Radical changes in the requirements for more safe pressure impregnation in the Nordic countries in 1988
After introduction of quality control schemes and standards in the Nordic countries during the seventies, the first radical change of the standards and practice of work took place after pressure from the labor unions and authorities in 1988 and 1989 in Denmark and in Sweden. A new class of preservation with less retention for out of ground contact use was introduced, fixation times were prolonged to 6 and 14 days, and branding became a requirement. At the same time, treating companies replaced CCA with arsenic-free preservatives, and started using processes for accelerated fixation. Drying of treated wood was started to be used widely.
Keywords: BRANDING; CCA; CCP; DRYING; FIXATION; NORDIC COUNTRIES; NWPC CLASS AB; HEALTH & SAFETY; PRESSURE IMPREGNATION; UNIONS