Nondestructive evaluation of wetwood and honeycomb

Lumber drying defects in the form of surface checks and honeycomb are especially severe in oak lumber and constitute a major source of value loss and waste. The Forest Products Laboratory, USDA Forest Service, has been involved in research aimed at developing a low-cost, industrial-type detection system to identify wetwood in green hardwood lumber and honeycomb in dry lumber. This report summarizes the results of a series of laboratory studies and equipment development efforts.

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