AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

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RCBmstg007
Posts: 53
Registered: ‎09-08-2006
Message 1 of 6 (181 Views)

Civil 3D Grading - Linking Objects

181 Views, 5 Replies
09-04-2013 02:19 PM

Is there away to link a i.e. (a stoop to a finish flood elev)? So that, if I were to raise the finish floor, the stoop would move also. I understand I could possible to a create grading feature line for a stoop, but what happens if the stoop would be irregular shapped and not a rectangle?

 

Thanks for the input!

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Joe-Bouza
Posts: 4,951
Registered: ‎12-15-2008
Message 2 of 6 (177 Views)

Re: Civil 3D Grading - Linking Objects

09-04-2013 02:41 PM in reply to: RCBmstg007

Yes. A grading object would be one way

Thank you

Joseph D. Bouza, P.E. (one of 'THOSE' People) Civil 3D 2012 & 2013
HP Z210 Workstation
Intel Xeon CPU E31240 @ 3.30 Hz
12 GB Ram


Note: Its all Resistentialism, so keep calm and carry on

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Neilw
Posts: 2,261
Registered: ‎09-04-2006
Message 3 of 6 (170 Views)

Re: Civil 3D Grading - Linking Objects

09-04-2013 03:17 PM in reply to: RCBmstg007

The only way to establish dynamic relationships between elements in C3D is with grading objects, corridors, and alignments with a surface profile.

 

Grading objects are not capable of handling non-parallel relationships, so you can rule that option out if the stoop is irregular shaped and/or not parallel to the bldg.

 

Corridors don't handle sharp bends and mitered corners well and are a pain to set up and work with.

 

That leaves you with alignments and profiles, but that technique would get to be too cumbersome to set up and manage if you have more than just a few features involved.

 

I could outline the steps for using alignments if you want to try it, but I don't recommend it.

Neil Wilson (a.k.a. neilw)
Infrastructure Suite/C3D 2013, LDT 2004, Power Civil v8i SS1
WIN 7 64 PRO
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http://www.sec-landmgt.com
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Joe-Bouza
Posts: 4,951
Registered: ‎12-15-2008
Message 4 of 6 (134 Views)

Re: Civil 3D Grading - Linking Objects

09-05-2013 05:13 AM in reply to: Neilw

If you use a relative elevation off FFE to top of stoop for a short segment at either end connect with FL and infill you should be able to drop down the entire flight regardless of shape, no?

 

I am a fan of alignments and surface prof's though. you really think its too much work? I guess it depends on the scope, but several pasted surfs with drops should do it.

Thank you

Joseph D. Bouza, P.E. (one of 'THOSE' People) Civil 3D 2012 & 2013
HP Z210 Workstation
Intel Xeon CPU E31240 @ 3.30 Hz
12 GB Ram


Note: Its all Resistentialism, so keep calm and carry on

64 Bit Win7 OS
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troma
Posts: 2,520
Registered: ‎05-21-2008
Message 5 of 6 (115 Views)

Re: Civil 3D Grading - Linking Objects

09-05-2013 06:56 AM in reply to: RCBmstg007

Here's a possibility:

Use featurelines to build your FFE & stoop.  Use as many as you need for the irregularities.  Put them all on the same layer, with nothing else on that layer.

Now, when you want to raise or drop your FFE, select the featureline.  Do a 'select similar', and you have all the featurelines.  Right-click, and you can Raise/Lower.  This will change them all by the same amount.

The same could be accomplished by having them all in one site, but you may need them in separate sites and/or need other featurelines in the same site as them, so this is an option.

 

Obviously, they are not actually 'linked' to each other.  It's just a convenient way to move them at the same time.


Credit where credit is due! Give kudos or accept as solution whenever you can.

Mentor
john.mckenzie
Posts: 222
Registered: ‎12-19-2006
Message 6 of 6 (107 Views)

Re: Civil 3D Grading - Linking Objects

09-05-2013 08:10 AM in reply to: RCBmstg007

With irregular shapes for the stoops, I would grade a small section down at doorways to the stoop offset required. then when a stoop requires modification, I would modify the feature line for the stoop and then edit the elevation of the feature line to match the elevation that the grading created to show the stoop elevation relative to FFE. this way you get to automatically calculate the stoop elevation when you move FFE, but you manually move the feature line representing the stoops each time. No perfect solution here.

TROMA's approach is out of the box but reasonably elegant.

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