• jrbaconcheese@yall.theatl.social
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        1 year ago

        No they aren’t- they are allowed by their respective grading agencies to be scant of truly 2” x 4” because they are most often dried after sawing, which causes them to shrink.

    • Fuckfuckmyfuckingass@lemmy.world
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      1 year ago

      What do mean no one knows why? It’s to use less lumber. Back when there was unlimited old growth timber they used true dimensions at the mill, even extra dimensional, I’ve seen 2x4’s that are closer to 3x5.