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Natural Durability of Timber Exposed Above Ground–a Survey

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Brischke, C., Meyer, L., Alfredsen, G., Humar, M., Francis, L. P., Flæte, P.-O. and Larsson-Brelid, P. (2013) Natural Durability of Timber Exposed Above Ground–a Survey. Drvna industrija, 64 (2). pp. 113-129. ISSN 0012-6772


Article Link: http://dx.doi.org/doi:10.5552/drind.2013.1221


Besides its inherent resistance against degrading organisms, the durability of timber is infl uenced by design details and climatic conditions, making it diffi cult to treat wood durability as an absolute value. Durability classifi cation is, therefore, based on comparing performance indicators between the timber in question and a reference timber. These relative values are grouped and related to durability classes, which can refer to a high range of service-lives. The insuffi cient comparability of such durability records has turned out to be a key challenge for service-life prediction. This paper reviewed literature data, based on service-life measures, not masked by a durability classifi cation. It focused on natural durability of timber tested in the fi eld above-ground. Additionally, results from ongoing aboveground durability studies in Europe and Australia are presented and have been used for further analysis. In total, 163 durability recordings from 31 different test sites worldwide based on ten different test methods have been considered for calculation of resistance factors. The datasets were heterogeneous in quality and quantity; the resulting resistance factors suffered from high variation. In conclusion, an open platform for scientifi c exchange is needed to increase the amount of available service-life related data.

Item Type:Article
Business groups:Horticulture and Forestry Science
Keywords:Durability classes Field tests Resistance factor Service life prediction Test methodology Use class 3 Field test Resistance factors Benchmarking Testing Timber Durability aboveground biomass climate conditions data set literature review Australia Europe
Subjects:Forestry > Research. Experimentation
Live Archive:04 Sep 2013 00:12
Last Modified:10 Jul 2023 00:56

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