STATE OF THE ART REVIEWS

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1. INTRODUCTION COST ACTION E22: Environmental optimisation of wood protection In the old federal states of Germany there are ca 200 to 250 impregnating companies with ca 300 pressure impregnation plants and about 2.000 – 3.000 companies with ca 2.500 to 3.000 dipping plants (Table 1). The impregnating companies in the former German Democratic Republic (GDR) had ca 10 pressure impregnation plants at their disposal, of which 6 are still in operation, and about 100 dipping plants. Table 1: Impregnating systems in Germany (Peek et al. 1995 1 ). Type of treating system pressure plants dipping plants 62 Federal States Old New ca 300 2.500 – 3.000 (10) 6 ca 100 In the Federal Republic of Germany about 1.9 – 2.8 million to timber are impregnated every year (Table 2). The predominant share of this (1.3 – 2.1 million to) is structural timber. About 0,6 million to of timber are impregnated to be used as palisades, noise protection barriers and fences in horticulture and landscaping. At present ca 29.400 to are being used for the production of sleepers for the Federal Railway, whereby ca 11.800 to are impregnated with chromium salts. About 4.700 to timber are impregnated every year for the production of poles for the national Telecom and about 9 – 12.000 to for power plants, although the tendency is receding. About 5.000 to timber have been impregnated every year for cable drums. Today the official reading is that cable drums to be used in Germany are not any longer impregnated. Table 2: Estimated production of impregnated wood (most frequent commodities) in 1.000 to (Peek et al. 1995) Origin quantity (* 1,000 to) structural timber horticulture and landscaping sleepers poles - telecom utility poles cable drums 1.300 – 2.100 600 29 5 9 – 12 5 Total 1.900 – 2.800 to 1 Peek, R.-D.; Voß, A.; Willeitner, H. (1995): Belastung von Altholzsortimenten durch Holzschutzmittel. In: Prüfung und Überwachung von Holzhackschnitzeln für Feuerungsanlagen. Fachgespräch 1994. Landesumweltamt Brandenburg, Kleinmachnow, S. 20-32.
COST ACTION E22: Environmental optimisation of wood protection Beech is predominantly used for the production of sleepers as well as small amounts of oak. Soft wood, with a proportion of approx. 70% spruce, is used in all remaining areas where impregnated timber is applied. 2. P<strong>ART</strong>ICIPANTS Research on wood protection in Germany is carried out more or less actively and at different levels of intensity by 2 Research Organisations, 12 Universities, 3 Material Testing Institutes and 8 other organisations. Invitations were sent to all of them to ask for their contributions to this state of the art document. Three organisations replied, and this document is based on those responses and a contribution from BFH. From not answering to the invitation it cannot be concluded however, that those organisations finished their research activities. It is well known that WKI, Braunschweig, covers a leading position in wood waste recycling and that ihd, Dresden, gains expertise in fungal testing of wood preservatives. They will remain included into the contact list for further information and might come up later for an update of the country report. This document is structured to offer contact information and an introduction to principal interests and research expertise of the organisations that responded to the invitation within the scope of the COST Action E22. The second section within this report gives more detail on specific activities related to the three working groups within the COST Action E22. Finally the report summarises and concludes on the state of the art in Germany. Bundesanstalt für Materialforschung und -prüfung (BAM) Gruppe IV.1 Dir. u. Prof. Dr. Dieter Rudolph E-mail: dieter.rudolph@bam.de. Research themes Dr. Horst Hertel • Hylotrupes control biological and biotechnical approach: growth regulators, pheromones, attractants, repellents and mating behaviour • Insect control using plant extracts • Termite control using baiting systems Manfred Grinda • FACT: Evaluation of the European Lap-joint method and investigation on its comparability with combined open air weathering and laboratory biotests and - artificial weathering methods - Investigations on the colonization of lap-joints by micro-organisms - loss of biocides from wood after different periods of exposure 63
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STATE OF THE ART REVIEWS

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