Modeling Effects of Incising on Flexural Properties of Green Douglas Fir and Western Hemlock Lumber

Jerrold E Winandy; Butch Bernhardt; Dallin Brooks; Arijit Sinha; Jeffrey J Morrell

doi:10.1520/JTE20200308

Back

Modeling Effects of Incising on Flexural Properties of Green Douglas Fir and Western Hemlock Lumber

Journal article

Open access

Peer reviewed

Modeling Effects of Incising on Flexural Properties of Green Douglas Fir and Western Hemlock Lumber

Jerrold E Winandy, Butch Bernhardt, Dallin Brooks, Arijit Sinha and Jeffrey J Morrell

Journal of Testing and Evaluation, Vol.49(6), pp.1-12

2021

DOI: https://doi.org/10.1520/JTE20200308

Files and links (2)

pdf

Modeling Effects of Incising on Flexural Properties of Green Douglas Fir and Western Hemlock Lumber1.17 MBDownload View

Submitted Version Open Access

url

https://doi.org/10.1520/JTE20200308View

Published Version

Abstract

Douglas fir

lumber

western hemlock

strength effects

flexural properties

incising

Incising is required in Canadian and US national standards for the treatment of many timber species, especially those from western North America. Incising increases the amount of end-grain exposed to fluid flow, but it also decreases the cross-sectional area and, thus, has the potential to affect mechanical properties. Models have been developed to predict the effects of incising on flexural properties, but correlative data for engineering design adjustment factor(s) for incised and preservative treated lumber and timber are lacking. Current engineering design adjustment factors are primarily based on nominal 2x (38-mm, 1.5-in)-thick lumber tests. In 2018, this fact was recognized and the new design standard allowed for theoretical models to be used for larger materials where appropriate test data were not currently available. This article reports the results of mechanical tests evaluating the effects of incising on flexural properties of nominal 3x and 4x (64- and 89-mm)-thick by 184-mm (7.25-in)-wide Douglas fir and western hemlock lumber. It uses these data to develop potential engineering design adjustment factor(s) for incised nominal 2x (64- and 89-mm)-thick lumber and discusses theoretical modeling to predict those factors.

Details

Title: Modeling Effects of Incising on Flexural Properties of Green Douglas Fir and Western Hemlock Lumber
Authors: Jerrold E Winandy (Author) - University of Minnesota
Butch Bernhardt (Author) - Western Wood Preservers Institute
Dallin Brooks (Author) - Western Wood Preservers Institute
Arijit Sinha (Author) - Oregon State University
Jeffrey J Morrell (Author) - University of the Sunshine Coast, Queensland, National Centre for Timber Durability and Design Life
Publication details: Journal of Testing and Evaluation, Vol.49(6), pp.1-12
Publisher: A S T M International
Date published: 2021
DOI: 10.1520/JTE20200308
ISSN: 1945-7553; 0090-3973
Copyright note: This is a preprint of an article published in Journal of Testing and Evaluation, Copyright @ 2021, ASTM International, West Conshohocken, PA, DOI: 10.1520/JTE20200308, pp.1-12, www.astm.org
Organisation Unit: University of the Sunshine Coast, Queensland; National Centre for Timber Durability and Design Life; Forest Research Institute
Language: English
Record Identifier: 99495707302621
Output Type: Journal article

Metrics

166 File views/ downloads

33 Record Views

3 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Materials Science, Characterization & Testing