Properties of aging pentachlorophenol-treated douglas-fir crossarms

Christoph F Schauwecker; Milo Clauson; Matthew J Konkler; Arijit Sinha; Jeffrey Morrell

doi:10.13073/FPJ-D-20-00025

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Properties of aging pentachlorophenol-treated douglas-fir crossarms

Journal article

Peer reviewed

Properties of aging pentachlorophenol-treated douglas-fir crossarms

Christoph F Schauwecker, Milo Clauson, Matthew J Konkler, Arijit Sinha and Jeffrey Morrell

Forest Products Journal, Vol.70(3), pp.364-369

2020

DOI: https://doi.org/10.13073/FPJ-D-20-00025

Appears in UniSC Diversity and Inclusion Research Collection

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Abstract

Acoustic tomography

stress waves

decayed wood

UniSC Diversity Area - Life Stages

Wooden crossarms play a major role in supporting electric distribution lines in North America, but relatively few data exist on their condition as they age. The residual capacity of Douglas-fir crossarms in service in western Oregon for 45 to 60 years was investigated. Arms were sampled for residual preservative retention, the presence of visible decay fungi, and residual flexural properties; these results were then compared with three nondestructive tools. A majority of the arms tested had preservative levels well below those required for new arms, but only one decay fungus was isolated, and only five arms removed and dissected had any evidence of visible internal decay. Moduli of rupture for the arms were generally below the minimum levels required by national standards, but most still retained at least 67 percent of this value. Nondestructive evaluation tools were generally poorly correlated with flexural properties, possibly because of the heavily weathered and checked exterior condition.

Details

Title: Properties of aging pentachlorophenol-treated douglas-fir crossarms
Authors: Christoph F Schauwecker (Author) - Arclin Inc.
Milo Clauson (Author) - Oregon State University
Matthew J Konkler (Author) - Oregon State University
Arijit Sinha (Author) - Oregon State University
Jeffrey Morrell (Author) - University of the Sunshine Coast, Queensland, National Centre for Timber Durability and Design Life
Publication details: Forest Products Journal, Vol.70(3), pp.364-369
Publisher: Forest Products Society
Date published: 2020
DOI: 10.13073/FPJ-D-20-00025
ISSN: 2376-9637
Organisation Unit: Forest Research Institute; University of the Sunshine Coast, Queensland; National Centre for Timber Durability and Design Life
Language: English
Record Identifier: 99489007702621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Forestry; Materials Science, Paper & Wood