Hi All,
I’m designing a SWA, and I keep running into this issue. Infills created through the grading tools are producing areas where the contour line between an adjacent grading and the infill is looping back on itself instead of following the grading’s feature line. Elevations are the same on both sides of the rogue lines, and all surrounding PI elevations are correct. Any insight would be greatly appreciated.
TIA
Ryan
I think the grading was the issue. I deleted the feature around the outside of the berm and replaced it with multiple shorter segments with transitions in between. No issues since.
Have you added your feature lines as breaklines into your surface? If not, try doing that to see if it fixes your problem.
You can do this by selecting your feature line and on the Ribbon>Feature Line>Add to Surface as Breakline.
Hope this solves your issue!
DP
Thanks of the reply.
Yesterday afternoon I tried adding feature lines at design elevation that essentially boxed out the errant contour lines. This seemed to work well enough to clear them from the fill area, but instead of continuing along the grading they just ended, and when I created a profile view, the area with the new feature line was blank.
This morning I erased those and tried adding the existing feature lines as breaklines, as suggested, but the misplaced contour lines were not effected. Same result after removing those, drawing a polyline around the infill, and adding that as a breakline.
There are two SWAs in this file, and I’ve been getting some other odd behavior. Could it just be a matter of a software limitation?
Thanks for the suggestion.
Yesterday afternoon I tried adding feature lines within the infills, essentially boxing out the errant contour lines. This seemed to work well enough to clear the misplaced lines, but cause them to end abruptly instead of following the grading feature lines, and there was a blank space in that location when I created a profile view.
Today I erased those and tried adding the existing feature lines as breaklines, as recommended, but the problem contour lines were not affected. Same result after removing those and drawing a polyline around the infill and adding it as a breakline.
This file is large, with SWA’s at two sites, and I’ve been getting other odd behavior. My assumption was that Civil 3D was powerful enough to handle a much heavier workload, but I’ve also read while researching these issues that grading tools are fairly unstable. Could this simply be a software limitation?
Update: I encountered the same problem on another project, but creating shorter grading objects did not correct it. After some additional searches in the Autodesk forums, I’ve found that the preferred solution is to raise or lower the feature lines by 0.0001′. While the perfectionist in me is perturbed at the un-rounded elevations, the drawing at least looks correct.
Thanks for the suggestion.
Yesterday afternoon I tried adding feature lines within the infills, essentially boxing out the errant contour lines. This seemed to work well enough to clear the misplaced lines, but cause them to end abruptly instead of following the grading feature lines, and there was a blank space in that location when I created a profile view.
Today I erased those and tried adding the existing feature lines as breaklines, as recommended, but the problem contour lines were not effected. Same result after removing those and drawing a polyline around the infill and adding it as a breakline.
This file is large, with SWA’s at two sites, and I’ve been getting other odd behavior. My assumption was that Civil 3D was powerful enough to handle a much heavier workload, but I’ve also read while researching these issues that grading tools are fairly unstable. Could this simply be a software limitation?