Southern Pine Inspection Bureau


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.

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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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SPIB eLearning Go to Courses

The Solution for Lumber Grader Training

SPIB eLearningIf you want to learn to grade dimension lumber, or if you just want to become more knowledgeable of the grading rules, the defects and characteristics of lumber, the terminology and theory of dimension lumber grading then this course is for you.

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Behind the Mark: A Look at the SPIB Treated Wood Inspection Process

Date Published 05/02/2016

Inspection Practices for Treated Lumber Products There are many questions about the different treated wood products in our market today. Although there may appear to be many differences in what options to use for your next project, there may be more similarities that you know. Treated wood products must meet very specific quality requirements to Continue reading..

How to Grade Displaceable Knots

Date Published 03/24/2016

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 Continue reading..

What Every Dimension Lumber Grader Trainee Should Know

Date Published 03/02/2016

If you are learning to grade Dimension Lumber for the first time, there are some basic facts and skills that you should study and practice before working with your trainer. Following is a list of these along with some tips, and further clarifications of rules that have proven vital to mastering the art of lumber Continue reading..