Forums >> Revit Building >> Technical Support >> pick walls to create floor

Hel01

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Joined: Tue, Apr 3, 2012
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Im trying to create a floor using the pick walls command but Im unable to select any lines...Iv exploded the cad file that im using to pick lines from, but this hasnt helped, was that the correct thing to do?  to make the Cad file live in the drawing? any help much appreciated, cheers

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WWHub

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Joined: Tue, May 16, 2006
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It is always a BAD thing to explode a CAD file.  If you want to do that, you should do it in another blank project so that you can clean it up and then transfer to your project.

You don't need to explode a CAD file to pick lines from the file.  Obviously they are lines so the pick walls will not work.

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Hel01

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Ofcourse..i was getting totally confused with the cad walls and forgetting I hadnt yet drawn the walls in Revit yet. Cheers for that, really appreciate it. I shall undo the explode now too!

thanks again

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WWHub

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Be aware that CAD may not be accurate ... at least not to Revit standards.  In Revit, we want parallel walls to be parallel but not necessarily so in CAD.  So if your CAD lines will dimension OK face to face, you will be OK but be forewarned that they may not be and the angles may not be 90 either.

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Hel01

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Im having a problem now with getting a closed loop when i select the walls...iv got solid walls meeting curtain walls and they dont seem to align/create a closed loop so im unable to create a floor. Would I be better of just drawing in a floor outline in this case or is the "pick walls" command the most accurate way of doing things? cheers

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WWHub

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Just edit the linework as required.

BTW - Does your floor really sit inside your walls?  If not, then you should adjust accordingly.  Wood framed residental walls, the floors go to the inside face of the sheathing.  If you do your floors right, they will automatically cut your outside walls at bearing conditions.

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