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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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..


Lumber Grade-Marking History: 1915

Date Published 11/16/2018

About the History of Lumber Grade Marking SPIB has been in the process of archiving some of its historical documents.  In that process, we discovered a rare and treasured story about the history of grade marking southern pine. It begins in 1883 and leads us up to 1940 when SPIB was created. W.D. Durland prepared Continue reading..


All Pine Trees Aren’t the Same: It May be One of Several Species

Date Published 02/16/2018

The term,” yellow pine”, can refer to several pine species or groups of species which tend to grow in similar forest types and yield similar strong wood. In the Western US, yellow pine refers to Jeffrey pine or Ponderosa pine. In the United Kingdom, yellow pine refers to Eastern white pine or Scots pine. In Continue reading..