The Major Defects In Southern Hardwood Veneer Logs And Bolts

This publication provides a broad spectrum of information on the hardwood veneer industry in North America. Veneer manufacturers and their customers impose guidelines in specifying wood quality attributes that are very discriminating but poorly defined (e.g., exceptional color, texture, and/or figure characteristics). To better understand and begin to define the most important attributes that distinguish veneer logs from sawlogs, and high-end from low-end veneer logs, we visited and interviewed veneer log buyers and sellers, veneer manufacturers, and veneer sales personnel. The first section of this report provides information on the demographics of the hardwood veneer industry and domestic and export market influences on veneer manufacturing. This is followed by a discussion of: 1) veneer quality requirements for different product markets, 2) veneer log quality evaluation procedures, 3) veneer log procurement systems, 4) regional variations in veneer log quality characteristics, and 5) species-specific quality requirements and issues.

S2To properly classify or grade logs or trees, one must be able to correctly identify indicators and assess the effect of the underlying defect on possible end products. This guide assists the individual in identifying the surface defect indicator and shows the progressive stages of the defect throughout its development for yellow poplar. Twelve types of external defect indicators and associated defects that are particularly difficult to evaluate are illustrated and described. S3.

S2To properly classify or grade logs or trees, one must be able to correctly identify indicators and assess the effect of the underlying defect on possible end products. This guide assists the individual in identifying the surface defect indicator and shows the progressive stages of the defect throughout its development for sugar maple. Eleven types of external defect indicators and associated defects that are particularly difficult to evaluate are illustrated and described. S3.