this post was submitted on 24 Jan 2025
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A 2x4 stopped being a 2x4 so long ago, and keeps becoming less, we might as well measure them in metric now
There's a joke to be made here that the Amish still use actual 2x4's, but it's a bit dated.
2x4 has always been the nominal, unplaned dimension since forever.
You are making me show my age now. When I renovated homes 30+ years ago the studs were sawn 2x4 with sharp corners. The replacement stuff was like 1.75-1.875 x 3.75 the new ones at the stores now are like 1.5 x 3.5.
Yah, I just moved an old farmhouse (1962) to another quarter section on the farm, and all the old structure was that square planed stuff, but it was finished 1.5x3.5. I think that's what came out of the one-off mills around a lot of these places at the time. The smoothplaned stuff was kept in the city.
Yeah looks like pre 60s going back to the 1920s it was sawn to 2x4 inches. There are some standards online per time range. Also found most stuff we worked on pre 50s was hardwood. Trying to cut old studs in some places was a nightmare for our blades. That or it became petrified LOL.
Fir. That old douglas fir dries hard as nails. Old barns are all nominal thickness and if you buy boards for livestock pens, they'll all be roughcut full dimension still.
Metric is more precise.
Fight me.
/s
Part of my work is with manufacturers and dimensional drawing info. Inches can be precise but some North American industries insist on fractional rounding on drawings (as a tolerance signifier). Then they chase QA stuff on why the assembly doesn't go together per the print. It frustrates me...guys just used decimals!