http://knowledge.autodesk.com/support/revit-products/troubleshooting/caas/sfdcarticles/sfdcarticles/Represenation-of-structural-beams-in-Revit-floor-plan-views.html
Revit OpEd: "Aaaah,The old invisible line trick, eh "99"?": View Range in Revit proves quite confusing to people at times. An example of such confusion occurs when you model something that exists abov...