Found a fun fact about CAD layering standards I never knew

I was reading through an old trade manual my mentor left me from the 90s and it said the original architects who set up layer names did it to match physical drawing file cabinets. Does anyone else run into weird old-school drafting rules that still make sense today?

2 comments

2 Comments

charles_coleman1mo ago

That matching physical file cabinets thing blows my mind. I used to think CAD layer names were just random codes someone made up to be difficult. But now it makes total sense why they're set up that way. Back in the old days you'd file drawings by discipline then by sheet number and layers follow that same logic. My mentor had filing cabinets full of vellum and mylar and the numbering matched exactly. Once you see it like that the whole system clicks. Funny how something that seems outdated actually holds up perfectly today.

the_miles1mo ago

Honestly, that file cabinet thing hit me too. I remember finding my old boss's hand-drawn layer legend and it was literally numbered like the tabs in his drawing vault. It's one of those systems that feels clunky until you realize it was built around a physical workflow that actually made sense. Ngl, I still default to that old numbering sometimes because it just works.