Damage Assessment of Cross Laminated Timber Connections Subjected to Simulated Earthquake Loads
http://support.sbcindustry.com/Archive/2012/july/P... [Connectors] [Conference Paper] 2012
Johannes Schneider, Siegfried Stiemer, Solomon Tesfamariam, Erol Karacabeyli, Marjan Popovski
Wood-frame is the most common construction type for residential buildings in North America. However, there is a limit to the height of the building using a traditional wood-frame structure. Cross-laminated timber (CLT) provides possible solutions to mid-rise and high-rise wood buildings. CLT offers many advantages such as improved dimensional stability, a quicker erection time and good performance in case of fire. In order to introduce the crosslaminated timber products to the North American ma...

Multi-Functional Interface Concept for High-Rise Hybrid Building Systems with Structural Timber
http://support.sbcindustry.com/Archive/2012/july/P... [Alternative/Hybrid Configurations] [Conference Paper] 2012
Jan Weckendorf, Ian Smith
Recapturing the 19 th century position that timber held as a primary structural material for mid-rise construction, and potentially gaining such a niche in high-rise construction, depends on demonstrating feasibility and advantages of its use. A hybrid construction concept is presented here that utilizes timber and other materials to create multi-functional interfacial slab substructures, that act together with frameworks and shear-walls of various materials to create building superstructures. I...

Improving the Packaging of Crosslaminated Timber: A Master Thesis That Examines the Environment and Methods at Martinsons Såg, Bygdsiljum
http://www.diva-portal.org/smash/record.jsf?pid=di... [Environmental Performance] [Thesis/Dissertation] 2017
Viktor Berglund
This thesis is the final assignment for the program master of science in Industrial Design Engineering at luleå university of technology. The timespan is September of 2017 and early January 2018 and is equivalent to 30 high school credits. The work was performed at Martinsons Såg in Bygdsiljum, Sweden. Martinsons is Sweden’s largest producer of cross-laminated timber, crosslam. The staff is divided into two shifts with nine workers each. The production consists of three sections, gluing, CNC and...

In Situ Measured Flanking Transmission in Light Weight Timber Houses with Elastic Flanking Isolators
http://www.diva-portal.org/smash/record.jsf?pid=di... [Vibration/Acoustic Performance] [Conference Paper] 2013
Anders Ågren, Fredrik Ljunggren
There is a strong trend to industrially produce multi-storey light weight timber based houses. This concept allows the buildings to be manufactured to a more or less prefabricated extent. Most common types are volume/room modules or flat wall and floor modules. When assembling the modules at the building site, elastomer isolators are used in several constructions to reduce flanking transmission. The sound insulation demands in the Nordic countries are relatively high and therefore the flanking t...

Case Study: Brock Commons Tallwood House
https://www2.gov.bc.ca/assets/gov/environment/clim... [Case Study/Projects] [Report] 2017
Brock Commons, 1Tallwood House, 1 Leed, 1Bd+c Gold, 1Architekten Hermann Kaufmann, 1Fast + Epp,
Brock Commons Tallwood House is a landmark 18-storey residence building at UBC in Vancouver with 17 storeys of wood and concrete construction over a single storey concrete podium. At 53 metres, it is the tallest contemporary wood hybrid building in the world to-date. Brock Commons provides the University with over 400 student beds, with a shared ground floor study and social space....

Full-Scale Fire Resistance Tests on Cross-Laminated Timber
http://www.nrc-cnrc.gc.ca/ci-ic/en/article/v17n4-4... [Fire Performance] [Report] 2013
Noureddine Bénichou
Full-scale tests carried out by NRC Construction researchers have demonstrated that cross-laminated timber (CLT) assemblies can achieve good levels of fire resistance, even when unprotected under full loading conditions. The tests are part of a study recently launched by NRC in collaboration with FPInnovations to develop a methodology that will foster the design of fire-safe CLT or hybrid buildings in North America. The study will also facilitate the acceptance of future code provisions for the ...

Cross-Laminated Timber Manufacturing Plant Project Report: Industry Trends, Manufacturing Process, Machinery, Raw Materials, Cost and Revenue
https://www.researchandmarkets.com/reports/4514582... [Markets] [Report] 2017
Research and Markets
Cross-laminated timber (CLT) is an engineered wood product that is rapidly gaining popularity in Europe and North America as a sustainable alternative to concrete and steel construction in commercial and multi-residential applications. The system consists of multilayer panels made from solid wood boards stacked crosswise and glued together. The cross-laminated configuration improves rigidity, dimensional stability, and mechanical properties. Structurally, CLT offers performance comparable to con...

Experimental and Numerical Analyses of New Massive Wooden Shear-Wall Systems
https://www.mdpi.com/2075-5309/4/3/355... [Mechanical Performance] [Journal Article] 2014
Luca Pozza, Roberto Scotta, Davide Trutalli, Mario Pinna, Andrea Polastri, Paolo Bertoni
Three innovative massive wooden shear-wall systems (Cross-Laminated-Glued Wall, Cross-Laminated-Stapled Wall, Layered Wall with dovetail inserts) were tested and their structural behaviour under seismic action was assessed with numerical simulations. The wall specimens differ mainly in the method used to assemble the layers of timber boards composing them. Quasi-static cyclic loading tests were carried out and then reproduced with a non-linear numerical model calibrated on the test results to es...

Fire Safety Challenges of Tall Wood Buildings – Phase 2: Task 2 & 3 – Cross Laminated Timber Compartment Fire Tests
https://www.nist.gov/publications/fire-safety-chal... [Fire Performance] [Report] 2018
Joseph Su, Pier-Simon Lafrance, Matthew Hoehler, Matthew Bundy
This study quantifies the contribution of cross laminated timber (CLT) building elements to compartment fires and characterizes the effect of gypsum board on delaying or preventing involvement of the CLT in the fire under varied ventilation conditions. Six compartments (9.1 m long x 4.6 m wide x 2.7 m high) were assembled out of prefabricated CLT panels. Each panel was factory assembled using five plies of 35 mm thick lumber for a total thickness of 175 mm. A polyurethane adhesive was used to ho...

Life Cycle Assessment of a Cross Laminated Timber Building
https://www.fwpa.com.au/images/marketaccess/PRA282... [Environmental Performance] [Report] 2013
Bart Durlinger, Enda Crossin, James Wong
Lend Lease is constructing a new residential building using cross laminated timber (CLT). This material is a relatively new building material in Australia, which has found increased use in multi-story residential and commercial buildings, particularly in Europe. The Centre for Design (CfD), School of Architecture and Design, RMIT University was commissioned by Lend Lease through Forest and Wood Products Australia (FWPA), to investigate the environmental performance associated with the production...

A Dissipative Connector for CLT Buildings: Concept, Design and Testing
https://www.mdpi.com/1996-1944/9/3/139/htm... [Connectors] [Journal Article] 2016
Roberto Scotta, Luca Marchi, Davide Trutalli, Luca Pozza
This paper deals with the conception and characterization of an innovative connection for cross-laminated timber (CLT) panels. The connection is designed to provide an adequate level of dissipative capacity to CLT structures also when realized with large horizontal panels and therefore prone to fragile shear sliding failure. The connector, named X-bracket, has been theorized and designed by means of numerical parametric analyses. Furthermore, its cyclic behavior has been verified with experiment...

Development of Evaluation Methodology for Rolling Shear Properties in Cross Laminated Timber (CLT)
https://unbscholar.lib.unb.ca/islandora/object/unb... [Mechanical Performance] [Thesis/Dissertation] 2013
Qinyi Zhou
The rolling shear modulus is very low, leading to rolling shear failure in the cross layer of cross-laminated timber (CLT). The overall objective of this thesis work was to develop an appropriate methodology for measuring the rolling shear properties of CL T. This research consists of three article format chapters, which were aimed at: 1) obtaining a better understanding of advantages and disadvantages of using the bending test and twoplate shear test for determining the rolling shear properties...

The Fire Performance of Exposed Timber Panels
https://waset.org/Publication/the-fire-performance... [Fire Performance] [Journal Article] 2014
Bernice Wong, Kong Fah Tee
Cross-laminated timber is increasingly being used in the construction of high-rise buildings due to its simple manufacturing system. In term of fire resistance, cross-laminated timber panels are promoted as having excellent fire resistance, comparable to that of non-combustible materials and to heavy timber construction, due to the ability of thick wood assemblies to char slowly at a predictable rate while maintaining most of their strength during the fire exposure. This paper presents an overvi...

Characterizing Influence of Laminate Characteristics on Elastic Properties of Cross Laminated Timber
https://www.adivbois.org/wp-content/uploads/Can_0_... [Mechanical Performance] [Conference Paper] 2014
Jan Niederwestberg, Ying Hei Chui
Properties of CLT panels are influenced by the properties of their layers and the layer properties are in turn influenced by the structural characteristics of the laminate material. In order to realize the mechanical property potential of CLT panels it is necessary to understand the effects of laminate properties on the performance of the final product. This paper presents the approach and outcomes of an on-going study dealing with the evaluation of material and structural characteristics of lam...

Case Studies of Risk-To-Life Due to Fire in Mid- and High-Rise, Combustible and Non-Combustible Buildings Using Curisk
https://www.bcfii.ca/system/files/reports/public/f... [Fire Performance] [Report] 2015
Xia Zhang, Jim Mehaffey, George Hadjisophocleous
In this project, CUrisk was employed to assess and compare the risk‐to‐life due to fire in mid‐rise and high‐rise residential and office buildings of wood construction and of non‐combustible construction and to demonstrate how fire protection measures can be tuned to ensure a mid‐rise or high‐rise building of wood construction is as safe as a similar building of non‐combustible construction. ...

Improvement of Shear Strength, Wood Failure Percentage and Wet Delamination of Cross-Laminated Timber (CLT) Panels Made with Superheated Steam Treated (SHST) Layers of Larch Wood
https://www.degruyter.com/view/j/hfsg.2017.71.issu... [Mechanical Performance] [Journal Article] 2017
Yeonjung Han, Yonggun Park, Yoon-Seong Chang, Hyunwoo Chung, Chang-Deuk Eom, Hwanmyeong Yeo
Cross-laminated timber (CLT) panels – consisting of several cross-wise stacked layers of glued boards – have a high dimensional stability. However, the outer surfaces of CTL are exposed to environmental humidity changes and thus to swelling and shrinking. To improve CLT’s dimensional stability further, the layers of kiln dried (KD) CLT were substituted partly (on the surfaces) and entirely with superheated steam treated (SHST) wood. The effects of SHST wood and the performance of the one-compone...

Fire Safety Engineering of High Rise Timber Buildings
https://repository.tudelft.nl/islandora/object/uui... [Fire Performance] [Thesis/Dissertation] 2012
Giulio Longhi
During this MSc thesis it has been carried out an extensive literature review on fire safety engineering, on timber behaviour on fire and on fire safety regulations in different countries. A preliminary design for a high rise cross laminated timber building (CLT) has been carried out in order to obtain a minimum thickness of the structural elements needed for the load bearing structure. This thickness has been verified according to prescriptive fire regulations. Furthermore, fire safety analyses...

Effect of Knots and Slope of Grains on the Rolling Shear in Dimensional Timber Used in CLT Core Layers
https://repositum.tuwien.ac.at/obvutwoa/content/pa... [Mechanical Performance] [Conference Paper] 2016
Thibault Grandvuinet, Lech Muszynski
The cross-laminated timber (CLT) technology is also perceived as a potential for utilization of lumber of lower grades and underused species, because the core layers perpendicular to the principle loading direction transfer loads through rolling shear, which is not correlated to the grade of lumber. Current the product standard however specifies the minimum grade requirements for all lumber to be used as CLT laminations. In this study the effect of the presence of knots in the transverse core la...

Experimental and Numerical Investigations of the Relevant Parameters on the Bending Resistance of Cross Laminated Timber
https://mediatum.ub.tum.de/1173168?id=1173168... [Mechanical Performance] [Thesis/Dissertation] 2014
Stefan Bedö
The bending load bearing capacity of cross-laminated timber is dependent on a multitude of different properties and characteristics (wood quality, finger joint strength, size, etc.). In order to investigate these various parameters and systemically determine their effects, a large number of tests using true component size would be required. Due to time and cost constraints, such tests are not feasible. Instead, for this purpose, a computational model is developed to numerically investigate the r...

Heat Storage-Insulation Mutual Effect of Solid Wood Panels
https://hosei.repo.nii.ac.jp/?action=pages_view_ma... [Other] [Thesis/Dissertation] 2015
Takuya Urushihara
Thick wood constructions, like CLT or log walls, are excellent both in heat insulation and heat storage, as well as in structural resistance. Instead of evaluating respectively the technical advantages, this paper focuses on the mutuality of these performances, especially from the view point of thermal conditions. Numerical analysis with a conventional software revealed the results as following: Although it is not reasonable to realize thermally sufficient room conditions only with thick wood pa...