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I worked with a couple of Austrians framing years ago, they had learned in the apprentice program in Austria and moved here. They said it’s much easier not to deal with fractions and sorta base 12 math.
Metric plywood is 1200 x 2400
Centers can be
300 it’s around a foot
400 roughly 16”
or 600 around 2’
And the engineering calcs are easier
Roof pitches are x in 10 so as long as you know the Pythagorean theorem it’s basic math.
Most of the world does it except for socket drive sizes which are 1/4, 3/8 and half.
I don’t think we’ll have to deal with it
Posted from my iPhone/Mobile device
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