if you really want to see something that's irretrievably stuck in american measurements, take a look at the national engineering standards and vendor sources fo

if you really want to see something that's irretrievably stuck in american measurements, take a look at the national engineering standards and vendor sources for telecom tower components... for anything from a light duty 40' aluminum self support you might put in your yard for ham radio all the way up to gargantuan 2000' guyed broadcast towers. canada has no hope of doing anything in metric here, everything is in US units, and probably will be until the year 2200