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Diameter of Ring in Section View

Question asked by Justin Eichenberger on Apr 26, 2011
Latest reply on Apr 28, 2011 by Scott McFadden

Alright, so I am creating parts and drawings from exisiting drawings that came from AutoCAD, so the customer can see the parts in 3D.  However, I am having a little trouble with the way they dimensioned some of the parts.  The parts are mostly rings or cylinders, and the drawings all have section views to show the cross-section of the rings.  I want to dimension the diameter of the rings to the line in the section view (see attached image), but I can't figure it out.  I have tried making the dimension in the front view, and then holding shift and dragging it over, but all I get is a red circle with a cross through it.  Are there any tricks to get this to work?  Any help is appreciated...  Thanks.