Your search resulted in 67 documents. Displaying 25 entries per page.
Revised South African standards for wood preservation: Protocols for approval of wood preservatives
1995 - IRG/WP 95-20072
In 1994 the South African timber treatment industry completed its revision of the South African Bureau of Standards (SABS) Code of Practice for the preservative treatment of timber. These revisions were undertaken in parallel with changes to the SABS specifications for preservative treated timber. As a result of shortcomings in the previous wood preservative classification system which was based o...
D Conradie, P Turner, W E Conradie, A D Currie, I S J Burger
Pretreatment decay in air-seasoning Scots and Corsican pine poles in England
1989 - IRG/WP 1390
British grown Scots and Corsican pine poles were sampled for colonization by basidiomycetes after air-seasoning for 6 to 9, or 16 to 20 months. The amount of infection present in these poles was compared with that in poles which were imported from Finland. After 6 to 9 months seasoning, the British grown pine poles were heavily infected with Peniophora gigantea, Cylindrobasidium evolvens, Stereum ...
A R Zahora, D J Dickinson
Possibility and problems of characterizing treated wood after service with regard to disposal
1993 - IRG/WP 93-50006
For the disposal of wood waste under ecological conditions, information about its hazardous potential and the logistic aspects for its handling is needed. The main criterion to evaluate the hazardous potential besides the determination of the type and quantity of active ingredients in the wood will be the degree of mixture with different treated or untreated timber. Assortments can be homogeneous ...
A Voss, H Willeitner
Termite resistance classification of some tropical and temperate species based on the laboratory choice test results against formosan termite, Coptotermes formosanu
2004 - IRG/WP 04-20291
The results of classification of termite durability were varied. We carried out
laboratory evaluation of the classification of termite durability on various species by
the choice test against formosan termite, Coptotermes formosanus. We classified five
grades (very sensitive to very resistant). According to our results, azobe, ipe, keruing,
intsia, kapur, yellow meranti, jarraah, malas, cypres...
K Suzuki
Differentiation of Scots pine heartwood and sapwood by near infrared spectroscopy
2003 - IRG/WP 03-10459
In Scandinavia Scots pine heartwood has, in recent years, gained popularity as material for external structures exposed to moderate risk of decay. As non-durable sapwood surrounds the heartwood in pine trunks it is of crucial importance to separate this wood from the heartwood during log processing into heartwood products. Heartwood and sapwood can be differentiated by visual evaluation of colour ...
P O Flæte, E Ystrøm Haartveit
Effects of air-seasoning on fungal colonization and wood strength of Douglas fir poles
1987 - IRG/WP 1315
Air seasoning economically reduces the moisture content of Douglas fir poles before pressure treatment with preservatives. Advanced decay in poles in service has resulted when decay fungi (Basidiomycetes) colonized poles during air-seasoning and survived the treatment process. These problems have led to recommendations to severely limit this practice. To determine the role of these fungi in peeled...
J J Morrell, M E Corden, R D Graham, B L Kropp, P Przybylowicz, S M Smith, C A Sexton
International standards - can we make them simple? Stage 2: Reflection arising from the discussion at IRG 27
1996 - IRG/WP 96-20103
For the purpose of the ISO FAST TRACK project on preventive wood protection and durability, one shall refer to the 3 following stages:
Hazards: (for wood in service), a review of biological agencies defining the scope;
Exposure: a review of local, geographical parameters influencing the virulence of biological agencies towards wood in service (i.e climate indexes);
Risks: as a combination of ha...
G Ozanne
Physical and mechanical properties of tea (Thea sinensis L.), kanak chura (Peltophorum pterocarpum (DC.) Baker ex Heyne ) and bottle brush (Callistemon citrinus Stapf. ) - Timbers grown is Bangladesh
1999 - IRG/WP 99-40141
The physical and mechanical properties, especially the strength, density, structure, colour, natural durability, workability, seasonableness and treatability of timbers of tea (Thea sinensis), kanak chura (Peltophorum pterocarpum) and bottle brush (Callistemon citrinus) grown in Bangladesh have been found out for the first time. The tea and bottle brush are completely treatable at dry condition an...
A K Lahiry
Information from the COIPM wood group. (With Appendix: Préserver les matériaux en milieu marin sauvegarder l'environment marin telles sont la vocation et la mission du C.O.I.P.M.)
1989 - IRG/WP 4156
During the last COIPM Meeting, up to date information on cooperative work to test the resistance of plastic wrapping for pilings were submitted and discussed. In 1986 untreated wood samples wrapped with shrinkable polyolefin sleeves were submerged in 9 stations, situated in temperate and tropical waters. After 1 or 2 years of immersion the samples showed no sign of penetration by marine borers and...
A Gambetta
Major insects attacking timber used for building purposes and a practical approach for their control
1990 - IRG/WP 1449
Lignocellulosic materials like wood, bamboos, palmyra palms, reeds, leaves and grasses have been the oldest materials used by human beings. Although with the rapid pace of industrialisation, specially in several western countries, wood began to be replaced with alternative materials like cement, steel etc. yet its use has not vanished even in highly developed countries. Some of the reasons for thi...
V R Sonti, B Chatterjee
The potential use of impregnated coconut wood for power line poles in rural areas of Java
1980 - IRG/WP 3130
Electrification of rural areas in Java needs thousands of power line poles which are relatively cheap in price, but have adequate strength and are fairly durable. A choice of wood species is available in the country. One alternative is coconut wood found in abundance in the villages. This may give a solution to Java's needs since supplies are readily available almost everywhere. Based on ...
H Yudodibroto
The resistance of timbers to impregnation with wood preservatives
1979 - IRG/WP 3137
It is anatomical structure which determines liquid flow rate within different timber species. This cannot be deduced from properties such as density or rate of growth, and can only be found by experiment. A standard test has been in use at the Princes Risborough Laboratory for many years, employing a pressure-impregnation treatment, and a large number of timbers have been studied. The test consist...
Anonymous
Preliminary pole treatment trials with chlorothalonil in hydrocarbon solvent
1994 - IRG/WP 94-40027
A series of 460-mm long, end-sealed southern pine pole stubs were treated with chlorothalonil in hydrocarbon solvent. Over sixty sections were treated using various combinations of initial seasoning (kiln-drying, steam-conditioning), treating temperature (ambient, 200°F), initial air pressure, and final conditioning (steam flash + vacuum, expansion bath + vacuum, steam distillation + vacuum). Dis...
H M Barnes
Shorter-term biological control of wood decay in pre-seasoning pine roundwood as an alternative to chemical methods
1992 - IRG/WP 92-1555
Previous studies on the long-term control of decay in creosoted transmission poles, using Trichoderma and other antagonistic moulds, have met with limited success. However, it is possible biological control is more suited to control of decay on shorter time scales. An earlier study, focusing on pre-seasoning treatment of transmission poles showed that favourable porosity increases could be brought...
M W Schoeman, D J Dickinson
Diagnostics methods and routes proposalsto define selective sorting of demolition wood wastes
2001 - IRG/WP 01-50177
Wood wastes are more and more often used in different wood waste valorisation industries (panels, wood energy, cement factories, ...). These industries are in progress to include in their processes, wood wastes coming from demolition wood. A state of the art and an analysis have been made to propose : (1) diagnostics methods to carry out a classification of wood wastes on demolition sites and in t...
G Labat, E Bucket, C Fréret, G Deroubaix
Safe handling of solvents in relation to classification and labelling
1990 - IRG/WP 3569
The classification and labelling of chemical products, safety data sheets and personal protective equipment are topics which at present are given a very high priority in Denmark. The area is very large and may seem extremely difficult to comprehend. The frequent publication of acts and announcements from the authorities does not make the work any easier. In the following I will try explain how we ...
J Haugaard
The control and pretreatment decay in air seasoning Scots and Corsican pine poles in England
1990 - IRG/WP 1451
Previous work clearly showed that air-seasoned, British grown Scots and Corsican pine poles are subject to serious pretreatment decay. In order to control these infections a range of pretreatments are currently being investigated. One series of treatments is designed not only to control decay but also allow the development of mould and stain fungi in order to achieve the desired increases in poros...
D J Dickinson, A R Zahora, A P Dodson
Regulations of wood preservatives in Finland
1978 - IRG/WP 3124
Toxic wood preservatives are covered by the Poison Act (No. 309/69). The act came into force in May 1969 and was supplemented by the Statute on Poisons (No. 612/69). The act and the statute contain the regulations on the production, commerce and handling of poisons. Already when issued they were complained to contain some defects and obscurities. However, only minor alteration in them have been ma...
T Vihavainen
The effect of stack height on the performance of preservatives used for the prevention of sapstain on seasoning wood
1997 - IRG/WP 97-10192
The performance of three anti-sapstain preservatives was investigated under field conditions in south east England. The preservatives under test were: copper-8-quinolinolate (Mitrol PQ8) trimethylalkylammoniumchloride and sodium hexanoate (Sinesto B) and chlorothalonil (Tuff Brite). The preservatives were tested on Corsican Pine grown in south east England. The field trial was set up to investigat...
J R Williams, D J Dickinson, J F Webber
Partial seasoning and preservative treatment systems for pine roundwood
1982 - IRG/WP 3187
Experimental trials at FRI, Rotorua showed that the steaming schedule normally used for steaming and venting is also suitable for steaming and vacuum seasoning. Applying vacuum of up to -84 kPa immediately after steaming did not increase the initial loss of wood moisture significantly in comparison to steam/venting. The main improvement to wood condition by using steam/vacuum appeared to be to dis...
A J Bergervoet
Common Decay Micromorphology “Anomalies” Challenge Current Decay Classification
2006 - IRG/WP 06-10578
Decay micromorphology was studied systematically for diversely preservative treated Pinus radiata and Fagus sylvatica 20 x 20 x 500 mm stakes across 13 in-ground field test sites, during a 6.5 year exposure. New insight into the micromorphology of the early stages of decay enabled new and more detailed interpretation of the mechanism of their formation and suggested that current decay classificati...
R Wakeling
Construction of an ITS sequence database for the identification and classification of wood rot fungi
2007 - IRG/WP 07-10626
Developing a database that contains information about wood rot fungi is important in improving technologies about wood preservation as well as advances in understanding wood decay. On the other hand, with rapid spread of the Internet, establishment of a system for the swift precise access to information are required for the computerization of the research information. In the present study, genetic...
S Horisawa, Y Honda, S Itakura, S Doi
Development of an International Use Classification System
2008 - IRG/WP 08-20380
Working Party 2.5 of the IRG was set up in 1995 in response to discussion around proposals for an International Wood Preservation Standard. Two years later, ISO Technical Committee 165 Timber Structures set up a subcommittee SC1 Wood Materials – Durability and Preservation to address this issue. It was agreed that neither the European Hazard Class system nor any other regional system could be ...
P I Morris
Simulation and Investigation of Wood Degradation by Erosion Bacteria in Laboratory Experiments
2010 - IRG/WP 10-20431
A Microcosm experiment was successfully set up to establish, monitor and manipulate bacterial wood degradation under low oxygen conditions. Sound pine sticks were placed in waterlogged sediment from a heavily decayed pine pile foundation site in Amsterdam. The system was subject to different gassing treatment regimes in order to investigate the role of oxygen in the bacterial degradation process o...
J Gelbrich, E I Kretschmar, N Lamersdorf, H Militz
Classification of wood materials using Fourier Transform Near Infrared Spectroscopy and multivariate analysis
2011 - IRG/WP 11-20471
A distinction between preservative-treated wood and non-treated wood can be demonstrated by the combination of Fourier Transform-Near Infrared Spectroscopy (FT-NIRS) and Multivariate Analysis (MVA). This technique is non-destructive, quick, easy to use and can be portable. The calibration models for different heavy metals are set up using principal component analysis (PCA) to classify species of t...
M A Bouslamti, M A Irle, C Belloncle, V Salvador, S Hulot, B Caron, E M Qannan