http://www.aaa3.net/how-to-scale-autocad-drawing/

Autocad Question?
I have Autocad 2008 and I want to design houses and I need to know how to set the scale so that when I draw a line and tell it to be 15′ it is scaled where 1/4″=1′. thanks
I’m not for sure about ACAD 2008. But in ACAD 2006, once you go through the drawing setup wizard and get on the drawing board, here’s what I do: Go to menu – format – scale list. Then choose your desired scale from here.
How to scale an object in AutoCAD