Conduit parameters are not applied to importet conduits.

Hi all. I have created a box shaped conduit (duct), and have input the minimum bend radius, minimum cover etc. When I extract utilities from graphics (extracting from a 2D linestring and using a terrain model for elevation), the conduit is clearly not following the minimum bend radius or ground cover. I exctract from the terrain model with a certain vertical offset, and when ever the line crosses the terrain model it is placed with that vertical offset. But I can't seem to get my conduit to follow the minimum bending radius after I have created it from graphics. I don't know if there is an option to recompute it's parameters after I have importet it, since it is dependent of the terrain model. And I can't seem to give the pipe a vertical curve.

Any ideas on what I could be missing?

Thank you in advance. Jan Nielsen