topic Re: Civil 3D Creating elevation points on an existing 2D files in Civil 3D Forum

Civil 3D Creating elevation points on an existing 2D files

Anonymous — Thu, 06 Jul 2017 16:30:48 GMT

Hi,

I am very new to civil cad 3d and I have an autocad 2D file floor plan that I am working on.

I need to assign elevation/grade on the existing plan to find elevation points not given on the drawing.

I have been playing around with points etc and nothing is working.

Please help!

Re: Civil 3D Creating elevation points on an existing 2D files

Joe-Bouza — Thu, 06 Jul 2017 16:37:53 GMT

...2d file floor plan.

Civil3d is a civil site infrastructure application. When you say floor plan it brings to mind architects and drawing units in inches.

Firs off units have to be dec feet or meters

Now what exactly are you trying to accomplish? Determine an FFE? There are way too many methods to take a stab at

Try to be a little more specific in what you want to do

Re: Civil 3D Creating elevation points on an existing 2D files

Anonymous — Thu, 06 Jul 2017 16:45:51 GMT

Yes I need FFE and the units are in meters.

So what I need are elevations at certain points on a given line. The original drawing is not drawn on a building pad or topographic surface. It is all flat. I want to assign elevations to it.

Hopefully that makes better sense?

Re: Civil 3D Creating elevation points on an existing 2D files

Ranjit_Singh — Thu, 06 Jul 2017 17:00:48 GMT

@Anonymous wrote:

........

Hopefully that makes better sense?

Not yet. It is not clear what you are trying to accomplish. Post the drawing. If possible do a screencast and explain a bit more.

Re: Civil 3D Creating elevation points on an existing 2D files

Anonymous — Thu, 06 Jul 2017 17:16:48 GMT

Re: Civil 3D Creating elevation points on an existing 2D files

Joe-Bouza — Thu, 06 Jul 2017 18:27:49 GMT

you can do this easily with your existing line work and >>>Create Feature line from Object.

start with the boundary of your slab and assign the top of slab elevation

then convert your rays going from the slab to the low points.

what you do not distinguish are the high points... These again and be computed using feature line to the location from the low point and setting the grade.

as you go aroung the floor you may find the need to add more detail.

either way: in the tool space prospector right click the surface collection an create a surface (name it or accept the default "surface1"... FG_Slab seem appropriate to me.

This creates an empty surface if you expand it there are choices of data>>> select all your feature lines>>> right click >>> add to surface as break lines.

Now you can Identify elevations anywhere on the slab.

This is one technique. There are myriad ways to accomplish this. IMHO this method is a good entry level method

Good luck

Re: Civil 3D Creating elevation points on an existing 2D files

Anonymous — Thu, 06 Jul 2017 18:35:53 GMT

I am not clear on the instructions yet.

Would it be possible for you to record yourself doing it if i send you the file? It would help majorly.

Please and thank you!

Re: Civil 3D Creating elevation points on an existing 2D files

Anonymous — Thu, 06 Jul 2017 18:36:51 GMT

The reason im asking to record is so I can use the technique on all floors.

Re: Civil 3D Creating elevation points on an existing 2D files

Joe-Bouza — Thu, 06 Jul 2017 21:02:23 GMT

Sorry I do not have c3d available to me at this time.

Let's discuss the instructions and maybe we can get past your road block

Re: Civil 3D Creating elevation points on an existing 2D files

Anonymous — Thu, 06 Jul 2017 22:43:22 GMT

Alright do I select one line on the boundary or should I make a polyline highlighting the entire boundary (TOS) of the plan?

I assigned the elevation in the dialogue box that pops up by creating a feature line, is that right? How do I create rays?

Re: Civil 3D Creating elevation points on an existing 2D files

Anonymous — Fri, 07 Jul 2017 13:34:28 GMT

Re: Civil 3D Creating elevation points on an existing 2D files

Anonymous — Fri, 07 Jul 2017 18:59:51 GMT

The steps I followed:

1) Select slab boundary lines and create feature lines (typed in 95.9 or 0.0959m as elevation in the dialogue box that pops up).

2) Typed the command "rays" and selected higher points direction towards low

3) Created surface

4) Selected all feature lines and added to surface as break lines

How do I select points to find elevation at a given point? I have not come across any prompted messages asking for my grade.

Thank you.

Re: Civil 3D Creating elevation points on an existing 2D files

user181 — Fri, 07 Jul 2017 20:09:01 GMT

Hi @Anonymous. I created a quick screencast (no sound) showing how to create a surface using just feature lines. At the start I already made the boundary (TOS) breakline. There was already a surface I created so I just deleted the breaklines and added the ones I created. Then I used surface label to show elevations. Hope this helps.

Re: Civil 3D Creating elevation points on an existing 2D files

user181 — Fri, 07 Jul 2017 20:12:15 GMT

I also turned off a few layers in the screencast to make it easier to see.

Re: Civil 3D Creating elevation points on an existing 2D files

Anonymous — Sat, 08 Jul 2017 19:53:33 GMT

THANK YOU THIS HELPED! and to everyone else for answering. Lets hope my boss is impressed ;D I appreciate it.

Re: Civil 3D Creating elevation points on an existing 2D files

user181 — Sat, 08 Jul 2017 20:23:49 GMT

You're welcome. If you have any trouble with it just ask.