As long as you know the dimension of one thing within the drawing (the overall length of a wall, the width of a door, etc.) import it as you're doing and then just do an Enlargement (Edit/Enlarge/(set the center)/Enlargement/Cal. Dist.). If you're trying to do it when you import it you'll have to play around a little - it could be by a factor of 12, but then it could also be by a factor that is some wacky number too. With the Enlargement trick you have full control over what you're using as the control dimension.
Alan T. Hendry, RA
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