I have a problem with Ramp

[Mohamed-Nassar]

Hello

i was modeled a Ramp for structure Basement. but i face a problem for the first time can any one explain the reason and solution i have try a lot before post it here,

[L.Maas]

Can you better describe what your problem is and what the end result should look like?

Also consider to upload (relevant part of) your Revit project (version?) so we can see what you have now.

The screenshot does not tell that much

[martijn_pater]

Not entirely clear what you're after, but perhaps check out several screencasts by @RDAOU on curved ramps:
LINK 1  LINK 2  LINK 3  LINK 4  LINK 5