Playing with the Raise-Lower surface editor and noted it doesnt redraw the contour tie ins I made to existing grade. Have I done something incorrect in creating my surface as it relates to tie ins?
chaz_
Solved! Go to Solution.
Solved by ccoles. Go to Solution.
What's a "contour tie-in"? More details and maybe an image would help.
Chaz, what Matt might have been asking is for more details regarding what you're doing and specifically how you're doing it. It is difficult to troubleshoot your problem if your posting is so vague that we have to guess at what you're asking.
Are you using Grading in Civil 3D? Do you have grading objects that target a specific surface for daylighting? You have raised/lowered that target surface and your grading objects did not update? Is that what you're asking?
OR
You have an og surface and an fg surface. You have drawn where they intersect at 0 design elevation difference. One of the surfaces was raised/lowered and your linework at 0 design elevation is no longer accurate? What command did you use to create those lines? Do you know about TIN Volume Surface, which allows you to display a 0 contour (tie-in line) and will update any time either OG or FG is modified?
Best regards,
Tim
My apologies for the vague follow up.....I was mobile.
I have used C3D to create feature lines, and used the CREATE GRADING to daylight my perimeter back to the existing (Target) surface. I went to raise the site 5 feet (just fooling around) but the daylight tie-ins dont update.
Attached is an image of my little plan.......
chaz_
Looking at that image, it looks fine to me. Tell us what's wrong with it. I tried making a grading and lowering the daylight surface and everything updated nicely. Is this what you mean?
It would probably be a little less confusing for all if you used the standard terminology. We're assuming "tie-ins" means your daylight line? And when you say "raise the site elevations", you mean raise your surface? If your daylight is not adjusting itself when you raise the surface, I would suspect that possibly you're not raising the surface to which the daylight is associated. Meaning, the grading object is daylighting to a surface different than the one you raised.
I can't imagine, if that's not the case, why the grading is not updating with a change to the daylight surface.
Can you confirm that your grading object (the one that is not updating) is indeed a "grade to surface" type?
After that, you'll need to attach the file here and make sure you give us plenty of details about which grading object is not doing what when you raise which surface.
I hate to beat a dead horse, but when you raise/lower "the surface" you mean the OG surface? Daylight should update correclty unless your grading has been exploded.
If you're raising/lowering the FG surface that was derived from the grading, that's not how you do it. You need to raise or lower the feature lines using the elevation editor. The daylighting will update correclty as will the FG surface if you have checked Automatic Surface Creation in the Grading Group properties.
Tim,
Im not I would ever want to lower an existing grade, but for fun I tried it and my grade daylighting doesnt budge.
Not following this thread too well, but if you want to play with fg/eg balance cut and fill and have your tie-in/ daylight update, you have to raise the grading not the surface.
Let me explain. The daylight lines are using the FEATURE LINE elevations to determine the daylight extents. From the FEATURE LINE to the target surface, it is doing exactly it's job.
HOWEVER, you're going into the SURFACE DEFINITIONS and asking Civil 3D to lower the SURFACE by X feet. It will take all the elevations used to generate the surface and subtract X feet from them to adjust the surface. This means the surface along the daylight line is now X FEET below the target surface. The SURFACE RAISE/LOWER TOOL does not adjust the elevations of the feature lines, daylight lines, or other objects used to build the surface. Therefor, it will not cause the daylight line to adjust to the desired elevation.
To get the daylight lines to adjust, the elevations of the feature line itself must be adjusted.