Estimating kiln schedules for tropical and temperate hardwoods using specific gravity

Dry-kiln schedules have been developed for many hardwood species, but many more, especially tropical species, do not have a recommended schedule. The study reported herein investigated the possibility of estimating kiln schedules using specific gravity (SG). Using known schedules and SG data of 268 hardwood species, a classification approach and linear regression analysis were applied and compared to establish the relationships between kiln schedule code numbers and SG. In general, schedule predictions matched reasonably well with recommended schedules, but for some species, the differences were large. The classification approach was slightly superior to regression analysis in predictive ability.

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