Decay Hazard (Scheffer) Index Values in Korea for Exterior Aboveground Wood

Kim, Taegyun; Ra, Ji-Eun

doi:10.13073/fpj-d-13-00033

Cited by 11 publications

(4 citation statements)

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“…Jinju was considered as a moderate decay zone according to Scheffer index (Kim et al, 2011;Kim and Ra, 2013;Kim and Ra, 2014). The Scheffer index of Jinju determined in 10 years is shown in were already replaced because of severe decay.…”

Section: Resultsmentioning

confidence: 99%

Ten-Year Performance of Shell-Treated Wooden Deck

Ra¹

2019

Journal of the Korean Wood Science and Technology

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The performance of a wooden deck made of refractory materials that have difficulties in achieving target penetrations as stipulated in the specification and quality standards for treated wood in Korea, was assessed via a case study in this research. A wooden deck built in Jinju in 2009 was selected for this study because of its fabrication method using pressure and treated refractory materials. The penetration and retention analysis did not satisfy the domestic standard for treated wood. Inspection of the deck in 2019 revealed that the deck had been attacked by decay fungi. Cap rails showed much deeper and wider checking on their surface compared with the top and base rails, resulting in a severe fungal attack. The decking boards exhibited severe fungal decay primarily in the end parts. However, the rails and balusters without checks and posts were virtually free of fungal attack irrespective of the preservative penetration measures.Copper content in the soil 5 cm away from the deck was less than 150 mg/kg, implying that copper movement in the soil was very limited. These results suggest that the inhibition of surface propagation and the protection of end surfaces are essential factors in increasing the longevity of treated wooden decks; further, the results also showed that the deck was within an acceptable range from the point of copper contamination.

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Section: Resultsmentioning

confidence: 99%

Ten-Year Performance of Shell-Treated Wooden Deck

Ra¹

2019

Journal of the Korean Wood Science and Technology

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“…The soil was noted to be between clay and sandy soil with good natural drainage (Wang et al 2014). The site experiences hot summers and cold winters with a Scheffer Index of 58 (Kim et al 2011). It also hosts a population of Japanese subterranean termites (R. speratus).…”

Section: Field Test Sitesmentioning

confidence: 99%

Field Performance of Refractory Softwoods Treated with CA or ACQ after 10 Years of Exposure in Korea and Canada

Stirling¹,

Ra²,

Ryu³

et al. 2022

Forest Products Journal

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Korean wood preservation standards require deep penetration, which precludes the use of many refractory species. However, such treatments of refractory species have been shown to be effective in other parts of the world. A field test was therefore initiated to evaluate the performance of western hemlock, a moderately refractory species, and white spruce, a highly refractory species, pressure treated with either copper azole or alkaline copper quaternary under Korean field conditions that included both decay and termite hazards. After 10 years of exposure in a ground proximity and field stake test in Jinju, Korea, the treated materials remained largely sound, while untreated controls failed much earlier, largely due to termite attack. These data suggest that material that does not meet current Korean penetration requirements could still provide effective protection against biodegradation under Korean conditions. Decay was more advanced in matched treated stakes exposed at a test site in Canada than at the site in Korea.

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“…Corresponding climate index maps were prepared for other application fields and/or locations following Scheffer's concept, e.g. a hazard map for the contiguous United States presented in the Wood Handbook by Forest Products Laboratory [ 19 ], in Canada [ 20 ], decay hazard classification for exterior aboveground wood in China [ 21 ], exterior aboveground wood in Korea [ 22 ], and in Switzerland [ 12 ]. The potential risk of wood decay in Norway was studied using the present and predicted climate data.…”

Section: Introductionmentioning

confidence: 99%