U.S. Department of Commerce

Baker’s dozen = 13 (not 12)

Easy.

Foot = 12 inches (the length of the average man’s foot)

Of course. I learned this in the second grade.

2 by 4 = 1.5 inches by 3.5 inches  

What?

4 by 4 = 3 ½ inches by 3 ½ inches

No way.

5/4 inches by 4 inches = 1 1/8 inches by 3 ½ inches

Mind. Blown… unless you’re a carpenter or in the construction industry.


In the United States, softwood lumber is governed by the American Softwood Lumber Standard which was developed by the American Lumber Standard Committee, in accordance with the Procedures for the Development of Voluntary Product Standards of the U.S. Department of Commerce. That’s a mouth full. However, the lumber standard is a government-approved codification of longstanding industry practices. And, while dimensional lumber is cut to a specific length, width, and depth, there is a difference between the nominal size (what the lumber is referred to) and its actual size.


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