Trimble Business Center

The purple/green areas have a MSI applied. The black area does not. The site design region boundaries are highlighted.

After applying the MSI's and building the surfaces, the program does not appear to be creating the subgrade correctly in some areas. It appears the program is transitioning the subgrade from the last line included in the surface to the FG of the adjacent area, intermittently, as shown below. 

Surface slices through first example above.

Good area:

Incorrect area:

Please advise as soon as possible as this issue has us pretty much dead in the water on creating sub-grades/takeoffs.

Thanks

Project files: Transfer - Dropbox 

Just came across another related issue on a different project. It appears TBC is leaving out an area that is bounded by linestrings that are part of the surface but aren't marked as boundaries. (blue is the surface color so there is no MSI applied in that area for some reason) It appears the subgrade is being created correctly but I am unsure of the engineered materials reports at this point. 

Region Boundaries Highlighted

Project files:Transfer - Dropbox 

Hi Richard,

You wrote: "It appears TBC is leaving out an area that is bounded by linestrings that are part of the surface but aren't marked as boundaries."

Perhaps TBC is treating those linestrings as drapelines. Try to open them (un-tick Auto-Close), maybe that will help?

drapeline
A closed polyline on a surface that is used to separate different materials that have been applied to different parts of the surface.

Hello Marian,

Thanks for the suggestion.

The linestrings I was referring to are not closed. They are just breaklines used to control the surface. So, while they may have something to do with the issue, unless I am misunderstanding your suggestion, I don't think Closed/Unclosed is part of it.  

Turns out the DES-Breaklines linestrings in question were marked as "Sharp and Texture Boundaries". When I changed them to "Soft" and rebuilt the surfaces, this issue resolved itself. However, the first issue remains.

I just looked at your first project. Why not use your Des-Concrete as a break line with and elevation of 1721 to define the surface? Just curious as to why having 2 lines .01 off from each other trying to define the surface?

Also,

Are you adding your FG surface as a surface member to the Finish Design surface rather then let TBC build it? 

Edit- I just noticed you're using vertical design instructions. I'm assuming that's why you're adding your FG Surface?

Erik Petersen wrote:

 

 

Also,

Are you adding your FG surface as a surface member to the Finish Design surface rather then let TBC build it? 

 

Edit- I just noticed you're using vertical design instructions. I'm assuming that's why you're adding your FG Surface?

Yes. Added FG to Finish Design as a member. Seems to simplify some things.

Erik Petersen wrote:

 

I just looked at your first project. Why not use your Des-Concrete as a break line with and elevation of 1721 to define the surface? Just curious as to why having 2 lines .01 off from each other trying to define the surface?

 

 

Probably experimenting and didn't change back. Thanks for the heads up. BTW, Your screen cap looks like your not reproducing the issue. Which version are you using? I'm on 5.20.2

Correct. Its not recreating the issue. I fixed it by adding a break line at that elevation in that area. It has something to do with where your breaklines for your vertical design are and the boundary you're using for your sub grade adjustments.That .01 is messing with it.

I basically did the same thing. Removed the DES-Breakline (red line) and added the DES-Concrete line back into the surface. So there is one line there now that is both controlling the surface and also categorized as a design boundary.

After rebuilding the surface the issue remains. Did you add your line directly to the Finished Grade surface or the FG surface?

Alright so I just opened a fresh TBC file of this project. 

1. Removed the FG surface from the Finish Design as as surface member
2. Add Des-Breaklines to the category Design tab.
3. Deleted your Des-Concrete boundary in that area
4. Change the line Des-breaklines to Des-Concrete in that area.
5. Changed FD with subgrades adjusted surface to auto rebuild.
6. Rebuilt.

It however looks like you'll have to do adjust the boundary at one of the entrances as its trying to catch something a 0 elevation

I don't know if it's a coincidence or what. I did not change my surface member configuration or design boundaries. What I did do though was to manually rebuild both the "Finished design" and "FD with subgrades adjusted" surfaces by right clicking on them individually in the Project Explorer and BAM! the subgrade surface rebuilt itself (mostly) correctly. (I was using the "BuildTakeoffSurfaces" ribbon button in the Takeoff group prior)  I have a few more MSI to add so we'll see how it plays out.

What I am seeing though is that a couple minuscule issues persist, that I'll probably ignore, but are not correct none the less.

Thanks for your participation with this @Erik Petersen

I deleted the FG Surface from it and added the break lines to the Design category. I have this attached. I'll dig into this a little bit more this morning. 

Heres what I've done

TBC VLC

OK this one is a done deal. Not sure what I did but, coincidence or anecdotal, seems that when I rebuild the surfaces manually, the calculations come out as expected. Either way I'm taking it. 

Thanks for your help.

No Problem.

I tried to just rebuild the original TBC file and it didn't fix it. So something along the line changed on your end. At least it's working now!