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Understanding-hardwood-lumber-grading, most hardwood lumber produced in this country is graded using the rules developed and maintained by the national hardwood lumber association (nhla). in 1897, hardwood lumber producers and users formed the nhla to standardize the grading of hardwood lumber. prior to that time, individual mills had their own grading systems for their local markets.. Worldwide, hardwood lumber producers “grade” their lumber, assuring downstream consumers of the lumber of the lumber’s quality for the intended use. put simply, lumber grading serves quality assurance needs. the simplified process of determining hardwood lumber grades the hardwood grading rules are quite complex and require study., for more than a century, the hardwood lumber industry has held to a central grading standard established by the national hardwood lumber association (nhla). thanks to the foresight of the early founders of the nhla in 1898, some order has been added to the chaos that had become the lumber trade..

The hardwood lumber grading short course is designed to benefit anyone involved in the lumber industry who needs a basic understanding of hardwood lumber grades. i'm also lean heavily on nhla (north american hardwood lumber association) grading system because it is the most widespread system in use., most hardwood lumber produced in this country is graded using the rules developed and maintained by the national hardwood lumber association (nhla). in 1897, hardwood lumber producers and users formed the nhla to standardize the grading of hardwood lumber. prior to that time, individual mills had their own grading systems for their local markets..

Take a look at this article, understanding hardwood lumber grading see the nhla website. they have a nice picture guide. the best grade is fas and it must be 83% clear or clearer on the poorest side., the grading of hardwood is based solely on the two faces of a board, and how wide it is, the thickness of the board doesn't come into play. when grading hardwood lumber the worst side (face) of a board is usually used to grade that board (sometimes the best face is considered). there are eight grades of hardwood lumber. fas: first and seconds..

For more than a century, the hardwood lumber industry has held to a central grading standard established by the national hardwood lumber association (nhla). thanks to the foresight of the early founders of the nhla in 1898, some order has been added to … [read more...] about understanding hardwood lumber grading, grading lumber is the process of assigning a quality figure to it - not unlike grading a school paper or a test. lumber is graded based on the poorest side of the lumber, and on the yield the lumber is expected to produce (that is, how much of the wood can be converted into boards verses how much will be thrown away)..

As an aside, fas is the highest quality grade for domestic (us) species granted by the nhla grading system (national hardwood lumber association). an fas board must be at least 6" wide by 8' long and must be 83% clear of defects on both faces. it should be noted that sapwood is not considered a defect as well.