Effect of log storage on structural veneer processing

A reduced temperature drying schedule was tested for potential grade recovery improvement of structural veneer cut from water-stored southern pine logs. Freshly cut, 1-year-old and 3-year-old logs were evaluated. By lowering zone-three dryer temperature, the frequency of grade-reducing splits was reduced. Moisture content (MC) average and distribution were unaffected by the schedule change. With regard to permeability, water sorption tests showed favorable results from the 1-year-old material that was dried at the lower temperature. Elevated veneer thickness variation from water-stored logs had no apparent effect on final MC average or distribution. Reducing the zone-three temperature by 30?F increased the total veneer drying times by 13 and 19 percent, respectively, for the 3-year-old and 1-year-old material.

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