Volume Calcs

[tonykhoury]

hello, 

Please see the attached sketch. 

I have the following surfaces: "1","2","3","4",and "5"already set up in civil 3d. 

What's the easiest way to calculate material M-A and M-B as shown in the sketch. I am wondering if need to setup a table in excel or there is a way to do it using Civil 3D. 

As always, thank you in advance. 

Tony 

[Joe-Bouza]

creating all the clips and transition surfaces would probably be more work than its worth

[mathewkol · Accepted solution]

This is a pretty easy task.

http://www.civil4d.com/2010/01/surface-volumes-301/

[neilyj666]

You'd need to create sample lines and materials but it could be done

[Joe-Bouza]

Hi Matt

I get most surface algebra but this one has that extra subtraction and I'm not sure I see in the blog how to account for it

Looking at material A; M-A

This appears to be all the material between surface 1 and surface 3. Yet the material must not be counted where surface 2 overlaps. I didn't get that from the blog. How is that accounted for?

The same is true for material B

[mathewkol]

It's all about how you set the above / below values. Specify 3 surfaces and set the aboves and belows properly. In his case, below the flat red line, above the flat blue line, and above the curvy red line.

[Joe-Bouza]

interesting! I was stuck thinking I could only do two surfaces at a time.

Thanks

[mathewkol]

You can add as many as you like. 🙂

[neilyj666]

But it can get very complicated...;)

[Joe-Bouza]

Ya think😳

[Joe-Bouza]

How is that done I only see EG and Datum options

[mathewkol]

I assume you're using a volume criteria. You have to go I to the material properties and add rows in there yourself. I'm traveling this week, otherwise I'd make a video to show you.

[Joe-Bouza]

thanks