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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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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Lumber Grade-Marking History: 1918

Date Published 02/07/2019

Introduction Even though we don’t necessarily think about these early years of the 20th century as critical to human history today, all it takes is one cursory glance at some of the things that happened during 1918 to see that if anything, that may just be a bit of an understatement. At the end of Continue reading..


Lumber Grade-Marking History: 1917

Date Published 01/08/2019

Introduction 1917 was a year of many firsts. Jeannette Rankin officially became the first female member of the United States House of Representatives in March of that year, right around the time that Woodrow Wilson was sworn in for his second term as president. The Republic of China would later terminate all diplomatic relations with Continue reading..


Lumber Grade-Marking History: 1916

Date Published 12/13/2018

Introduction 1916 was a year that gave us a great many things for the first time, many of which our lives literally depend on today. On New Year’s Day, the British Royal Army Medical Corps carried out not only the first successful blood transfusion in history, but they did so using blood that had already Continue reading..