I've actually worked in the construction industry in New Zealand, which was thoroughly metric when I was building houses ~10 years ago.
And we did everything in mm, standardised timber was "100x50" - mm was assumed, which was close to 2x4 Inches.
(Actually, I think the finished standardised timber is smaller than 100mmx50mm, but for some reason was still called 100x50)
sheets of Gib plaster (Drywall?) were 1200x3600,(possibly 1600x.. I don't remember) sometimes bigger. rooms had 2400mm or 3600mm stud heights.
90mm nails were used to assemble the house frames, and 50mm nails were used when the 90mm nails would have been excessive.
We only really used Meters when we were being vague - "Go about a meter further out!" and usually converted to mm when we were actually cutting or fastening something. I never poured any concrete myself, but I'm pretty sure the foundation boxing would have been measured out to the mm, even over 10s of meters of distance.
If I ever gave someone a measurement in cm I'd get told "Only Dressmakers user centimeters!" I don't think I ever used feet, and I only ever used inches when discussing lumber, and would always be told to use metric.
And we did everything in mm, standardised timber was "100x50" - mm was assumed, which was close to 2x4 Inches. (Actually, I think the finished standardised timber is smaller than 100mmx50mm, but for some reason was still called 100x50) sheets of Gib plaster (Drywall?) were 1200x3600,(possibly 1600x.. I don't remember) sometimes bigger. rooms had 2400mm or 3600mm stud heights. 90mm nails were used to assemble the house frames, and 50mm nails were used when the 90mm nails would have been excessive.
We only really used Meters when we were being vague - "Go about a meter further out!" and usually converted to mm when we were actually cutting or fastening something. I never poured any concrete myself, but I'm pretty sure the foundation boxing would have been measured out to the mm, even over 10s of meters of distance.
If I ever gave someone a measurement in cm I'd get told "Only Dressmakers user centimeters!" I don't think I ever used feet, and I only ever used inches when discussing lumber, and would always be told to use metric.