Lumber Grade-Marking History: 1920

For determining lumber grades in dispute, the Inspection Department, which applied grading rules and standard specifications, performed valuable and indispensable service. Of 1,448 claim inspections, 628 were made at the request of non-members of the Association, who paid the per diem fee and all expenses for the inspection service.

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Lumber Grade-Marking History: 1919

1919 was another year that left an incredible mark on the globe, and particularly on the United States. In July, the United States Army sent a convoy across the continental U.S. to see whether or not it would be possible to cross all of North America by road. This particular effort took many months to complete and was woefully inefficient, but because of it, the U.S. Highway System would be born.

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Lumber Grade-Marking History: 1918

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.

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Lumber Grade-Marking History: 1917

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 Germany, something that would act as the starting point for a lot of the conflict born in the coming decades.

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Lumber Grade-Marking History: 1916

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 been stored and cooled.

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Lumber Grade-Marking History: 1915

About the History of Lumber Grade Marking SPIB has been in the process of archiving some of its historical documents.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 […]

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Your Rules Writing Agency for Southern Pine

How was SPIB formed? The Southern Pine Association was formed in 1915 to provide a common set of grading standards for the industry. Prior to the formation of the SPA, each regional pine association published their own grading rules using different grades and sizes. With the advent of World War I, the Department of Commerce […]

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Density of Wood Blog

Density of Wood

What is density of lumber? In a general sense, density is defined as mass per unit of volume. For lumber, that could be given in units of pounds per cubic foot, or expressed as specific gravity (or relative density) where the density of the lumber is divided by the density of water (also in pounds […]

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