AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

1,182 Posts
180 Kudos
Registered: ‎01-07-2011
Post 11 of 13

Re: Anyone using pipes to draw in existing utilities.............

02-13-2013 08:21 AM in reply to: taneum

Gotchya.  Yes, I like utilities as networks due to the Interference capabilities and Profile projection capabilities.


How many road crossings? I think it would be worth it to quickly edit those in through the Pipe Network editor for the productivity reasons above.

Fred Ernst, PE
C3D 2015 SP2
Ernst Engineering
Distinguished Contributor
143 Posts
4 Kudos
Registered: ‎01-07-2005
Post 12 of 13

Re: Anyone using pipes to draw in existing utilities.............

02-13-2013 08:34 AM in reply to: fcernst

Okay so here is what I think will work best for me here.........


I drew in a polyline along my utility.  In this case it some communications lines.  I used the grading function to get elevations from my existing surface model.  I then lowered that line 3' below the surface.  Next thing I did was use the "delete pi" commanding in grading to get rid of probably 2/3 of the pi's.  This left me with about 5-6 segments.  I then created a pipe network from that line and it gave me 5-6 pipes.  I drew those into the profile view and then just turned off all the pipes except the one that actually crosses my centerline.  Seems to be pretty close.


I thought about just doeing 5' either side of the centerline and calling it good but our new sewer is 15' off centerline and I want to see any potential conflicts down the way with utilities so I wanted to draw in the utilities that far out.

Distinguished Contributor
478 Posts
0 Kudos
Registered: ‎11-17-2005
Post 13 of 13

Re: Anyone using pipes to draw in existing utilities.............

02-13-2013 01:44 PM in reply to: taneum

the only time we need to show existing utilities is in the cross sections. so i do the polyline thing but i draw from the cross section sample line/utility line intersection. that gives pipe lengths of 50' (assuming your sample lines are 50'). i convert that polyline to a feature line with elevations only at the verticies. drop it the required depth and then convert to a pipe.  it creates null structures at each intersection which i erase. i have pipe styles set up for each utility. it works pretty well and doesn't use too many resources.

Dell Studio XPS 9100
Intel Core i7 CPU 930 @ 2.8GHz
12GB Ram
64 bit
C3D 2015
Post to the Community

Have questions about Autodesk products? Ask the community.

New Post
Are you interested in helping shape the future of the Autodesk Community? To participate in this brief usability study, please click here. Your time and input is greatly appreciated!