scale up U.S. production ...

Insights Into the Global Cross-Laminated Timber Industry
http://biobus.swst.org/index.php/bpbj/article/view... [Markets] [Journal Article] 2017
Lech Muszynski, Eric Hansen, Shanuka Fernando, Gabriel Schwarzmann, Jasmin Rainer
Cross laminated timber (CLT) has, in recent years, grown from an invention to a much celebrated product and building technology revolutionizing the use of massive timber in construction. The CLT industry is concentrated in Alpine Europe, where the technology was originally developed and where most CLT is still produced. Despite great interest, the rate of adoption of CLT technology in the US is slow, reflecting uncertainty with regard to whether the European models can be successfully transplant...

International Beams says its upcoming CLT plant will be the biggest in U.S.
https://www.woodworkingnetwork.com/news/woodworkin... [Case Study/Projects] [Magazine/Newspaper Article] 2017
Robert Dalheim
International Beams says the plant will be the biggest cross-laminated timber manufacturing facility in the U.S. when it opens in early 2018. The $19.6 million expansion will create 60 jobs at the plant right away, and create other jobs in local timber, sawmill, and trucking. Two hundred jobs will be created altogether....

Tapered Beams Made of Cross Laminated Timber
https://link.springer.com/content/pdf/10.1007%2F97... [Mechanical Performance] [Book/Book Section] 2014
Marcus Flaig, Hans Joachim Blab
A method to determine strength reduction factors for tapered beams made of cross laminated timber (CLT) is presented. The method is based on EC5 equations for the calculation of strength reduction factors for tapered glulam beams. For CLT-beams, however, the required strength properties, i.e. the shear strength and the tensile or compressive strength perpendicular to the longitudinal direction, are determined considering the beam layup and the different failure modes both affecting the character...

Monotonic Quasi-static Testing of CLT Connections (REVISED - Version 3)
http://cwc.ca/wp-content/uploads/2015/04/Monotonic... [Mechanical Performance] [Report] 2015
Jose Daniel Candelario
...

Full Scale Exterior Wall Test on Nordic Cross-Laminated Timber Systems
http://cwc.ca/wp-content/uploads/2015/04/Full-Scal... [Fire Performance] [Report] 2015
Eric Gibs, Joseph Su
...

Report of Testing Cross-Laminated Timber Panels for compliance with the applicable requirements of the following criteria: ASTM E119-14 Standard Test Methods for Fire Tests of Building Construction and Materials, October 2014 Edition, and CAN/ULC-S101-07 S
http://cwc.ca/wp-content/uploads/2015/04/Canadian-... [Fire Performance] [Report] 2014
Intertek
Intertek Testing Services NA, Inc. (Intertek) has conducted testing for the Canadian Wood Council, on Cross-Laminated Timber Panels, to evaluate their fire resistance. Testing was conducted in accordance with the applicable requirements, and following the standards methods, of ASTM E119-14 Standard Test Methods for Fire Tests of Building Construction and Materials, October 2014 Edition, and CAN/ULC-S101-07 Standard Methods of Fire Endurance Tests of Building Construction and Materials. This eval...

Report of Testing Cross-Laminated Timber Panels for compliance with the applicable requirements of the following criteria: ASTM E119-12a Standard test Methods for Fire Tests of Building Construction and Materials, January 2012 Edition, and CAN/ULC-S101-07
http://cwc.ca/wp-content/uploads/2015/04/Canadian-... [Fire Performance] [Report] 2013
Intertek
Intertek Testing Services NA, Inc. (Intertek) has conducted testing for the Canadian Wood Council, on Cross-Laminated Timber Panels, to evaluate their fire resistance. Testing was conducted in accordance with the applicable requirements, and following the standards methods, of ASTM E119-12a Standard Test Methods for Fire Tests of Building Construction and Materials, January 2012 Edition, and CAN/ULC-S101-07 Standard Methods of Fire Endurance Tests of Building Construction and Materials. This eva...

Report of Testing Cross-Laminated Timber Panels for compliance with the applicable requirements of the following criteria: CAN/ULC S101 Standard Methods of Fire Endurance Tests of Building Construction and Materials, fourth Edition, July 2007
http://cwc.ca/wp-content/uploads/2015/04/Canadian-... [Fire Performance] [Report] 2012
Intertek
Intertek Testing Services NA, Inc. (Intertek) has conducted testing for the Canadian Wood Council, on Cross-Laminated Timber Panels, to evaluate their fire resistance. Testing was conducted in accordance with the applicable requirements, and following the standards methods, of CAN/ULC S101 Standard Methods of Fire Endurance Tests on Building Construction and Materials, fourth Edition, July 2007. This evaluation took place on December 30, 2011....

In-Plane Stiffness of Cross-Laminated Timber Panels with Openings
http://www.ingentaconnect.com/contentone/iabse/sei... [Mechanical Performance] [Journal Article] 2017
Md Shahnewaz, Tannert Thomas, M. Shahra Alam, Marjan Popovski
Cross-laminated timber (CLT) is increasingly being used in residential and nonresidential applications. While the quantification of the in-plane stiffness of CLT shear walls is required to design a CLT structure subjected to lateral loads, the design guidance, specifically for walls with openings, is limited. The study quantified the stiffness of CLT panels under in-plane loading. A finite element analysis model of CLT panels was developed and verified with test results of CLT panels under in-pl...

A Stiffness-based Approach to Analyze the Fire Behaviour of Cross-Laminated Timber Floors
http://www.ingentaconnect.com/contentone/iabse/sei... [Fire Performance] [Journal Article] 2017
Lorenzo Franzoni, Dhionis Shima, Florent Lyon, Arthur Lebee, Gilles Foret
In the present paper, the experimental deflection of cross-laminated timber floors exposed to fire is predicted with the use of advanced and simplified methods. The accurate modelling is based on heat transfer prediction and reduced stiffness, while the simplified methods are based on reduced cross-section method (RCSM) of EN 1995 1-2 (CEN, 2004). All methods are combined with a thick plate theory for laminates in order to compute the mid-span deflection of the floors. The more accurate modellin...