this post was submitted on 18 Jan 2025
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I had to go back and re-read the history of dimensional lumber. 2x4 was an actual 2x4 cut until recommendations by the Forest Products Laboratory (American Lumber Congress?) in 1919 to balance functional and economic requirements (1 5/8 x 3 5/8). It's neither the shrinkage nor just milling after drying, they literally just cut it smaller. And if my last 20 trips to big box stores with lumber are any indication, they don't care about cupping or warpage either.
Yeah whenever I need lumber I plan to set aside at least half an hour to dig through the piles to find OK boards.