AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

Posts: 4
Registered: ‎07-13-2012
Message 1 of 3 (264 Views)

Adding Building levels to existing ground

264 Views, 2 Replies
10-12-2012 01:31 AM

I have an existing ground surface with all different z co-ords and im trying to add three proposed buildings to my exisiting ground with all the builidngs having a level of 32.5 as a minimum, however at some points the ground is higher than 32.5 and I only want to raise my existing ground to 32.5 within the proposed buidling layout if it is below 32.5 as im doing a flood calculation. What do i need to for this? Thanks.

*Expert Elite*
Posts: 9,250
Registered: ‎06-29-2007
Message 2 of 3 (261 Views)

Re: Adding Building levels to existing ground

10-12-2012 01:44 AM in reply to: JAY25



I would do the following steps:

  • create a user-spezified contour at 32.5
  • extract that contours to get polylines (command _AeccSurfaceExtractObjects)
  • copy your EG-surface
  • use the extracted contours to make islands in the copied surface
  • now you can raise up the copied surface


HTH, - alfred -

Ingenieur Studio HOLLAUS ...
*Expert Elite*
Posts: 5,086
Registered: ‎12-15-2008
Message 3 of 3 (229 Views)

Re: Adding Building levels to existing ground

10-12-2012 03:24 PM in reply to: JAY25

Changing existing ground is a sure way to make any grading problem go away :smileywink:


Surley I jest, but typicaly we don'r change existing ground we build on it and cut into it - two different models. Then they can be combined.

Thank you

Joseph D. Bouza, P.E. (one of 'THOSE' People) Civil 3D 2012 & 2013
HP Z210 Workstation
Intel Xeon CPU E31240 @ 3.30 Hz
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Note: Its all Resistentialism, so keep calm and carry on

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