ISOLATE ROOF STEEL TO EXPORT TO DWG

[asherjoh]

I am a light user of Revit. I just use it enough to export the structural steel to AutoCad. When I export the steel, all the roof and level steel is put on the same layer in Autocad. When I am in Revit and I select a piece of roof steel, it says roof. And when I select steel from the second floor, it says level 2. Is there a way I can put the roof steel and second floor steel on different layers? This will save me hours of work. Other wise I convert it to dwg, then try to navigate the drawing trying to identify the roof steel then change the layer.

[Anonymous]

Are exporting to 2D or 3D?

If 2D you should look at setting up different plan views in revit with different view ranges. This way you will only export those model elements that are in that view.

You should also look at the DWG export options which effect layers. The defaults is AIA standards.

If it is 3D you are looking for than I don't know.  You can also isolate certain categories in the view using Visibility Graphics or the temporary isolate.  

[asherjoh]

I need 3d.

[Anonymous]

are you exporting as polymesh or ACIS Solids?

[Anonymous]

I think your best bet is to use the DWG export options and then use layer modifiers.  You can add {level} as a modifier.

[asherjoh]

Not sure. I'm just exporting to dwg. I tried to save to aci but cant open the file.

[asherjoh]

I don't see all the options you are showing.

[Anonymous]

click on the ... button next to the "select export setup" drop down. You can then save the options for later use and the saved setups will show up in the dropdown. You can also get to the option by clicking the "R" going to "export" scrolling down to "options" and clicking "dwg export options" (see images in early post)

[asherjoh]

Polymesh. Not sure of the difference.

[Anonymous]

There is not a huge difference. Just might effect how layers are assigned. I can't seem to get the layer modifiers to work in a 3D view. Even though I know that the 3D view uses projection lines. If you have AutoCAD Architecture you can import an IFC file into it, which would have more info attached to model elements.
https://knowledge.autodesk.com/support/autocad/troubleshooting/caas/sfdcarticles/sfdcarticles/Import...

[asherjoh]

It looks like the steel is on the same layers. But when I click on a piece of steel, it show a different name e.g. roof steel or 2nd floor steel. Not sure I can export the steel layers differently.