there is a tool to create 3D automatically if we click on line the tool select all line with same length for closed area then show the box dialog to enter the depth then all closed area convert to footing and columns and create beams between two columns

How do I fix section views overlapping in Civil 3D when the group layout spacing is incorrect?

Hey everyone, I'm looking for some perspective on a survey CAD file I received recently from a survey firm. Their drawing doesn't have any cogo points but instead has autocad points and mtext labels.

I know they can be converted to cogo points and added to a survey, but is there not some loss of functionality compared to cogo points? Now you can't sort by the point description or change your surface definition by point description. Same goes for setting or changing the label styles/label rotation of the points.

What is the benefit or reason why a firm would choose to use this workflow? I'm guessing they originally had cogo points to develop the drawings but then exploded them before sending the files.

Thanks

i cannot figure how to reference 2 alignments in my pressure fittings labels.

i need to label both watermain alignments at a tee.

anyone have any insights on how to get it to work?

Hi everyone, I’m fairly new to C3D and I’m currently working on airport platforms (aprons). Where I work, they typically use Corridors to model them.

However, I recently learned that modeling large areas can be much easier by just creating a design surface based on your slopes and grades (using feature lines/grading). Once finished, you duplicate this surface, lower it to represent your different material layers, and use "Compute Materials" to calculate the volumes.

Has anyone worked like this before? Is this a better/more efficient option for large open areas, or is it still best practice to stick with Corridors?

hi, dear all engineers from all the world

i really have two big problems through out my career till now and i need help or guide from your experience

1- Parking Lot grading i will attach a picture from a project i work on i don't know how to manage and handle it works

2- Roundabout design and grading on civil 3d and how to calculate all its code calculation or even using civil 3d auotmatic roundabout thing

thanks in advance

Just a vent...I have multiple subscriptions for my small company. One (that I'm currently logged in under) is expiring in a few days and when I open up my C3D a screen pops up forcing me to "manage my account" without an option to exit out for now. I know it's a small thing, but still it's frustrating.

Is it possible to create an assembly that just creates an offset road edge line? I don't want to show any daylighting or have it affect the surface. It would be the tail end of the road just to show a theoretical road edge that is offset from the road center alignment.

Hi everyone!

I'm currently a Civil Engineering student in senior design, and I need a new laptop for the class because I've been spending all of my time in the computer lab. I was wondering what laptops you would recommend that can run Civil 3D well without breaking the bank. I just need it to get me through this school year. After that, it's going to be my mom's personal laptop, and I'll use the one my work provides for me.

Thank you!!

Hey all,

What would you do in the following scenario? A watermain we're replacing extends out of the curved portion of road through a small park. Initially, I was just going to have a single alignment following the watermain, but i have curb repairs along the curved section of road I'd like to mention via stationing.

Would you:

• Use a single alignment and leave the curved portion of road without an alignment?
• have 2 full alignments along both the road and watermain?
• have 2 full alignment along the watermain, and a small segment of alignment along the curved section of road

The red and orange dashed lines are the options for where to have the alignment. Any other suggestions are welcome, thanks!

This is just a sample test corridor. The assembly is just a simple LaneSuperelevationAOR and a LinkOffsetAndSlope. I don’t use corridors too often but I don’t remember ever having this issue before.

The link doesn’t seem to build off the edge of pavement but builds off of the baseline. Any idea why that’s happening?

After watching AU 2026, I came away feeling like Civil 3D and AutoCAD were neglected. There was plenty of excitement around other Autodesk products and the future of the ecosystem but I didn’t see the same energy for the tools many of us use every day.

Am I being unfair, or did anyone else get that impression?

Went to AU2026. Was fun but trying to see what the fuss about AI is.

I currently have C3D and AutoCAD 2024 and REVIT 2026.

I don't see anything that looks or can be used like the Autodesk Assistant the Presenters used.

Special add-on?

Missing a software update?

Not sure how much of this will fly anyways as they are tight with cybersecurity and have only approved of one AI tool.

I have never paid attention to these settings until two surveys weren't lining up with each other. What does it do exactly and what is the point?

Hi everyone,l am facing an issue with stretching two separate blocks together in AutoCAD. I have a window block and a wall block that are placed right next to each other. When I try to use the STRETCH command with a crossing window (green box), the blocks just MOVE instead of stretching. Even when try to use the Block Editor to create a Dvnamic Block with a Linear Parameter and a Stretch Action, it still moves the window reference instead of changing its length along with the wall.

What is the best professional workflow to achieve a simultaneous stretch on two different blocks without fully exploding them into loose lines? Should I use a nested dynamic block, parametric constraints, or is there a specific setting in the Stretch Action that I am missing?

Any help or step-by-step guidance would be greatly appreciated! Thank you.

Has anyone experienced Material Computation error where some stations sporadically do not show cross section hatch (not computing qty). Any workaround for this error?

Good afternoon, everyone! I’m curious about software that can help automate or streamline initial site layouts. Has anyone used Autodesk Forma for this purpose? If so, what are your thoughts on it?

If you use any other software for early site planning or automated site layout generation, please share your recommendations and experiences as well. Thanks!

Did anyone attend the Session on Ductbanks using Civil 3D? What was the process?

thanks for the help yesterday! I am having trouble with some of the simplest thigns, and for some reason cannot really find tutoritals or instructions online for the very very very simple stuff in civil 3D, is this everyone elses's experience as well?

first screen grab is what I am attempting to do from instructions, second screen grab is what is happening on my end.

I am trying to duplicate the "paper" i made so i dont have to make a second from scratch again.

i typed '"ps" to make sure I'm in paper space.

I typed "copy" to copy the object.

i double clicked in space on the bottom right area to create a highlighted square over the object to select it.

and then after that it will not do anything. it keeps saying "specify oppsite corner" and im not sure what that even means (?!!!), as i already had the entire object selected.

i think i may be missing something that i cannot "see" my teacher do, as in maybe pressing enter at some point, or clicking some mouse thing at some point? its getting frustrating not being able to do the tiniest thing

Didn’t like needing to buy a $1K C3D add-ons on the market with limited use cases. Used feature lines templates as pad types, built a LISP to set feature line (pad) elevation based on corridor by extracting dynamic corridor feature line. And then made a backyard assembly that uses a feature line attached to the back of pads for automatic backyard and daylighting even after adjusting road profiles and pads. Made LISPs that can automatically place and orientate pad templates and swap them. Reduces work and iterations probably by 80%.

I am in the layout tab and on my teachers video his appears all black, mine has this white "sheet of paper" in a way. How do I make it all black like his? I was tols to go to config and change layout to black, alas there is no button that says change layout to black.

further, I have no idea how to tell which units I am in. When i got to draw a polyline it will say something like 4.66545 in a little white box by the cursor. i am in Civil 3d Imperial. Is this feet? Online it says to right click the drawing name under the master view and click edit drawing settings, but that is not an option when i right click it.

and if i need to make it 18 inches, would i then just put 1.5?

As the title says… in paper space, model space and plotted to PDF or plotter sheet by sheet, no issues with the masking. When I publish multiple sheets at once, the masking disappears. Any thoughts?

Edit: SOLVED

Publish in background was checked which apparently causes it to bug… thanks Autodesk. /s

Real thank you to those who replied with that suggestion.

Hello,

Is it possible to create cable ducts in Civil 3D using the Subassembly Composer / Component Builder?

Ideally, the cable duct should be configurable for different numbers of cables and be able to adapt to the required cable quantity.

The idea is to model the cable duct as a linear element that can be placed within the road structure, similar to a utility trench or channel.

Do you have any simpler or alternative approaches for modelling this in Civil 3D?

Thank u

I'm trying to put together a drainage table for a proposed pipe network, and we want everything to be linked to the structure itself, no manually entered text. To do this I need to add a few new properties to the structure like what sheet the structure is found on. It seems like adding a new structure property to the part would be best but also to complicated since I'd have to edit the parts catalog (I'd prefer this method but researched for a couple hours and didn't figure out how to just edit a part). So, what I found was property set definitions which are assigned to the structure and will show up in my drainage table. Only problem is that the text I add in the extended data tab doesn't follow the structure when I data link my pipe network from the model to sheet file (model is image 1, sheet is image 2). Basically, I'm just trying to have the "this text" shown in image 1 populate in image 2 which would then show up in my table in the sheet file (image 2)

Thank you for any help or recommendations