Your search resulted in 835 documents. Displaying 25 entries per page.
The new National Directive on wood preservation in the Netherlands
1998 - IRG/WP 98-50101-03
In the Netherlands the major part of treated timber is sold under the KOMO-certificate. The National Directive for vacuum pressure treated timber on which certification is based, is currently being revised. The new National Directive will contain a code of good practice including maximum leaching figures. It incorporates quality requirements for treated timber, existing legislative requirements an...
W J Homan, J K B Kwisthout, J Dubelaar
Paper for discussion - Incising of spruce to improve preservative penetration
1973 - IRG/WP 318
Large quantities of whitewood or Norway spruce (Picea abies) are regularly imported into the United Kingdom from continental Europe. In addition, increasing amounts of Sitka spruce (Picea sitchensis) are likely to become available over the next decade from the Forestry Commission. In many ways spruce is a good structural timber, eg it is relatively cheap and easily available, it has adequate stren...
W B Banks
Further thoughts on standard principles of testing termiticides and/or wood preservatives
1992 - IRG/WP 92-1530
At the last annual meeting in Kyoto, Japan, there was a special session devoted to the standard principles of testing termiticides. There was definitely a perceived need by researchers and industry for some guidelines that spell out basic procedures required for any methodology in testing termiticidal formulations anywhere in the world. In the testing of new potential active ingredients, considera...
J R J French
Wood preservation in Kenya
2000 - IRG/WP 00-40190
Focussing an Wood Preservation in Kenya, the Report discusses and elaborates on Education and Training, Research, Wood deteriorating organisms, Treatment Plants and Processes, Preserving Chemicals, Specifications, Markets, Health and Safety and Environmental issues. Education and Research is limited to one Institution only, other Institutions involved with the properties and utilization of wood ha...
R Venkatasamy
Utility pole recycling and disposal in Eastern Canada
1990 - IRG/WP 3587
Increasing public awareness, prompted by environmental groups such as Greenpeace, concerning the use and disposal of treated wood is becoming a serious issue in Canada. Producers and user groups of treated Pentachlorophenol (PCP) utility poles are at the forefront of public, government and media attention. If, as expected, further limitations on the use and disposal of PCP by the public are impose...
S D Henry
Industrial wood preservation in Kenya. Present status – future prospects
2005 - IRG/WP 05-30385
Although some 50 years old, industrial wood preservation in Kenya does not appear to have technically, scientifically, and commercially evolved and contributed to significantly extend service lives of timbers, protect health and the environment, and curb unnecessary over-exploitation of forests. The population of the country has increased by 530% over the past 50 years; regular excisions have red...
R Venkatasamy
Generic code of good practices for wood preservation facilities
1994 - IRG/WP 94-50037
Wood preservation chemicals are designed to be toxic to wood destroying organisms. This toxicity, however, may not be limited to target organisms but the use of these chemicals can potentially harm various biota and humans as well. This fact dictates that adequate precautionary measures be employed to prevent any harmful effects to humans and the environment. The extensive experience with wood tre...
V N P Mathur, G Das
Influencia de la impregnación con soluciones tánicas en la estabilidad dimensional de la madera de Pinus pinaster Ait. procedente de España
1992 - IRG/WP 92-3686
En virtud de la importancia que presenta la madera de Pinus pinaster Ait. en el sector constructivo español, se ha sometido a esta a tratamientos en autoclave con distintas soluciones tánicas naturales y artificiales a fin de estudiar su incidencia en la estabilidad dimensional frente a exposiciones exteriores. En el estudio se pone de manifiesto el efecto creado por el tratamiento protector en ...
J A Rodríguez Barreal, J Cubillo Jordan de Urries, L Garcia Esteban
A prototypical needle-incisor for refractory timber
1995 - IRG/WP 95-40041
A needle-incisor was manufactured for trial. This machine has an incising mechanism that a set of needles held by a rotary plate incises timber which is moved toward the front simultaneously, and then another set of needles incises a new part of the timber. Timber is incised by recycling the process. Timber incised of 4400 incisons/m² with the depth of 56 mm by 2.8 mm-diameter needles on all the ...
A Yakuwa, H Endoh, M Mori, S Doi
Marine exposure assessment of the natural resistance of a number of lesser known species of tropical hardwoods to teredinid and limnoriid borers
2004 - IRG/WP 04-10520
Naturally durable species of timber are used as an alternative to preservative treated timber for marine structures, but many species have not been evaluated for their potential for use in this environment. EN 275 specifies a 5-year test period - too long a period for screening tests to be economically viable. In this study, candidate timber species were selected for testing in the sea on the basi...
J R Williams, S M Cragg, L M S Borges, J D Icely
Comparative study on leaching of CCA from treated timber: Modelling of emission data
1994 - IRG/WP 94-50027
Results of a comparative study on leaching of CCA from treated timber are reported. The study aims at investigating the applicability of prestandard leaching test methods for modelling purposes. Prestandards used are the European standard proposed by CEN/TC38/WG11 and NEN 7345 (Dutch prestandard for building materials). Parameters of study are type of fixation, wood species (pine - spruce), specim...
G M F Van Eetvelde, M Stevens, L Van der Mijnsbrugge
Essais de collage de bois traités pour la réalisation d'éléments de charpente lamellées. (+ abstract dated September 1971, Influence du traitement de préservation sur le collage d'éléments de charpente lamellés collés et efficacité vis-a-vis de larves néonates)
1971 - IRG/WP 203
Le but du travail est de vérifier les propriétés générales d'une poutre lamellée collée après traitement des éléments la composant au moyen de formulations insecticides et fongicides commerciales à solvant clair dans les conditions les plus usuelles de fabrication. Les essences utilisées ont été: Epicéa - Pin sylvestre - Sapin de Douglas en planches rabotées de 80 cm de lo...
J Guillemain-Thévenot
Application of roller-pressing method to the novel liquid impregnation treatment of green timber
2001 - IRG/WP 01-40198
A transverse compression technique enabled us to impregnate liquid into green timber through replacement of the free water in the timber with a treatment liquid without any critical physical damage to the timber by the roller-pressing method. The roller-pressing is supposed to remove free water the cell cavities and to concurrently introduce the treatment solution into green timber in the treatmen...
M Inoue, K Adachi, K Tsunoda, Y Imamura, S Kawai
An attempt to develop a direct and reliable method for testing the preventive action of preservation treatments of wood against fungal decay
1980 - IRG/WP 2139
In wood preservation there are two classical ways for assessing the reliability of preventive treatments against wood decay: the laboratory tests in which the various parameters are evaluated independently and the field tests or service tests in which those parameters are acting together in the natural environment. One has always tried to build bridges between the two types of experiments and to e...
M Fougerousse
A serial exposure technique for estimating probable service life of treated timber
1978 - IRG/WP 2111
This paper briefly describes part of our preliminary work aimed at developing a test procedure that culd be adopted as a standard method. A detailed version of the work has been submitted for formal publication. In both papers, the aim is to promote interest in extended laboratory testing of wood preservatives. It is believed that this work may provide the basis of a laboratory test procedure from...
J A Butcher
Introduction of plank-built catamarans along the north coast of Andhra Pradesh, India – A development of recent origin
2003 - IRG/WP 03-10483
Hitherto, the most versatile fishing craft of the poor traditional Indian fishermen - the catamaran is made of solid timber logs of a few selected species of broad-leaved softwoods. Of late, the fishermen find it difficult to get these conventional varieties of timber chiefly because of three reasons, a) scarcity of commodity, b) prohibitive costs and c) competition from match and veneer industri...
M V Rao, K S Rao, M Balaji, V Kuppusamy
IRG/COIPM INTERNATIONAL MARINE TEST - to determine the effect of timber substrate on the effectiveness of water-borne salt preservatives in sea-water. Progress Report 1: Treatment of reference samples
1977 - IRG/WP 426
It was agreed in Wildhaus on 15 May 1976 that preparations for the test detailed in Document No: IRG/WP/414 should commence immediately, but that initially only two water-borne preservatives should be used - a copper/chrome/arsenic (CCA) and a copper/chrome/boron (CCB) formulation respectively. PRL, England (R Cockcroft) would be responsible for supplying samples of the reference timbers treated w...
R Cockcroft, T B Dearling, W O Schulz, H V Borck
Is there a need for re-sealing cut ends of envelope-treated softwood framing timber to protect against attack from Coptotermes spp. (Isoptera)?
2004 - IRG/WP 04-10524
The claim that Australian Coptotermes acinaciformis (Froggatt) do not appear to initiate attack on timber from the end grain, thereby negating the need for treating exposed cut ends of softwood framing material (35 x 90mm) which has a Tanalith™ T envelope, was investigated. Specimens of commercial Pinus radiata framing timber (untreated) and Pinus elliottii (untreated, envelope-treated) were pa...
M Lenz, J W Creffield, S Runko
Towards harmonisation of regional approaches for an International Standard for the approval of wood preservatives
1997 - IRG/WP 97-20122
Recent proposals from the European Standards body (CEN) for an ISO Standard on wood preservatives has initiated debate on whether there is any prospect of an acceptable common approach among ISO member countries, to a harmonised framework of hazard classes, with agreed supporting biological tests, leading to a unified rationale for demonstrating compliance with minimum performance standards for sp...
A F Preston, A F Bravery
In situ timber treatments by spraying. Distribution of preservative in wood
1991 - IRG/WP 3678
This study was carried out in order to make the Pest Control Operators able to achieve correct treatments and enhance their efficacy. It was carried out in two steps: 1) in laboratory, to learn the influence of various parameters like spraying pressure, use of repeated applications, distance from nozzle to wood; 2) in situ on roof timber of five buildings. In this case, the applications of the pre...
C Defoin, G Dupont, M Lamour, H Sageot, M-M Serment
Studies on the mobility of arsenic, copper and chromium in CCA-contaminated soil
1990 - IRG/WP 3571
CCA contaminated soils from six Swedish preservation plants were investigated primarily to study the mobility of arsenic but also that of copper and chromium in the soils. The soil samples represented average types with different amounts of clay, organic matter, arsenic, copper, chromium and different pH. The total soluble amounts of the elements were measured. The pH dependent solubility and the ...
J Bergholm
Creosote for wood preservation
1971 - IRG/WP 36
By creosote one usually means coal tar creosote, although there are creosotes of other origin. For example, wood tar creosote is a product of wood distillation. It is, in fact, in this connection that the word 'creosote' was first used. Early in the nineteenth century the oily product obtained by distilling wood was said to have an odour which resembled 'smoked meat&...
Anonymous
Chemical evaluation of borate treated pine sapwood attacked by the subterranean termite Coptotermes acinaciformis
1993 - IRG/WP 93-20003
Sapwood of hoop (Araucaria cunninghamii Ait. ex D. Don) and slash (Pinus elliottii Englem.) pines were treated by Vacuum Pressure Impregnation (VPI) to provide test specimens. The concentration of boron was defined by chemical analyses of the timber, in the zone of primary attack by the termite being bioassayed. A common method of definition of preservative retention, weight uptake of preservative...
A R Moffat, B C Peters
An investigation of the effects of pre-steaming on the treatment of sawn spruce timber with Celcure A, a copper/chrome/arsenic preservative
1981 - IRG/WP 3180
Difficulties in the treatment of spruce using standard vacuum/pressure techniques with both water-borne and organic solvent preservatives are well known. The growth characteristics of spruces (Picea spp) make them attractive candidates for forestry schemes. In 1975 the UK Forestry Commission had about 400 000 hectares, about 20% of total UK forest area, planted with Sitka spruce (Picea sitchensis)...
C R Coggins
Low polymer levels containing bioactive monomer polymerized in situ provide resistance to Gloeophyllum trabeum
1995 - IRG/WP 95-30066
Wood preservation based on in situ polymerization of potentially bioactive monomers has been studied. Tributyltin oxide acrylate (TBTOA) and pentachlorophenol acrylate (PCPA) were synthesized. Wood samples were treated at 2, 5, 10, 15 and 20% by weight solutions with varying amounts of crosslinker (trimethylolpropane trimethacrylate, TMPTM) and polymerized in situ in wood samples (2.54 x 2.54 x 0....
R E Ibach, R M Rowell