Skip header and navigation

6 records – page 1 of 1.

Design of Multiple Bolted Connections for Laminated Veneer Lumber

https://research.thinkwood.com/en/permalink/catalogue252
Year of Publication
2014
Topic
Connections
Design and Systems
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Author
Yeh, Borjen
Rammer, Douglas
Linville, Jeff
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Topic
Connections
Design and Systems
Keywords
National Design Specifications for Wood Construction (NDSR)
Failure Modes
Bolted Connection
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The design of multiple bolted connections in accordance with Appendix E of the National Design Specification for Wood Construction (NDS) has incorporated provisions for evaluating localized member failure modes of row and group tear-out when the connections are closely spaced. Originally based on structural glued laminated timber (glulam) members made with all L1 Douglas fir-Larch laminating lumber, the NDS provisions were confirmed by additional analysis, which indicates the applicability of the provisions to glulam with reduced design shear values. Due to the similarity to glulam in the grain orientation and layup strategy, laminated veneer lumber (LVL) is subject to similar failure modes. As a result, a study was initiated by APA – The Engineered Wood Association and the LVL industry, in collaboration with the Forest Products Laboratory (FPL) of the U.S. Department of Agriculture (USDA) to evaluate if a reduced design shear stress is necessary for LVL under similar multiple bolted connection configurations. This paper describes the test results obtained from the study, which indicate that an adequate load factor exists for LVL multiple bolted connections without a reduction in the LVL design shear stress when designed in accordance with Appendix E of the NDS.
Online Access
Free
Resource Link
Less detail

Effect of Holes on the Structural Capacities of Laminated Veneer Lumber

https://research.thinkwood.com/en/permalink/catalogue2045
Year of Publication
2018
Topic
Mechanical Properties
Material
LVL (Laminated Veneer Lumber)

Evaluation of Fire-Retardant Treated Laminated Veneer Lumber

https://research.thinkwood.com/en/permalink/catalogue2471
Year of Publication
2020
Topic
Fire
Mechanical Properties
Material
LVL (Laminated Veneer Lumber)

Evaluation of Fire-Retardant Treated Laminated Veneer Lumber: Final Report — Part 1 of 2

https://research.thinkwood.com/en/permalink/catalogue2502
Year of Publication
2020
Topic
Fire
Mechanical Properties
Material
LVL (Laminated Veneer Lumber)
Application
Wood Building Systems

Evaluation of Fire-Retardant Treated Structural Glued Laminated Timber: Final Report - Part 2 of 2

https://research.thinkwood.com/en/permalink/catalogue2590
Year of Publication
2020
Topic
Fire
Material
Glulam (Glue-Laminated Timber)
Author
Yeh, Borjen
Chen, Jessie
Zelinka, Sam
Organization
APA – The Engineered Wood Association
Year of Publication
2020
Country of Publication
United States
Format
Report
Material
Glulam (Glue-Laminated Timber)
Topic
Fire
Keywords
Fire-Retardant-Treatment (FRT)
Hygrothermal
Structural
Language
English
Research Status
Complete
Summary
This report contains test results for the fire-retardant-treatment (FRT) and hygrothermal effects on structural glued laminated timber (glulam). This is the second part of the collaborative research project between ABA - The Engineered Wood Association, Tacoma, WA, and USDA Forest Products Laboratory (FPL), Madison, WI. The first part of this project is related to FRT laminated veneer lumber (LVL) and the results are provided in a separate research report. Selected mechanical properties, including tension, bending, and shear of the FRT glulam treated with the American Wood Protection ASsociation (AWPA) P49 and P50 fire retardants were evaluated in this study. These results are used to support the development of an ASTM standard for FRT glulam.
Online Access
Free
Resource Link
Less detail

The North American Product Standard for Cross-Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue760
Year of Publication
2012
Topic
Market and Adoption
Material
CLT (Cross-Laminated Timber)
Author
Yeh, Borjen
Gagnon, Sylvain
Williamson, Tom
Pirvu, Ciprian
Lum, Conroy
Kretschmann, David
Publisher
Forest Products Society
Year of Publication
2012
Country of Publication
United States
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Market and Adoption
Keywords
International Building Code
North America
Standards
Language
English
Research Status
Complete
Series
Wood Design Focus
Summary
Cross-laminated timber (CLT) is a prefabricated solid engineered wood product made of at least three orthogonally bonded layers of solid-sawn lumber or structural composite lumber that are laminated by gluing of longitudinal and transverse layers with structural adhesives to form a solid rectangular-shaped, straight, and plane timber intended for roof, floor, or wall applications. While this engineered wood product has been used in Europe for over 15 years, the production of CLT and design of CLT structural systems have just begun in North America. For the acceptance of new construction materials or systems in North America, such as CLT, a consensus-based product standard is essential to the designers and regulatory bodies. This paper describes and documents the background information and some key issues that were considered during the development of the ANSI/APA PRG 320 Standard for Performance-Rated Cross Laminated Timber. This standard was developed based on the consensus standard development process of APA-The Engineered Wood Association as a standards developer accredited by the American National Standards lnstitute (ANSI). The CLT stress classes incorporated in this product standard are also discussed. The ANSI/APA PRG 320 standard has been approved by the Structural Committee of the lnternational Code Council (lCC) for the 20'15 lnternational Building Code (lBC).
Online Access
Free
Resource Link
Less detail

6 records – page 1 of 1.