Quote:
Originally Posted by Qbot2640
No...think of it this way: Draw your frame perimeter from above, then "offset" or project that perimeter 20 inches farther out (perfectly concentric with the frame perimeter). That offset is your "extension zone".
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Here's a quick* example. The inside shape is your frame perimeter and the outside shape is your extension boundary. As long as you stay within the extension boundary, you're fine.
*112" rule was not taken into account while making frame perimeter.