Elastic response of cross-laminated engineered bamboo panels subjected to in-plane loading
https://researchportal.bath.ac.uk/files/157211246/... [Raw Materials] [Journal Article] 2019
Hector F Archila, Andrew Rhead, Martin P Ansell, Pete Walker, Juan Lizarazo-Marriaga
Novel cross-laminated bamboo panels comprising three and five layers (G-XLam3 and G-XLam5) were tested in compression along the main (0°) and the transverse (90°) directions. Linear variable differential transformer (LVDT) and non-contact three-dimensional digital image correlation (DIC) measuring techniques were used separately to measure deformation in the elastic region, and the elastic moduli, Ep C,0 and Ep C,90 , were derived. Mean elastic modulus values obtained using LVDTs exhibited a goo...

First dowel-laminated timber building in the U.S. set to open in Des Moines
https://archpaper.com/2019/06/des-moines-dowel-lam... [Markets] [Magazine/Newspaper Article] 2019
Drew Zeiba
A four-story mixed-use structure in Des Moines, Iowa, will be the first building in the U.S. to be constructed with dowel-laminated timber, an all-wood mass timber product that is held together without nails, glue, or fasteners and can be assembled with friction-fit wood connectors....

Basic kinematics used for developing of the simplified CLT wall models  | Downlo
https://www.researchgate.net/figure/Basic-kinemati... [Seismic Performance] [Others]

Download Copy reference Copy caption Embed figure View publication Basic kinematics used for developing of the simplified CLT wall models  Source publication Force Modification Factors for CLT Structures for NBCC Conference Paper Full-text available Jan 2013 Marjan Popovski Shiling Pei John W. van de Lindt Erol Karacabeyli Cross-laminated timber (CLT) as a structural system is not introduced in European or North American building codes, and there is limited information available on the seismic ...

Thermal comfort, summertime temperatures and overheating in prefabricated timber housing
https://www.researchgate.net/publication/299651120... [Other] [Journal Article] 2016

Timber is increasingly used in construction of buildings due to its green credentials and ability to reduce the overall construction period when compared with conventional materials. However, the lack of thermal mass along with the low U-values can be a risk factor in increasing overheating. This paper investigates the indoor thermal conditions and overheating risk in prefabricated timber buildings focusing on two buildings built in the last decade in the UK, Oxley Woods and Bridport. The study ...

NDE Lab Notes - Technology Helps Turn Salvaged Trees into Moneymakers
https://www.fpl.fs.fed.us/labnotes/?tag=nde... [Raw Materials] [Report] 2017
Rebecca Wallace
When insect scourges run rampant through forested ecosystems they can leave behind entire stands of dead and dying trees – especially if that scourge is the spruce budworm. In the Upper Midwest, where the spruce budworm infests forests on a cyclic 30-50 year pattern, forest managers oftentimes use salvaged logs from the dead and dying trees to produce low-value wood products, such as wood pulp, or merely count the dead trees as a loss and leave them standing. But Forest Products Laboratory (FPL)...

Seismic drift demands in multi‐storey cross‐laminated timber buildings
http://doi.wiley.com/10.1002/eqe.3003... [Seismic Performance] [Journal Article] 2017
Cagatay Demirci, Christian Málaga‐Chuquitaype, Lorenzo Macorini
Earthquake Engineering & Structural DynamicsVolume 47, Issue 4 RESEARCH ARTICLE Full Access Seismic drift demands in multi‐storey cross‐laminated timber buildings Cagatay Demirci Department of Civil and Environmental Engineering, Imperial College London, London, UKSearch for more papers by this author Christian Málaga‐Chuquitaype Corresponding Author E-mail address: c.malaga@imperial.ac.uk http://orcid.org/0000-0002-2538-7374 Department of Civil and Environmental Engineering, Imperial Colle...

Productivity in Multi-storey Mass Timber Construction - Final_Report_PRA427-1617
https://www.fwpa.com.au/images/marketaccess/2019/F... [Markets] [Report]
Perry Forsythe, Alireza Ahmadian Fard Fini
The aim of this project was to quantitatively measure the onsite installation productivity of Cross Laminated Timber in multi-storey building projects. Multi-storey CLT buildings are relatively new to Australia and so an in-depth case study of a specific building project was the chosen method of undertaking the research. Time-lapse photography was used to gather site assembly information and the resulting footage was converted into quantitative data including the number of worker hours and crane...

Taller Wood Buildings and Fire Safety - Existing Evidence about Large Wood Construction
https://www.ufv.ca/media/assets/criminal-justice-r... [Fire Performance] [Report] 2013
Paul Maxim, Darryl Plecas, Len Garis, Joseph Clare
Recently, Vancouver architect, Michael Green, issued a report entitled Tall Wood, arguing that skyscrapers and other tall buildings should use more wood as a primary construction material. His argument is that wood is up to the task, is less polluting, and is more environmentally sustainable than the materials currently used. Green’s (2012) buildings would employ “massive timber” elements such as cross laminated timber, laminated strand lumber, and laminated veneer lumber. Green is not suggestin...

Picture frame and diagonal compression testing of cross-laminated timber
https://link.springer.com/content/pdf/10.1617%2Fs1... [Mechanical Performance] [Journal Article] 2019
Jonas Turesson, Anders Björnfot, Sven Berg, Mats Ekevad, Roberto Tomasi
Currently, no appropriate standard exists that describes how to determine the in-plane shear stiffness for cross-laminated timber (CLT) panels, meaning that, there is a lack of appropriate and reliable test methods. In this paper, two gross shear test methods are evaluated: a picture frame test and a diagonal compression test, which are intended to measure the shear stiffness of a whole CLT panel. This evaluation aimed to compare the shear modulus, the amount of compression/tension in the diagon...

Wood tensile strength at temperatures and moisture contents simulating fire conditions
https://www.researchgate.net/publication/225238935... [Fire Performance] [Journal Article] 1985
Birgit Östman
The immediate tensile strength parameters for spruce parallel to the grain and for hardboard have been determined at equilibrium conditions at temperatures up to 250C. Below 100C the moisture content has been varied between 0 and 30%. Above 100C dry samples have been studied. An increase in moisture content up to about 12% leads to a slight increase in the tensile strength of spruce whereas the modulus of elasticity remains constant. With a further increase in moisture content, both properties d...

Analytical, numerical and experimental assessment of vibration performance in timber floors
https://www.researchgate.net/publication/325379582... [Vibration/Acoustic Performance] [Journal Article] 2018
Daniele Casagrande, Ivan Giongo, Federico Pederzolli, Alessandro Franciosi, Maurizio Piazza
he assessment of the dynamic properties and vibration performance of two full-scale timber floor specimens is presented. The specimen set comprised a Timber-Concrete Composite floor and a Cross Laminated Timber floor. The floors, which are characterized by the same length and mass, are located in two separate five-storey timber buildings constructed in the urban area of Trento (Italy). The assessment was conducted by adopting analytical and numerical methods as well as by performing onsite exper...

Production and In-Plane Compression Mechanics of Alternatively Angled Layered Cross-Laminated Timber
https://ojs.cnr.ncsu.edu/index.php/BioRes/article/... [Alternative/Hybrid Configurations] [Journal Article] 2018
Dietrich Buck, Olle Hagman
ncreasing awareness of sustainable building materials has led to interest in enhancing the structural performance of engineered wood products. This paper reports mechanical properties of cross-laminated timber (CLT) panels constructed with layers angled in an alternative configuration on a modified industrial CLT production line. Timber lamellae were adhesively bonded together in a single-step press procedure to form CLT panels. Transverse layers were laid at an angle of 45°, instead of the conv...

Connections for Stackable Heavy Timber Modules in Midrise to Tall Wood Buildings
http://team.sites.olt.ubc.ca/files/2019/04/TEAM-Re... [Connectors] [Report] 2019
Chao (Tom) Zhang, George Lee, Frank Lam
In Phase I (2018-19) of this project on Prefabricated Heavy Timber Modular Construction, three major types of connections used in a stackable modular building were studied: intramodule connection, inter-module vertical connection, and inter-module horizontal connection. The load requirement and major design criteria were identified. The connections were designed and tested to quantify their performance. Conventional methods to build timber modules based on platform construction may not be most s...

Analytical Methods for Determining Fire Resistance of Timber Members
https://link.springer.com/content/pdf/10.1007%2F97... [Fire Performance] [Book/Book Section] 2016
Robert H White
The fire resistance ratings of wood members and assemblies, as with other materials, have traditionally been obtained by testing the assembly in a furnace in accordance with ASTM International (ASTM) Standard E119 “Standard test methods for fire tests of building construction and materials”, International Organization for Standardization (ISO) Standard 834 “Fire-resistance tests-Elements of building construction”, and similar standards. In the U.S., these ratings are published in listings, such ...

Strength and Stability of Cross-Laminated-Timber Walls at Short and Long Term
https://pastel.archives-ouvertes.fr/tel-02003154/d... [Moisture/Durability] [Thesis/Dissertation] 2017
Olivier Perret
Cross Laminated Timber (CLT) is a wooden product which derives from the Tripli in France which consists of three wooden layers where the internal layer is oriented in the cross direction. In the early 1990s, the Tripli becomes popular again in Austria and Germany and was extended to various configuration and was called (Stürzenbecher et al., 2012). It consists in several lumber layers stacked crosswise and glued on their wide faces (Figure 1). There are several configurations of CLT from 3 to 11...

Monitoring Moisture Performance of Cross-Laminated Timber Building Elements during Construction
https://www.mdpi.com/2075-5309/9/6/144... [Moisture/Durability] [Journal Article] 2019
Evan Schmidt, Mariapaola Riggio
There are currently no standards regulating water management for mass timber elements during construction, little knowledge of impacts of moisture exposure (wetting and drying performance, dimensional stability, checking), and few precedents serving as guidelines for monitoring moisture response of mass timber. To address these gaps, a hygrothermal monitoring study was devised to track moisture performance of U.S. made cross laminated timber (CLT) and glulam at a three-story mass timber building...

Bending and Shear Stiffness of Cross-Laminated Timber Using a Variable Span Bending Test
https://compass.astm.org/DIGITAL_LIBRARY/JOURNALS/... [Mechanical Performance] [Journal Article] 2018
Daniel P. Hindman, John C. Bouldin
Cross-laminated timber (CLT) is a novel wood product composed of lumber layers adhered orthogonally to create a two-way composite plate. The orthogonal orientation of the layers creates bending stiffness in both in-plane directions. However, compared to a solid wood beam, the orthogonal orientation of CLT reduces the shear stiffness in the longitudinal direction. Compared to a solid wood beam of the same material, shear deformation in CLT increases by approximately 30 %. Test methods to evaluate...

Feasilibity of Using Poplar as Cross Layer to Fabricate Cross-Laminated Timber
https://www.researchgate.net/publication/286033936... [Raw Materials] [Conference Paper] 2014
Zhiqiang Wang, Hongmei Fu, Ying-Hei Chui, Meng Gong
The feasibility of using poplar (Populus euramericana cv. I-214) as cross layer to fabricate cross-laminated timber (CLT) was examined in this study. For comparison purpose, Douglas fir (Pseudotsuga menziesii) and Monterey pine (Pinus radiata D．Don) were used as well to produce five layups of CLT panels. The mechanical properties tested included the bending strength in the major direction, modulus of elasticity in the major direction, shear strength parallel to the major direction and shear stre...

Improving the utility, performance, and durability of wood- and bio-based composites
https://link.springer.com/content/pdf/10.1007%2Fs1... [Moisture/Durability] [Journal Article] 2017
J.E. Winandy, J.J. Morrell
This paper briefly reviews the state of the art in various types of wood-and bio-based composites, summarizes recent advances, and then discusses future possibilities for improving the durability of wood-and bio-based composites....

Trail-blazing what’s possible with wood: 4 made in America mass timber projects
https://www.thinkwood.com/news/trail-blazing-whats... [Case Study/Projects] [Web Page] 2019
Think Wood
Mass timber buildings are definitely on the rise in the US. Evolving codes and the increasing availability of mass timber is inspiring firms to research and invest in ambitious mass timber viability projects....