Researches on 45 hardwood species grown in Bangladesh regarding density, moduli of rupture (MOR), colour and treatability of sapwood and heartwood, seasoning property and natural durability of heartwood revealed that both sapwood and heartwood of 17 species could be full cell pressure treated with CCA at impregnation pressure of 14-18 kg/cm² and only sapwood of rest 28 species could be pressure treated. Hartwood of 28 species were found to be mostly refractory to treatment but naturally fairly durable to very durable when used indoor or overhead exposed conditions. The MOR of 45 timber species varied from 58-96 N/mm² at green conditions, sufficiently strong for distribution crossarms. The most dense timbers were found to be kilndried slowly and effectively. Inherent strength, conventional sawing, conventional grading with pilodyn, kilndrying before treatment and slow air-drying before outdoor storing upto EMC (19% MC) at centerline of crossarms and adequate CCA-C treatment in treatable areas would ensure long term utilization of these timbers in Rural Electric Systems in Bangladesh.

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