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11 records – page 1 of 2.

Acoustic Impact Testing and Waveform Analysis for Damage Detection in Glued Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue771
Year of Publication
2017
Topic
Acoustics and Vibration
Serviceability
Material
Glulam (Glue-Laminated Timber)
Application
General Application

Effectiveness of Several NDE Technologies in Detecting Moisture Pockets and: Artificial Defects in Sawn Timber and Glulam

https://research.thinkwood.com/en/permalink/catalogue778
Year of Publication
2016
Topic
Serviceability
Material
Glulam (Glue-Laminated Timber)
Solid-sawn Heavy Timber
Application
Bridges and Spans
Author
Wacker, James
Senalik, Christopher
Wang, Xping
Jalinoos, Frank
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Solid-sawn Heavy Timber
Application
Bridges and Spans
Topic
Serviceability
Keywords
Decay
Douglas-Fir
Moisture Pockets
Non-Destructive Evaluation
Scanning
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria
Summary
Several nondestructive evaluation (NDE) technologies were studied to determine their efficacy as scanning devices to detect internal moisture and artificial decay pockets. Large bridge-sized test specimens, including sawn timber and glued-laminated timbe...
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Free
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Evaluating Decay Resistance of Mass Timber

https://research.thinkwood.com/en/permalink/catalogue718
Topic
Serviceability
Material
CLT (Cross-Laminated Timber)
Application
General Application
Organization
Forest Products Laboratory Mississippi State University
Country of Publication
United States
Material
CLT (Cross-Laminated Timber)
Application
General Application
Topic
Serviceability
Keywords
Funghi
Decay
Research Status
In Progress
Notes
Project contacts are Grant Kirker (Forest Products Laboratory), Katie Ohno (Forest Products Laboratory) and C. Elizabeth Stokes (Mississippi State University)
Summary
Outcomes anticipated from the results of this project are increased knowledge of fungal degradation applied to mass timber composite products such as CLT and the development of more targeted standardized test methodologies for testing CLT.
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Field Tests of Treated Thin-Lamina Glulam after Five Years of Exposure

https://research.thinkwood.com/en/permalink/catalogue370
Year of Publication
2015
Topic
Serviceability
Material
Glulam (Glue-Laminated Timber)
Application
Beams
General Application
Author
Morris, Paul
Ingram, Janet
Organization
FPInnovations
Year of Publication
2015
Country of Publication
Canada
Format
Report
Material
Glulam (Glue-Laminated Timber)
Application
Beams
General Application
Topic
Serviceability
Keywords
Cedar
Decay
Preservative
ACQ
Copper Azole
Fasteners
Language
English
Research Status
Complete
Summary
Field tests of untreated and preservative-treated glulam beams in outdoor exposure, in ground contact and above ground, were inspected for decay after five years. Copper azole and ACQ-D-treated material was in excellent condition, while moderate to severe decay was present in untreated non-durable material...
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Free
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High-Precision Pattern Recognition Wood Components with 3D Ultrasound

https://research.thinkwood.com/en/permalink/catalogue937
Year of Publication
2013
Topic
Mechanical Properties
Serviceability
Material
Glulam (Glue-Laminated Timber)
Solid-sawn Heavy Timber
Application
General Application

Hygrothermal Performance Of Highly Insulated Wood Frame Walls With Air Leakage: Field Measurements And Simulations

https://research.thinkwood.com/en/permalink/catalogue2316
Year of Publication
2014
Topic
Moisture
Design and Systems
Material
Light Frame (Lumber+Panels)
Application
Wood Building Systems
Walls

Identifying Incipient Decay in Douglas-fir Bridge Components using X-Ray Computerized Tomography

https://research.thinkwood.com/en/permalink/catalogue2350
Year of Publication
2019
Topic
Design and Systems
Moisture
Serviceability
Material
Glulam (Glue-Laminated Timber)
Solid-sawn Heavy Timber
Application
Bridges and Spans
Author
Senalik, Christopher
Wacker, James
Wang, Xiping
Wu, Xi
Year of Publication
2019
Country of Publication
United States
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Solid-sawn Heavy Timber
Application
Bridges and Spans
Topic
Design and Systems
Moisture
Serviceability
Keywords
X-ray Computerized Tomography
Wood Timber
Brown Rot Fungus
Incipient Decay
Language
English
Conference
International Nondestructive Testing and Evaluation of Wood Symposium
Research Status
Complete
Summary
In this report, wooden members of sizes typically used in bridge construction are examined using x-ray computerized tomography (CT) to determine the presence of internal decay. This report is part of an overall study in which Douglas-fir (Pseudotsuga menziesii) glue-laminated (glulam) beams and solid sawn timbers were inoculated with brown rot fungus, Fomitopsis pinicola, and exposed to aboveground conditions approximately 25 miles (40 km) north of Gulfport, Mississippi, USA. The goal of the overall study is to develop interior decay within the test specimens and then identify and characterize the decay using a variety of nondestructive testing (NDT) techniques. One NDT technique used is x-ray CT. The pixel brightness (PB) of CT scan images is proportional to the specific gravity (SG) at that location; high SG materials appear brighter whereas low SG materials appear darker. The consumption of wood by fungus decreases the wood SG; however, fungal progression takes place in areas where sufficient moisture is present. The presence of moisture increases wood SG as detected by the CT scan, which masks the effect of the fungal decay, which is a common co-occurrence with many NDT techniques. To identify incipient decay, it is necessary to examine the ring structure both within and outside of the area of moisture. Quantifying the extent of the decay requires correlating the PB to known SG values for both dry wood and wood of varying moisture content. In this report, the relationship between wood SG, moisture content, and PB was quantified.
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Free
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Moisture Response of Wall Assemblies of Cross-Laminated Timber Construction in Cold Canadian Climates

https://research.thinkwood.com/en/permalink/catalogue143
Year of Publication
2012
Topic
Serviceability
Moisture
Material
CLT (Cross-Laminated Timber)
Application
Walls

Nondestructive Evaluation of a 75-Year Old Glulam Arch

https://research.thinkwood.com/en/permalink/catalogue246
Year of Publication
2013
Topic
Serviceability
Material
Glulam (Glue-Laminated Timber)
Application
General Application
Author
Teder, Marko
Wang, Xiping
Year of Publication
2013
Country of Publication
United States
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
General Application
Topic
Serviceability
Keywords
Decay
Delamination
Modulus of Elasticity
Non-Destructive Evaluation
Stress Wave Timing
Wave Propagation
Strength
Resistance Micro-Drilling
Language
English
Conference
International Nondestructive Testing and Evaluation of Wood Symposium
Research Status
Complete
Notes
September 24-27, 2013, Madison, Wisconsin, USA
Online Access
Free
Resource Link
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Performance of Borate-Treated Glulam and LVL After Eight Years in an Accelerated Above-Ground Field Test

https://research.thinkwood.com/en/permalink/catalogue359
Year of Publication
2015
Topic
Serviceability
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Application
General Application
Author
Ingram, Janet
Morris, Paul
Organization
FPInnovations
Year of Publication
2015
Country of Publication
Canada
Format
Report
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Application
General Application
Topic
Serviceability
Keywords
Decay
Treated Wood
Borate
Language
English
Research Status
Complete
Summary
Glulam and laminated veneer lumber protected by a combination of treatment with borate by two processes, and a film-forming coating, were exposed outdoors in an above-ground field test using a modified post and rail test design. After eight years’ exposure, early to moderate...
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Free
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11 records – page 1 of 2.