Volume calculation

[petelien]

Hi,

i have the area of the bottom of a stockpile, and i have the area of the top of the stockpile, and i have the elevation at the top and bottom. It is 2d geometry in autocad, how can i make this into a solid so i can find the volume of this stockpile. I also have auto cad Civil 3d, if it would be easier to do it in that. i am new to civil, but have worked with autocad quite a bit.

thanks for the help.

[KirkNoonan]

You need to set the lines representing the top and bottom areas of the stockpile at the proper elevations (Z-values). In Vanilla AutoCAD, you can generate a surface between the two polylines. In Civil 3D, it is similar. You create a surface and then add the lines into it as breaklines. Either method will yield a volume. The volume you get using only top and bottom areas and the elevation difference will be the roughly same as doing a quick hand-calculation of the volume using the average end method, which would be much quicker.

[petelien]

which command would i use? i am sure this is looking me right in the face, sorry. Thanks for the help.

[KirkNoonan · Accepted solution]

Use the properties window to change the elevations of your polylines and the Auotcad 'loft' command to create the surface

[petelien]

how can i turn that into a solid?

[Pointdump]

Volume calcs are super-simple on Civil 3d. You just make a base surface and a stockpile surface, then compare them on the Volumes Dashboard. Thusly:

Eric Colburn has a great video Here.

Dave

[KirkNoonan]

http://www.cadforum.cz/cadforum_en/qaID.asp?tip=5117

[petelien]

Thanks for the Help!