Though each is a form of Imperial measurements, a scale factor of 12 or 1/12th is necessary to exchange drawings inside or outside the building. At that stage of my career, I had not yet learned civil engineering drawings (in the US) are typically prepared in decimal feet whereby building plans are usually developed in inches. Using AutoCAD 2000, I remember struggling to figure out what scale to insert the first civil drawing I received into the MEP drawing I was working on. Veteran AutoCAD users likely recall a time when there was no such thing as Insertion Scale. Though it may seem like a curse, the good news is the counter-spell is an easy fix. Get it wrong, and you’re cursed with a riddle of why AutoCAD objects scale to seemingly random sizes when inserted into a drawing.
Get it right, and the results are magical.
The AutoCAD Insertion Scale is a mystical creature.
