Since 1915, SPIB has provided grading rules, training, production surveys, and other services to ensure product integrity and build a sustainable future for the industry.
The SPIB mark represents quality assurance and reflects our commitment to lead the industry in exacting standards, thorough training, and innovative application of advanced technologies to ensure the integrity of softwood lumber products.
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These training courses include content to enhance learning with videos, photos, and diagrams, and also features interactive activities that encourage learning. This supplemental content provides ways for users to keep learning with information that is different from the core content.
What is the difference between a shake, a check and a split? They are similar in that they all are separations lengthwise in the grain of the wood; however, each has a different origin and a different effect on the grade of dimension lumber. First, let’s look at the definition of each. Shakes Shakes are Continue reading..
What is Dimension Lumber? We have all seen buildings being framed with lumber. Do you know what type and grades of lumber are used in this framing process? Sometimes referred to as “dimensional lumber” or “framing lumber”, this wood is the mainstay of the housing industry in the US and Canada. Dimension lumber, as this Continue reading..
Have you ever wondered why you observe some large and at times unsightly decayed knots on the surface of your framing lumber? How can this lumber be graded correctly, especially in No.2 or higher grades? If you do not understand how and why knots in Dimension Lumber are limited, then these knots that appear unacceptable Continue reading..