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Forums >> Community >> The Studio >> To revit or not to revit?
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Joined: Mon, Nov 28, 2005
2 Posts
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I’m in my final stages of evaluating Revit to see if is for us. As for now, I can conclude that Revit is an extremely powerful design and construction documentation software for about 90 % of building types varying from residential suburban houses to large scale projects like hospitals. Revit is fast, intuitive and has even impressed colleagues that have 15+ years working and design in 2d. Every software has its advantages and disadvantages, but I do have my doubts. As we are a firm that gets some of our commissions through competitions, where wacky innovative designs are sometimes needed, I ask myself if Revit can handle it.
Here is a case scenario. Sometimes we design double curved shapes in a 3d application, fix it up, materialize it and render it for presentations. We then, cut the geometry into slices and import it as a flat 2d outlines in AutoCAD and make plans, sections, elevations. As you can imagine this process is very difficult, because you always lose some geometry in the translation, errors are very easily made in the coordination, you can’t always draw elevation and sections precisely. There is always some tracing and estimations going on in AutoCAD to try to get the 2d drawing to look as closely as the renderings. Revit would be an ideal tool to cut down in man made errors, and increase the design process time. I know that Revit doesn’t have the modeling tools like other 3d models, but has the options to import geometry. We have done this and we haven’t had any satisfying results so far. 9 out of the 10 times, we got error messages, stating that the geometry is not a solid or Revit can’t use faces to convert into roofs, floors or walls. If we are lucky and it does get it imported as .sat or .dwg, not all tools from the building maker works. We get messages like, “can’t make roof or floor” Sometimes the curtain wall does work but we get chunks of scattered glass pieces with gaps in between. But the biggest problem is that any geometry we import regardless, Revit slows down extremely even on a 2GB memory workstation.
My second big concern is that Revit wants you to work in a way that standard orthogonal buildings are made. For example. Sometimes my wall flows into a floor and becomes a roof, using the same material that also bends in two directions. You can make a mass and extrude but you lose the host function of a wall. If I try to keep the host function, it tells me that walls cant be floors or floors cant be walls due to the angle. Also windows components can be tilted either in a vertical. You would have to use a sky window in an inclined roof that is supposed to be a wall, but doesn't register as a wall because it is a roof. Revit tells you that vertical roofs don’t exist and so on. Windows in walls will not rotate either (wall as rotate axis) Also a simple thing as a curtain wall that with curved glass and mullions doesn’t exist or indiivual mullion angles in certain walls. You can make an in place family which is not the problem, but the whole point is its BIM and parametric funtions that you dont want to lose.
1. Can these problems (especially the import problems) be solved in Revit or is Revit just not a software for these type of projects?
2. Is there a particular workflow or work around in the mass modeling section to still come up with nurb like shapes? These shapes are not only for building components but also for furniture. I prefer to model directly in Revit. This keeps my models clean and fast.
Here are some images of projects found on the internet that addresses these problems
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Joined: Mon, Nov 28, 2005
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Some more images
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