Press-drying plantation loblolly pine lumber to reduce warp losses: economic sensitivity analysis

Several studies have suggested that press-drying, as an alternative to high-temperature kiln-drying, is effective in reducing warp and grade loss from warp in dimension lumber cut from plantation-grown loblolly pine trees. Using estimates developed in these studies for press-drying time and potential warp reduction, an engineering economic analysis of press-drying was conducted. The analysis showed the sensitivity of the maximum allowable cost of a press to a) current level of warp loss; b) reduction in warp loss by press-drying; c) press-drying time; d) cost of degrade; and e) increase in green target thickness required to accommodate thickness loss caused by platen pressure.

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