this post was submitted on 18 Jan 2025
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[–] anomnom@sh.itjust.works 17 points 5 months ago (9 children)

What’s even more annoying is that a 2x4 (pronounced two-by-four) isn’t 2 by 4 inches. It’s 1.5 x 3.5 (sometimes even a 1/16 under).

It’s all because of some unfinished lumber bullshit, but it’s still not as confusing as pipe and hose fitting sizing at least.

[–] dx1@lemmy.world -2 points 5 months ago* (last edited 5 months ago) (5 children)

It's because the actual cut is 2x4, and the wood shrinks. The typical shrinkage is known and accounted for. It is a treat when a house has an actual 2x though, i.e., it was cut divided by the shrinkage ratio, or cut dry. Related to why framing is done "on center", i.e., "16 on center".

[–] fallingcats@discuss.tchncs.de 3 points 5 months ago (1 children)

You can't convince me that wood shrinks by 35% by crossection. No way.

[–] dx1@lemmy.world 3 points 5 months ago

Yup, that was wrong.

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