"Griftin" wrote in message
news:14302431.1072716637009.JavaMail.jive@jiveforum1.autodesk.com...
> So, it is not possible to use ABS without knowing ADT?
>
> hummmm, I can't open an architectural floor plan that is "out-of-the-box"
AutoCAD-2004 and start drawing 2D-double line
> duct usinf ABS?
Actually you can (3-d; there is no 2d double line duct), but you are going
to have thousand unanswered questions. Knowing ADT will give you an idea
what that thing is about. At least start with the manual and then you will
have another thousand questions to which there is no answer in manual,
either. The tutorials are poorly written and they are by no means
exhaustive.
sp