Importing gbXML/ using IES Plugin in Revit

IES's specially developed Revit plug-in Toolbar allows Revit Architecture and MEP users to import their 3D BIM model into IES's software and undertake sustainable performance analysis.
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derekyu
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Importing gbXML/ using IES Plugin in Revit

Post by derekyu »

I don't know what I did wrong here.

In Revit, I created spaces. Floor to floor heights. I let Revit determine which walls were exterior etc. The only thing I specified was the room/ space height. Rather that set the height as the bottom of the slab, I assigned it to the floor above.

When I select "import model" with the Plugin (oops, I am using Revit MEP 2010), I get a model room check window. In it, it indicates "problem" areas. For some reason, my spaces are full of holes (literally).

When I tried exporting the revit model as a gbXML and importing it in ModelIT, I still have the same issues.

What are my solutions here? Outside of going into each space in IES and deleting the holes.

Thanks for your help.
derekyu
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Joined: Mon Apr 05, 2010 2:03 pm

Re: Importing gbXML/ using IES Plugin in Revit

Post by derekyu »

Well, this much I've figured out, the Architects haven't completed the model. I'm missing floor slabs in some areas (that would attribute to some holes I guess).

Yet, when I assign a space and set the room height, does that not assume that there is a ceiling/ roof at the top?

Also, does it make a difference if for the walls, the arch. model just has one type of wall for the entire building? For their construction, there is no exterior wall vs interior wall. It's all the same wall. My thinking is that this shouldn't make too much of a difference for initial calculations as any wall not next to a space/room would be assumed an exterior wall.
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PCully
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Re: Importing gbXML/ using IES Plugin in Revit

Post by PCully »

Hi,

1. Holes at top or bottom of the room when you export to <VE> indicates the space is not bounded by floor or ceiling/roof elements. I think you already worked this out. If the space element isn't bounded by a roof (for example if you have set the Space upper limit to be less than the height of the roof) then you will find the room is exported with a big hole where there should be a roof. To correct this you just need to make sure that all spaces are properly bounded by floor and ceiling/roof elements (also make sure these are "room bounding").

Also you should double check that your Room and Area Settings in Revit have "Calculate Areas and Volumes" ticked before you export.

2. The wall elements used by the Architect won't matter for export to <VE>. As long as they are room bounding then the information we need to build the analytical model is there.

Note: It would affect the inner volumes as all of the walls would have the same thickness but unless you were modelling in Revit with the intention of using this feature then I wouldn't worry too much about it. It sounds like you are only interested in getting the basic geometry through to <VE> from Revit so I wouldn't spend too long on this.

Further details (and explanation of some of the terminology I've used) can be found in the latest White Paper, download it from our website here http://www.iesve.com/content/mediaasset ... idance.pdf

Phil
IES Worldwide Technical Support
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