IRG Documents Database and Compendium

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Effectiveness of "Gang-Nail" plates in preventing splitting of Eucalyptus poles and Brazilian hardwood sleepers
1984 - IRG/WP 3262
This paper presents the results of some tests carried out with an anti-splitting device, placed on the end surfaces of Eucalyptus spp utility poles and Brazilian hardwood sleepers at the beginning of an air-drying period. The type of device used, a "Gang-Nail" plate, reduces significantly the splits at the end-surface of poles, but reduces only a little the splits occurring in sleepers....
A M F Oliveira, J A C Sodré, O B Neto

A comparative study of some anti-splitting devices, using Eucalyptus saligna and hybrids of Eucalyptus saligna X Eucalyptus spp poles
1983 - IRG/WP 3251
It is commom for some Brazilian wood pole users to require devices such as banding steel, to avoid or reduce splits at the end of Eucalyptus treated poles. On other hand users and manufacturers do not have data to confirm the effectiveness of the banding steel types normally used such as galvanized "Steel-Belt" and galvanized "Wire-Belt". For this reason a comparative study was carried out includi...
F C Geraldo, J A C Sodré

Development of a method for testing wood preservatives with soft rot fungi
1975 - IRG/WP 250
Although the first publications on experimental soft rot attack date back 20 years ago, so far no test method for evaluating the efficacy of wood preservatives against soft rot attack (Ascomycetes and Fungi Imperfecti) has been generally accepted. The reasons are diverse and the shortcomings and the disadvantages of the methods described are well known and have repeatedly been discussed. The soil ...
M Gersonde, W Kerner-Gang

The degradation of wood by metal fastenings and fittings
1972 - IRG/WP 302
As well as the hazards of biological decay, timber used in boat building is subject to the effects of chemical decay associated with the corrosion of metallic fastenings. The title has been deliberately chosen to emphasize that in wooden construction the troubles are not just those of corrosion of the fastenings, but also the destructive secondary effects on the wood caused by the products of the ...
L C Pinion

Deterioration of wood viewed from iron nail
1991 - IRG/WP 2368
Deterioration of nail was graded by a five - rank numerical - rating. The rating of nail moisture content and decay of wood were inspected in a mortal-wall of 34-year-old house. The wood was mostly in decay, when the rating of the nail was above about 4, and the moisture content was above about 20%. Nailed wood specimens kept in several humidity room of 20°C for 4 years showed that the rating of ...
H Imamura

Untersuchungen zur Prüfung mit Moderfäulepilzen im Vermiculit-Eingrabe-Verfahren
1972 - IRG/WP 214
Im Hinblick auf die Entwicklung eines Prüfverfahrens für die Bestimmung der moderfäulewidrigen Wirksamkeit von Holzschutzmitteln wurden Versuche mit Reinzuchten von Pilzen und mit Vermiculit als Trägersubstanz sowohl mit unbehandelten als auch mit Schutzmittelgetränkten Holzproben durchgeführt. Dabei wurde die Eignung von handelsüblichen, eintachen Einweg-Kunststoffbechern anstelle der bish...
W Kerner-Gang, M Gersonde

Investigations on testing with soft rot fungi by the vermiculite-burial method
1972 - IRG/WP 215
With the object of developing a test method to determine the effectiveness of wood preservatives against soft rot attack, tests have been carried out with pure fungal cultures using vermiculite as the substrate for untreated and preservative impregnated wood blocks. In these tests the suitability of common commercial, simple disposable beakers was proved successful as a substitute for the glass bo...
W Kerner-Gang, M Gersonde

Performance of Fasteners in Treated Wood: A Comparative Study
2009 - IRG/WP 09-40465
Fastener performance is an important property for treated wood. Published data on screw and nail performance for different preservative systems currently on the market are, however, limited. In this study, screw and nail withdrawal strength for southern pine wood treated with ACQ (above ground and ground contact), MCQ (above ground and ground contact), borate (disodium octaborate tetrahydrate – ...
Q Wu, T Shupe, J Curole, K Ragon, M Voitier, M Freeman, D Ring

The Structural Performance of the Nail Driven into the Decayed Wood
2019 - IRG/WP 19-20652
In late years there are many actions to long-term excellent house realization. We have to consider repair or reinforcement for long-term and safety use of wooden house. There are various studies focused on structural performance of decayed wood. It is important for long-term use of wooden house that structural performance of nailed joint on decayed wood is accurately evaluated. However, there are ...
N Wada, H Isiyama

The Influence of Wood Included Salinity on Nail
2019 - IRG/WP 19-40863
In the Great East Japan Earthquake that occurred on March 11, 2011, many buildings suffered from natural seawater dipping due to the tsunami. It has become clear that corrosion progresses in nail that had submerged in natural seawater compared to nail that had not submerged in natural seawater. However, processing for this has not been developed. Therefore, in this research, we experimentally expl...
R Nakano, H Ishiyama, K Sakano

Influence of Drying Condition of Wood on Rusting of Nail
2019 - IRG/WP 19-40887
Recently in Japan, the durability of metal joint in wooden structures become important. Revised Building Standard Law was enacted in 2000 and Act on the Promotion of Popularization of Long-life Quality Housing was enacted in 2008 in Japan. Since then, the durability of the metal joints in the wooden houses becomes important. But there are not any detailed regulation for the durability of the metal...
H Ishiyama, N Wada, T Nishimura, T Mori

Study on Nailed Joint with Iron Contamination. Part1: Shear Performance of Nailed Joint with Iron Contamination
2019 - IRG/WP 19-50349
In Japan, The building standard law was amended in 2000.1) The use of metal joint was obligated by this law. Since then, metal joints have been largely used for wooden buildings. Also, Act on the Promotion of Popularization of Long-life Quality Housing was enacted in 2009 and leaving Long-life Quality Housing has been focused on2). However, leaving houses to posterity for a long time causes severa...
R Nakano, D Nakano, H Ishiyama

Study on Nailed Joint with Iron Contamination. Part2: Elucidation of the Occurrence Condition of Iron Contamination
2019 - IRG/WP 19-50350
In recent years, efforts towards wooden buildings are progressing in Japan. And many woods are used in various places. However, various problems have also occurred in wooden buildings. One of the problems is iron contamination which appears when wood and metal chemically react. At present, tree species that are prone to iron contamination and components that cause iron contamination are clarified....
D Nakano, R Nakano, H Ishiyama

Relationships between deterioration part and structural performance in wooden houses
2023 - IRG/WP 23-50376
Based on the survey examples, there are four patterns of deterioration that tend to occur in plywood bearing walls of wooden houses in Japan. The first is a pattern in which wall is in a whole deterioration. It is a no damage wall or test specimen. The second is a pattern in which only the sill is deteriorating. It is caused by moisture or termites from ground to the base. In addition, there is a ...
Y Ota, H Ishiyama, S Okamoto