Again, that whole idea is totally out of the question, Revit doesn't work
anything like that. If you want to build something in Revit that was drawn
in AutoCAD, pin it up on the wall above your monitor and use it to help
you built the thing in Revit. That's it, that's the truth. But yes there are
some exceptions for importing dwg lines.
IFC import/export is really the only choice to get the objects from AutoCAD Architecture into Revit. This method is however going to be somewhat limited. The IFC objects imported into Revit will be Revit objects, but may not behave in all of the same ways you might want them too. It will be limited. Rofs are a good example; a simple hip roof comming in via IFC will be created as 4 seperate slabs. The "roof" in this case will not modify like a typical roof created in Revit would. The 4 slabs are technically "roofs" but that is pretty much where it stops.
If you are goign to need to do significant modification to the geometry imported via IFC you will probably want to consider re-modeling in native Revit objects. If it is to document existing conditions or preform a remodel project of some kind the IFC stuff is probably ok.
I am dissapointed that its not as easy as i would like, but thats life! I just hate to take all that time to re-draw...almost not worth it.
If anything changes let me know!
hate to take all that time to re-draw..
I will give you here a simple key to understanding what you are still
not understanding. This is very valuable for people new to Revit.
You don't "re-draw" anything in Revit. You start virtual construction,
and that is called a "model".
It's possible to just start building a model without any sketch lines
to start from, but that's the same as starting to build the real building
with no construction documents.
With CAD, they drew the lines and then built the actual building from
those lines. With BIM, they draw the lines, maybe with AutoCAD or a
pencil, and then build a virtual model from those lines, that is then
converted into construction documents, from the model.
So now there is a new step in-between.
If you are just building a simple house or something, you may not
need a virtual model. But if you are building a medical center, you
do need a virtual model.
I guess the reason Autodesk bundles AutoCAD with Revit is because
AutoCAD can give us all the preliminary lines we need to start the
Revit model. And there are many different ways to use those CAD
lines to build a Revit model.
I hope this helps you.
Thank you for clarifying. Agreed, Revit is modeling, not drawing. However, he's trying not to "re-build" the model components that are already in 3D CAD. I'm in the same situation. The previous team was more comfortable with modeling in CAD, but when we took over to start DD, Revit is more appropriate for our team. Since both CAD and Revit are from Autodesk, we were hoping the model components (including walls, doors, window system, curtain wall, some furnitures and even overhang, etc.) would be convertable. Even knowing we need to re-build some pieces, it is a bit disappointed to find out they are not as easy to convert / transferrable.
I would simply finish the project that was started in AutoCAD Architecture, using the same software. New projects can be started in Revit, if that is the decision. I don't see why a project from ACA should be converted into Revit. It is not technically possible, but both programs are very capable, why do you bother with the conversion?