AutoCAD Civil 3D General

Posts: 18
Registered: ‎01-22-2008
Message 1 of 4 (191 Views)

2012 Material Volume calculation error

191 Views, 3 Replies
01-04-2013 09:14 AM

 We are having an issue with a material volume being calc'd incorrectly


It only seems to happen when our corridor models proposed surface is above the existing ground.

The comparision is being made from the Datum link of the model to the Base3 link, which is our definition of Grade A fill.


The datum surface is created using the bottom links overhang correction and the Base3 surface is defined as Top links (nothing changed when I switched it to none)


The table material is set to Fill using above Datum surface and Below Base3 surface.

It seems to work in areas that the template surface does not cross the exisiting surface line, once the proposed surface breaks the existing surface the material calculates above the datum to below Base3, then from Base2 to the exisiting ground surface.


material defintion does not refrence th existing ground surface or the Base2 surface but still seems to be using them for targets i those certain conditions.


Any help or insight would be appreciated.






*Expert Elite*
Posts: 2,456
Registered: ‎12-18-2002
Message 2 of 4 (165 Views)

Re: 2012 Material Volume calculation error

01-04-2013 04:41 PM in reply to: jkier

What results do you get if you run the corridor with the surface targets turned off or does your Base2 surface extend out that far?


Optionally, remove Datum link code from Daylight subassemblies.

Tim Corey, Owner
Delta Engineering Systems
Redding, CA
Autodesk Authorized Value-Added Reseller
Posts: 18
Registered: ‎01-22-2008
Message 3 of 4 (156 Views)

Re: 2012 Material Volume calculation error

01-05-2013 05:23 AM in reply to: jkier
I don't have a surface created for the base2 links, which is the real head scratcher.
I can't remove the datum link from the daylight assemblies, its being used to calculate an additional quantity.

I may have to create a subbase surface the compare to base3 which would ignore the datum of the daylight
Just looks like this is a bug in 12, I may try running it in 13

Posts: 18
Registered: ‎01-22-2008
Message 4 of 4 (104 Views)

Re: 2012 Material Volume calculation error

01-10-2013 11:40 AM in reply to: jkier

I'm now having the same issue without the proposd template breaking the existing ground plane on on another aligment

Seems to be a softwre glitch

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