Glued laminated poles - Progress report after 30 years testing

IRG/WP 10-20427

Ö Bergman, J Jermer

In 1979 a number of glued laminated poles treated with CCA and creosote were placed in a greenhouse at Uppsala, at the Simlångsdalen test field in southern Sweden and in a power lane in Vuollerim in northern Sweden in order to study their resistance against biological degradation. The tests have shown that the best performance will be obtained if each lamination is treated with a water-borne preservative (only CCA was used in this test) and thereafter the laminated pole is treated with creosote. After 30 years’ exposure, all the creosoted poles in Simlångsdalen and Vuollerim showed only slight decay (grading 1) in the sapwood on surfaces with gluelines. In the outer laminations the decay grading was 2-3 in the heartwood and 1-2 in the sapwood.


Keywords: preservation, glulam, poles, field test, CCA, creosote

Conference: 10-05-09/13 Biarritz, France


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