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    Demolition graphics

    Traditionally we have used screened lines for Exiting and black dashed lines for Demo going back to the AutoCAD days. Revit OOTB is set up for this, but it all falls apart a bit because of how line patterns are applied. In AutoCAD a PLine that defines, say, a toilet, will apply the dashed line to the whole PLine as one object, so you actually see the dashes. Revit, however, will try to apply the dash to every segment independently, so fussy features like the curves of a toilet, or all the little segments of a door frame, will just become a solid line. Which can be a problem when your legend specifically says dashed lines indicate demolition. In any case, I have been trying to get my head around a solidly Revit centric approach to the E/N/D graphic problem and have come up with a few ideas.

    1: Demo using a dots line pattern. As we all know, Dots are really dashes (WTF, did no one at Autodesk take Architectural Graphics 101?) but the dashes are really small, so more stuff gets the dashed treatment. Still weak, and looks pretty bad from a simple graphics standpoint. I know, Revit isn't about the graphics, but dammit there IS a limit to how ****** I will tolerate drawings looking. I also refuse to do strip malls and prisons on purely moral grounds, so take it for what you will.

    2: Demo as black lines, but thin lines. Existing is screened, but line weight is the same as new (new feature in Revit 2008 I think). This works well enough, but is not ideal. Also potentially confusing for simple projects where Existing, New and Demo can all be shown together, because there is graphically no difference between Demo and some New items that happen to use a thinner line weight. Stairs come to mind.

    3: Color. Demo in red works nicely. Until the real world of black and white duplication blows it all up.

    4: Two shades of gray. Light for Existing, dark for demo. Black for new. Works ok, but easy to confuse. And if the contractor makes 5th generation copies the drawings are useless. Then again, more than just the two shades of grew are gone at that point.

    5: Poche for existing or demo. Works fine for walls. Worthless for anything else. No way to automatically poche doors, plumbing, casework, all sorts of things that get demo'd.

    Long story short, I have yet to find a solution that I am totally happy with that works for both complex and simple projects. Closest I have come is #1, and I have a library of content with a Profile Spline that takes the dash, which helps. But only works with my own content (not that any out of the office content is anything useful without some work anyway). And Demo plans are in Course LOD to simplify things, which works best in complex projects where Demo and New are not shown together. Projects where Existing and New are shown in Medium LOD and Demo is also shown it would be great to be able to make Demo Course via the Phasing Graphic Overrides, but alas...

    So anyway, curious what others have done here. Especially those who are working in the single family residential/small commercial realm, and dealing with things like stripping finishes and replacing, etc.

    Best,
    Gordon
    Pragmatic Praxis

    #2
    Our deliverables are colour - so we show demo. in a dark red, sometimes solid, sometimes dashed, and advise fidelity will be lost if printed in monochrome.

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