Carlson Software Forum

What's the best way to have Survcadd grade a street and it's cul-de-sac? Do
you handle them separately and merge grids or what?

Jason

"Jason Bly" <jbly@marshandlegge.com> wrote in message
news:bge7ql$m15$1@update.carlsonsw.com...

What's the best way to have Survcadd grade a street and it's cul-de-sac?
Do
you handle them separately and merge grids or what?

Jason

I use a combination of points and profile routines.

Standard engineering practice is to provide a culdesac roll out profile.
What you do is to jump to the right at the first culdesac pc and then set up
vertical curves. You have to tie back to the grade you started out at with
the pc. By using the 3d prof command you can transfer your profile grades to
the linework representing the culdesac.i generally like to use the Rmarc
command prior to the profile to 3dpoly command. For the main centerline, I
break the centerline polyline at the pc of the culdesac. Then I use prof to
3dpoly to make the centerline a breakline. Using offset3d, I create break
lines for the gutter pan, top of curb or edge of pavement. Once I have all
my break lines I use the triangulate and contour command from surface
entities. I usually have pretty good results with this method and I don't
need to generate a bunch of grid files. Survcadd really handles 3dpoly's
well. I use a similar approach for setting up toe and top of slopes.
Another approach is to set points (spot shots) at or near the linework of
the edge of pvmt. Use the profile from centerline points option, set an
appropriate tolerance and then sample the linework. stationing isn't that
important because in the next step you use the profile to 3dpoly comand to
change the 2d polyline into a 3d one. Once again you now have breaklines and
you can generate contours.



I can send you more iinformation, email me at albud1962@aol.com or
al@fayetteengineering.com