Trimble Business Center

BASIC ROAD WITH 8" VERTICAL CURB USING THE VERTICAL DESIGN TOOLSET.  WHEN APPLYING A "SURFACE TIE" IT TIED TO THE EXISTING GRADE IN A WAY THAT WAS SIMILAR TO THE SHAPE OF MY VERTICAL DESIGN.  ANYONE ELSE SEEN THIS HAPPEN? DOESN'T SEEM TO MATTER IF I CHOOSE SHARP OR SMOOTH FOR MY SURFACE TIE TOOL TYPE EITHER.  

You will have to manually add breaklines to smooth the transition between the paving and the curb. Any abrupt elevation changes will cause issues like this.  

That’s what I ended up doing, just wondering if anyone found a setting or a step in the workflow to prevent this.  Thank you!

Sent from my iPhone

Integrity

Commitment

Excellence

John

West

GPS Specialist

m: (717) 659-2431

f: (717) 938-4083

w: lewinc.com

I am looking at this one and I am not seeing what you think is incorrect here. If I use an interval of 2' and tie at 3:1 from a line that follows the 3D Shape of the end of a road, there will be steps in the sideslope because there are steps in the source line - because over a distance of say 0.01' you have a step of 0.666' (8') and that makes the top of the curb closer to the OG (in a Cut) than the flow line - so you will get a step in the tie slope as a result

What are you thinking is wrong here with the calculations and what do you want it to do instead?

The calculations aren't wrong, it just needs some manual breaklines added to smooth out the surface before I would try to use it in a machine. 

The surface Sharpness of the breaklines is purely going to affect a) the shadows of a surface and also the shape f the contours as they cross the breakline (Sharp basically gives a sharp break in the contour at the breakline and the Soft will give a rounding of the contours - these do not change the way the surface is formed, purely the way that it is displayed graphically. The Sharp and Texture boundary is going to constrain site improvements or textures in Takeoff.

Alan

I dont see how you can automate this because the start point will vary greatly - you will basically smooth this out as you say by removing the steps and adjusting the shape - but that line likely will not tie to the surface unless you drape it on the existing model and then the slope would not be a constant either - all ok from a dirt smooth out perspective so you are really just using TBC to give you a guide as to where the tie line would be

Alan