Pipes, structures and invert location question

[bcolonXQE5F]

Hello!

  I am writing to ask for your help.  I am working on the design of a culvert of 2 pipes of 72 inches in diameter, in parallel and both end in a headwall of 0.20 m thickness.

  When I use Civil 3d to place the headwall structure and pipes in both, the plan view drawing and the cross section view, notice that by default, Civil 3d places the elevation of the invert of the pipe at the midpoint of the headwall.  Therefore my questions are:

  1- How can I tell Civil 3D to place the pipe elevation invert, exactly at the exit of the head wall and not in the middle?

  2- How can I change to 0.20m, the thickness of the head wall that Civil 3d brings, which by default had a thickness of 0.305m?

  3- When I check the information in the program's help, i notice that by default Civil 3d calculates and places the elevation of the crown in the pipe upper part, but inside the pipe.  But as I recall from what i learned in school, the crown of the pipe, is the point upper on the outside of the pipe.  I am right?  If so, why does Civil 3d calculate it inside the pipe?

  Is there a way to change this?

  Thank you very much for the information you can provide me.

Benjamin

[Civil3DReminders_com · Accepted solution]

 1- How can I tell Civil 3D to place the pipe elevation invert, exactly at the exit of the head wall and not in the middle?

You cannot unless you create a structure rule that controls this. 

  2- How can I change to 0.20m, the thickness of the head wall that Civil 3d brings, which by default had a thickness of 0.305m?

One would need to create a custom pipe rule (or structure part) that would adjust the structure part to swap out the part to the desired value. 

  3- When I check the information in the program's help, i notice that by default Civil 3d calculates and places the elevation of the crown in the pipe upper part, but inside the pipe.  But as I recall from what i learned in school, the crown of the pipe, is the point upper on the outside of the pipe.  I am right?  If so, why does Civil 3d calculate it inside the pipe?

Why would you expect Civil 3D is smart? Civil 3D follows the rules, Civil 3D hasn't been improved in over a decade, and Civil 3D sucks in modeling real world values. Often in Autodesk University sessions users ask how can Civil 3D show the real world dimensions and the answer is often why would you want to show this? Civil 3D sucks as a digital twin and Autodesk doesn't appear to want to make an awesome product. Past questions to make it awesome are dismissed as not needed and you should expect the **** output Civil 3D currently provides. 

  Is there a way to change this?

Create your own program or own Part Rules. 

You can find info in the Civil 3D Help API or this AU session in 2007

https://forums.augi.com/showthread.php?149331-CV304-3P-Supercalifragilisticexpialidocious-Sewer-Desi...

[bcolonXQE5F]

Well that leads me to conclude that any drawing of a culvert or other pipe that i will make with the Civil, needs to be reviewed and edited by hand in autocad, because the total length of the pipes is not going to be correct.  Maybe 6 inches short on both ends for a single pipe it is not a big issue, but in my case, for 10 pipe culverts, it can create an underestimated construction bid item. Thank you for recommending me, the topic of the parts rules, I'll have to read a lot to know how to apply this concept.

Thanks!