Sloping garage ramp

[rob.127056]

I am trying to create a continuous sloping ramp that follows a "square donut" shape in plan (see attached).
If I use a floor and edit sub elements I get lines running across the floor and the ramp is very "geometric" and not smooth and blended like it would actually be.

I did try a ramp and it looks better but when I try to create the whole ramp I get an error saying: "Revit has experienced an unexpected error. The operation has been cancelled to protect your project from corruption." I don't want to create a bunch of small ramps together to get what I an trying to create. Any sugggestions?
Thanks.

[mthurnauer]

I think part of your problem actually stems from trying to work out how the ramp surface would actually slope and I doubt that the ramp 'corners' would slope. I think you would have four ramps on the four sides of your square donut with four flat landings at the four corners of the donut.

[irneb]

Yep, usually it's very difficult to slope around a corner - especially such a sharp corner. Even in real life. You tend to have an extreme slope close to the inside of the corner or the road needs to have an excessive, non-uniform reverse camber. Generally when doing these types of ramps you'd go with a circular ramp instead. It's also a better option for the motorist as turning circles are not so much of an issue as trying to go around a 90deg angle without hitting oncoming traffic.

Edit: Of course if you simply want to BS the drawing, you could always "hide" those lines by using the LineWork tool and changing them into <Invisible lines>.

[cliff collins]

I believe you can turn off the triangulated lines in VG>Model Categories>Floors>Interior Edges and /or Hidden Lines?

[Alfredo Medina]

I am trying to create a continuous sloping ramp that follows a "square donut" shape in plan ... Any suggestions?

Start with a circular ramp, then modify the boundary lines.

[rob.127056]

Thanks for all the responses!
Alfredo you nailed it! That is exactly the answer I needed. Thanks!