What-is-Wood-Grain

What is Wood Grain

Wood grain is the longitudinal arrangement of wood fibers [1] or the pattern resulting from this.[2] R. Bruce Hoadley wrote that grain is a “…confusingly versatile term…” including the direction of the wood cells (straight grain, spiral grain), surface appearance or figure, growth-ring placement (vertical grain), plane of the cut (end grain, quarter sawn, flat […]

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How to Grade Displaceable Knots

How to Grade Displaceable Knots

Grading Knots Away From the Edge Learning to grade edge knots and combination knots in dimension lumber takes a fair amount of study and practice. These type knots most often limit the grade of a piece. Once the grader has a complete understanding of how these knots are measured and limited it becomes a matter […]

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Lumber-Size-Categories

Lumber Size Categories

This blog is the second in a series of articles intended to provide information about softwood lumber, including grade-marking, design properties, testing, and continued monitoring of the lumber resource. American Softwood Lumber Standard There are several ways to classify lumber which are spelled out in the American Softwood Lumber Standard – Voluntary Product Standard PS […]

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Appearance and Quality of Dimension Lumber

Often end users of Dimension Lumber complain that lumber from different suppliers does not appear to be of the same quality. It may look better or worse, yet the packages bear the same grade mark. The lumber could be graded correctly; however there are indeed some factors that can influence the overall appearance of lumber […]

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Warp-in-Dimension-Lumber

Warp in Dimension Lumber

What is Warp? Warp is defined as any deviation from a true or plane surface, including bow, crook, cup, twist, or any combination thereof. Warp restrictions are based on the average form of warp as it occurs normally, and any variation from this average form, such as short kinks, shall be appraised according to its […]

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Western-Wood-Services

Western Wood Services

SPIB is proud to announce that a new 3rd party inspection agency is open for business in the western U.S. Western Wood Services, a division of SPIB, has been established specifically to offer western treaters an option in inspection services for their residential treated wood products.

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