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An Innovative Method Based on Grain Angle Measurement to Sort Veneer and Predict Mechanical Properties of Beech Laminated Veneer Lumber

https://research.thinkwood.com/en/permalink/catalogue1286
Year of Publication
2018
Topic
Mechanical Properties
Material
LVL (Laminated Veneer Lumber)
Author
Viguier, Joffrey
Bourgeay, Christophe
Rohumaa, Anti
Pot, Guillaume
Denaud, Louis
Publisher
ScienceDirect
Year of Publication
2018
Format
Journal Article
Material
LVL (Laminated Veneer Lumber)
Topic
Mechanical Properties
Keywords
Modulus of Elasticity
Beech
Grain Angle
Grading
Density
Research Status
Complete
Series
Construction and Building Materials
Summary
Cross-Laminated Timber (CLT) structures exhibit satisfactory performance under seismic conditions. This ispossible because of the high strength-to-weight ratio and in-plane stiffness of the CLT panels, and the capacity ofconnections to resist the loads with ductile deformations and limited impairment of strength. This study sum-marises a part of the activities conducted by the Working Group 2 of COST Action FP1402, by presenting an in-depth review of the research works that have analysed the seismic behaviour of CLT structural systems. Thefirstpart of the paper discusses the outcomes of the testing programmes carried out in the lastfifteen years anddescribes the modelling strategies recommended in the literature. The second part of the paper introduces theq-behaviour factor of CLT structures and provides capacity-based principles for their seismic design.
Online Access
Free
Resource Link
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Key Mechanical Properties of Cross-banded Laminated Veneer Lumbers Manufactured from Blending Spotted Gum and Hoop Pine Veneers

https://research.thinkwood.com/en/permalink/catalogue2490
Year of Publication
2019
Topic
Mechanical Properties
Material
LVL (Laminated Veneer Lumber)
Application
Wood Building Systems

Mechanical Properties of Glued-Laminated Timber with Different Assembly Patterns

https://research.thinkwood.com/en/permalink/catalogue2430
Year of Publication
2019
Topic
Mechanical Properties
Design and Systems
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Wood Building Systems

A Path Towards Cost Effective Production of Hardwood CLT

https://research.thinkwood.com/en/permalink/catalogue3184
Year of Publication
2022
Topic
Mechanical Properties
Market and Adoption
Material
CLT (Cross-Laminated Timber)
Organization
Virginia Polytechnic Institute and State University
Year of Publication
2022
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Market and Adoption
Keywords
Hardwood
Lumber Grading
Cost/Benefit Analysis
Research Status
In Progress
Notes
Forest Service/USDA Wood Innovations Grants Recipient Point of Contact: Daniel Hindman Location: Blacksburg, Virginia
Summary
The purpose of this project is to advance the use of hardwoods in cross-laminated timber (CLT) by developing optimal production methods for hardwood lumber producers and CLT manufacturers. Currently, there is a misalignment between typical hardwood lumber production (i.e. sizes, grades, and moisture content) and the raw material needs of CLT manufacturers. Both Virginia Tech (VT) and West Virginia University (WVU) have studied hardwood CLT production, but approached it in fundamentally different ways. At VT, the lumber for producing hardwood CLT was manufactured and graded using the rules established by the American Lumber Standards Committee (ALSC) for structural lumber; however, no hardwood sawmills currently produce lumber to these standards. At WVU, hardwood CLTs were produced using lumber that was manufactured and graded according to the National Hardwood Lumber Association (NHLA) grading rules and dimensions such as 4/4 lumber; NHLA grading is for appearance and is not related to strength or mechanical property data. Each method has advantages and challenges. This project is novel in the demonstration of these two production methods for hardwood CLT. Hardwood lumber will be graded and processed according to both the VT and WVU methods, and hardwood CLTs will be produced, then evaluated for mechanical properties. A cost/benefit analysis will be conducted to formulate best practices for the hardwood lumber and CLT industries. Outcomes of this project include a better understanding of the required/desired characteristics of hardwood lumber intended for CLT manufacture, leading to increased hardwood utilization which supports the economies of rural communities and forest ecosystem restoration. This project is a cooperative effort between VT and WVU combining their expertise in hardwood manufacturing, lumber grading, mechanical testing and knowledge of the CLT industry.
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