TLDR: Stop using All Caps.
Perhaps you as well as the rest of the construction industry (I'm in the UK and it's the same here) should consider doing away with All Caps altogether?
I'll provide some bedtime reading, below, for why you should do this but consider why we use All Caps on drawings:
Drawings were initially hand drawn and All Caps was used to ensure clear lettering no matter who was writing it. Then we moved to computers for creating drawings and everyone carried on doing what they were doing and printers/copiers were not of the quality we are used to today so it was still necessary for extremely clear annotation.
Fast forward to today - printers provide crisp, legible lower case text at minute sizes and yet we still do everything in All Caps. I truly believe it is a hangover from when it was necessary and it is unnecessary now!
On top of all of this, as below, All Caps is harder to read than Sentence case!
https://en.m.wikipedia.org/wiki/All_caps
https://uxmovement.com/content/all-caps-hard-for-users-to-read/