Corridor grading - slope to surface

[EdWidy]

On my corridor I am using Link Slope to Surface, using a 3:1 slope. But it is giving me a 3:1 slope radial to the corridor - what I really need is a 3:1 slope between the contours themselves. On the inside of a tight curve, this makes a big difference. See the attached screenshot. Is there a workaround for this?

[fcernst]

No, Corridors layout Links in projections perpendicular to a Baseline.

You'll have to adjust your Daylight grade or your longitudinal Baseline grade... or a combination of both.

[EdWidy]

I was afraid of that. It will be a lot of fussing with assemblies, but it is what it is.

[Joe-Bouza]

extract the edge fl, set a FL at the next contour elevation shaped accordingly, and project from your drawn contour 1:3. add an infill between them to finish it off.

[EdWidy]

So basically... do it manually.

I had extracted a feature line at the edge of the road and tried using a Grading to get my 3:1 slope but had the same problem. I was hoping that Gradings would look at the slope between contours instead of radial to the curve, but no such luck. I'm a little surprised that Autodesk hasn't addressed this issue, as I doubt any of us has ever done a job without curves...

Ed

[Joe-Bouza]

Dont't grade from the extracted line. thats why I said create your first contour in the shape and direction needed and project from that, then infill between the hand drawn contour and the corridor

[doni49]

You could also extract the edge of pavement feature line from the corridor (tell it to maintain the dynamic link) and then create a grading object based on this feature line that slope to the EG surface at 3:1.

[EdWidy]

---

@doni49 wrote:

You could also extract the edge of pavement feature line from the corridor (tell it to maintain the dynamic link) and then create a grading object based on this feature line that slope to the EG surface at 3:1.

---

That's what I tried earlier, but it also grades radially to the feature line, instead of maintaining a 3:1 slope between the contours.

I'll have to do it the way Joe suggested above.

Thanks for all of the input.

Ed

[doni49]

HMMMM.  that won't work as I expected.

[Joe-Bouza]

Thats why I said what I said 🙂