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10 records – page 1 of 1.

Performance of Wood Adhesive for Cross Laminated Timber Under Elevated Temperatures

https://research.thinkwood.com/en/permalink/catalogue1831
Year of Publication
2018
Topic
Mechanical Properties
Fire
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems

Charring Behavior of Structural Timber Elements in Full-Scale Fire Tests of Three Story Timber School Buildings

https://research.thinkwood.com/en/permalink/catalogue1706
Year of Publication
2016
Topic
Fire
Material
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Author
Suzuki, Jun-ichi
Kaku, Chihiro
Naruse, Tomohiro
Kagiya, Koji
Noboru, Yasui
Itagaki, Naoyuki
Izumi, Jun-ichi
Seki, Mariko
Kaku, Teruhiko
Hasemi, Yuji
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Topic
Fire
Keywords
Charring Rate
Delamination
Full Scale
Fire Test
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4437-4446
Summary
The charring behavior of timber structural elements, such as the charring rate of timber elements and delamination of glue-laminated timber, affects the structural stability of timber buildings. The charring rate of timber elements varies depending on the severity of fire exposure. However, charring rates have been ordinarily investigated in...
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Finite Element Modelling of Heat and Moisture Transfer through Cross Laminated Timber Panels

https://research.thinkwood.com/en/permalink/catalogue2414
Year of Publication
2019
Topic
Moisture
Fire
Material
CLT (Cross-Laminated Timber)
LSL (Laminated Strand Lumber)
Application
Wood Building Systems
Walls

Assessment of Connections in Cross-Laminated Timber Buildings Regarding Structural Robustness

https://research.thinkwood.com/en/permalink/catalogue1948
Year of Publication
2018
Topic
Connections
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems

Structural Analysis of CLT Multi-Storey Buildings Assembled with the Innovative X-RAD Connection System: Case-Study of a Tall-Building

https://research.thinkwood.com/en/permalink/catalogue1787
Year of Publication
2016
Topic
Connections
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Polastri, Andrea
Giongo, Ivan
Pacchioli, Stefano
Piazza, Maurizio
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Connections
Mechanical Properties
Keywords
Multi-Storey
X-RAD
Fully Threaded Screws
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 5868-5877
Summary
The cross laminated timber (CLT) technology is nowadays a well-known construction system, which that can be applied to several typologies of residential and commercial buildings. However some critical issues exist which limit the full development of the CLT construction technology: problems in handling, difficulty in assembling...
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Enhancing Thermal and Mechanical Performance of Engineered Wood Product Adhesives using Novel Fire Retardant Nanoclays

https://research.thinkwood.com/en/permalink/catalogue2810
Year of Publication
2021
Topic
Mechanical Properties
Fire
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Oguzlu-Baldelli, Hale
Yu, Jason
Lee, George
Lam, Frank
Jiang, Feng
Organization
University of British Columbia
Year of Publication
2021
Country of Publication
Canada
Format
Report
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Mechanical Properties
Fire
Keywords
Adhesive
PUR
Bond Strength
Halloysite
pMDI
Douglas-Fir
SPF
Bonding Shear Strength
Language
English
Research Status
Complete
Summary
One component PUR adhesive is widely used in engineered wood products applications, such as cross-laminated timber (CLT). However, the dramatic deterioration of PUR adhesive bond strength at elevated temperature can out tremendously threat for tall wood building, especially under fire. In this project, we are aiming to improving the bond strength of the PUR adhesive at high temperature by incorporating chemically modified halloysite to improve the poor interface between inorganic fillers and the polymer matrices. To improve the interaction with PUR (Loctite UR20 by Henkel®), the halloysite was chemically grafted with polymeric diphenylmethane diisocyanate (pMDI) (pMDI-H). The effect of adding pMDI modified halloysite to the PUR adhesives was investigated in terms of nanofiller dispersibility, thermal and mechanical properties of the pMDI-halloysite-PUR composite film, and the bonding shear strength of the glued Douglas fir and Spruce-Pine-Fir (SPF) shear blocks under different temperature. Significant improvement of the bond shear strength can be observed with the addition of 5 and 10% of pMDI-modified PUR adhesive, and the key research findings are summarized as below, a. pMDI can be successfully grafted onto hydroxylated halloysites to improve its dispersibility in one-component PUR adhesive; b. Addition of pMDI-H into PUR adhesive can lead to improved glass transition temperature and storage modulus. In contrast, no significant enhancement was observed in h-H added PUR films due to the poor dispersibility; c. Addition of up to 10% h-H and pMDI-H did not show significant change of the shear strength at 20 °C for both Douglas Fir and SPF; d. Significant enhancement of shear strength at elevated temperature (60-100 °C) can be observed for 5% and 10% pMDI-H modified PUR adhesive, showing 17% improvement for Douglas Fir and 27-37% for SPF.
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Solutions for Upper Mid-Rise and High-Rise Mass Timber Construction: Fire Resistance of Mass Timber Laminated Elements

https://research.thinkwood.com/en/permalink/catalogue2088
Year of Publication
2019
Topic
Fire
Application
Walls
Floors
Wood Building Systems
Author
Ranger, Lindsay
Dagenais, Christian
Bénichou, Noureddine
Organization
FPInnovations
Year of Publication
2019
Country of Publication
Canada
Format
Report
Application
Walls
Floors
Wood Building Systems
Topic
Fire
Keywords
Fire Resistance
Mid-Rise
High-Rise
Charring
Language
English
Research Status
Complete
Summary
This project assesses the fire resistance of laminated timber structural systems as wall and floor assemblies. Full-scale tests were conducted to assess structural fire resistance and charring behaviour. This research could be used to expand current fire design provisions and support inclusion of these types of assemblies into Annex B of CSA O86.
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Fire Protection of Light and Massive Timber Elements using Gypsum Plasterboards and Wood Based Panels: A Large-Scale Compartment Fire Test

https://research.thinkwood.com/en/permalink/catalogue194
Year of Publication
2014
Topic
Fire
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Author
Kolaitis, Dionysios
Asimakopoulou, Eleni
Founti, Maria
Publisher
ScienceDirect
Year of Publication
2014
Country of Publication
Netherlands
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Topic
Fire
Keywords
Failure
Full Scale
Gypsum
Compartment Fire Test
Language
English
Research Status
Complete
Series
Construction and Building Materials
Notes
https://doi.org/10.1016/j.conbuildmat.2014.09.027
Summary
A full-scale compartment fire test was performed to assess gypsum plasterboards and wood based panels as cladding materials for the fire protection of light and massive timber elements. The test compartment was constructed using both the Timber Frame and the Cross Laminated Timber techniques; a wood crib was used to achieve realistic fire conditions. Temperature measurements and optical inspection evidence suggested that gypsum plasterboards offered adequate fire protection since they did not fail and no charring was observed in the timber elements. A free standing wall inside the test compartment, protected by wood-based panels, partially collapsed. Measured values of characteristic failure times, such as time to failure of fire protection cladding and time to onset of charring, were compared to relevant Eurocode correlations, achieving good levels of agreement. The obtained set of measurements, describing the time evolution of a large variety of physical parameters, such as gas and wall layer temperatures, can be used for validation of relevant advanced fire simulation tools.
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Solutions for Upper Mid-Rise and High-Rise Mass Timber Construction: Rehabilitation of Mass Timber Following Fire and Sprinkler Activation

https://research.thinkwood.com/en/permalink/catalogue2089
Year of Publication
2019
Topic
Fire
Moisture
Application
Wood Building Systems
Author
Ranger, Lindsay
Organization
FPInnovations
Year of Publication
2019
Country of Publication
Canada
Format
Report
Application
Wood Building Systems
Topic
Fire
Moisture
Keywords
Mid-Rise
High-Rise
Damage
Repairs
Sprinklers
Language
English
Research Status
Complete
Summary
The intent of this project is to research evaluation and rehabilitation methods that are applicable to mass timber structures following a fire. This includes addressing both fire damage and water damage from sprinkler activation and/or the use of firefighting hoses. This report provides an overview of the type of damage that might be expected following a fire and methods that might reduce potential damage (including design elements and firefighting tactics). Current and existing rehabilitation methods for wood construction will be reviewed and their applicability to mass timber structures will be discussed. This includes the ability to conduct condition assessments and repairs on building elements that can be done in place. The overall objective is to reduce uncertainty related to mass timber construction, which ultimately would allow for more accurate risk evaluation by insurance companies.
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Free
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Fire Behavior Of Next Generation Of Cross-Laminated Timber: CLT Manufactured With SCL And Hardwood

https://research.thinkwood.com/en/permalink/catalogue371
Year of Publication
2016
Topic
Fire
Material
CLT (Cross-Laminated Timber)
LVL (Laminated Veneer Lumber)
LSL (Laminated Strand Lumber)
Application
Wood Building Systems
Author
Dagenais, Christian
Grandmont, Jean-Frédéric
Hasburgh, Laura
Organization
FPInnovations
Year of Publication
2016
Country of Publication
Canada
Format
Report
Material
CLT (Cross-Laminated Timber)
LVL (Laminated Veneer Lumber)
LSL (Laminated Strand Lumber)
Application
Wood Building Systems
Topic
Fire
Keywords
Aspen
Fire Behaviour
Charring Rate
ANSI/APA PRG-320
Manufacturing Parameters
Language
English
Research Status
Complete
Summary
The objective of this study is to evaluate the fire behavior of CLT manufactured with different types of SCL or lumber boards, namely with laminated veneer lumber (LVL), laminated strand lumber (LSL) and Trembling Aspen. The fire test data is also compared to those of CLT manufactured in accordance with ANSI/APA PRG-320 using solid-sawn lumber grades. More specifically, the study aims at evaluating the charring rates of this new generation of CLT panels as well as the impact of their manufacturing parameters.
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10 records – page 1 of 1.