Lumber dimensions inch / cm

[verktygsgurun]

Now, it so happens that there were two different inch measurements, verktum or Swedish inch = 24.74 mm and English inch = 25.4 mm. The so-called brägårdsmåttet referred to the English inch. Since the mid-50s, 25.4 mm is internationally recognized as one inch. But the two different inch measurements might explain why it's often rounded to 25 mm.

If I remember correctly, folding rulers marked with verktum were available for purchase well into the 60s.

Nowadays, measurements are never stated in inches (except for TV screens), but rather, for example, 45x95 for a planed stud and 50x100 for a sawn one.

If I remember correctly, this caused problems once when Sweden exported train locomotives to England in the past. The locomotives didn't fit the tracks in England. Expensive lesson!!

 

[joflopp]

joflopp, you need to correct your post on the discussion page, you wrote about 2 x 8 that "It should be 50x100 and 45x195 planed"

Well, sometimes it goes a bit quickly when you're trying to manage work at the same time.

 

[Faidros]

Yes, if we are both going to hang out here and start editing on Wikipedia, it will probably be difficult to manage the job.

 

[John J]

oops what things one starts..

 

[andersmc]

As a curiosity, it can be mentioned that the idea of an inch always being the same size is a relatively recent invention. It was actually a Swede, C.E. Johansson (the one with the gauge blocks), who established that an inch=25.4mm.