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deltacoolguy
Posts: 230
Registered: ‎12-28-2009
Message 1 of 7 (322 Views)

Corridors & small complex areas...

322 Views, 6 Replies
01-15-2013 07:22 PM

I've read that it is possible to "hand draft" small complex areas that a corridor cannot handle easily.

 

I have an intersection in an old neighborhood that is constrained by retaining walls, buildings, and so on.  In this I have to fit in current ADA ramps.  Due to constrained space I will have to get creative in my elevations and layouts.

 

What would be a good workflow for a special situation like this?  Ideally, I'd like to somehow integrate it with the corridor.

 

Thanks.

Windows 7-64
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AutoCAD Civil 3D 2013
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sboon
Posts: 2,067
Registered: ‎11-08-2005
Message 2 of 7 (316 Views)

Re: Corridors & small complex areas...

01-15-2013 08:40 PM in reply to: deltacoolguy

In a similar situation I used a corridor to build the paved surface, and then extracted the edge of pavement featurelines.  From there I used the stepped offset, and other featureline editing tools to build the curbs, sidewalks, etc. 

 

The Elevation by Reference tools on the Modify panel of the Ribbon are particularly useful for this type of work.

 

Mentor
deltacoolguy
Posts: 230
Registered: ‎12-28-2009
Message 3 of 7 (280 Views)

Re: Corridors & small complex areas...

01-19-2013 10:22 AM in reply to: sboon

sboon wrote:

In a similar situation I used a corridor to build the paved surface, and then extracted the edge of pavement featurelines.  From there I used the stepped offset, and other featureline editing tools to build the curbs, sidewalks, etc. 

 

The Elevation by Reference tools on the Modify panel of the Ribbon are particularly useful for this type of work.

 


Considering that ADA ramps are on curn returns, does this work within intersections as well?  I am presuming so.

 

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8GB RAM
AutoCAD Civil 3D 2013
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sboon
Posts: 2,067
Registered: ‎11-08-2005
Message 4 of 7 (264 Views)

Re: Corridors & small complex areas...

01-19-2013 04:55 PM in reply to: deltacoolguy

I've attached a drawing with a couple of examples.  The method that worked best for me:

  • Offset the curb return alignment to create 2d polylines representing the gutterline, curb and sidewalk. 
  • Edit the polylines to create the ramp, and any other 2d geometry that you want to include. 
  • I had problems with editing the featurelines if they cross without a proper PI, so make sure to add vertices to all of the polylines, at every intersection.
  • Convert the polylines to featurelines, then use the elevation editing tools to finish.

Clipboard01.png

 

Valued Mentor
fcernst
Posts: 1,086
Registered: ‎01-07-2011
Message 5 of 7 (249 Views)

Re: Corridors & small complex areas...

01-20-2013 08:36 AM in reply to: deltacoolguy

"Ideally, I'd like to somehow integrate it with the corridor."

 

Split and Add a Region to the Curb Return baseline of your Corridor that spans the ADA Ramp stationing and use an Assembly for that Region that will target the ADA Ramp plan geometry.

 

This will be 100% dynamic for you.

Fred Ernst, PE
C3D 2015
Ernst Engineering
www.ernstengineering.com
Mentor
deltacoolguy
Posts: 230
Registered: ‎12-28-2009
Message 6 of 7 (221 Views)

Re: Corridors & small complex areas...

01-21-2013 05:28 AM in reply to: fcernst

Excellent suggestions.  Thanks.

 

One additional question:  Will this work if the ADA ramp is not radial or perpendicular to the curb?  On odd angle, in other words.

 

(I ended up getting involved in other aspects of the project over the weekend, and have only had a chance to lightly touch on this so far.)

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AutoCAD Civil 3D 2013
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sboon
Posts: 2,067
Registered: ‎11-08-2005
Message 7 of 7 (201 Views)

Re: Corridors & small complex areas...

01-21-2013 08:43 AM in reply to: deltacoolguy

Yep.

 

Clipboard01.png

 

 

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