How to Improve Yields Milling ‘Out of Shape Logs’

“There are opportunities for improving yield in out-of-shape hardwood saw logs. Good decision-making is important. To maximize the yield and economic value of the end products, have a plan before the log is opened up. Th ere are more critical decisions to be made on the outside of a log than the inside, because that is where most of the clear wood is located. Finally, maximizing yield has to be in balance with sawing times, and thus sawing costs.”

This is just a sampling of the advice served up in a 2014 report authored by Neal Bennett of the U.S Forest Service, Northern Research Station, in Princeton, WV. The title of the report is “Sawing Methods for Improving Lumber Yield Recovery of Out-of-Shape Hardwood Saw Logs.”

Here’s the abstract: “Not every saw log is straight and cylindrical in shape. In fact, logs are commonly out-of-round, tapered, or crooked, and often a combination of these shapes. Sawmill operators employ every means to recover as much yield as possible from each log. Yield recovery can be the difference between a profitable and a non-profitable log. There are opportunities for improving yield in out-of-shape hardwood saw logs while still maintaining lumber quality.”

The report includes milling strategies for logs that are out of round, tapered or crooked.

Read the report.