Is there anyway to attach a column base to a toposurface?

[sam_hsu]

Hello! I have a problem related to toposurface in Revit 2014:

As I know the cloumn bases & tops seem to only attach to roofs, floors & reference planes etc. Can they be attached to toposurface?? I know the column bases can be dragged below the toposuface, but I want the column bases just touch the toposurface. If it cannot doing this, is there other method to do the similar work?

Thanks.

[constantin.stroescu · Accepted solution]

you can not attach it directly to a Toposurface. Anyway this is not as in real life, where you need a foundation for the columns that goes into the terrain...

But , if you want this , I suggest to use a workaround:

1. make a vertical Section through the columns and toposurface
2. in this section , draw Level at a small distance from the terrain profile section line: in Section View > Architecture > Datum > Level
3. Attach the column to that Level: select Column > Modify Column > Atach Top/Base > Base 
4. In order to make visible the cut line in 3d View, use Building Pad: in 3d View and Wireframe Visual Stuyle -  Massing and Site > Building Pad > Boundary Lines > Pick Lines - pick on the base contour lines with with the Constraint (from Properties) set to the Level created in step 2

[sam_hsu]

Sorry for the late reply. Thanks for your advise and I will give it a shot.