I started my apprenticeship as a boilermaker about 15 years ago where I noticed qty notes on our drawings said "5-off" or "10-off", for example "5-off as drawn, 5-off opp-hand".
I remember thinking this wasn't correct English, and should be "of" instead of "off" but it wasn't my place to comment...
I am looking for a book on GD&T and am not sure if the ones that usually come recommended online will be suitable in Aus since they are based on ASME Y14.5-2009 which I don't have access too either.
Is anyone outside of USA able to recommend a book and/or applicable standards that I can...