Different hardwood and softwood species from Bangladesh and Bhutan was investigated regarding density, green fiber stress, natural durability of heartwood and CCA treated sapwood, CCA treatability grades, sapwood thickness, and kiln-drying properties for long term use as electric poles. These properties along with the past service records for nineteen years, separated ten heardwood and five softwood species into four treatment groups. The treatment groups are very specific for specific timber species and adequate for equivalent requisite service life for tropical and subtropical climatic conditions without premature failure like in the past.

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