Forums >> Workflow & Implementation >> Hardware >> The Performance Ceiling of Revit

Schmidty2770

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Joined: Mon, Feb 11, 2008
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Does anyone here know exactly what the ceiling of revit is? What is the square footage at which things begin to crash? I've heard numbers like 500,000 to over 1.5 million which is a pretty big discrepancy. My company is looking at upgrading to Revit which will require a jump in our computers as well. I'm wondering about how big the file size for a project will be. for an example: a 5 story building  with about 250,000 square feet? Thanks for the help guys.

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brettgoodchild

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Joined: Sat, Feb 4, 2006
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Hello Schmidty2770,

Revit can pretty much handle what ever file size you need when used properly.

There is a whole series of best practices that you should be aware of that when followed should make your Revit implementation go rather smoothly.

I have personaly seen a file exceed 600 mb... which is rather large, but I have seen a 200mb file out perform a 50mb file.

Again, it depends on how the software is being used and how well the computer can use it. 

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Schmidty2770

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WWHub

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Schmidty2770,

I think your question is too simple to answer.  Building SF would not be the limiting factor for REVIT.  brettgoodchild has probably answered as best as he can.  Complexity is the limiting factor but only in relation to the operation at hand.  Rendering very complex models takes more time then simple models but if you limit the area to render, complex models can render quickly. 

So it is with most of REVIT.  If you limit the information that has to be considered during any specific operation, I don't know what REVIT's limits would be.   The trick is to understand how to control the information your system and the program has to deal with by deciding what to model, how much to model and using VG and worksets.   

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NKramer

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Joined: Tue, Oct 9, 2007
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The biggest killer is dealing with messy/ bad modeling practices. I just finished up a 35k ft² building with a file size of 60-90megs (depending on the purge). That file out proformed the 35-50 meg, 18k ft² building that I am helping to finalize now. The obvious difference is that the 30k building had about 10 errors and the 18k building has almost 400.

Those 400 errors are due to tracing over a sketch up model, lines not being parallel, not useing best practices for design options and phasing, etc. As it stands now I try to fix a few every da, but it would take me a week of trouble shooting to fix them all and we dont have the time. So in the long run the model will probably always be cluncky and less informative. Granted its the first Revit project for the team I am helping out, but you really need to be proactive on learning how tos and what not tos. Which is really where Revit city and Augi come in.

Ask before you do There may be a better or cleaner way of doing it.

Also to go back to the original intent of this post, Revit starts to have calculation errors if you go outside of a 2 mile radius. I would imagine the same would be tru for the vertical, but then I would like to see a building that was 2 miles high even if it was half below and half above ground. If your building is to big you may want to consider splitting it up amongst files. This could end up creating more problems in the long run as you cant reference details from other projects, etc. But I would definatly split up multiple buildings into multiple files.

HTH 

Nick 

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