Carriageway Surface Volume

[PBriedis]

I am trying to determine the volume of material (cut/fill) for a roadway surface in C3D 2013 using the volume dashboard.

I have created a fictional surface, basic profile and assembly so I can compare my calcs with C3D. After creating my surfaces and running the dashboard calcs, the program calcaulted the correct cut/fill volume. However looking at the surface in iso, I saw that additional surfaces were produced around zero elevation - refer to attached snapshot

In my actual model, I am well above zero elevation but these additional surfaces could cause problems on other projects. Any thoughts on what C3D is doing and how to fix this?

Thanks

[MikeEvansUK]

This is as expected, the aditional surface should be the Volume surface.

It should have a variance in levels based from 0.00, positive being fill volumes negative being cut volumes. If you look at the surface properties this varience will be declared as being minimum & maximum levels.

[neilyj666]

...and they won't cause any problems on this or other projects apart from bloating your drawings so use sparingly or use data shortcuts