AutoCAD Civil 3D :: Use Conditional Subassembly For Grading?

Jan 8, 2013

I have an alignment running counter clockwise at the perimeter of a septic bed.  I’m trying to use a conditional subassembly for the grading.From 0’ to 5’ of fill, grade to existing @ 3:1.Greater than 5” of fill, add a wall (no more than 4’ high) and grade to existing @ 3:1.

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AutoCAD Civil 3D :: Corridor With Conditional Subassembly?

Apr 2, 2012

I am working on implementing Chad Studer's techniques from his presentation at Autodesk University for corridors with conditional subassemblies at the driveways.  Basically I created a corridor with two driveways for a test run.  When I select the corridor and look at the object viewer, there are several lines going to who knows where at both driveways.  But a look at the properties of the finished grade surface generated doesn't show anything out of the ordinary.  I had the conditional subassembly look for a polyline on layer "driveway."  It appears that there may be a gap in the corridor at each end of the pollyline.  I've attached the drawing file. 

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AutoCAD Civil 3D :: Cut File Conditional Subassembly

Nov 9, 2012

how can one create the cut file conditional subassembly or the horizontal conditional subassembly using subassembly composer?

Civil 3D 2013
HP Pavilion dv6 cor i7
16GB RAM
windows 8

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AutoCAD Civil 3D :: Conditional Cut / Fill Subassembly - Setting Priorities

Aug 19, 2009

C3D 2009 - We are grading on a hillside, and need to prioritize our conditional fill situations. First fill at 2:1, if not then build wall and daylight @ 2:1, if not then build full height wall. However the sections are showing all three options where they are applicable. I want it to only show the "best" or "first" solution.

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AutoCAD Civil 3D :: Conditional Point / Link Code In Subassembly Composer

Jan 10, 2013

it is possible to define point/link codes using some conditional expressions. When I try to write in an expression under "Link Codes" I get an error. Is there a way to create conditional codes without the use of "decisions"?

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AutoCAD Civil 3D :: Creating Conditional Subassembly - Proposed Cross Section

Oct 1, 2013

I am at a crossroads with this corridor that I have to create in Civil 3D 2011, with a sub assembly that logically seems very simple...the conditions for daylight can be found in "Proposed Cross Section".  In short I have 4 fill conditions and 2 cut conditions, based on height above original ground...(there are additional requirements for guardrails and retaining walls but at this point i will settle for my slope reaching original ground)

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AutoCAD Civil 3D :: Infill Grading VS Feature Line Grading

Dec 24, 2013

"An infill grading has no criteria applied to it. Any area bounded by feature lines or lot lines that is not already a grading can be converted to an infill grading."

So given an area enclosed by a feature line, an infill grading can be created. Using the same features line, an feature line grading can also be created. what is the difference between these two surfaces? They both have no criteria applied to them.

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AutoCAD Civil 3D :: Import Subassembly API For Custom Subassembly - Error?

Nov 12, 2013

When I use ImportSubassembly API to import my subassembly created by Autodesk Subassembly Composer  into my civil project, it reports error-"eFilerError".

the code like this:

atcFile = @"D:9f92eaa4ef514ac982518852e1169932.atc";
itemId = "ab660722-c69d-4ade-b373-0e9f99c94e55";
SubassemblyCollection subassemblyCollection = cDoc.SubassemblyCollection;
ObjectId subassemblyId = subassemblyCollection.ImportSubassembly("TestSubassembly", atcFile, itemId, this.doc.Editor.GetPoint("Select import subAssembly location").Value);

However, it is OK if to import subassembly provided by Cilvil 3D.

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AutoCAD Civil 3D :: Use Conditional Horizontal Target

May 24, 2013

What i want to do is ; i have a corridor with both right/left sides ending with linktosurface with fixed slope.In some sections my existing surface is not wide enough to get intersection with link to surface with fixed slope. So i want to use this "conditional horizontal target " if my surface is not enough wide for intersection then just intersect or go to the edge of my existing surface. But i learned that  surfaces cannot be used as an offset target with that subassembly.

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AutoCAD Civil 3D :: Conditional Horizontal Target - Odd Results?

Dec 10, 2012

In particular, I am attempting the infamous task of creating driveway openings using a horizontal target with my sub-assemblies.  I referred to the AU 2010 video tutorial that gets passed around here on the boards, and for the most part, it works with ONE tiny exception.

Like in the AU video, I set my conditional target to look for a particular layer, and I first attempted the exercise by placing ONE polyline (i.e. driveway opening) on the layer, and set set conditional "found" and "not found" targets to find this pline.  The target found the pline on the layer on the right side of the road where I drew it, and created the opening as hoped, but it created an opening on the LEFT side of the road as well!

What do I have to do to prevent the conditional horizontal targets from ignoring the exact opposite side of the road?  In my assembly, the left conditions are set to LEFT, and the right conditions are set to RIGHT, but when the corridor gets modeled, BOTH sides of the road will show an opening even if there is only one pline drawn.

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AutoCAD Civil 3D :: Comparison Point On Conditional Subassemblies

Jul 9, 2013

I need to create a corridor that has this section. So I'm using this assembly:  

on which I put 3 conditional fill subassemblies on point A, one for fill conditions of more than 2 m that would daylight at 2:1 until it reaches 2 m down and then daylights at 1:3 until it reaches the EG. Then I have another for fill conditions of less than 2 m that only daylights at 2:1 to the EG, and the last one is for all cut conditions.

As expected I have the following problem in some stations that have fill conditions on A of less than 2 m but more than 2 m on B:

Is there any way I can make B the comparison point without having the following problem on cut conditions?

Or that I could create an assembly with the condition that when I have a fill of more than 2 m on point B it daylights, from point B, at 1:3; but when B would be on cut conditions it daylights from A?

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AutoCAD Civil 3D :: Build Corridor Using Conditional Slope Assembly?

Mar 3, 2012

I am trying to build a corridor using a conditional slope assembly that considers the roadway and links into the lots.

The corridor is divided into 3 regions. All targeting has been assigned.

The first region appears fine. The second and third show no links beyond the roadway.

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AutoCAD Civil 3D :: How To Raise Grading

May 9, 2012

Is there an easy way to raise an entire site by 1.0 foot and have the grading hit the previous targeted surface?  The only way I have found is to grab all the feature lines and raise them up by the required amount, but by doing that, the grading bogs down my system and it crashes, plus, I have grading attached to 3dpoly's and not necessarily all feature lines.

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AutoCAD Civil 3D :: Grading Toe Disappearing?

Apr 25, 2013

I am drawing a pond levy.  I draw the outline of the top of the fill, set that at the elevation I want, then grade it down to the existing surface on a 6:1.  The grading works perfectly.  The outline of the fill's footprint shows up just fine around the back of the fill, but the toe line doesn't show up all along the front side of the fill, but I still get the slope lines projecting down in the front. 

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AutoCAD Civil 3D :: Use Grading For Channel?

Mar 6, 2012

I want to cut a channel through a existing surface; bottom width: 5 feet; at elevation 1950 and side slope 1:1 (45deg) up to existing ground.

What I am doing right now is create a feature lines 5 feet wide, at el 1950 and use grading tool to project it to existing ground with side slope at 1:1. What i am doing is correct?

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AutoCAD Civil 3D :: Grading Subdivisions

Oct 16, 2013

I am working with Civil 3D 2014, I played with 2009 back in 2008 and before that it was Land desktop.  I don't know if I am not following a standard workflow.

Build the EG from contours.Layout the CL for the ROW and convert to a horizontal alignments.Create the profiles.Design the vertical alignment in the profile.Create the assemblies for the different types of road sections.Full profile, pavement width assembly, the curb return assembly, the daylight left / right, 1/2 side left / right, and pavement width left / right.Build the corridor, set the target surface as EG or FG, depending on where the section of the corridor is located. (At the edge of the property to EG, then after the first building pad to FG)This is where I have a thought something is wrong. If I am grading the entire site, why would I have the ROW grade to the EG, when I will need the surface to grade from the ROW to the closest building pads?Create the intersections, using the different types of assemblies, per the ROW sections.Create feature lines and use elevation editor to set all the elevations around the pad.Using the Grading creation tool, grade to surface, using a 2:1 side slope. Then adding an infill to the pad.

 I keep having the file crash after grading about 10 lots. I recover and it works find, but then the file runs very slow, and will crash. I haven't taken any classes in Civil 3d, and am looking for one in my area.

I am use to creating the vertical surface then creating points along the CL, TBC, FL, BOW then creating break lines along the points. Then create a break line for the pads, and build the FG contours from these break lines.

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AutoCAD Civil 3D :: Grading From The Side

Aug 8, 2012

Say I have a grading that runs north south and goes down 2%, up 2% and so on waffling along. Is it a poor practice to trace the side edge of the grading (in the same site) to add another grading to pitch east west?

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AutoCAD Civil 3D :: Grading Transition

Mar 4, 2013

I have a building pad where I created a grading of 5:1 to existing grade.  I want to change one side to 20:1.  How do I go about transitioning the 5:1 to the 20:1.  I create the 20:1 and the contours just dead end into the 5:1 grading area

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AutoCAD Civil 3D :: Grading With Different Slopes

Dec 31, 2013

I tried to work with grading but it didn't work,

1 - The square helicopter pad is flat and grading with 2:1 fill, 1:1 cut.
2-  The second FL is 2% slope down and grading with 2:1 fill, 1:1 cut.
3-  The third FL is slope down to meet the existing road, both sides will same cut and fill.

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AutoCAD Civil 3D :: Helicopter Pad Grading

Dec 30, 2013

I am creating a helicopter pad, with cut slope 1:1 and fill 2:1. But when i created a transition between the pad and existing road, i don't know how to. I have added a feature lines and make a separate grading but somehow it didn't work.

I have attached here the dwg file (C3D 2014) .

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AutoCAD Inventor :: How To Copy Subassembly To Create Similar But Different Subassembly

Sep 27, 2013

(in Inventor Pro 2014,64 bit):

I've made an stairs assembly that contains adaptive parts that are all controlled by the assembly parameters.

Here is my assembly and the controlling parameters. The stringers on the side are made with the frame generator and use the "extend" feature to get the appropriate length, as driven by the parameters. The reason I used frame generator is so that I can easily change sizes of the stringers down the road, if needed.  I chose to make the parts associative so I could control all of the parameters from within the assembly instead of opening each part separately.

My goal now is to be able to use this assembly (or something similar) as a template to create new sets of stairs, all to be placed in the same main assembly.

I attempted to duplicate all of the parts (append a "2" at the end of each file name and replace components in the new set of stairs with the 2nd version) but ran into problems with the two stringers. I can't figure out what to do to get the Frame00001 and Skeleton00001 to reassociate to Frame00002 and Skeleton00002. So any time I change my slope, the original stairs will end up trying to copy the new stringers instead of keeping the old ones.

how can I make this assembly reference a new frame, and secondly?

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AutoCAD Civil 3D :: Residential Grading Display

Mar 19, 2013

What does "Residential grading display" mean?

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AutoCAD Civil 3D :: Grading Against A Retaining Wall

Sep 8, 2012

I have a platform at level 13.275m and nearby there is a retaining wall at aprox. level 4.0m. 

For the wall i've made a surface using feature lines from EG till level 15.0m and then pasted into the EG surface to create the 'barrier' for the slope. But when i do the grading with the fill slope projection to surface, when it reaches the retaining wall section, the contour lines go crazy and if i do a quick profile, the fill slope line (obvious) is iregular, rather than a straight down line (2:1)  going from level 13.275m till it hits the EG.

I've attached a picture to show the problem better.

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AutoCAD Civil 3D :: Complex Object Grading

May 21, 2012

I am tring to grade a complex object. Please see the attached document. The two grading objects are not interfacing correctly when graded although i can get the surface almost correct i beleive. Is there a way to remove this issue or the grading will not create a lot of difference when computing the volume clacs ( we are talking volum computation roughly about a million cubic metres cutting).

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AutoCAD Civil 3D :: Inaccurate Grading Volumes

Aug 29, 2012

I have noticed that the value I get when I use the surface volume comparison tool or look at a graded item in the grading group properties box is different than if I calculate it by hand and the discrepancy isn't even consistant.  After spotting this problem in a job I am working on graded two simple ponds to check this.  The first one is 100' x 100' and 5' deep w/ 2:1 side slopes.  Calculating the volume by hand I get 1500 cu. yds but the grading group properties come up to 1506.17 cu. yds.  The accuracy is off by less than 0.5%  The second pond is 100' x 100' and 2' deep with 3:1 side slopes.  The hand calc gets me 654.52 cu. yds. and the grading group properties reads 655 cu. yds.  This discrepancy is closer to 7%. I really need to know if I can trust the volume tools in the program. 

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AutoCAD Civil 3D :: Joining Three Grading Objects

Apr 24, 2013

I have a compost pad and retention pond to design, I set my back Pad line to surface and then graded to elevation so the slope to the pond will have no cuts

I created a pond and left out the grading to surface on the up hill side towards the pad which will be paved one day. I now created two side feature lines to enclose the whole pad and graded by distance and slope.

My problem now is the two side and back seem to blend together as I attached the feature lines together but I can not figure out how to blend into the pond create as it has side slopes to EG and the front which must join to the side slope crest to enclose the pad to drain into the pond.

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AutoCAD Civil 3D :: Grading Between Two Features Lines

Jun 10, 2011

can i make grading between two features lines.

i want to make a slope from FEATURE LINE 1(FL1)   TO FEATURE LINE 2 (FL2)

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AutoCAD Civil 3D :: Surface From Grading Objects

Jun 20, 2013

It has been too long since I created Grading Objects and Proposed Surfaces. I am working in a file with my existing surface DATA Linked. I am creating a grading plan. I have created three separate grading objects in the Site named Proposed. One in the building, One is a new ditch, one is a graded existing ditch. I need to make these three with the unaffected areas of the existing surface into a new surface. How do I accomplish that . All my grading objects appear to be individually accurate and are created with a Feature Line and Grade to Surface Styles.

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AutoCAD Civil 3D :: Grading Filling In Embankment

Dec 20, 2012

1 Do I create feature lines at toe , then vertical between the toe and the cliff , then use the grading & elev.editor
2 Once I obtain the infill surface l, how rotate or orient the model w/ rocks so this photo 3 is draped over it.?

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AutoCAD Civil 3D :: Volumes / Grading And Surfaces

May 30, 2012

I have an existing topo surface created as well as grading for a proposed elevated pad of earth done in civil 3d 2013. I simply want to calculate the cut and fill quantities. I created the grading with automatic surface creation checked on. When I use volume tools to see what the quantities are, it says 0.0 for both cut and fill.

I created another surface (TIN) and pasted the existing topo surface and the proposed grading surface into it and I couldn't get any quantities.

I created another surface (TIN volume) and set the base surface as the existing surface and the comparison surface as the surface created from the grading but again could get no quantities.

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AutoCAD Civil 3D :: Grading Object Projection

Jun 18, 2012

I am having difficulty projecting an existing feature line at a specified tie-in slope.  I have a steep (3:1) feature line that I need to project at a specific slope (2.5:1)to intersect a surface model.  When I create the grading object the generated grading object is not 3:1 along the feature line and 2.5:1 perpendicular to the feature line.  Instead I am left with a new slope that is 1.9:1 between the generated contours.  I have attempted slope to surface as well as slope for a distance.My design criteria is to not exceed a 2.5:1 tie-in slope.

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